Use pre-parsed xml for GtkBuilder resource files

This enables the xml-preparser gresource option which runs the xml through g_markup_parser_context_record(), and saves the generated binary format instead of the xml. We then check for the magic marker in the GtkBuilder code so that this automatically uses g_markup_parser_context_replay() instead, to avoid any parsing. The binary format is also smaller.
2018-09-10 05:09:12 +02:00
4818 changed files with 678421 additions and 852038 deletions
--- a/.clang-format
+++ b/.clang-format
@@ -1,11 +0,0 @@
-# See https://wiki.apertis.org/Guidelines/Coding_conventions#Code_formatting
-BasedOnStyle: GNU
-AlwaysBreakAfterDefinitionReturnType: All
-BreakBeforeBinaryOperators: None
-BinPackParameters: false
-SpaceAfterCStyleCast: true
-# Our column limit is actually 80, but setting that results in clang-format
-# making a lot of dubious hanging-indent choices; disable it and assume the
-# developer will line wrap appropriately. clang-format will still check
-# existing hanging indents.
-ColumnLimit: 0
--- a/.gitignore
+++ b/.gitignore
@@ -1 +0,0 @@
-/subprojects/*/
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,11 +1,5 @@
-include:
-  - project: 'gnome/citemplates'
-    file: 'flatpak/flatpak_ci_initiative.yml'
-
 stages:
  - build
-  - analysis
-  - docs
  - flatpak
  - deploy

@@ -18,291 +12,69 @@ stages:
    - subprojects/libepoxy/
    - subprojects/pango/

-# Common variables
-variables:
-  COMMON_MESON_FLAGS: "-Dwerror=true -Dglib:werror=false -Dpango:werror=false -Dgtk-doc:werror=false -Dwayland-protocols:werror=false -Dsysprof:werror=false"
-  BACKEND_FLAGS: "-Dx11-backend=true -Dwayland-backend=true -Dbroadway-backend=true"
-  FEATURE_FLAGS: "-Dvulkan=enabled -Dcloudproviders=enabled"
-  MESON_TEST_TIMEOUT_MULTIPLIER: 3
-  FEDORA_IMAGE: "registry.gitlab.gnome.org/gnome/gtk/fedora:v27"
-  FLATPAK_IMAGE: "registry.gitlab.gnome.org/gnome/gnome-runtime-images/gnome:master"
-  DOCS_IMAGE: "registry.gitlab.gnome.org/gnome/gtk/fedora-docs:v25"
-
-.only-default:
-  only:
-    - branches
-  except:
-    - tags
-
-style-check-diff:
-  extends: .only-default
-  image: $FEDORA_IMAGE
-  stage: .pre
-  allow_failure: true
+fedora-x86_64:
+  image: registry.gitlab.gnome.org/gnome/gtk/master:v1
+  stage: build
  script:
-    - .gitlab-ci/run-style-check-diff.sh
-
-.build-fedora-default:
-  extends: .only-default
-  image: $FEDORA_IMAGE
+    - bash -x ./.gitlab-ci/test-docker.sh
  artifacts:
-    when: always
-    reports:
-      junit:
-        - "${CI_PROJECT_DIR}/_build/report-x11.xml"
-        - "${CI_PROJECT_DIR}/_build/report-wayland.xml"
-        - "${CI_PROJECT_DIR}/_build/report-broadway.xml"
+    when: on_failure
    name: "gtk-${CI_COMMIT_REF_NAME}"
    paths:
      - "${CI_PROJECT_DIR}/_build/meson-logs"
-      - "${CI_PROJECT_DIR}/_build/report*.xml"
-      - "${CI_PROJECT_DIR}/_build/report*.html"
-      - "${CI_PROJECT_DIR}/_build/testsuite/reftests/output/*/*.png"
-      - "${CI_PROJECT_DIR}/_build/testsuite/gsk/compare/*/*/*.png"
-      - "${CI_PROJECT_DIR}/_build/testsuite/css/output/*/*.syscap"
  cache:
    key: "$CI_JOB_NAME"
-    paths:
-      - _ccache/
-      - subprojects/gdk-pixbuf/
-      - subprojects/glib/
-      - subprojects/graphene/
-      - subprojects/libepoxy/
-      - subprojects/pango/
+    <<: *cache-paths

-fedora-x86_64:
-  extends: .build-fedora-default
-  stage: build
-  needs: []
-  variables:
-    EXTRA_MESON_FLAGS: "--buildtype=debug --default-library=both"
-  script:
-    - meson subprojects update
-    - meson ${COMMON_MESON_FLAGS} ${EXTRA_MESON_FLAGS} ${BACKEND_FLAGS} ${FEATURE_FLAGS}
-            _build
-    - ninja -C _build
-    - .gitlab-ci/run-tests.sh _build x11
-    - .gitlab-ci/run-tests.sh _build wayland
-    - .gitlab-ci/run-tests.sh _build broadway
-
-release-build:
-  extends: .build-fedora-default
-  stage: build
-  needs: []
-  variables:
-    EXTRA_MESON_FLAGS: "--buildtype=release"
-  script:
-    - meson subprojects update
-    - meson ${COMMON_MESON_FLAGS} ${EXTRA_MESON_FLAGS} ${BACKEND_FLAGS} ${FEATURE_FLAGS}
-            _build
-    - ninja -C _build
-    - .gitlab-ci/run-tests.sh _build x11
-
-installed-tests:
-  extends: .build-fedora-default
-  stage: build
-  needs: []
-  variables:
-    EXTRA_MESON_FLAGS: "--prefix=/usr --libdir=/usr/lib64 -Dinstall-tests=true"
-    G_TEST_ACCESSIBLE: 1
-  script:
-    - meson subprojects update
-    - meson ${COMMON_MESON_FLAGS} ${EXTRA_MESON_FLAGS} ${BACKEND_FLAGS} ${FEATURE_FLAGS}
-            _build
-    - ninja -C _build
-    - sudo ninja -C _build install
-    - dbus-run-session xvfb-run -a -s "-screen 0 1024x768x24"
-            gnome-desktop-testing-runner
-                   --report-directory=_build/installed-tests-report/failed/
-                   --parallel=0
-                   gtk-4.0
-  artifacts:
-    paths:
-      - "_build/installed-tests-report/"
-
-
-.mingw-defaults:
-  extends: .only-default
+.mingw-defaults: &mingw-defaults
  stage: build
  tags:
-    - win32-ps
+    - win32
  script:
    - C:\msys64\usr\bin\pacman --noconfirm -Syyuu
    - C:\msys64\usr\bin\bash -lc "bash -x ./.gitlab-ci/test-msys2.sh"
  cache:
-    key: "$CI_JOB_NAME"
-    paths:
-      - _ccache/
-      - subprojects/gdk-pixbuf/
-      - subprojects/glib/
-      - subprojects/graphene/
-      - subprojects/libepoxy/
-      - subprojects/pango/
+    key: "%CI_JOB_NAME%"
+    <<: *cache-paths

-msys2-mingw64:
-  extends: .mingw-defaults
-  needs: []
+msys2-mingw32:
  variables:
-    MSYSTEM: "MINGW64"
+    MSYSTEM: "MINGW32"
    CHERE_INVOKING: "yes"
+  <<: *mingw-defaults

-macos:
-  extends: .only-default
-  only:
-    - branches@GNOME/gtk
-  stage: build
-  tags:
-    - macos
-  needs: []
-  before_script:
-    - bash .gitlab-ci/show-execution-environment.sh
-    - pip3 install --user meson==0.56
-    - pip3 install --user ninja
-    - export PATH=/Users/gitlabrunner/Library/Python/3.7/bin:$PATH
-  script:
-    - meson -Dx11-backend=false
-            -Dintrospection=disabled
-            -Dcpp_std=c++11
-            -Dpixman:tests=disabled
-            _build
-    - ninja -C _build
-  artifacts:
-    when: always
-    paths:
-      - "${CI_PROJECT_DIR}/_build/meson-logs"
-
-.flatpak-defaults:
-  image: $FLATPAK_IMAGE
+.flatpak-defaults: &flatpak-defaults
+  image: registry.gitlab.gnome.org/gnome/gnome-runtime-images/gnome:master
  stage: flatpak
-  allow_failure: true
-  tags:
-    - flatpak
  artifacts:
    paths:
      - "${APPID}-dev.flatpak"
-      - 'repo.tar'
    expire_in: 1 day
  script:
    - bash -x ./.gitlab-ci/flatpak-build.sh "${APPID}"

-# Manual jobs, for branches and MRs
-.flatpak-manual:
-  extends: .flatpak-defaults
-  when: manual
-
-# Only build Flatpak bundles automatically on master
-.flatpak-master:
-  extends: .flatpak-defaults
-  only:
-    - master
-
-flatpak-manual:demo:
-  extends: .flatpak-manual
-  needs: []
+flatpak:demo:
  variables:
-    APPID: org.gtk.Demo4
+    APPID: org.gtk.Demo
+  <<: *flatpak-defaults

-flatpak-master:demo:
-  extends: .flatpak-master
-  needs: []
+flatpak:widget-factory:
  variables:
-    APPID: org.gtk.Demo4
-
-flatpak-manual:widget-factory:
-  extends: .flatpak-manual
-  needs: []
-  variables:
-    APPID: org.gtk.WidgetFactory4
-
-flatpak-master:widget-factory:
-  extends: .flatpak-master
-  needs: []
-  variables:
-    APPID: org.gtk.WidgetFactory4
-
-flatpak-manual:icon-browser:
-  extends: .flatpak-manual
-  needs: []
-  variables:
-    APPID: org.gtk.IconBrowser4
-
-flatpak-master:icon-browser:
-  extends: .flatpak-master
-  needs: []
-  variables:
-    APPID: org.gtk.IconBrowser4
-
-# Publish the demo apps to the GNOME Nightly repo
-# https://wiki.gnome.org/Apps/Nightly
-# https://gitlab.gnome.org/GNOME/Initiatives/-/wikis/DevOps-with-Flatpak
-nightly demo:
-    extends: '.publish_nightly'
-    dependencies: ['flatpak-master:demo']
-    needs: ['flatpak-master:demo']
-
-nightly factory:
-    extends: '.publish_nightly'
-    dependencies: ['flatpak-master:widget-factory']
-    needs: ['flatpak-master:widget-factory']
-
-nightly icon-browser:
-    extends: '.publish_nightly'
-    dependencies: ['flatpak-master:icon-browser']
-    needs: ['flatpak-master:icon-browser']
-
-static-scan:
-  image: $FEDORA_IMAGE
-  stage: analysis
-  needs: []
-  variables:
-    EXTRA_MESON_FLAGS: "--buildtype=debug"
-  script:
-    - meson ${COMMON_MESON_FLAGS} ${EXTRA_MESON_FLAGS} _scan_build
-    - ninja -C _scan_build scan-build
-  artifacts:
-    paths:
-      - _scan_build/meson-logs
-  allow_failure: true
-
-# Run tests with the address sanitizer. We need to turn off introspection,
-# since it is incompatible with asan
-asan-build:
-  image: $FEDORA_IMAGE
-  tags: [ asan ]
-  stage: analysis
-  needs: []
-  variables:
-  script:
-    - CC=clang meson --buildtype=debugoptimized -Db_sanitize=address -Db_lundef=false -Dintrospection=disabled _build
-    - ninja -C _build
-    - .gitlab-ci/run-tests.sh _build wayland
-  artifacts:
-    paths:
-      - _build/meson-logs
-  allow_failure: true
-
-reference:
-  image: $DOCS_IMAGE
-  stage: docs
-  needs: []
-  variables:
-    EXTRA_MESON_FLAGS: "--buildtype=release"
-  script:
-    - meson ${COMMON_MESON_FLAGS} ${EXTRA_MESON_FLAGS} -Dgtk_doc=true _build
-    - ninja -C _build gdk4-doc gsk4-doc gtk4-doc
-    - mkdir -p _reference/
-    - mv _build/docs/reference/gdk/html/ _reference/gdk/
-    - mv _build/docs/reference/gsk/html/ _reference/gsk/
-    - mv _build/docs/reference/gtk/html/ _reference/gtk/
-  artifacts:
-    paths:
-      - _reference
+    APPID: org.gtk.WidgetFactory
+  <<: *flatpak-defaults

 pages:
-  stage: deploy
-  needs: ['reference']
+  image: registry.gitlab.gnome.org/gnome/gtk/master:v1
+  stage: deploy 
  script:
-    - mv _reference/ public/
+    - meson -Ddocumentation=true _build .
+    - ninja -C _build
+    - ninja -C _build gdk4-doc gsk4-doc gtk4-doc
+
+    - mkdir -p public/
+    - mv _build/docs/reference/gtk/html/ public/gtk/
+    - mv _build/docs/reference/gdk/html/ public/gdk/
+    - mv _build/docs/reference/gsk/html/ public/gsk/
  artifacts:
    paths:
      - public
--- a/.gitlab-ci/Dockerfile
+++ b/.gitlab-ci/Dockerfile
@@ -0,0 +1,81 @@
+FROM fedora:28
+
+RUN dnf -y install \
+    hicolor-icon-theme \
+    adwaita-icon-theme \
+    atk-devel \
+    at-spi2-atk-devel \
+    avahi-gobject-devel \
+    cairo-devel \
+    cairo-gobject-devel \
+    ccache \
+    colord-devel \
+    cups-devel \
+    desktop-file-utils \
+    elfutils-libelf-devel \
+    fribidi-devel \
+    gcc \
+    gcc-c++ \
+    gdk-pixbuf2-devel \
+    gdk-pixbuf2-modules \
+    gettext \
+    git \
+    glib2-devel \
+    glibc-devel \
+    glibc-headers \
+    gobject-introspection-devel \
+    graphene-devel \
+    gstreamer1-devel \
+    gstreamer1-plugins-good \
+    gstreamer1-plugins-bad-free-devel \
+    gstreamer1-plugins-base-devel \
+    gtk-doc \
+    iso-codes \
+    itstool \
+    json-glib-devel \
+    libattr-devel \
+    libepoxy-devel \
+    libffi-devel \
+    libmount-devel \
+    librsvg2 \
+    libselinux-devel \
+    libXcomposite-devel \
+    libXcursor-devel \
+    libXcursor-devel \
+    libXdamage-devel \
+    libXfixes-devel \
+    libXi-devel \
+    libXinerama-devel \
+    libxkbcommon-devel \
+    libXrandr-devel \
+    libXrender-devel \
+    libxslt \
+    mesa-dri-drivers \
+    mesa-libEGL-devel \
+    mesa-libwayland-egl-devel \
+    ninja-build \
+    pango-devel \
+    pcre-devel \
+    python3 \
+    python3-pip \
+    python3-wheel \
+    redhat-rpm-config \
+    sassc \
+    systemtap-sdt-devel \
+    vulkan-devel \
+    wayland-devel \
+    wayland-protocols-devel \
+    which \
+    xorg-x11-server-Xvfb \
+ && dnf clean all
+
+RUN pip3 install meson
+
+ARG HOST_USER_ID=5555
+ENV HOST_USER_ID ${HOST_USER_ID}
+RUN useradd -u $HOST_USER_ID -ms /bin/bash user
+
+USER user
+WORKDIR /home/user
+
+ENV LANG C.UTF-8
--- a/.gitlab-ci/README.md
+++ b/.gitlab-ci/README.md
@@ -1,47 +0,0 @@
-## GTK CI infrastructure
-
-GTK uses different CI images depending on platform and jobs.
-
-The CI images are Docker containers, generated either using `docker` or
-`podman`, and pushed to the GitLab [container registry][registry].
-
-Each Docker image has a tag composed of two parts:
-
- - `${image}`: the base image for a given platform, like "fedora" or
-   "debian-stable"
- - `${number}`: an incremental version number, or `latest`
-
-See the [container registry][registry] for the available images for each
-branch, as well as their available versions.
-
-### Checklist for Updating a CI image
-
- - [ ] Update the `${image}.Dockerfile` file with the dependencies
- - [ ] Run `./run-docker.sh build --base ${image} --base-version ${number}`
- - [ ] Run `./run-docker.sh push --base ${image} --base-version ${number}`
-   once the Docker image is built; you may need to log in by using
-   `docker login` or `podman login`
- - [ ] Update the `image` keys in the `.gitlab-ci.yml` file with the new
-   image tag
- - [ ] Open a merge request with your changes and let it run
-
-### Checklist for Adding a new CI image
-
- - [ ] Write a new `${image}.Dockerfile` with the instructions to set up
-   a build environment
- - [ ] Add the `pip3 install meson` incantation
- - [ ] Run `./run-docker.sh build --base ${image} --base-version ${number}`
- - [ ] Run `./run-docker.sh push --base ${image} --base-version ${number}`
- - [ ] Add the new job to `.gitlab-ci.yml` referencing the image
- - [ ] Open a merge request with your changes and let it run
-
-### Checklist for Adding a new dependency to a CI image
-
-Our images are layered, and the base (called fedora-base) contains
-all the rpm payload. Therefore, adding a new dependency is a 2-step
-process:
-
- 1. [ ] Build and upload fedora-base:$version+1
- 1. [ ] Build and upload fedora:$version+1 based on fedora-base:version+1
-
-[registry]: https://gitlab.gnome.org/GNOME/gtk/container_registry
--- a/.gitlab-ci/clang-format-diff.py
+++ b/.gitlab-ci/clang-format-diff.py
@@ -1,133 +0,0 @@
-#!/usr/bin/env python3
-#
-# === clang-format-diff.py - ClangFormat Diff Reformatter ---*- python -*-=== #
-#
-# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-# See https://llvm.org/LICENSE.txt for license information.
-# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-#
-# ===---------------------------------------------------------------------=== #
-
-"""
-This script reads input from a unified diff and reformats all the changed
-lines. This is useful to reformat all the lines touched by a specific patch.
-Example usage for git/svn users:
-
-  git diff -U0 --no-color HEAD^ | clang-format-diff.py -p1 -i
-  svn diff --diff-cmd=diff -x-U0 | clang-format-diff.py -i
-
-"""
-from __future__ import absolute_import, division, print_function
-
-import argparse
-import difflib
-import re
-import subprocess
-import sys
-
-if sys.version_info.major >= 3:
-    from io import StringIO
-else:
-    from io import BytesIO as StringIO
-
-
-def main():
-    parser = argparse.ArgumentParser(
-        description=__doc__,
-        formatter_class=argparse.RawDescriptionHelpFormatter)
-    parser.add_argument('-i', action='store_true', default=False,
-                        help='apply edits to files instead of displaying a '
-                             'diff')
-    parser.add_argument('-p', metavar='NUM', default=0,
-                        help='strip the smallest prefix containing P slashes')
-    parser.add_argument('-regex', metavar='PATTERN', default=None,
-                        help='custom pattern selecting file paths to reformat '
-                        '(case sensitive, overrides -iregex)')
-    parser.add_argument('-iregex', metavar='PATTERN',
-                        default=r'.*\.(cpp|cc|c\+\+|cxx|c|cl|h|hh|hpp|m|mm|inc'
-                                r'|js|ts|proto|protodevel|java|cs)',
-                        help='custom pattern selecting file paths to reformat '
-                             '(case insensitive, overridden by -regex)')
-    parser.add_argument('-sort-includes', action='store_true', default=False,
-                        help='let clang-format sort include blocks')
-    parser.add_argument('-v', '--verbose', action='store_true',
-                        help='be more verbose, ineffective without -i')
-    parser.add_argument('-style',
-                        help='formatting style to apply (LLVM, Google, '
-                        'Chromium, Mozilla, WebKit)')
-    parser.add_argument('-binary', default='clang-format',
-                        help='location of binary to use for clang-format')
-    args = parser.parse_args()
-
-    # Extract changed lines for each file.
-    filename = None
-    lines_by_file = {}
-    for line in sys.stdin:
-        match = re.search(r'^\+\+\+\ (.*?/){%s}(\S*)' % args.p, line)
-        if match:
-            filename = match.group(2)
-        if filename is None:
-            continue
-
-        if args.regex is not None:
-            if not re.match('^%s$' % args.regex, filename):
-                continue
-        else:
-            if not re.match('^%s$' % args.iregex, filename, re.IGNORECASE):
-                continue
-
-        match = re.search(r'^@@.*\+(\d+)(,(\d+))?', line)
-        if match:
-            start_line = int(match.group(1))
-            line_count = 1
-            if match.group(3):
-                line_count = int(match.group(3))
-            if line_count == 0:
-                continue
-            end_line = start_line + line_count - 1
-            lines_by_file.setdefault(filename, []).extend(
-                ['-lines', str(start_line) + ':' + str(end_line)])
-
-    # Reformat files containing changes in place.
-    # We need to count amount of bytes generated in the output of
-    # clang-format-diff. If clang-format-diff doesn't generate any bytes it
-    # means there is nothing to format.
-    format_line_counter = 0
-    for filename, lines in lines_by_file.items():
-        if args.i and args.verbose:
-            print('Formatting {}'.format(filename))
-        command = [args.binary, filename]
-        if args.i:
-            command.append('-i')
-        if args.sort_includes:
-            command.append('-sort-includes')
-        command.extend(lines)
-        if args.style:
-            command.extend(['-style', args.style])
-        p = subprocess.Popen(command,
-                             stdout=subprocess.PIPE,
-                             stderr=None,
-                             stdin=subprocess.PIPE,
-                             universal_newlines=True)
-        stdout, _ = p.communicate()
-        if p.returncode != 0:
-            sys.exit(p.returncode)
-
-        if not args.i:
-            with open(filename) as f:
-                code = f.readlines()
-            formatted_code = StringIO(stdout).readlines()
-            diff = difflib.unified_diff(code, formatted_code,
-                                        filename, filename,
-                                        '(before formatting)',
-                                        '(after formatting)')
-            diff_string = ''.join(diff)
-            if diff_string:
-                format_line_counter += sys.stdout.write(diff_string)
-
-    if format_line_counter > 0:
-        sys.exit(1)
-
-
-if __name__ == '__main__':
-    main()
--- a/.gitlab-ci/fedora-base.Dockerfile
+++ b/.gitlab-ci/fedora-base.Dockerfile
@@ -1,92 +0,0 @@
-FROM fedora:31
-
-RUN dnf -y install \
-    adwaita-icon-theme \
-    atk-devel \
-    at-spi2-atk-devel \
-    avahi-gobject-devel \
-    cairo-devel \
-    cairo-gobject-devel \
-    ccache \
-    clang \
-    clang-analyzer \
-    colord-devel \
-    cups-devel \
-    dbus-daemon \
-    dbus-x11 \
-    dejavu-sans-mono-fonts \
-    desktop-file-utils \
-    diffutils \
-    elfutils-libelf-devel \
-    fribidi-devel \
-    gcc \
-    gcc-c++ \
-    gdk-pixbuf2-devel \
-    gdk-pixbuf2-modules \
-    gettext \
-    git \
-    glib2-devel \
-    glib2-static \
-    glibc-devel \
-    glibc-headers \
-    gnome-desktop-testing \
-    gobject-introspection-devel \
-    graphene-devel \
-    gstreamer1-devel \
-    gstreamer1-plugins-good \
-    gstreamer1-plugins-bad-free-devel \
-    gstreamer1-plugins-base-devel \
-    gtk-doc \
-    hicolor-icon-theme \
-    iso-codes \
-    itstool \
-    json-glib-devel \
-    lcov \
-    libasan \
-    libattr-devel \
-    libcloudproviders-devel \
-    libepoxy-devel \
-    libffi-devel \
-    libmount-devel \
-    librsvg2 \
-    libselinux-devel \
-    libubsan \
-    libXcomposite-devel \
-    libXcursor-devel \
-    libXcursor-devel \
-    libXdamage-devel \
-    libXfixes-devel \
-    libXi-devel \
-    libXinerama-devel \
-    libxkbcommon-devel \
-    libXrandr-devel \
-    libXrender-devel \
-    libXtst-devel \
-    libxslt \
-    mesa-dri-drivers \
-    mesa-libEGL-devel \
-    mesa-libGLES-devel \
-    mesa-libwayland-egl-devel \
-    ninja-build \
-    pango-devel \
-    pcre-devel \
-    pcre-static \
-    python3 \
-    python3-jinja2 \
-    python3-pip \
-    python3-pygments \
-    python3-wheel \
-    redhat-rpm-config \
-    sassc \
-    systemtap-sdt-devel \
-    vulkan-devel \
-    wayland-devel \
-    wayland-protocols-devel \
-    weston \
-    weston-libs \
-    which \
-    xorg-x11-server-Xvfb \
- && dnf clean all
-
-RUN pip3 install meson==0.55.3
-
--- a/.gitlab-ci/fedora-docs.Dockerfile
+++ b/.gitlab-ci/fedora-docs.Dockerfile
@@ -1,12 +0,0 @@
-FROM registry.gitlab.gnome.org/gnome/gtk/fedora-base:v25
-
-RUN dnf -y install pandoc
-
-ARG HOST_USER_ID=5555
-ENV HOST_USER_ID ${HOST_USER_ID}
-RUN useradd -u $HOST_USER_ID -ms /bin/bash user
-
-USER user
-WORKDIR /home/user
-
-ENV LANG C.UTF-8
--- a/.gitlab-ci/fedora.Dockerfile
+++ b/.gitlab-ci/fedora.Dockerfile
@@ -1,13 +0,0 @@
-FROM registry.gitlab.gnome.org/gnome/gtk/fedora-base:v27
-
-# Enable sudo for wheel users
-RUN sed -i -e 's/# %wheel/%wheel/' -e '0,/%wheel/{s/%wheel/# %wheel/}' /etc/sudoers
-
-ARG HOST_USER_ID=5555
-ENV HOST_USER_ID ${HOST_USER_ID}
-RUN useradd -u $HOST_USER_ID -G wheel -ms /bin/bash user
-
-USER user
-WORKDIR /home/user
-
-ENV LANG C.UTF-8
--- a/.gitlab-ci/flatpak-build.sh
+++ b/.gitlab-ci/flatpak-build.sh
@@ -4,32 +4,34 @@ set -e

 appid=$1

-builddir=flatpak_app
+builddir=app
 repodir=repo

 flatpak-builder \
-        --user --disable-rofiles-fuse \
        --stop-at=gtk \
        ${builddir} \
        build-aux/flatpak/${appid}.json

-flatpak build ${builddir} meson \
-                --prefix=/app \
-                --libdir=/app/lib \
-                --buildtype=release \
+flatpak-builder \
+        --run ${builddir} build-aux/flatpak/${appid}.json \
+        meson \
+                --prefix /app \
+                --libdir /app/lib \
+                --buildtype debug \
                -Dx11-backend=true \
                -Dwayland-backend=true \
                -Dprint-backends=file \
                -Dbuild-tests=false \
                -Dbuild-examples=false \
-                -Dintrospection=disabled \
+                -Dintrospection=false \
                -Ddemos=true \
-                _flatpak_build
-
-flatpak build ${builddir} ninja -C _flatpak_build install
+                _build .
+
+flatpak-builder \
+        --run ${builddir} build-aux/flatpak/${appid}.json \
+        ninja -C _build install

 flatpak-builder \
-        --user --disable-rofiles-fuse \
        --finish-only \
        --repo=${repodir} \
        ${builddir} \
@@ -38,10 +40,5 @@ flatpak-builder \
 flatpak build-bundle \
        ${repodir} \
        ${appid}-dev.flatpak \
-        --runtime-repo=https://nightly.gnome.org/gnome-nightly.flatpakrepo \
+        --runtime-repo=https://flathub.org/repo/flathub.flatpakrepo \
        ${appid}
-
-# to be consumed by the nightly publish jobs
-if [[ $CI_COMMIT_BRANCH == master ]]; then
-        tar cf repo.tar ${repodir}
-fi
--- a/.gitlab-ci/meson-html-report.py
+++ b/.gitlab-ci/meson-html-report.py
@@ -1,371 +0,0 @@
-#!/usr/bin/env python3
-
-# Turns a Mason testlog.json file into an HTML report
-#
-# Copyright 2019  GNOME Foundation
-#
-# SPDX-License-Identifier: LGPL-2.1-or-later
-#
-# Original author: Emmanuele Bassi
-
-import argparse
-import datetime
-import json
-import os
-import sys
-from jinja2 import Template
-
-REPORT_TEMPLATE = '''
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <title>{{ report.project_name }} Test Report</title>
-  <meta charset="utf-8" />
-  <style type="text/css">
-body {
-  background: white;
-  color: #333;
-  font-family: 'Cantarell', sans-serif;
-}
-
-h1 {
-  color: #333333;
-  font-size: 1.9em;
-  font-weight: normal;
-  margin-bottom: 1em;
-  border-bottom: 1px solid #333333;
-}
-
-header {
-  position: fixed;
-  padding-bottom: 12px;
-  margin-bottom: 24px;
-  background: rgba(255, 255, 255, 0.85);
-  box-shadow: 0 0 1px rgba(0, 0, 0, 0.15);
-  z-index: 500;
-  left: 0;
-  top: 0;
-  width: 100%;
-  color: rgba(0, 0, 0, 0.3);
-  transform: translateY(0px);
-  transition: .2s background-color, color;
-  box-sizing: border-box;
-  display: block;
-  visibility: visible;
-  text-align: center;
-}
-
-article {
-  padding-top: 200px;
-  margin: 2em;
-}
-
-div.report-meta {
-  width: auto;
-  border: 1px solid #ccc;
-  padding: .5em 2em;
-  color: #3c3c3c;
-}
-
-span.result {
-  font-weight: bold;
-}
-
-span.pass {
-  color: rgb(51, 209, 122);
-}
-
-span.skip {
-  color: rgb(255, 163, 72);
-}
-
-span.fail {
-  color: rgb(224, 27, 36);
-}
-
-span.xfail {
-  color: rgb(163, 71, 186);
-}
-
-div.result {
-  border-top: 1px solid #c0c0c0;
-  padding-top: 1em;
-  padding-bottom: 1em;
-  width: 100%;
-}
-
-div.result h4 {
-  border-bottom: 1px solid #c0c0c0;
-  margin-bottom: 0.7em;
-}
-
-pre {
-  color: #fafafa;
-  background-color: black;
-  border-radius: 6px;
-  box-shadow: 0px 5px 8px 0px rgba(0, 0, 0, 0.25);
-  font-family: monospace;
-  line-height: 1.2em;
-  border: none;
-  padding: 10px 1em;
-  font-size: 0.9em;
-  overflow: auto;
-  white-space: pre;
-  word-break: normal;
-  word-wrap: normal;
-}
-
-ul.passed li {
-  display: inline;
-}
-
-ul.passed li:after {
-  content: ",";
-}
-
-ul.passed li:last-child:after {
-  content: "";
-}
-
-ul.images {
-  padding-bottom: 1em;
-}
-
-ul.images li {
-  display: inline;
-}
-  </style>
-</head>
-<body>
-  <header>
-    <h1>{{ report.project_name }}/{{ report.backend }}/{{ report.branch_name }} :: Test Reports</h1>
-  </header>
-
-  <article>
-    <section>
-      <div class="report-meta">
-        <p><strong>Backend:</strong> {{ report.backend }}</p>
-        <p><strong>Branch:</strong> {{ report.branch_name }}</p>
-        <p><strong>Date:</strong> <time datetime="{{ report.date.isoformat() }}">{{ report.locale_date }}</time></p>
-        {% if report.job_id %}<p><strong>Job ID:</strong> {{ report.job_id }}</p>{% endif %}
-      </div>
-    </section>
-
-    <section>
-      <div class="summary">
-        <h3><a name="summary">Summary</a></h3>
-        <ul>
-          <li><strong>Total units:</strong> {{ report.total_units }}</li>
-          <li><strong>Failed:</strong> {{ report.total_failures }}</li>
-          <li><strong>Passed:</strong> {{ report.total_successes }}</li>
-        </ul>
-      </div>
-    </section>
-
-    {% for suite_result in report.results_list %}
-    <section>
-      <div class="result">
-        <h3><a name="results">Suite: {{ suite_result.suite_name }}</a></h3>
-        <ul>
-          <li><strong>Units:</strong> {{ suite_result.n_units }}</li>
-          <li><strong>Failed:</strong> <a href="#{{ suite_result.suite_name }}-failed">{{ suite_result.n_failures }}</a></li>
-          <li><strong>Passed:</strong> <a href="#{{ suite_result.suite_name }}-passed">{{ suite_result.n_successes }}</a></li>
-        </ul>
-
-        <div class="failures">
-          <h4><a name="{{ suite_result.suite_name }}-failed">Failures</a></h4>
-          <ul class="failed">
-            {% for failure in suite_result.failures if failure.result in [ 'ERROR', 'FAIL', 'UNEXPECTEDPASS' ] %}
-            <li><a name="{{ failure.name }}">{{ failure.name }}</a> - result: <span class="result fail">{{ failure.result }}</span><br/>
-              {% if failure.stdout %}
-              Output: <pre>{{ failure.stdout }}</pre>
-              {% endif %}
-              {% if failure.image_data is defined %}
-              <ul class="images">
-                <li><img alt="ref" src="{{ failure.image_data.ref }}" /></li>
-                <li><img alt="out" src="{{ failure.image_data.out }}" /></li>
-                <li><img alt="diff" src="{{ failure.image_data.diff }}" /></li>
-              </ul>
-              {% endif %}
-            </li>
-            {% else %}
-            <li>None</li>
-            {% endfor %}
-          </ul>
-
-          <h4><a name="{{ suite_result.suite_name }}-timed-out">Timed out</a></h4>
-          <ul class="failed">
-            {% for failure in suite_result.failures if failure.result == 'TIMEOUT' %}
-            <li><a name="{{ failure.name }}">{{ failure.name }}</a> - result: <span class="result fail">{{ failure.result }}</span><br/>
-              {% if failure.stdout %}
-              Output: <pre>{{ failure.stdout }}</pre>
-              {% endif %}
-            </li>
-            {% else %}
-            <li>None</li>
-            {% endfor %}
-          </ul>
-        </div>
-
-        <div class="successes">
-          <h4><a name="{{ suite_result.suite_name }}-expected-fail">Expected failures</a></h4>
-          <ul>
-          {% for success in suite_result.successes if success.result == 'EXPECTEDFAIL' %}
-            <li><a name="{{ success.name }}">{{ success.name }}</a> - result: <span class="result xfail">{{ success.result }}</span><br/>
-            {% if success.stdout %}
-              Output: <pre>{{ success.stdout }}</pre>
-            {% endif %}
-            {% if success.image_data is defined %}
-              <ul class="images">
-                <li><img alt="ref" src="{{ success.image_data.ref }}" /></li>
-                <li><img alt="out" src="{{ success.image_data.out }}" /></li>
-                <li><img alt="diff" src="{{ success.image_data.diff }}" /></li>
-              </ul>
-            {% endif %}
-            </li>
-          {% else %}
-            <li>None</li>
-          {% endfor %}
-          </ul>
-
-          <h4><a name="{{ suite_result.suite_name }}-skipped">Skipped</a></h4>
-          <ul>
-            {% for success in suite_result.successes if success.result == 'SKIP' %}
-            <li>{{ success.name }} - result: <span class="result skip">{{ success.result }}</li>
-            {% else %}
-            <li>None</li>
-            {% endfor %}
-          </ul>
-
-          <h4><a name="{{ suite_result.suite_name }}-passed">Passed</a></h4>
-          <ul class="passed">
-            {% for success in suite_result.successes if success.result == 'OK' %}
-            <li>{{ success.name }} - result: <span class="result pass">{{ success.result }}</li>
-            {% else %}
-            <li>None</li>
-            {% endfor %}
-          </ul>
-        </div>
-
-      </div>
-    </section>
-    {% endfor %}
-
-  </article>
-</body>
-</html>
-'''
-
-aparser = argparse.ArgumentParser(description='Turns a Meson test log into an HTML report')
-aparser.add_argument('--project-name', metavar='NAME',
-                     help='The project name',
-                     default='Unknown')
-aparser.add_argument('--backend', metavar='NAME',
-                     help='The used backend',
-                     default='unknown')
-aparser.add_argument('--job-id', metavar='ID',
-                     help='The job ID for the report',
-                     default=None)
-aparser.add_argument('--branch', metavar='NAME',
-                     help='Branch of the project being tested',
-                     default='master')
-aparser.add_argument('--output', metavar='FILE',
-                     help='The output HTML file, stdout by default',
-                     type=argparse.FileType('w', encoding='UTF-8'),
-                     default=sys.stdout)
-aparser.add_argument('--reftest-suite', metavar='NAME',
-                     help='The name of the reftests suite',
-                     default='reftest')
-aparser.add_argument('--reftest-output-dir', metavar='DIR',
-                     help='The output directory for reftests data',
-                     default=None)
-aparser.add_argument('infile', metavar='FILE',
-                     help='The input testlog.json, stdin by default',
-                     type=argparse.FileType('r', encoding='UTF-8'),
-                     default=sys.stdin)
-
-args = aparser.parse_args()
-
-outfile = args.output
-
-suites = {}
-for line in args.infile:
-    data = json.loads(line)
-    (full_suite, unit_name) = data['name'].split(' / ')
-    (project_name, suite_name) = full_suite.split(':')
-
-    unit = {
-        'project-name': project_name,
-        'suite': suite_name,
-        'name': unit_name,
-        'duration': data['duration'],
-        'returncode': data['returncode'],
-        'result': data['result'],
-        'stdout': data['stdout'],
-    }
-
-    if args.reftest_output_dir is not None and suite_name == args.reftest_suite:
-        filename = unit_name.split(' ')[1]
-        basename = os.path.splitext(filename)[0]
-
-        image_data = {
-            'ref': os.path.join(args.reftest_output_dir, '{}.ref.png'.format(basename)),
-            'out': os.path.join(args.reftest_output_dir, '{}.out.png'.format(basename)),
-            'diff': os.path.join(args.reftest_output_dir, '{}.diff.png'.format(basename)),
-        }
-
-        unit['image_data'] = image_data
-
-    units = suites.setdefault(full_suite, [])
-    units.append(unit)
-
-report = {}
-report['date'] = datetime.datetime.utcnow()
-report['locale_date'] = report['date'].strftime("%c")
-report['project_name'] = args.project_name
-report['backend'] = args.backend
-report['job_id'] = args.job_id
-report['branch_name'] = args.branch
-report['total_successes'] = 0
-report['total_failures'] = 0
-report['total_units'] = 0
-report['results_list'] = []
-
-for name, units in suites.items():
-    (project_name, suite_name) = name.split(':')
-    print('Processing {} suite {}:'.format(project_name, suite_name))
-
-    def if_failed(unit):
-        if unit['result'] in ['FAIL', 'UNEXPECTEDPASS', 'TIMEOUT', 'ERROR',]:
-            return True
-        return False
-
-    def if_succeded(unit):
-        if unit['result'] in ['OK', 'EXPECTEDFAIL', 'SKIP']:
-            return True
-        return False
-
-    successes = list(filter(if_succeded, units))
-    failures = list(filter(if_failed, units))
-
-    n_units = len(units)
-    n_successes = len(successes)
-    n_failures = len(failures)
-
-    report['total_units'] += n_units
-    report['total_successes'] += n_successes
-    report['total_failures'] += n_failures
-    print(' - {}: {} total, {} pass, {} fail'.format(suite_name, n_units, n_successes, n_failures))
-
-    suite_report = {
-        'suite_name': suite_name,
-        'n_units': n_units,
-        'successes': successes,
-        'n_successes': n_successes,
-        'failures': failures,
-        'n_failures': n_failures,
-    }
-    report['results_list'].append(suite_report)
-
-template = Template(REPORT_TEMPLATE)
-outfile.write(template.render({'report': report}))
--- a/.gitlab-ci/meson-junit-report.py
+++ b/.gitlab-ci/meson-junit-report.py
@@ -1,114 +0,0 @@
-#!/usr/bin/env python3
-
-# Turns a Meson testlog.json file into a JUnit XML report
-#
-# Copyright 2019  GNOME Foundation
-#
-# SPDX-License-Identifier: LGPL-2.1-or-later
-#
-# Original author: Emmanuele Bassi
-
-import argparse
-import datetime
-import json
-import os
-import sys
-import xml.etree.ElementTree as ET
-
-aparser = argparse.ArgumentParser(description='Turns a Meson test log into a JUnit report')
-aparser.add_argument('--project-name', metavar='NAME',
-                     help='The project name',
-                     default='unknown')
-aparser.add_argument('--backend', metavar='NAME',
-                     help='The used backend',
-                     default='unknown')
-aparser.add_argument('--job-id', metavar='ID',
-                     help='The job ID for the report',
-                     default='Unknown')
-aparser.add_argument('--branch', metavar='NAME',
-                     help='Branch of the project being tested',
-                     default='master')
-aparser.add_argument('--output', metavar='FILE',
-                     help='The output file, stdout by default',
-                     type=argparse.FileType('w', encoding='UTF-8'),
-                     default=sys.stdout)
-aparser.add_argument('infile', metavar='FILE',
-                     help='The input testlog.json, stdin by default',
-                     type=argparse.FileType('r', encoding='UTF-8'),
-                     default=sys.stdin)
-
-args = aparser.parse_args()
-
-outfile = args.output
-
-testsuites = ET.Element('testsuites')
-testsuites.set('id', '{}/{}'.format(args.job_id, args.branch))
-testsuites.set('package', args.project_name)
-testsuites.set('timestamp', datetime.datetime.utcnow().isoformat(timespec='minutes'))
-
-suites = {}
-for line in args.infile:
-    data = json.loads(line)
-    (full_suite, unit_name) = data['name'].split(' / ')
-    (project_name, suite_name) = full_suite.split(':')
-
-    duration = data['duration']
-    return_code = data['returncode']
-    result = data['result']
-    log = data['stdout']
-
-    unit = {
-        'suite': suite_name,
-        'name': unit_name,
-        'duration': duration,
-        'returncode': return_code,
-        'result': result,
-        'stdout': log,
-    }
-
-    units = suites.setdefault(suite_name, [])
-    units.append(unit)
-
-for name, units in suites.items():
-    print('Processing suite {} (units: {})'.format(name, len(units)))
-
-    def if_failed(unit):
-        if unit['result'] in ['ERROR', 'FAIL', 'UNEXPECTEDPASS', 'TIMEOUT']:
-            return True
-        return False
-
-    def if_succeded(unit):
-        if unit['result'] in ['OK', 'EXPECTEDFAIL', 'SKIP']:
-            return True
-        return False
-
-    successes = list(filter(if_succeded, units))
-    failures = list(filter(if_failed, units))
-    print(' - {}: {} pass, {} fail'.format(name, len(successes), len(failures)))
-
-    testsuite = ET.SubElement(testsuites, 'testsuite')
-    testsuite.set('name', '{}/{}'.format(args.project_name, name))
-    testsuite.set('tests', str(len(units)))
-    testsuite.set('errors', str(len(failures)))
-    testsuite.set('failures', str(len(failures)))
-
-    for unit in successes:
-        testcase = ET.SubElement(testsuite, 'testcase')
-        testcase.set('classname', '{}/{}'.format(args.project_name, unit['suite']))
-        testcase.set('name', '{}/{}'.format(args.backend, unit['name']))
-        testcase.set('time', str(unit['duration']))
-
-    for unit in failures:
-        testcase = ET.SubElement(testsuite, 'testcase')
-        testcase.set('classname', '{}/{}'.format(args.project_name, unit['suite']))
-        testcase.set('name', '{}/{}'.format(args.backend, unit['name']))
-        testcase.set('time', str(unit['duration']))
-
-        failure = ET.SubElement(testcase, 'failure')
-        failure.set('classname', '{}/{}'.format(args.project_name, unit['suite']))
-        testcase.set('name', '{}/{}'.format(args.backend, unit['name']))
-        failure.set('type', 'error')
-        failure.text = unit['stdout']
-
-output = ET.tostring(testsuites, encoding='unicode')
-outfile.write(output)
--- a/.gitlab-ci/run-docker.sh
+++ b/.gitlab-ci/run-docker.sh
@@ -1,135 +1,11 @@
 #!/bin/bash

-read_arg() {
-    # $1 = arg name
-    # $2 = arg value
-    # $3 = arg parameter
-    local rematch='^[^=]*=(.*)$'
-    if [[ $2 =~ $rematch ]]; then
-        read "$1" <<< "${BASH_REMATCH[1]}"
-    else
-        read "$1" <<< "$3"
-        # There is no way to shift our callers args, so
-        # return 1 to indicate they should do it instead.
-        return 1
-    fi
-}
-
 set -e

-build=0
-run=0
-push=0
-list=0
-print_help=0
-no_login=0
+TAG="registry.gitlab.gnome.org/gnome/gtk/master:v1"

-while (($# > 0)); do
-        case "${1%%=*}" in
-                build) build=1;;
-                run) run=1;;
-                push) push=1;;
-                list) list=1;;
-                help) print_help=1;;
-                --base|-b) read_arg base "$@" || shift;;
-                --base-version) read_arg base_version "$@" || shift;;
-                --no-login) no_login=1;;
-                *) echo -e "\e[1;31mERROR\e[0m: Unknown option '$1'"; exit 1;;
-        esac
-        shift
-done
-
-if [ $print_help == 1 ]; then
-        echo "$0 - Build and run Docker images"
-        echo ""
-        echo "Usage: $0 <command> [options] [basename]"
-        echo ""
-        echo "Available commands"
-        echo ""
-        echo "  build --base=<BASENAME> - Build Docker image <BASENAME>.Dockerfile"
-        echo "  run --base=<BASENAME>   - Run Docker image <BASENAME>"
-        echo "  push --base=<BASENAME>  - Push Docker image <BASENAME> to the registry"
-        echo "  list                    - List available images"
-        echo "  help                    - This help message"
-        echo ""
-        exit 0
-fi
-
-cd "$(dirname "$0")"
-
-if [ $list == 1 ]; then
-        echo "Available Docker images:"
-        for f in *.Dockerfile; do
-                filename=$( basename -- "$f" )
-                basename="${filename%.*}"
-
-                echo -e "  \e[1;39m$basename\e[0m"
-        done
-        exit 0
-fi
-
-# All commands after this require --base to be set
-if [ -z $base ]; then
-        echo "Usage: $0 <command>"
-        exit 1
-fi
-
-if [ ! -f "$base.Dockerfile" ]; then
-        echo -e "\e[1;31mERROR\e[0m: Dockerfile for '$base' not found"
-        exit 1
-fi
-
-if [ -z $base_version ]; then
-        base_version="latest"
-elif [ $base_version != "latest" ]; then
-        base_version="v$base_version"
-fi
-
-if [ ! -x "$(command -v docker)" ] || [ docker --help |& grep -q podman ]; then
-        # Docker is actually implemented by podman, and its OCI output
-        # is incompatible with some of the dockerd instances on GitLab
-        # CI runners.
-        echo "Using: Podman"
-        format="--format docker"
-        CMD="podman"
-else
-        echo "Using: Docker"
-        format=""
-        CMD="sudo docker"
-fi
-
-REGISTRY="registry.gitlab.gnome.org"
-TAG="${REGISTRY}/gnome/gtk/${base}:${base_version}"
-
-if [ $build == 1 ]; then
-        echo -e "\e[1;32mBUILDING\e[0m: ${base} as ${TAG}"
-        ${CMD} build \
-                ${format} \
-                --build-arg HOST_USER_ID="$UID" \
-                --tag "${TAG}" \
-                --file "${base}.Dockerfile" .
-        exit $?
-fi
-
-if [ $push == 1 ]; then
-        echo -e "\e[1;32mPUSHING\e[0m: ${base} as ${TAG}"
-
-        if [ $no_login == 0 ]; then
-                ${CMD} login ${REGISTRY}
-        fi
-
-        ${CMD} push ${TAG}
-        exit $?
-fi
-
-if [ $run == 1 ]; then
-        echo -e "\e[1;32mRUNNING\e[0m: ${base} as ${TAG}"
-        ${CMD} run \
-                --rm \
-                --volume "$(pwd)/..:/home/user/app" \
-                --workdir "/home/user/app" \
-                --tty \
-                --interactive "${TAG}" \
-                bash
-        exit $?
-fi
+sudo docker build --build-arg HOST_USER_ID="$UID" --tag "${TAG}" \
+    --file "Dockerfile" .
+sudo docker run --rm --security-opt label=disable \
+    --volume "$(pwd)/..:/home/user/app" --workdir "/home/user/app" \
+    --tty --interactive "${TAG}" bash
--- a/.gitlab-ci/run-style-check-diff.sh
+++ b/.gitlab-ci/run-style-check-diff.sh
@@ -1,44 +0,0 @@
-#!/bin/bash
-
-set -e
-
-# We need to add a new remote for the upstream master, since this script could
-# be running in a personal fork of the repository which has out of date branches.
-if [ "${CI_PROJECT_NAMESPACE}" != "GNOME" ]; then
-    echo "Retrieving the current upstream repository from ${CI_PROJECT_NAMESPACE}/${CI_PROJECT_NAME}..."
-    git remote add upstream https://gitlab.gnome.org/GNOME/gtk.git
-    git fetch upstream
-    ORIGIN="upstream"
-else
-    echo "Reusing the existing repository on ${CI_PROJECT_NAMESPACE}/${CI_PROJECT_NAME}"
-    ORIGIN="origin"
-fi
-
-# Work out the newest common ancestor between the detached HEAD that this CI job
-# has checked out, and the upstream target branch (which will typically be
-# `upstream/master` or `upstream/gtk-3-24`).
-#
-# `${CI_MERGE_REQUEST_TARGET_BRANCH_NAME}` is only defined if we’re running in
-# a merge request pipeline; fall back to `${CI_DEFAULT_BRANCH}` otherwise.
-newest_common_ancestor_sha=$(diff --old-line-format='' --new-line-format='' <(git rev-list --first-parent "${ORIGIN}/${CI_MERGE_REQUEST_TARGET_BRANCH_NAME:-${CI_DEFAULT_BRANCH}}") <(git rev-list --first-parent HEAD) | head -1)
-git diff -U0 --no-color "${newest_common_ancestor_sha}" | .gitlab-ci/clang-format-diff.py -binary "clang-format" -p1
-exit_status=$?
-
-# The style check is not infallible. The clang-format configuration cannot
-# perfectly describe GTK’s coding style: in particular, it cannot align
-# function arguments. The documented coding style for GTK takes priority over
-# clang-format suggestions. Hopefully we can eventually improve clang-format to
-# be configurable enough for our coding style. That’s why this CI check is OK
-# to fail: the idea is that people can look through the output and ignore it if
-# it’s wrong. (That situation can also happen if someone touches pre-existing
-# badly formatted code and it doesn’t make sense to tidy up the wider coding
-# style with the changes they’re making.)
-echo ""
-echo "Note that clang-format output is advisory and cannot always match the"
-echo "GTK coding style, documented at:"
-echo "   https://gitlab.gnome.org/GNOME/gtk/blob/master/docs/CODING-STYLE"
-echo "Warnings from this tool can be ignored in favour of the documented "
-echo "coding style, or in favour of matching the style of existing"
-echo "surrounding code."
-
-exit ${exit_status}
--- a/.gitlab-ci/run-tests.sh
+++ b/.gitlab-ci/run-tests.sh
@@ -1,83 +0,0 @@
-#!/bin/bash
-
-set +x
-set +e
-
-srcdir=$( pwd )
-builddir=$1
-backend=$2
-
-# Ignore memory leaks lower in dependencies
-export LSAN_OPTIONS=suppressions=$srcdir/lsan.supp:print_suppressions=0
-export G_SLICE=always-malloc
-
-case "${backend}" in
-  x11)
-    xvfb-run -a -s "-screen 0 1024x768x24 -noreset" \
-          meson test -C ${builddir} \
-                --timeout-multiplier "${MESON_TEST_TIMEOUT_MULTIPLIER}" \
-                --print-errorlogs \
-                --setup=${backend} \
-                --suite=gtk \
-                --no-suite=gsk-compare-broadway
-
-    # Store the exit code for the CI run, but always
-    # generate the reports
-    exit_code=$?
-    ;;
-
-  wayland)
-    export XDG_RUNTIME_DIR="$(mktemp -p $(pwd) -d xdg-runtime-XXXXXX)"
-
-    weston --backend=headless-backend.so --socket=wayland-5 --idle-time=0 &
-    compositor=$!
-    export WAYLAND_DISPLAY=wayland-5
-
-    meson test -C ${builddir} \
-                --timeout-multiplier "${MESON_TEST_TIMEOUT_MULTIPLIER}" \
-                --print-errorlogs \
-                --setup=${backend} \
-                --suite=gtk \
-                --no-suite=gsk-compare-broadway
-
-    exit_code=$?
-    kill ${compositor}
-    ;;
-
-  broadway)
-    export XDG_RUNTIME_DIR="$(mktemp -p $(pwd) -d xdg-runtime-XXXXXX)"
-
-    ${builddir}/gdk/broadway/gtk4-broadwayd :5 &
-    server=$!
-    export BROADWAY_DISPLAY=:5
-
-    meson test -C ${builddir} \
-                --timeout-multiplier "${MESON_TEST_TIMEOUT_MULTIPLIER}" \
-                --print-errorlogs \
-                --setup=${backend} \
-                --suite=gtk \
-                --no-suite=gsk-compare-opengl
-
-    # don't let Broadway failures fail the run, for now
-    exit_code=0
-    kill ${server}
-    ;;
-esac
-
-cd ${builddir}
-
-$srcdir/.gitlab-ci/meson-junit-report.py \
-        --project-name=gtk \
-        --backend=${backend} \
-        --job-id="${CI_JOB_NAME}" \
-        --output=report-${backend}.xml \
-        meson-logs/testlog-${backend}.json
-$srcdir/.gitlab-ci/meson-html-report.py \
-        --project-name=gtk \
-        --backend=${backend} \
-        --job-id="${CI_JOB_NAME}" \
-        --reftest-output-dir="testsuite/reftests/output/${backend}" \
-        --output=report-${backend}.html \
-        meson-logs/testlog-${backend}.json
-
-exit $exit_code
--- a/.gitlab-ci/show-execution-environment.sh
+++ b/.gitlab-ci/show-execution-environment.sh
@@ -1,8 +0,0 @@
-#!/bin/bash
-
-set -eux -o pipefail
-
-xcodebuild -version || :
-xcodebuild -showsdks || :
-
-system_profiler SPSoftwareDataType || :
--- a/.gitlab-ci/test-docker.sh
+++ b/.gitlab-ci/test-docker.sh
@@ -16,9 +16,6 @@ meson \
        -Dwayland-backend=true \
        -Dbroadway-backend=true \
        -Dvulkan=yes \
-        -Dprofiler=true \
-        --werror \
-        ${EXTRA_MESON_FLAGS:-} \
        _build $srcdir
 unset CCACHE_DISABLE

@@ -27,30 +24,9 @@ cd _build
 ninja
 ccache --show-stats

-set +e
-
 xvfb-run -a -s "-screen 0 1024x768x24" \
    meson test \
-        --timeout-multiplier 2 \
        --print-errorlogs \
-        --suite=gtk \
-        --no-suite=gtk:a11y
-
-# Save the exit code
-exit_code=$?
-
-# We always want to run the report generators
-$srcdir/.gitlab-ci/meson-junit-report.py \
-        --project-name=gtk \
-        --job-id="${CI_JOB_NAME}" \
-        --output=report.xml \
-        meson-logs/testlog.json
-
-$srcdir/.gitlab-ci/meson-html-report.py \
-        --project-name=GTK \
-        --job-id="${CI_JOB_NAME}" \
-        --reftest-output-dir="testsuite/reftests/output" \
-        --output=report.html \
-        meson-logs/testlog.json
-
-exit $exit_code
+        --suite=gtk+ \
+        --no-suite=gtk+:gsk \
+        --no-suite=gtk+:a11y
--- a/.gitlab-ci/test-msys2.sh
+++ b/.gitlab-ci/test-msys2.sh
@@ -37,36 +37,15 @@ mkdir -p _ccache
 export CCACHE_BASEDIR="$(pwd)"
 export CCACHE_DIR="${CCACHE_BASEDIR}/_ccache"

-# https://gitlab.gnome.org/GNOME/gtk/-/issues/2243
-# https://gitlab.gnome.org/GNOME/gtk/-/issues/3002
-
-if ! pkg-config --atleast-version=2.65.0 glib-2.0; then
-    git clone https://gitlab.gnome.org/GNOME/glib.git _glib
-    meson setup _glib_build _glib
-    meson compile -C _glib_build
-    meson install -C _glib_build
-fi
-pkg-config --modversion glib-2.0
-
-if ! pkg-config --atleast-version=1.47.0 pango; then
-    git clone https://gitlab.gnome.org/GNOME/pango.git _pango
-    meson setup _pango_build _pango
-    meson compile -C _pango_build
-    meson install -C _pango_build
-fi
-pkg-config --modversion pango
-
 # Build
 ccache --zero-stats
 ccache --show-stats
 export CCACHE_DISABLE=true
 meson \
-    -Dx11-backend=false \
-    -Dwayland-backend=false \
-    -Dwin32-backend=true \
-    -Dvulkan=disabled \
-    -Dintrospection=enabled \
-    -Dgtk:werror=true \
+    -Denable-x11-backend=false \
+    -Denable-wayland-backend=false \
+    -Denable-win32-backend=true \
+    -Dvulkan=no \
    _build
 unset CCACHE_DISABLE

--- a/.gitlab/issue_templates/Bug.md
+++ b/.gitlab/issue_templates/Bug.md
@@ -1,13 +1,4 @@
-<!--
-  Please, read the CONTRIBUTING.md guide on how to file a new issue.
-
-  https://gitlab.gnome.org/GNOME/gtk/-/blob/master/CONTRIBUTING.md
-->
 ## Steps to reproduce
-<!--
-  Please, explain the sequence of actions necessary to reproduce the
-  bug
-->

 1. ...
 2. ...
@@ -16,8 +7,8 @@
 <!--
  You should try and reproduce with the demos applications available
  under the `demos` directory, or the test programs in the `tests` directory.
-  Alternatively, please attach a *small and self-contained* example
-  *written in C* that exhibits the issue.
+  Alternatively, please attach a *small and self-contained* example that
+  exhibits the issue.
 -->

 ## Current behavior
@@ -32,17 +23,14 @@

 ## Version information
 <!--
- - Which version of GTK you are using
+ - Which version of GTK+ you are using
 - What operating system and version
  - For Linux, which distribution
- - If you built GTK yourself, the list of options used to configure the build
+ - If you built GTK+ yourself, the list of options used to configure the build
 -->

 ## Additional information
 <!--
 - Screenshots or screen recordings are useful for visual errors
-  - Attaching a screenshot or a video without explaining the current
-    behavior and the actions necessary to reproduce the bug will lead
-    to the bug being closed
 - Please report any warning or message printed on the terminal
 -->
--- a/.gitlab/issue_templates/Crash.md
+++ b/.gitlab/issue_templates/Crash.md
@@ -1,14 +1,4 @@
-<!--
-  Please, read the CONTRIBUTING.md guide on how to file a new issue.
-
-  https://gitlab.gnome.org/GNOME/gtk/-/blob/master/CONTRIBUTING.md
-->
-
 ## Steps to reproduce
-<!--
-  Please, explain the sequence of actions necessary to reproduce the
-  crash
-->

 1. ...
 2. ...
@@ -23,10 +13,10 @@

 ## Version information
 <!--
- - Which version of GTK you are using
+ - Which version of GTK+ you are using
 - What operating system and version
  - for Linux, which distribution
- - If you built GTK yourself, the list of options used to configure the build
+ - If you built GTK+ yourself, the list of options used to configure the build
 -->

 ## Warnings
--- a/30
+++ b/30
@@ -1,5 +1,5 @@
-Please do not mail any of the authors listed here
-asking questions about this version of GTK.
+Please do not mail any of the authors listed here 
+asking questions about this version of GTK+. 

 Original Authors
 ----------------
@@ -7,8 +7,8 @@ Peter Mattis      <petm@xcf.berkeley.edu>
 Spencer Kimball   <spencer@xcf.berkeley.edu>
 Josh MacDonald    <jmacd@xcf.berkeley.edu>

-The Team that build GTK 2 (in alphabetical order)
-------------------------------------------------
+The GTK+ Team (in alphabetical order)
+-------------------------------------
 Shawn T. Amundson <amundson@gtk.org>
 Jerome Bolliet    <bolliet@gtk.org>
 Damon Chaplin     <damon@gtk.org>
@@ -28,24 +28,11 @@ Jay Painter       <jpaint@gtk.org>
 Manish Singh      <manish@gtk.org>
 Owen Taylor       <otaylor@gtk.org>

-The current team (GTK 3 and 4)
------------------------------
-
-Jonas Ådahl       <jadahl@gmail.com>
-Tim Bäder         <mail@baedert.org>
-Emmanuele Bassi   <ebassi@gnome.org>
-Chun-wei Fan      <fanchunwei@src.gnome.org>
-Matthias Clasen   <mclasen@redhat.com>
-Carlos Garnacho   <mrgarnacho@gmail.com>
-Alexander Larsson <alexl@redhat.com>
-Benjamin Otte     <otte@gnome.org>
-
-
 There are many others who have contributed patches; we thank them,
-GTK is much better because of them.
+GTK+ is much better because of them.


-Over time, GTK has incorporated some pieces of software which
+Over time, GTK+ has incorporated some pieces of software which 
 started as independent projects. We list the original authors here:


@@ -76,8 +63,3 @@ DirectFB backend
 Denis Oliver Kropp
 Sven Neumann
 Mike Emmel
-
-
-gtkparasite
-----------
-Christian Hammond
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,145 +1,31 @@
-# Contribution guidelines
-
-Thank you for considering contributing to the GTK project!
-
-These guidelines are meant for new contributors, regardless of their level
-of proficiency; following them allows the maintainers of the GTK project to
-more effectively evaluate your contribution, and provide prompt feedback to
-you. Additionally, by following these guidelines you clearly communicate
-that you respect the time and effort that the people developing GTK put into
-managing the project.
-
-GTK is a complex free software GUI toolkit, and it would not exist without
-contributions from the free and open source software community. There are
-many things that we value:
-
- - bug reporting and fixing
- - documentation and examples
- - tests
- - new features
-
-Please, do not use the issue tracker for support questions. If you have
-questions on how to use GTK effectively, you can use:
-
- - the `#gtk` IRC channel on irc.gnome.org
- - the [gtk tag on the GNOME Discourse instance](https://discourse.gnome.org/tag/gtk)
-
-You can also look at the GTK tag on [Stack
-Overflow](https://stackoverflow.com/questions/tagged/gtk).
-
-The issue tracker is meant to be used for actionable issues only.
-
-## How to report bugs
-
-### Security issues
-
-You should not open a new issue for security related questions.
-
-When in doubt, send an email to the [security](mailto:security@gnome.org)
-mailing list.
-
-### Bug reports
-
-If you're reporting a bug make sure to list:
-
- 0. which version of GTK are you using?
- 0. which operating system are you using?
- 0. the necessary steps to reproduce the issue
- 0. the expected outcome
- 0. a description of the behavior; screenshots are also welcome
- 0. a small, self-contained example exhibiting the behavior; if this
-    is not available, try reproducing the issue using the GTK examples
-    or interactive tests
-
-If the issue includes a crash, you should also include:
-
- 0. the eventual warnings printed on the terminal
- 0. a backtrace, obtained with tools such as GDB or LLDB
-
-It is fine to include screenshots of screen recordings to demonstrate
-an issue that is best to understand visually, but please don't just
-dump screen recordings without further details into issues. It is
-essential that the problem is described in enough detail to reproduce
-it without watching a video.
-
-For small issues, such as:
-
- - spelling/grammar fixes in the documentation
- - typo correction
- - comment clean ups
- - changes to metadata files (CI, `.gitignore`)
- - build system changes
- - source tree clean ups and reorganizations
-
-You should directly open a merge request instead of filing a new issue.
-
-### Features and enhancements
-
-Feature discussion can be open ended and require high bandwidth channels; if
-you are proposing a new feature on the issue tracker, make sure to make
-an actionable proposal, and list:
-
- 0. what you're trying to achieve
- 0. prior art, in other toolkits or applications
- 0. design and theming changes
-
-If you're proposing the integration of new features it helps to have
-multiple applications using shared or similar code, especially if they have
-iterated over it various times.
-
-Each feature should also come fully documented, and with tests.
-
-## Your first contribution
-
-### Prerequisites
-
-If you want to contribute to the GTK project, you will need to have the
-development tools appropriate for your operating system, including:
+If you want to hack on the GTK+ project, you'll need to have the development
+tools appropriate for your operating system, including:

 - Python 3.x
 - Meson
 - Ninja
 - Gettext (19.7 or newer)
- - a [C99 compatible compiler](https://wiki.gnome.org/Projects/GLib/CompilerRequirements)
+ - a C99 compatible compiler

 Up-to-date instructions about developing GNOME applications and libraries
-can be found on [the GNOME Developer Center](https://developer.gnome.org).
+can be found here:

-The GTK project uses GitLab for code hosting and for tracking issues. More
-information about using GitLab can be found [on the GNOME
-wiki](https://wiki.gnome.org/GitLab).
+ * https://developer.gnome.org

-### Dependencies
+Information about using GitLab with GNOME can be found here:

-In order to get GTK from Git installed on your system, you need to have the
-required versions of all the software dependencies required by GTK; typically,
-this means a recent version of GLib, Cairo, Pango, and ATK, as well as the
-platform-specific dependencies for the windowing system you are using (Wayland,
-X11, Windows, or macOS).
+ * https://wiki.gnome.org/GitLab

-The core dependencies for GTK are:
-
- - [GLib, GObject, and GIO](https://gitlab.gnome.org/GNOME/glib)
- - [Cairo](http://cairographics.org)
- - [Pango](https://gitlab.gnome.org/GNOME/pango)
- - [GdkPixbuf](https://gitlab.gnome.org/GNOME/gdk-pixbuf)
- - [Epoxy](https://github.com/anholt/libepoxy)
- - [ATK](https://gitlab.gnome.org/GNOME/atk)
- - [Graphene](https://github.com/ebassi/graphene)
-
-GTK will attempt to download and build some of these dependencies if it
-cannot find them on your system.
-
-Additionally, you may want to look at projects that create a development
-environment for you, like [jhbuild](https://wiki.gnome.org/HowDoI/Jhbuild)
-and [gvsbuild](https://github.com/wingtk/gvsbuild).
-
-### Getting started
+In order to get Git GTK+ installed on your system, you need to have the
+required versions of all the GTK+ dependencies; typically, this means a
+recent version of GLib, Cairo, Pango, and ATK, as well as the platform
+specific dependencies for the windowing system you are using (Wayland, X11,
+Windows, or macOS).

 You should start by forking the GTK repository from the GitLab web UI, and
 cloning from your fork:

-```sh
+```ssh
 $ git clone https://gitlab.gnome.org/yourusername/gtk.git
 $ cd gtk
 ```
@@ -152,7 +38,7 @@ $ git clone git@gitlab.gnome.org:GNOME/gtk.git
 $ cd gtk
 ```

-To compile the Git version of GTK on your system, you will need to
+To compile the Git version of GTK+ on your system, you will need to
 configure your build using Meson:

 ```sh
@@ -161,6 +47,11 @@ $ cd _builddir
 $ ninja
 ```

+**Note**: For information about submitting patches and pushing changes
+to Git, see the [README.md](./README.md) and [README.commits.md](./README.commits.md) files. In particular,
+don't, under any circumstances, push anything to Git before reading and
+understanding [README.commits.md](./README.commits.md).
+
 Typically, you should work on your own branch:

 ```sh
@@ -169,99 +60,6 @@ $ git checkout -b your-branch

 Once you've finished working on the bug fix or feature, push the branch
 to the Git repository and open a new merge request, to let the GTK
-maintainers review your contribution.
-
-### Code reviews
-
-Each contribution is reviewed by the core developers of the GTK project.
-
-The [CODEOWNERS](./docs/CODEOWNERS) document contains the list of core
-contributors to GTK and the areas for which they are responsible; you
-should ensure to receive their review and signoff on your changes.
-
-### Commit messages
-
-The expected format for git commit messages is as follows:
-
-```plain
-Short explanation of the commit
-
-Longer explanation explaining exactly what's changed, whether any
-external or private interfaces changed, what bugs were fixed (with bug
-tracker reference if applicable) and so forth. Be concise but not too
-brief.
-
-Closes #1234
-```
-
- - Always add a brief description of the commit to the _first_ line of
- the commit and terminate by two newlines (it will work without the
- second newline, but that is not nice for the interfaces).
-
- - First line (the brief description) must only be one sentence and
- should start with a capital letter unless it starts with a lowercase
- symbol or identifier. Don't use a trailing period either. Don't exceed
- 72 characters.
-
- - The main description (the body) is normal prose and should use normal
- punctuation and capital letters where appropriate. Consider the commit
- message as an email sent to the developers (or yourself, six months
- down the line) detailing **why** you changed something. There's no need
- to specify the **how**: the changes can be inlined.
-
- - When committing code on behalf of others use the `--author` option, e.g.
- `git commit -a --author "Joe Coder <joe@coder.org>"` and `--signoff`.
-
- - If your commit is addressing an issue, use the
- [GitLab syntax](https://docs.gitlab.com/ce/user/project/issues/automatic_issue_closing.html)
- to automatically close the issue when merging the commit with the upstream
- repository:
-
-```plain
-Closes #1234
-Fixes #1234
-Closes: https://gitlab.gnome.org/GNOME/gtk/issues/1234
-```
-
- - If you have a merge request with multiple commits and none of them
- completely fixes an issue, you should add a reference to the issue in
- the commit message, e.g. `Bug: #1234`, and use the automatic issue
- closing syntax in the description of the merge request.
-
-### Commit access to the GTK repository
-
-GTK is part of the GNOME infrastructure. At the current time, any
-person with write access to the GNOME repository can merge changes to
-GTK. This is a good thing, in that it encourages many people to work
-on GTK, and progress can be made quickly. However, GTK is a fairly
-large and complicated project on which many other things depend, so to
-avoid unnecessary breakage, and to take advantage of the knowledge
-about GTK that has been built up over the years, we'd like to ask
-people committing to GTK to follow a few rules:
-
-0. Ask first. If your changes are major, or could possibly break existing
-   code, you should always ask. If your change is minor and you've been
-   working on GTK for a while it probably isn't necessary to ask. But when
-   in doubt, ask. Even if your change is correct, somebody may know a
-   better way to do things. If you are making changes to GTK, you should
-   be subscribed to the [gtk-devel](https://mail.gnome.org/mailman/listinfo/gtk-devel-list)
-   mailing list; this is a good place to ask about intended changes.
-   The `#gtk` IRC channel on irc.gnome.org is also a good place to find GTK
-   developers to discuss changes, but if you live outside of the EU/US time
-   zones, an email to the gtk-devel mailing list is the most certain and
-   preferred method.
-
-0. Ask _first_.
-
-0. Always write a meaningful commit message. Changes without a sufficient
-   commit message will be reverted.
-
-0. Never push to the `master` branch, or any stable branches, directly; you
-   should always go through a merge request, to ensure that the code is
-   tested on the CI infrastructure at the very least. A merge request is
-   also the proper place to get a comprehensive code review from the core
-   developers of GTK.
-
-If you have been contributing to GTK for a while and you don't have commit
-access to the repository, you may ask to obtain it following the [GNOME account
-process](https://wiki.gnome.org/AccountsTeam/NewAccounts).
+maintainers review your contribution. The [CODE-OWNERS](./docs/CODE-OWNERS)
+document contains the list of core contributors to GTK and the areas for
+which they are responsible.
--- a/8064
+++ b/8064
--- a/NEWS.pre-4.0
+++ b/NEWS.pre-4.0
--- a/README.commits.md
+++ b/README.commits.md
@@ -0,0 +1,71 @@
+GTK+ is part of the GNOME git repository. At the current time, any
+person with write access to the GNOME repository, can make changes to
+GTK+. This is a good thing, in that it encourages many people to work
+on GTK+, and progress can be made quickly. However, GTK+ is a fairly
+large and complicated package that many other things depend on, so to
+avoid unnecessary breakage, and to take advantage of the knowledge
+about GTK+ that has been built up over the years, we'd like to ask
+people committing to GTK+ to follow a few rules:
+
+0. Ask first. If your changes are major, or could possibly break existing
+   code, you should always ask. If your change is minor and you've
+   been working on GTK+ for a while it probably isn't necessary
+   to ask. But when in doubt, ask. Even if your change is correct,
+   somebody may know a better way to do things.
+   If you are making changes to GTK+, you should be subscribed
+   to gtk-devel-list@gnome.org. (Subscription address:
+   gtk-devel-list-request@gnome.org.) This is a good place to ask
+   about intended changes.
+   #gtk+ on GIMPNet (irc.gimp.org, irc.us.gimp.org, irc.eu.gimp.org, ...)
+   is also a good place to find GTK+ developers to discuss changes with,
+   however, email to gtk-devel-list is the most certain and preferred
+   method.
+
+0. Ask _first_.
+
+0. With git, we no longer maintain a ChangeLog file, but you are expected
+   to produce a meaningful commit message. Changes without a sufficient
+   commit message will be reverted. See below for the expected format
+   of commit messages.
+
+Notes:
+
+* When developing larger features or complicated bug fixes, it is
+  advisable to work in a branch in your own cloned GTK+ repository.
+  You may even consider making your repository publically available
+  so that others can easily test and review your changes.
+
+* The expected format for git commit messages is as follows:
+
+```
+Short explanation of the commit
+
+Longer explanation explaining exactly what's changed, whether any
+external or private interfaces changed, what bugs were fixed (with bug
+tracker reference if applicable) and so forth. Be concise but not too brief.
+```
+
+  - Always add a brief description of the commit to the _first_ line of
+    the commit and terminate by two newlines (it will work without the
+    second newline, but that is not nice for the interfaces).
+
+  - First line (the brief description) must only be one sentence and
+    should start with a capital letter unless it starts with a lowercase
+    symbol or identifier. Don't use a trailing period either. Don't exceed
+    72 characters.
+
+  - The main description (the body) is normal prose and should use normal
+    punctuation and capital letters where appropriate. Normally, for patches
+    sent to a mailing list it's copied from there.
+
+  - When committing code on behalf of others use the `--author` option, e.g.
+    `git commit -a --author "Joe Coder <joe@coder.org>"` and `--signoff`.
+
+
+Owen Taylor
+13 Aug 1998
+17 Apr 2001
+
+Matthias Clasen
+31 Mar 2009
+
--- a/README.md
+++ b/README.md
@@ -1,23 +1,23 @@
-GTK — The GTK toolkit
-=====================
+GTK+ — The GTK toolkit
+======================

-[![Build status](https://gitlab.gnome.org/GNOME/gtk/badges/master/pipeline.svg)](https://gitlab.gnome.org/GNOME/gtk/-/commits/master)
+[![Build Status](https://gitlab.gnome.org/GNOME/gtk/badges/master/build.svg)](https://gitlab.gnome.org/GNOME/gtk/pipelines)

 General information
 -------------------

-GTK is a multi-platform toolkit for creating graphical user interfaces.
-Offering a complete set of widgets, GTK is suitable for projects ranging
+GTK+ is a multi-platform toolkit for creating graphical user interfaces.
+Offering a complete set of widgets, GTK+ is suitable for projects ranging
 from small one-off projects to complete application suites.

-GTK is free software and part of the GNU Project. However, the
-licensing terms for GTK, the GNU LGPL, allow it to be used by all
+GTK+ is free software and part of the GNU Project. However, the
+licensing terms for GTK+, the GNU LGPL, allow it to be used by all
 developers, including those developing proprietary software, without any
 license fees or royalties.

 The official download location

-  - https://download.gnome.org/sources/gtk/
+  - https://download.gnome.org/sources/gtk+

 The official web site

@@ -27,9 +27,9 @@ The official developers blog

  - https://blog.gtk.org

-Discussion forum
+Information about mailing lists can be found at

-  - https://discourse.gnome.org/c/platform/core/
+  - http://www.gtk.org/mailing-lists.php

 Nightly documentation can be found at
  - Gtk: https://gnome.pages.gitlab.gnome.org/gtk/gtk/
@@ -39,7 +39,7 @@ Nightly documentation can be found at
 Building and installing
 -----------------------

-In order to build GTK you will need:
+In order to build GTK+ you will need:

  - [a C99 compatible compiler](https://wiki.gnome.org/Projects/GLib/CompilerRequirements)
  - [Python 3](https://www.python.org/)
@@ -49,13 +49,14 @@ In order to build GTK you will need:
 You will also need various dependencies, based on the platform you are
 building for:

-  - [GLib](https://download.gnome.org/sources/glib/)
-  - [GdkPixbuf](https://download.gnome.org/sources/gdk-pixbuf/)
-  - [GObject-Introspection](https://download.gnome.org/sources/gobject-introspection/)
-  - [Cairo](https://www.cairographics.org/)
-  - [Pango](https://download.gnome.org/sources/pango/)
+  - [GLib](https://download.gnome.org/sources/glib)
+  - [GdkPixbuf](https://download.gnome.org/sources/gdk-pixbuf)
+  - [GObject-Introspection](https://download.gnome.org/sources/gobject-introspection)
+  - [Cairo](https://www.cairographics.org)
+  - [Pango](https://download.gnome.org/sources/pango)
  - [Epoxy](https://github.com/anholt/libepoxy)
  - [Graphene](https://github.com/ebassi/graphene)
+  - [ATK](https://download.gnome.org/sources/atk)
  - [Xkb-common](https://github.com/xkbcommon/libxkbcommon)

 If you are building the X11 backend, you will also need:
@@ -69,6 +70,7 @@ If you are building the X11 backend, you will also need:
    - xcursor
    - xdamage
    - xcomposite
+  - [atk-bridge-2.0](https://download.gnome.org/sources/at-spi2-atk)

 If you are building the Wayland backend, you will also need:

@@ -77,7 +79,7 @@ If you are building the Wayland backend, you will also need:
  - Wayland-cursor
  - Wayland-EGL

-Once you have all the necessary dependencies, you can build GTK by using
+Once you have all the necessary dependencies, you can build GTK+ by using
 Meson:

 ```sh
@@ -92,13 +94,13 @@ You can run the test suite using:
 $ meson test
 ```

-And, finally, you can install GTK using:
+And, finally, you can install GTK+ using:

 ```
 $ sudo ninja install
 ```

-Complete information about installing GTK and related libraries
+Complete information about installing GTK+ and related libraries
 can be found in the file:

 ```
@@ -116,10 +118,10 @@ In the bug report please include:

 * Information about your system. For instance:

-   - which version of GTK you are using
+   - which version of GTK+ you are using
   - what operating system and version
   - for Linux, which distribution
-   - if you built GTK, the list of options used to configure the build
+   - if you built GTK+, the list of options used to configure the build

  And anything else you think is relevant.

@@ -138,16 +140,10 @@ In the bug report please include:
 * Further information such as stack traces may be useful, but
  is not necessary.

-Contributing to GTK
-------------------
-
-Please, follow the [contribution guide](./CONTRIBUTING.md) to know how to
-start contributing to GTK.
-
 Release notes
 -------------

-The release notes for GTK are part of the migration guide in the API
+The release notes for GTK+ are part of the migration guide in the API
 reference. See:

 - [3.x release notes](https://developer.gnome.org/gtk3/unstable/gtk-migrating-2-to-3.html)
@@ -156,12 +152,8 @@ reference. See:
 Licensing terms
 ---------------

-GTK is released under the terms of the GNU Lesser General Public License,
+GTK+ is released under the terms of the GNU Lesser General Public License,
 version 2.1 or, at your option, any later version, as published by the Free
 Software Foundation.

-Please, see the [`COPYING`](./COPYING) file for further information.
-
-GTK includes a small number of source files under the Apache license:
- A fork of the roaring bitmaps implementation in [gtk/roaring](./gtk/roaring)
- An adaptation of timsort from python in [gtk/timsort](./gtk/timsort)
+Please, see the `COPYING` file for further information.
--- a/build-aux/flatpak/org.gtk.Demo.json
+++ b/build-aux/flatpak/org.gtk.Demo.json
@@ -0,0 +1,74 @@
+{
+    "app-id": "org.gtk.Demo",
+    "runtime": "org.gnome.Platform",
+    "runtime-version": "master",
+    "sdk": "org.gnome.Sdk",
+    "command": "gtk4-demo",
+    "tags": ["devel", "development", "nightly"],
+    "rename-icon": "gtk4-demo",
+    "desktop-file-name-prefix": "(Development) ",
+    "finish-args": [
+        "--device=dri",
+        "--share=ipc",
+        "--socket=x11",
+        "--socket=wayland",
+        "--talk-name=org.gtk.vfs", "--talk-name=org.gtk.vfs.*",
+        "--talk-name=ca.desrt.conf", "--env=DCONF_USER_CONFIG_DIR=.config/dconf"
+    ],
+    "cleanup": [
+        "/include",
+        "/lib/pkgconfig", "/share/pkgconfig",
+        "/share/aclocal",
+        "/man", "/share/man", "/share/gtk-doc",
+        "*.la", ".a",
+        "/lib/girepository-1.0",
+        "/share/gir-1.0",
+        "/share/doc"
+    ],
+    "modules": [
+        {
+            "name" : "wayland",
+            "buildsystem" : "autotools",
+            "builddir" : true,
+            "config-opts" : [
+                "--disable-documentation"
+            ],
+            "sources" : [
+                {
+                    "type" : "git",
+                    "url" : "https://github.com/wayland-project/wayland.git"
+                }
+            ]
+        },
+        {
+            "name": "graphene",
+            "buildsystem": "meson",
+            "builddir": true,
+            "config-opts": [
+                "--libdir=/app/lib",
+                "-Dtests=false",
+                "-Dbenchmarks=false"
+            ],
+            "sources": [
+                {
+                    "type": "git",
+                    "url": "https://github.com/ebassi/graphene.git"
+                }
+            ]
+        },
+        {
+            "name": "gtk",
+            "buildsystem": "meson",
+            "builddir": true,
+            "config-opts": [
+                "--libdir=/app/lib"
+            ],
+            "sources": [
+                {
+                    "type": "git",
+                    "url": "https://gitlab.gnome.org/GNOME/gtk.git"
+                }
+            ]
+        }
+    ]
+}
--- a/build-aux/flatpak/org.gtk.Demo4.json
+++ b/build-aux/flatpak/org.gtk.Demo4.json
@@ -1,118 +0,0 @@
-{
-    "app-id" : "org.gtk.Demo4",
-    "runtime" : "org.gnome.Platform",
-    "runtime-version" : "master",
-    "sdk" : "org.gnome.Sdk",
-    "command" : "gtk4-demo",
-    "tags" : [
-        "devel",
-        "development",
-        "nightly"
-    ],
-    "desktop-file-name-prefix" : "(Development) ",
-    "finish-args" : [
-        "--device=dri",
-        "--share=ipc",
-        "--socket=fallback-x11",
-        "--socket=wayland",
-        "--talk-name=org.gtk.vfs",
-        "--talk-name=org.gtk.vfs.*"
-    ],
-    "cleanup" : [
-        "/include",
-        "/lib/pkgconfig",
-        "/share/pkgconfig",
-        "/share/aclocal",
-        "/man",
-        "/share/man",
-        "/share/gtk-doc",
-        "*.la",
-        ".a",
-        "/lib/girepository-1.0",
-        "/share/gir-1.0",
-        "/share/doc"
-    ],
-    "modules" : [
-        {
-            "name" : "wayland",
-            "buildsystem" : "autotools",
-            "builddir" : true,
-            "config-opts" : [
-                "--disable-documentation"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://github.com/wayland-project/wayland.git"
-                }
-            ]
-        },
-        {
-            "name" : "graphene",
-            "buildsystem" : "meson",
-            "builddir" : true,
-            "config-opts" : [
-                "--libdir=/app/lib",
-                "-Dtests=false",
-                "-Dbenchmarks=false"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://github.com/ebassi/graphene.git"
-                }
-            ]
-        },
-        {
-            "name" : "libsass",
-            "buildsystem" : "meson",
-            "builddir" : true,
-            "config-opts" : [
-                "--libdir=/app/lib"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://github.com/lazka/libsass.git",
-                    "branch" : "meson"
-                }
-            ]
-        },
-        {
-            "name" : "sassc",
-            "buildsystem" : "meson",
-            "builddir" : true,
-            "config-opts" : [
-                "--libdir=/app/lib"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://github.com/lazka/sassc.git",
-                    "branch" : "meson"
-                }
-            ]
-        },
-        {
-            "name" : "gtk",
-            "buildsystem" : "meson",
-            "builddir" : true,
-            "config-opts" : [
-                "--libdir=/app/lib",
-                "-Denable_vulkan=no",
-                "-Dbuildtype=debugoptimized"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://gitlab.gnome.org/GNOME/gtk.git"
-                }
-            ]
-        }
-    ],
-    "build-options" : {
-        "env" : {
-            "GSK_RENDERER" : "opengl"
-        }
-    }
-}
--- a/build-aux/flatpak/org.gtk.IconBrowser4.json
+++ b/build-aux/flatpak/org.gtk.IconBrowser4.json
@@ -1,117 +0,0 @@
-{
-    "app-id" : "org.gtk.IconBrowser4",
-    "runtime" : "org.gnome.Platform",
-    "runtime-version" : "master",
-    "sdk" : "org.gnome.Sdk",
-    "command" : "gtk4-icon-browser",
-    "tags" : [
-        "devel",
-        "development",
-        "nightly"
-    ],
-    "desktop-file-name-prefix" : "(Development) ",
-    "finish-args" : [
-        "--device=dri",
-        "--share=ipc",
-        "--socket=fallback-x11",
-        "--socket=wayland",
-        "--talk-name=org.gtk.vfs",
-        "--talk-name=org.gtk.vfs.*"
-    ],
-    "cleanup" : [
-        "/include",
-        "/lib/pkgconfig",
-        "/share/pkgconfig",
-        "/share/aclocal",
-        "/man",
-        "/share/man",
-        "/share/gtk-doc",
-        "*.la",
-        ".a",
-        "/lib/girepository-1.0",
-        "/share/gir-1.0",
-        "/share/doc"
-    ],
-    "modules" : [
-        {
-            "name" : "wayland",
-            "buildsystem" : "autotools",
-            "builddir" : true,
-            "config-opts" : [
-                "--disable-documentation"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://github.com/wayland-project/wayland.git"
-                }
-            ]
-        },
-        {
-            "name" : "graphene",
-            "buildsystem" : "meson",
-            "builddir" : true,
-            "config-opts" : [
-                "--libdir=/app/lib",
-                "-Dtests=false",
-                "-Dbenchmarks=false"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://github.com/ebassi/graphene.git"
-                }
-            ]
-        },
-        {
-            "name" : "libsass",
-            "buildsystem" : "meson",
-            "builddir" : true,
-            "config-opts" : [
-                "--libdir=/app/lib"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://github.com/lazka/libsass.git",
-                    "branch" : "meson"
-                }
-            ]
-        },
-        {
-            "name" : "sassc",
-            "buildsystem" : "meson",
-            "builddir" : true,
-            "config-opts" : [
-                "--libdir=/app/lib"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://github.com/lazka/sassc.git",
-                    "branch" : "meson"
-                }
-            ]
-        },
-        {
-            "name" : "gtk",
-            "buildsystem" : "meson",
-            "builddir" : true,
-            "config-opts" : [
-                "--libdir=/app/lib",
-                "-Denable_vulkan=no",
-                "-Dbuildtype=debugoptimized"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://gitlab.gnome.org/GNOME/gtk.git"
-                }
-            ]
-        }
-    ],
-    "build-options" : {
-        "env" : {
-        }
-    }
-}
--- a/build-aux/flatpak/org.gtk.WidgetFactory.json
+++ b/build-aux/flatpak/org.gtk.WidgetFactory.json
@@ -0,0 +1,74 @@
+{
+    "app-id": "org.gtk.WidgetFactory",
+    "runtime": "org.gnome.Platform",
+    "runtime-version": "master",
+    "sdk": "org.gnome.Sdk",
+    "command": "gtk4-widget-factory",
+    "tags": ["devel", "development", "nightly"],
+    "rename-icon": "gtk4-widget-factory",
+    "desktop-file-name-prefix": "(Development) ",
+    "finish-args": [
+        "--device=dri",
+        "--share=ipc",
+        "--socket=x11",
+        "--socket=wayland",
+        "--talk-name=org.gtk.vfs", "--talk-name=org.gtk.vfs.*",
+        "--talk-name=ca.desrt.conf", "--env=DCONF_USER_CONFIG_DIR=.config/dconf"
+    ],
+    "cleanup": [
+        "/include",
+        "/lib/pkgconfig", "/share/pkgconfig",
+        "/share/aclocal",
+        "/man", "/share/man", "/share/gtk-doc",
+        "*.la", ".a",
+        "/lib/girepository-1.0",
+        "/share/gir-1.0",
+        "/share/doc"
+    ],
+    "modules": [
+        {
+            "name" : "wayland",
+            "buildsystem" : "autotools",
+            "builddir" : true,
+            "config-opts" : [
+                "--disable-documentation"
+            ],
+            "sources" : [
+                {
+                    "type" : "git",
+                    "url" : "https://github.com/wayland-project/wayland.git"
+                }
+            ]
+        },
+        {
+            "name": "graphene",
+            "buildsystem": "meson",
+            "builddir": true,
+            "config-opts": [
+                "--libdir=/app/lib",
+                "-Dtests=false",
+                "-Dbenchmarks=false"
+            ],
+            "sources": [
+                {
+                    "type": "git",
+                    "url": "https://github.com/ebassi/graphene.git"
+                }
+            ]
+        },
+        {
+            "name": "gtk",
+            "buildsystem": "meson",
+            "builddir": true,
+            "config-opts": [
+                "--libdir=/app/lib"
+            ],
+            "sources": [
+                {
+                    "type": "git",
+                    "url": "https://gitlab.gnome.org/GNOME/gtk.git"
+                }
+            ]
+        }
+    ]
+}
--- a/build-aux/flatpak/org.gtk.WidgetFactory4.json
+++ b/build-aux/flatpak/org.gtk.WidgetFactory4.json
@@ -1,121 +0,0 @@
-{
-    "app-id" : "org.gtk.WidgetFactory4",
-    "runtime" : "org.gnome.Platform",
-    "runtime-version" : "master",
-    "sdk" : "org.gnome.Sdk",
-    "command" : "gtk4-widget-factory",
-    "tags" : [
-        "devel",
-        "development",
-        "nightly"
-    ],
-    "desktop-file-name-prefix" : "(Development) ",
-    "finish-args" : [
-        "--device=dri",
-        "--share=ipc",
-        "--socket=fallback-x11",
-        "--socket=wayland",
-        "--talk-name=org.gtk.vfs",
-        "--talk-name=org.gtk.vfs.*"
-    ],
-    "cleanup" : [
-        "/include",
-        "/lib/pkgconfig",
-        "/share/pkgconfig",
-        "/share/aclocal",
-        "/man",
-        "/share/man",
-        "/share/gtk-doc",
-        "*.la",
-        ".a",
-        "/lib/girepository-1.0",
-        "/share/gir-1.0",
-        "/share/doc"
-    ],
-    "modules" : [
-        {
-            "name" : "wayland",
-            "buildsystem" : "autotools",
-            "builddir" : true,
-            "config-opts" : [
-                "--disable-documentation"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://github.com/wayland-project/wayland.git"
-                }
-            ]
-        },
-        {
-            "name" : "graphene",
-            "buildsystem" : "meson",
-            "builddir" : true,
-            "config-opts" : [
-                "--libdir=/app/lib",
-                "-Dtests=false",
-                "-Dbenchmarks=false"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://github.com/ebassi/graphene.git"
-                }
-            ]
-        },
-        {
-            "name" : "libsass",
-            "buildsystem" : "meson",
-            "builddir" : true,
-            "config-opts" : [
-                "--libdir=/app/lib"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://github.com/lazka/libsass.git",
-                    "branch" : "meson"
-                }
-            ]
-        },
-        {
-            "name" : "sassc",
-            "buildsystem" : "meson",
-            "builddir" : true,
-            "config-opts" : [
-                "--libdir=/app/lib"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://github.com/lazka/sassc.git",
-                    "branch" : "meson"
-                }
-            ]
-        },
-        {
-            "name" : "gtk",
-            "buildsystem" : "meson",
-            "builddir" : true,
-            "config-opts" : [
-                "--libdir=/app/lib",
-                "-Denable_vulkan=no",
-                "-Dbuildtype=debugoptimized"
-            ],
-            "sources" : [
-                {
-                    "type" : "git",
-                    "url" : "https://gitlab.gnome.org/GNOME/gtk.git"
-                }
-            ]
-        }
-    ],
-    "build-options" : {
-        "env" : {
-            "DBUS_SESSION_BUS_ADDRESS" : "''",
-            "GSK_RENDERER" : "opengl",
-            "GDK_DEBUG" : "vulkan-disable",
-            "G_ENABLE_DEBUG" : "true"
-        }
-    }
-}
--- a/build-aux/meson/dist-theme.py
+++ b/build-aux/meson/dist-theme.py
@@ -1,19 +0,0 @@
-#!/usr/bin/env python3
-
-import os
-from pathlib import PurePath
-import subprocess
-
-stylesheets = [ 'gtk/theme/Adwaita/Adwaita.css',
-                'gtk/theme/Adwaita/Adwaita-dark.css',
-                'gtk/theme/HighContrast/HighContrast.css',
-                'gtk/theme/HighContrast/HighContrast-dark.css' ]
-
-sourceroot = os.environ.get('MESON_SOURCE_ROOT')
-distroot = os.environ.get('MESON_DIST_ROOT')
-
-for stylesheet in stylesheets:
-  stylesheet_path = PurePath(stylesheet)
-  src = PurePath(sourceroot, stylesheet_path.with_suffix('.scss'))
-  dst = PurePath(distroot, stylesheet_path)
-  subprocess.call(['sassc', '-a', '-M', '-t', 'compact', src, dst])
--- a/build-aux/meson/post-install.py
+++ b/build-aux/meson/post-install.py
@@ -1,45 +0,0 @@
-#!/usr/bin/env python3
-
-import os
-import sys
-import subprocess
-
-if 'DESTDIR' not in os.environ:
-    gtk_api_version = sys.argv[1]
-    gtk_abi_version = sys.argv[2]
-    gtk_libdir = sys.argv[3]
-    gtk_datadir = sys.argv[4]
-    gtk_bindir = sys.argv[5]
-
-    gtk_moduledir = os.path.join(gtk_libdir, 'gtk-' + gtk_api_version, gtk_abi_version)
-    gtk_printmodule_dir = os.path.join(gtk_moduledir, 'printbackends')
-    gtk_immodule_dir = os.path.join(gtk_moduledir, 'immodules')
-
-    print('Compiling GSettings schemas...')
-    glib_compile_schemas = subprocess.check_output(['pkg-config',
-                                                   '--variable=glib_compile_schemas',
-                                                   'gio-2.0']).strip()
-    if not os.path.exists(glib_compile_schemas):
-        # pkg-config variables only available since GLib 2.62.0.
-        glib_compile_schemas = 'glib-compile-schemas'
-    subprocess.call([glib_compile_schemas,
-                    os.path.join(gtk_datadir, 'glib-2.0', 'schemas')])
-
-    print('Updating icon cache...')
-    update_icon_cache = os.path.join(gtk_bindir, 'gtk4-update-icon-cache')
-    subprocess.call([update_icon_cache, '-q', '-t' ,'-f',
-                    os.path.join(gtk_datadir, 'icons', 'hicolor')])
-
-    print('Updating module cache for print backends...')
-    os.makedirs(gtk_printmodule_dir, exist_ok=True)
-    gio_querymodules = subprocess.check_output(['pkg-config',
-                                                '--variable=gio_querymodules',
-                                                'gio-2.0']).strip()
-    if not os.path.exists(gio_querymodules):
-        # pkg-config variables only available since GLib 2.62.0.
-        gio_querymodules = 'gio-querymodules'
-    subprocess.call([gio_querymodules, gtk_printmodule_dir])
-
-    print('Updating module cache for input methods...')
-    os.makedirs(gtk_immodule_dir, exist_ok=True)
-    subprocess.call([gio_querymodules, gtk_immodule_dir])
--- a/build-aux/meson/post-install.sh
+++ b/build-aux/meson/post-install.sh
@@ -0,0 +1,26 @@
+#!/bin/sh
+
+gtk_api_version=$1
+gtk_abi_version=$2
+gtk_libdir=$3
+gtk_datadir=$4
+
+# Package managers set this so we don't need to run
+if [ -z "$DESTDIR" ]; then
+  echo Compiling GSettings schemas...
+  glib-compile-schemas ${gtk_datadir}/glib-2.0/schemas
+
+  echo Updating desktop database...
+  update-desktop-database -q ${gtk_datadir}/applications
+
+  echo Updating icon cache...
+  gtk-update-icon-cache -q -t -f ${gtk_datadir}/icons/hicolor
+
+  echo Updating module cache for print backends...
+  mkdir -p ${gtk_libdir}/gtk-4.0/4.0.0/printbackends
+  gio-querymodules ${gtk_libdir}/gtk-4.0/4.0.0/printbackends
+
+  echo Updating module cache for input methods...
+  mkdir -p ${gtk_libdir}/gtk-4.0/4.0.0/immodules
+  gio-querymodules ${gtk_libdir}/gtk-4.0/4.0.0/immodules
+fi
--- a/config.h.meson
+++ b/config.h.meson
@@ -1,9 +1,8 @@
+/* config.h.in.  Generated from configure.ac by autoheader.  */
+
 /* always defined to indicate that i18n is enabled */
 #define ENABLE_NLS 1

-/* Use structured logging */
-#define G_LOG_STRUCTURED 1
-
 /* The prefix for our gettext translation domains. */
 #mesondefine GETTEXT_PACKAGE

@@ -25,9 +24,20 @@
 /* Define to 1 if you have the <crt_externs.h> header file. */
 #mesondefine HAVE_CRT_EXTERNS_H

+/* Define to 1 if CUPS 1.6 API is available */
+#mesondefine HAVE_CUPS_API_1_6
+
 /* Define to 1 if you have the `dcgettext' function. */
 #mesondefine HAVE_DCGETTEXT

+/* Define to 1 if you have the declaration of `isinf', and to 0 if you don't.
+   */
+#mesondefine HAVE_DECL_ISINF
+
+/* Define to 1 if you have the declaration of `isnan', and to 0 if you don't.
+   */
+#mesondefine HAVE_DECL_ISNAN
+
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #mesondefine HAVE_DLFCN_H

@@ -49,6 +59,12 @@
 /* Define if GStreamer support is available */
 #mesondefine HAVE_GSTREAMER

+/* Define to 1 if you have the `httpGetAuthString' function. */
+#mesondefine HAVE_HTTPGETAUTHSTRING
+
+/* Define if cups http_t authstring field is accessible */
+#mesondefine HAVE_HTTP_AUTHSTRING
+
 /* Define to 1 if you have the <inttypes.h> header file. */
 #mesondefine HAVE_INTTYPES_H

@@ -70,12 +86,12 @@
 /* Define to 1 if you have the `mkstemp' function. */
 #mesondefine HAVE_MKSTEMP

-/* Define to 1 if you have the `mlock` function. */
-#mesondefine HAVE_MLOCK
-
 /* Define to 1 if you have a working `mmap' system call. */
 #mesondefine HAVE_MMAP

+/* Define to 1 if you have the `nearbyint' function. */
+#mesondefine HAVE_NEARBYINT
+
 /* Define to 1 if you have the `posix_fallocate' function. */
 #mesondefine HAVE_POSIX_FALLOCATE

@@ -85,9 +101,21 @@
 /* Have the Xrandr 1.5 extension library */
 #mesondefine HAVE_RANDR15

+/* Define to 1 if you have the `rint' function. */
+#mesondefine HAVE_RINT
+
+/* Define to 1 if you have the `round' function. */
+#mesondefine HAVE_ROUND
+
 /* Define to 1 if you have the `sincos' function. */
 #mesondefine HAVE_SINCOS

+/* Define to 1 if you have the `log2` function */
+#mesondefine HAVE_LOG2
+
+/* Define to 1 if you ahve the `exp2` function */
+#mesondefine HAVE_EXP2
+
 /* Define to 1 if you have the <stdint.h> header file. */
 #mesondefine HAVE_STDINT_H

@@ -106,9 +134,6 @@
 /* Define to 1 if you have the <sys/param.h> header file. */
 #mesondefine HAVE_SYS_PARAM_H

-/* Have the sysprof-capture library */
-#mesondefine HAVE_SYSPROF
-
 /* Define to 1 if you have the <sys/stat.h> header file. */
 #mesondefine HAVE_SYS_STAT_H

@@ -166,6 +191,9 @@
 /* Define to the sub-directory where libtool stores uninstalled libraries. */
 #mesondefine LT_OBJDIR

+/* Define if <X11/extensions/XIproto.h> needed for xReply */
+#mesondefine NEED_XIPROTO_H_FOR_XREPLY
+
 /* Define to 1 if your C compiler doesn't accept -c and -o together. */
 #mesondefine NO_MINUS_C_MINUS_O

@@ -216,6 +244,9 @@
 #endif


+/* Define to 1 if XInput 2.0 is available */
+#mesondefine XINPUT_2
+
 /* Define to 1 if XInput 2.2 is available */
 #mesondefine XINPUT_2_2

@@ -269,13 +300,18 @@

 #mesondefine GTK_PRINT_BACKENDS

-#mesondefine HAVE_CAIRO_SCRIPT_INTERPRETER
-
 #mesondefine HAVE_HARFBUZZ

 #mesondefine HAVE_PANGOFT

 #mesondefine ISO_CODES_PREFIX

-/* Define if tracker3 is available */
-#mesondefine HAVE_TRACKER3
+#mesondefine MALLOC_IS_ALIGNED16
+
+#mesondefine HAVE_POSIX_MEMALIGN
+
+#mesondefine HAVE_MEMALIGN
+
+#mesondefine HAVE_ALIGNED_ALLOC
+
+#mesondefine HAVE__ALIGNED_MALLOC
--- a/demos/constraint-editor/constraint-editor-application.c
+++ b/demos/constraint-editor/constraint-editor-application.c
@@ -1,115 +0,0 @@
-/*
- * Copyright © 2019 Red Hat, Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library. If not, see <http://www.gnu.org/licenses/>.
- *
- * Authors: Matthias Clasen
- */
-
-#include "config.h"
-
-#include "constraint-editor-application.h"
-#include "constraint-editor-window.h"
-
-struct _ConstraintEditorApplication
-{
-  GtkApplication parent_instance;
-};
-
-G_DEFINE_TYPE(ConstraintEditorApplication, constraint_editor_application, GTK_TYPE_APPLICATION);
-
-static void
-constraint_editor_application_init (ConstraintEditorApplication *app)
-{
-}
-
-static void
-quit_activated (GSimpleAction *action,
-                GVariant      *parameter,
-                gpointer       data)
-{
-  g_application_quit (G_APPLICATION (data));
-}
-
-static GActionEntry app_entries[] =
-{
-  { "quit", quit_activated, NULL, NULL, NULL }
-};
-
-static void
-constraint_editor_application_startup (GApplication *app)
-{
-  const char *quit_accels[2] = { "<Ctrl>Q", NULL };
-  const char *open_accels[2] = { "<Ctrl>O", NULL };
-  GtkCssProvider *provider;
-
-  G_APPLICATION_CLASS (constraint_editor_application_parent_class)->startup (app);
-
-  g_action_map_add_action_entries (G_ACTION_MAP (app),
-                                   app_entries, G_N_ELEMENTS (app_entries),
-                                   app);
-  gtk_application_set_accels_for_action (GTK_APPLICATION (app), "app.quit", quit_accels);
-  gtk_application_set_accels_for_action (GTK_APPLICATION (app), "win.open", open_accels);
-
-  provider = gtk_css_provider_new ();
-  gtk_css_provider_load_from_resource (provider, "/org/gtk/gtk4/constraint-editor/constraint-editor.css");
-  gtk_style_context_add_provider_for_display (gdk_display_get_default (),
-                                              GTK_STYLE_PROVIDER (provider),
-                                              GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
-}
-
-static void
-constraint_editor_application_activate (GApplication *app)
-{
-  ConstraintEditorWindow *win;
-
-  win = constraint_editor_window_new (CONSTRAINT_EDITOR_APPLICATION (app));
-  gtk_window_present (GTK_WINDOW (win));
-}
-
-static void
-constraint_editor_application_open (GApplication  *app,
-                                    GFile        **files,
-                                    int            n_files,
-                                    const char    *hint)
-{
-  ConstraintEditorWindow *win;
-  int i;
-
-  for (i = 0; i < n_files; i++)
-    {
-      win = constraint_editor_window_new (CONSTRAINT_EDITOR_APPLICATION (app));
-      constraint_editor_window_load (win, files[i]);
-      gtk_window_present (GTK_WINDOW (win));
-    }
-}
-
-static void
-constraint_editor_application_class_init (ConstraintEditorApplicationClass *class)
-{
-  GApplicationClass *application_class = G_APPLICATION_CLASS (class);
-
-  application_class->startup = constraint_editor_application_startup;
-  application_class->activate = constraint_editor_application_activate;
-  application_class->open = constraint_editor_application_open;
-}
-
-ConstraintEditorApplication *
-constraint_editor_application_new (void)
-{
-  return g_object_new (CONSTRAINT_EDITOR_APPLICATION_TYPE,
-                       "application-id", "org.gtk.gtk4.ConstraintEditor",
-                       "flags", G_APPLICATION_HANDLES_OPEN,
-                       NULL);
-}
--- a/demos/constraint-editor/constraint-editor-application.h
+++ b/demos/constraint-editor/constraint-editor-application.h
@@ -1,28 +0,0 @@
-/*
- * Copyright © 2019 Red Hat, Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library. If not, see <http://www.gnu.org/licenses/>.
- *
- * Authors: Matthias Clasen
- */
-
-#pragma once
-
-#include <gtk/gtk.h>
-
-#define CONSTRAINT_EDITOR_APPLICATION_TYPE (constraint_editor_application_get_type ())
-
-G_DECLARE_FINAL_TYPE (ConstraintEditorApplication, constraint_editor_application, CONSTRAINT, EDITOR_APPLICATION, GtkApplication)
-
-ConstraintEditorApplication *constraint_editor_application_new (void);
--- a/demos/constraint-editor/constraint-editor-window.c
+++ b/demos/constraint-editor/constraint-editor-window.c
@@ -1,664 +0,0 @@
-/*
- * Copyright © 2019 Red Hat, Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library. If not, see <http://www.gnu.org/licenses/>.
- *
- * Authors: Matthias Clasen
- */
-
-#include "config.h"
-
-#include "constraint-editor-window.h"
-#include "constraint-view.h"
-#include "constraint-editor.h"
-#include "guide-editor.h"
-
-struct _ConstraintEditorWindow
-{
-  GtkApplicationWindow parent_instance;
-
-  GtkWidget *paned;
-  GtkWidget *view;
-  GtkWidget *list;
-};
-
-G_DEFINE_TYPE(ConstraintEditorWindow, constraint_editor_window, GTK_TYPE_APPLICATION_WINDOW);
-
-static GtkConstraintTarget *
-find_target (GListModel          *model,
-             GtkConstraintTarget *orig)
-{
-  const char *name;
-  const char *model_name;
-  gpointer item;
-  int i;
-
-  if (orig == NULL)
-    return NULL;
-
-  if (GTK_IS_LABEL (orig))
-    name = gtk_label_get_label (GTK_LABEL (orig));
-  else if (GTK_IS_CONSTRAINT_GUIDE (orig))
-    name = gtk_constraint_guide_get_name (GTK_CONSTRAINT_GUIDE (orig));
-  else
-    {
-      g_warning ("Don't know how to handle %s targets", G_OBJECT_TYPE_NAME (orig));
-      return NULL;
-    }
-  for (i = 0; i < g_list_model_get_n_items (model); i++)
-    {
-      item = g_list_model_get_item (model, i);
-      g_object_unref (item);
-      if (GTK_IS_WIDGET (item))
-        model_name = gtk_widget_get_name (GTK_WIDGET (item));
-      else
-        model_name = gtk_constraint_guide_get_name (GTK_CONSTRAINT_GUIDE (item));
-
-      if (strcmp (name, model_name) == 0)
-        return GTK_CONSTRAINT_TARGET (item);
-    }
-  g_warning ("Failed to find target '%s'", name);
-
-  return NULL;
-}
-
-gboolean
-constraint_editor_window_load (ConstraintEditorWindow *self,
-                               GFile            *file)
-{
-  char *path;
-  GtkBuilder *builder;
-  GError *error = NULL;
-  GtkWidget *view;
-  GtkLayoutManager *layout;
-  GtkWidget *child;
-  const char *name;
-  gpointer item;
-  int i;
-  GListModel *list;
-
-  path = g_file_get_path (file);
-
-  builder = gtk_builder_new ();
-  if (!gtk_builder_add_from_file (builder, path, &error))
-    {
-      g_print ("Could not load %s: %s", path, error->message);
-      g_error_free (error);
-      g_free (path);
-      g_object_unref (builder);
-      return FALSE;
-    }
-
-  view = GTK_WIDGET (gtk_builder_get_object (builder, "view"));
-  if (!GTK_IS_BOX (view))
-    {
-      g_print ("Could not load %s: No GtkBox named 'view'", path);
-      g_free (path);
-      g_object_unref (builder);
-      return FALSE;
-    }
-  layout = gtk_widget_get_layout_manager (view);
-  if (!GTK_IS_CONSTRAINT_LAYOUT (layout))
-    {
-      g_print ("Could not load %s: Widget 'view' does not use GtkConstraintLayout", path);
-      g_free (path);
-      g_object_unref (builder);
-      return FALSE;
-    }
-
-  for (child = gtk_widget_get_first_child (view);
-       child;
-       child = gtk_widget_get_next_sibling (child))
-    {
-      if (!GTK_IS_LABEL (child))
-        {
-          g_print ("Skipping non-GtkLabel child\n");
-          continue;
-        }
-
-      name = gtk_label_get_label (GTK_LABEL (child));
-      constraint_view_add_child (CONSTRAINT_VIEW (self->view), name);
-    }
-
-  list = gtk_constraint_layout_observe_guides (GTK_CONSTRAINT_LAYOUT (layout));
-  for (i = 0; i < g_list_model_get_n_items (list); i++)
-    {
-      GtkConstraintGuide *guide, *clone;
-      int w, h;
-
-      item = g_list_model_get_item (list, i);
-      guide = GTK_CONSTRAINT_GUIDE (item);
-
-      /* need to clone here, to attach to the right targets */
-      clone = gtk_constraint_guide_new ();
-      gtk_constraint_guide_set_name (clone, gtk_constraint_guide_get_name (guide));
-      gtk_constraint_guide_set_strength (clone, gtk_constraint_guide_get_strength (guide));
-      gtk_constraint_guide_get_min_size (guide, &w, &h);
-      gtk_constraint_guide_set_min_size (clone, w, h);
-      gtk_constraint_guide_get_nat_size (guide, &w, &h);
-      gtk_constraint_guide_set_nat_size (clone, w, h);
-      gtk_constraint_guide_get_max_size (guide, &w, &h);
-      gtk_constraint_guide_set_max_size (clone, w, h);
-      constraint_view_add_guide (CONSTRAINT_VIEW (self->view), clone);
-      g_object_unref (guide);
-      g_object_unref (clone);
-    }
-  g_object_unref (list);
-
-  list = gtk_constraint_layout_observe_constraints (GTK_CONSTRAINT_LAYOUT (layout));
-  for (i = 0; i < g_list_model_get_n_items (list); i++)
-    {
-      GtkConstraint *constraint;
-      GtkConstraint *clone;
-      GtkConstraintTarget *target;
-      GtkConstraintTarget *source;
-      GtkConstraintAttribute source_attr;
-
-      item = g_list_model_get_item (list, i);
-      constraint = GTK_CONSTRAINT (item);
-
-      target = gtk_constraint_get_target (constraint);
-      source = gtk_constraint_get_source (constraint);
-      source_attr = gtk_constraint_get_source_attribute (constraint);
-
-      if (source == NULL && source_attr == GTK_CONSTRAINT_ATTRIBUTE_NONE)
-        clone = gtk_constraint_new_constant (find_target (constraint_view_get_model (CONSTRAINT_VIEW (self->view)), target),
-                                  gtk_constraint_get_target_attribute (constraint),
-                                  gtk_constraint_get_relation (constraint),
-                                  gtk_constraint_get_constant (constraint),
-                                  gtk_constraint_get_strength (constraint));
-      else
-        clone = gtk_constraint_new (find_target (constraint_view_get_model (CONSTRAINT_VIEW (self->view)), target),
-                                    gtk_constraint_get_target_attribute (constraint),
-                                    gtk_constraint_get_relation (constraint),
-                                    find_target (constraint_view_get_model (CONSTRAINT_VIEW (self->view)), source),
-                                    source_attr,
-                                    gtk_constraint_get_multiplier (constraint),
-                                    gtk_constraint_get_constant (constraint),
-                                    gtk_constraint_get_strength (constraint));
-
-      constraint_view_add_constraint (CONSTRAINT_VIEW (self->view), clone);
-
-      g_object_unref (constraint);
-      g_object_unref (clone);
-    }
-  g_object_unref (list);
-
-  g_free (path);
-  g_object_unref (builder);
-
-  return TRUE;
-}
-
-static void
-open_response_cb (GtkNativeDialog        *dialog,
-                  int                     response,
-                  ConstraintEditorWindow *self)
-{
-  gtk_native_dialog_hide (dialog);
-
-  if (response == GTK_RESPONSE_ACCEPT)
-    {
-      GFile *file;
-
-      file = gtk_file_chooser_get_file (GTK_FILE_CHOOSER (dialog));
-      constraint_editor_window_load (self, file);
-      g_object_unref (file);
-    }
-
-  gtk_native_dialog_destroy (dialog);
-}
-
-static void
-open_cb (GtkWidget              *button,
-         ConstraintEditorWindow *self)
-{
-  GtkFileChooserNative *dialog;
-
-  dialog = gtk_file_chooser_native_new ("Open file",
-                                        GTK_WINDOW (self),
-                                        GTK_FILE_CHOOSER_ACTION_OPEN,
-                                        "_Load",
-                                        "_Cancel");
-  gtk_native_dialog_set_modal (GTK_NATIVE_DIALOG (dialog), TRUE);
-
-  GFile *cwd = g_file_new_for_path (".");
-  gtk_file_chooser_set_current_folder (GTK_FILE_CHOOSER (dialog), cwd, NULL);
-  g_object_unref (cwd);
-
-  g_signal_connect (dialog, "response", G_CALLBACK (open_response_cb), self);
-  gtk_native_dialog_show (GTK_NATIVE_DIALOG (dialog));
-}
-
-static void
-serialize_child (GString   *str,
-                 int        indent,
-                 GtkWidget *child)
-{
-  const char *name;
-
-  name = gtk_widget_get_name (child);
-  g_string_append_printf (str, "%*s<child>\n", indent, "");
-  g_string_append_printf (str, "%*s  <object class=\"GtkLabel\" id=\"%s\">\n", indent, "", name);
-  g_string_append_printf (str, "%*s    <property name=\"label\">%s</property>\n", indent, "", name);
-  g_string_append_printf (str, "%*s  </object>\n", indent, "");
-  g_string_append_printf (str, "%*s</child>\n", indent, "");
-}
-
-static char *
-serialize_model (GListModel *list)
-{
-  GString *str = g_string_new ("");
-  int i;
-
-  g_string_append (str, "<interface>\n");
-  g_string_append (str, "  <object class=\"GtkBox\" id=\"view\">\n");
-  g_string_append (str, "    <property name=\"layout-manager\">\n");
-  g_string_append (str, "      <object class=\"GtkConstraintLayout\">\n");
-  g_string_append (str, "        <constraints>\n");
-  for (i = 0; i < g_list_model_get_n_items (list); i++)
-    {
-      gpointer item = g_list_model_get_item (list, i);
-      g_object_unref (item);
-      if (GTK_IS_CONSTRAINT (item))
-        constraint_editor_serialize_constraint (str, 10, GTK_CONSTRAINT (item));
-      else if (GTK_IS_CONSTRAINT_GUIDE (item))
-        guide_editor_serialize_guide (str, 10, GTK_CONSTRAINT_GUIDE (item));
-    }
-  g_string_append (str, "        </constraints>\n");
-  g_string_append (str, "      </object>\n");
-  g_string_append (str, "    </property>\n");
-  for (i = 0; i < g_list_model_get_n_items (list); i++)
-    {
-      gpointer item = g_list_model_get_item (list, i);
-      g_object_unref (item);
-      if (GTK_IS_WIDGET (item))
-        serialize_child (str, 4, GTK_WIDGET (item));
-    }
-  g_string_append (str, "  </object>\n");
-  g_string_append (str, "</interface>\n");
-
-  return g_string_free (str, FALSE);
-}
-
-
-static void
-save_response_cb (GtkNativeDialog        *dialog,
-                  int                     response,
-                  ConstraintEditorWindow *self)
-{
-  gtk_native_dialog_hide (dialog);
-
-  if (response == GTK_RESPONSE_ACCEPT)
-    {
-      GListModel *model;
-      GFile *file;
-      char *text;
-      GError *error = NULL;
-
-      model = constraint_view_get_model (CONSTRAINT_VIEW (self->view));
-      text = serialize_model (model);
-      file = gtk_file_chooser_get_file (GTK_FILE_CHOOSER (dialog));
-      g_file_replace_contents (file, text, strlen (text),
-                               NULL, FALSE,
-                               G_FILE_CREATE_NONE,
-                               NULL,
-                               NULL,
-                               &error);
-      if (error != NULL)
-        {
-          GtkWidget *message_dialog;
-
-          message_dialog = gtk_message_dialog_new (GTK_WINDOW (gtk_widget_get_root (GTK_WIDGET (self))),
-                                                   GTK_DIALOG_MODAL|GTK_DIALOG_DESTROY_WITH_PARENT,
-                                                   GTK_MESSAGE_INFO,
-                                                   GTK_BUTTONS_OK,
-                                                   "Saving failed");
-          gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (message_dialog),
-                                                    "%s", error->message);
-          g_signal_connect (message_dialog, "response", G_CALLBACK (gtk_window_destroy), NULL);
-          gtk_widget_show (message_dialog);
-          g_error_free (error);
-        }
-
-      g_free (text);
-      g_object_unref (file);
-    }
-
-  gtk_native_dialog_destroy (dialog);
-}
-
-static void
-save_cb (GtkWidget              *button,
-         ConstraintEditorWindow *self)
-{
-  GtkFileChooserNative *dialog;
-
-  dialog = gtk_file_chooser_native_new ("Save constraints",
-                                        GTK_WINDOW (gtk_widget_get_root (GTK_WIDGET (button))),
-                                        GTK_FILE_CHOOSER_ACTION_SAVE,
-                                        "_Save",
-                                        "_Cancel");
-  gtk_native_dialog_set_modal (GTK_NATIVE_DIALOG (dialog), TRUE);
-
-  GFile *cwd = g_file_new_for_path (".");
-  gtk_file_chooser_set_current_folder (GTK_FILE_CHOOSER (dialog), cwd, NULL);
-  g_object_unref (cwd);
-
-  g_signal_connect (dialog, "response", G_CALLBACK (save_response_cb), self);
-  gtk_native_dialog_show (GTK_NATIVE_DIALOG (dialog));
-}
-
-static void
-constraint_editor_window_finalize (GObject *object)
-{
-  //ConstraintEditorWindow *self = (ConstraintEditorWindow *)object;
-
-  G_OBJECT_CLASS (constraint_editor_window_parent_class)->finalize (object);
-}
-
-static int child_counter;
-static int guide_counter;
-
-static void
-add_child (ConstraintEditorWindow *win)
-{
-  char *name;
-
-  child_counter++;
-  name = g_strdup_printf ("Child %d", child_counter);
-  constraint_view_add_child (CONSTRAINT_VIEW (win->view), name);
-  g_free (name);
-}
-
-static void
-add_guide (ConstraintEditorWindow *win)
-{
-  char *name;
-  GtkConstraintGuide *guide;
-
-  guide_counter++;
-  name = g_strdup_printf ("Guide %d", guide_counter);
-  guide = gtk_constraint_guide_new ();
-  gtk_constraint_guide_set_name (guide, name);
-  g_free (name);
-
-  constraint_view_add_guide (CONSTRAINT_VIEW (win->view), guide);
-}
-
-static void
-constraint_editor_done (ConstraintEditor *editor,
-                        GtkConstraint    *constraint,
-                        ConstraintEditorWindow *win)
-{
-  GtkConstraint *old_constraint;
-
-  g_object_get (editor, "constraint", &old_constraint, NULL);
-
-  if (old_constraint)
-    constraint_view_remove_constraint (CONSTRAINT_VIEW (win->view), old_constraint);
-
-  constraint_view_add_constraint (CONSTRAINT_VIEW (win->view), constraint);
-
-  g_clear_object (&old_constraint);
-
-  gtk_window_destroy (GTK_WINDOW (gtk_widget_get_ancestor (GTK_WIDGET (editor), GTK_TYPE_WINDOW)));
-}
-
-static void
-edit_constraint (ConstraintEditorWindow *win,
-                 GtkConstraint          *constraint)
-{
-  GtkWidget *window;
-  ConstraintEditor *editor;
-  GListModel *model;
-
-  window = gtk_window_new ();
-  gtk_window_set_transient_for (GTK_WINDOW (window), GTK_WINDOW (win));
-  gtk_window_set_resizable (GTK_WINDOW (window), FALSE);
-  if (constraint)
-    gtk_window_set_title (GTK_WINDOW (window), "Edit Constraint");
-  else
-    gtk_window_set_title (GTK_WINDOW (window), "Create Constraint");
-
-  model = constraint_view_get_model (CONSTRAINT_VIEW (win->view));
-
-  editor = constraint_editor_new (model, constraint);
-
-  gtk_window_set_child (GTK_WINDOW (window), GTK_WIDGET (editor));
-
-  g_signal_connect (editor, "done", G_CALLBACK (constraint_editor_done), win);
-
-  gtk_widget_show (window);
-}
-
-static void
-add_constraint (ConstraintEditorWindow *win)
-{
-  edit_constraint (win, NULL);
-}
-
-static void
-guide_editor_done (GuideEditor            *editor,
-                   GtkConstraintGuide     *guide,
-                   ConstraintEditorWindow *win)
-{
-  gtk_window_destroy (GTK_WINDOW (gtk_widget_get_ancestor (GTK_WIDGET (editor), GTK_TYPE_WINDOW)));
-}
-
-static void
-edit_guide (ConstraintEditorWindow *win,
-            GtkConstraintGuide     *guide)
-{
-  GtkWidget *window;
-  GuideEditor *editor;
-
-  window = gtk_window_new ();
-  gtk_window_set_resizable (GTK_WINDOW (window), FALSE);
-  gtk_window_set_transient_for (GTK_WINDOW (window), GTK_WINDOW (win));
-  gtk_window_set_title (GTK_WINDOW (window), "Edit Guide");
-
-  editor = guide_editor_new (guide);
-  gtk_window_set_child (GTK_WINDOW (window), GTK_WIDGET (editor));
-
-  g_signal_connect (editor, "done", G_CALLBACK (guide_editor_done), win);
-  gtk_widget_show (window);
-}
-
-static void
-row_activated (GtkListBox *list,
-               GtkListBoxRow *row,
-               ConstraintEditorWindow *win)
-{
-  GObject *item;
-
-  item = G_OBJECT (g_object_get_data (G_OBJECT (row), "item"));
-
-  if (GTK_IS_CONSTRAINT (item))
-    edit_constraint (win, GTK_CONSTRAINT (item));
-  else if (GTK_IS_CONSTRAINT_GUIDE (item))
-    edit_guide (win, GTK_CONSTRAINT_GUIDE (item));
-}
-
-static void
-constraint_editor_window_class_init (ConstraintEditorWindowClass *class)
-{
-  GObjectClass *object_class = G_OBJECT_CLASS (class);
-  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
-
-  object_class->finalize = constraint_editor_window_finalize;
-
-  gtk_widget_class_set_template_from_resource (widget_class,
-                                               "/org/gtk/gtk4/constraint-editor/constraint-editor-window.ui");
-
-  gtk_widget_class_bind_template_child (widget_class, ConstraintEditorWindow, paned);
-  gtk_widget_class_bind_template_child (widget_class, ConstraintEditorWindow, view);
-  gtk_widget_class_bind_template_child (widget_class, ConstraintEditorWindow, list);
-
-  gtk_widget_class_bind_template_callback (widget_class, open_cb);
-  gtk_widget_class_bind_template_callback (widget_class, save_cb);
-  gtk_widget_class_bind_template_callback (widget_class, add_child);
-  gtk_widget_class_bind_template_callback (widget_class, add_guide);
-  gtk_widget_class_bind_template_callback (widget_class, add_constraint);
-  gtk_widget_class_bind_template_callback (widget_class, row_activated);
-}
-
-static void
-row_edit (GtkButton *button,
-          ConstraintEditorWindow *win)
-{
-  GtkWidget *row;
-  GObject *item;
-
-  row = gtk_widget_get_ancestor (GTK_WIDGET (button), GTK_TYPE_LIST_BOX_ROW);
-  item = (GObject *)g_object_get_data (G_OBJECT (row), "item");
-  if (GTK_IS_CONSTRAINT (item))
-    edit_constraint (win, GTK_CONSTRAINT (item));
-  else if (GTK_IS_CONSTRAINT_GUIDE (item))
-    edit_guide (win, GTK_CONSTRAINT_GUIDE (item));
-}
-
-static void
-mark_constraints_invalid (ConstraintEditorWindow *win,
-                          gpointer                removed)
-{
-  GtkWidget *child;
-  GObject *item;
-
-  for (child = gtk_widget_get_first_child (win->list);
-       child;
-       child = gtk_widget_get_next_sibling (child))
-    {
-      item = (GObject *)g_object_get_data (G_OBJECT (child), "item");
-      if (GTK_IS_CONSTRAINT (item))
-        {
-          GtkConstraint *constraint = GTK_CONSTRAINT (item);
-
-          if (gtk_constraint_get_target (constraint) == (GtkConstraintTarget *)removed ||
-              gtk_constraint_get_source (constraint) == (GtkConstraintTarget *)removed)
-            {
-              GtkWidget *button;
-              button = (GtkWidget *)g_object_get_data (G_OBJECT (child), "edit");
-              gtk_button_set_icon_name (GTK_BUTTON (button), "dialog-warning-symbolic");
-              gtk_widget_set_tooltip_text (button, "Constraint is invalid");
-            }
-        }
-    }
-}
-
-static void
-row_delete (GtkButton *button,
-            ConstraintEditorWindow *win)
-{
-  GtkWidget *row;
-  GObject *item;
-
-  row = gtk_widget_get_ancestor (GTK_WIDGET (button), GTK_TYPE_LIST_BOX_ROW);
-  item = (GObject *)g_object_get_data (G_OBJECT (row), "item");
-  if (GTK_IS_CONSTRAINT (item))
-    constraint_view_remove_constraint (CONSTRAINT_VIEW (win->view),
-                                       GTK_CONSTRAINT (item));
-  else if (GTK_IS_CONSTRAINT_GUIDE (item))
-    {
-      mark_constraints_invalid (win, item);
-      constraint_view_remove_guide (CONSTRAINT_VIEW (win->view),
-                                    GTK_CONSTRAINT_GUIDE (item));
-    }
-  else if (GTK_IS_WIDGET (item))
-    {
-      mark_constraints_invalid (win, item);
-      constraint_view_remove_child (CONSTRAINT_VIEW (win->view),
-                                    GTK_WIDGET (item));
-    }
-}
-
-static GtkWidget *
-create_widget_func (gpointer item,
-                    gpointer user_data)
-{
-  ConstraintEditorWindow *win = user_data;
-  const char *name;
-  char *freeme = NULL;
-  GtkWidget *row, *box, *label, *button;
-
-  if (GTK_IS_WIDGET (item))
-    name = gtk_widget_get_name (GTK_WIDGET (item));
-  else if (GTK_IS_CONSTRAINT_GUIDE (item))
-    name = gtk_constraint_guide_get_name (GTK_CONSTRAINT_GUIDE (item));
-  else if (GTK_IS_CONSTRAINT (item))
-    name = freeme = constraint_editor_constraint_to_string (GTK_CONSTRAINT (item));
-  else
-    name = "";
-
-  row = gtk_list_box_row_new ();
-  g_object_set_data_full (G_OBJECT (row), "item", g_object_ref (item), g_object_unref);
-  box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
-  label = gtk_label_new (name);
-  if (GTK_IS_WIDGET (item) || GTK_IS_CONSTRAINT_GUIDE (item))
-    g_object_bind_property (item, "name",
-                            label, "label",
-                            G_BINDING_DEFAULT);
-  gtk_widget_set_margin_start (label, 10);
-  gtk_widget_set_margin_end (label, 10);
-  gtk_widget_set_margin_top (label, 10);
-  gtk_widget_set_margin_bottom (label, 10);
-  gtk_label_set_xalign (GTK_LABEL (label), 0.0);
-  gtk_widget_set_hexpand (label, TRUE);
-  gtk_list_box_row_set_child (GTK_LIST_BOX_ROW (row), box);
-  gtk_box_append (GTK_BOX (box), label);
-
-  if (GTK_IS_CONSTRAINT (item) || GTK_IS_CONSTRAINT_GUIDE (item))
-    {
-      button = gtk_button_new_from_icon_name ("document-edit-symbolic");
-      gtk_button_set_has_frame (GTK_BUTTON (button), FALSE);
-      g_signal_connect (button, "clicked", G_CALLBACK (row_edit), win);
-      g_object_set_data (G_OBJECT (row), "edit", button);
-      gtk_box_append (GTK_BOX (box), button);
-      button = gtk_button_new_from_icon_name ("edit-delete-symbolic");
-      gtk_button_set_has_frame (GTK_BUTTON (button), FALSE);
-      g_signal_connect (button, "clicked", G_CALLBACK (row_delete), win);
-      gtk_box_append (GTK_BOX (box), button);
-    }
-  else if (GTK_IS_WIDGET (item))
-    {
-      button = gtk_button_new_from_icon_name ("edit-delete-symbolic");
-      gtk_button_set_has_frame (GTK_BUTTON (button), FALSE);
-      g_signal_connect (button, "clicked", G_CALLBACK (row_delete), win);
-      gtk_box_append (GTK_BOX (box), button);
-    }
-
-  g_free (freeme);
-
-  return row;
-}
-
-static void
-constraint_editor_window_init (ConstraintEditorWindow *self)
-{
-  gtk_widget_init_template (GTK_WIDGET (self));
-
-  gtk_list_box_bind_model (GTK_LIST_BOX (self->list),
-                           constraint_view_get_model (CONSTRAINT_VIEW (self->view)),
-                           create_widget_func,
-                           self,
-                           NULL);
-}
-
-ConstraintEditorWindow *
-constraint_editor_window_new (ConstraintEditorApplication *application)
-{
-  return g_object_new (CONSTRAINT_EDITOR_WINDOW_TYPE,
-                       "application", application,
-                       NULL);
-}
--- a/demos/constraint-editor/constraint-editor-window.h
+++ b/demos/constraint-editor/constraint-editor-window.h
@@ -1,34 +0,0 @@
-/*
- * Copyright © 2019 Red Hat, Inc
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library. If not, see <http://www.gnu.org/licenses/>.
- *
- * Authors: Matthias Clasen
- */
-
-#pragma once
-
-#include <gtk/gtk.h>
-
-#include "constraint-editor-application.h"
-
-
-#define CONSTRAINT_EDITOR_WINDOW_TYPE (constraint_editor_window_get_type ())
-
-G_DECLARE_FINAL_TYPE (ConstraintEditorWindow, constraint_editor_window, CONSTRAINT, EDITOR_WINDOW, GtkApplicationWindow)
-
-ConstraintEditorWindow * constraint_editor_window_new  (ConstraintEditorApplication  *application);
-
-gboolean                 constraint_editor_window_load (ConstraintEditorWindow       *self,
-                                                        GFile                        *file);
--- a/demos/constraint-editor/constraint-editor-window.ui
+++ b/demos/constraint-editor/constraint-editor-window.ui
@@ -1,77 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<interface>
-  <template class="ConstraintEditorWindow" parent="GtkApplicationWindow">
-    <property name="title" translatable="yes">GTK Constraint Editor</property>
-    <property name="default-width">1024</property>
-    <property name="default-height">768</property>
-    <child type="titlebar">
-      <object class="GtkHeaderBar" id="header">
-        <child type="start">
-          <object class="GtkButton">
-            <property name="icon-name">document-open-symbolic</property>
-            <property name="tooltip-text">Open ui file</property>
-            <signal name="clicked" handler="open_cb"/>
-          </object>
-        </child>
-        <child type="start">
-          <object class="GtkButton">
-            <property name="icon-name">document-save-symbolic</property>
-            <property name="tooltip-text">Save to ui file</property>
-            <signal name="clicked" handler="save_cb"/>
-          </object>
-        </child>
-      </object>
-    </child>
-    <child>
-      <object class="GtkPaned" id="paned">
-        <property name="orientation">horizontal</property>
-        <child>
-          <object class="GtkBox">
-            <property name="orientation">vertical</property>
-            <child>
-              <object class="GtkBox">
-                <property name="orientation">horizontal</property>
-                <child>
-                  <object class="GtkButton">
-                    <property name="label">Add Child</property>
-                    <signal name="clicked" handler="add_child" swapped="yes"/>
-                  </object>
-                </child>
-                <child>
-                  <object class="GtkButton">
-                    <property name="label">Add Guide</property>
-                    <signal name="clicked" handler="add_guide" swapped="yes"/>
-                  </object>
-                </child>
-                <child>
-                  <object class="GtkButton">
-                    <property name="label">Add Constraint</property>
-                    <signal name="clicked" handler="add_constraint" swapped="yes"/>
-                  </object>
-                </child>
-              </object>
-            </child>
-            <child>
-              <object class="GtkScrolledWindow">
-                <property name="hscrollbar-policy">never</property>
-                <property name="vscrollbar-policy">automatic</property>
-                <property name="vexpand">1</property>
-                <child>
-                  <object class="GtkListBox" id="list">
-                    <property name="show-separators">1</property>
-                    <property name="selection-mode">none</property>
-                    <signal name="row-activated" handler="row_activated"/>
-                  </object>
-                </child>
-              </object>
-            </child>
-          </object>
-        </child>
-        <child>
-          <object class="ConstraintView" id="view">
-          </object>
-        </child>
-      </object>
-    </child>
-  </template>
-</interface>
--- a/demos/constraint-editor/constraint-editor.c
+++ b/demos/constraint-editor/constraint-editor.c
@@ -1,680 +0,0 @@
-/*
- * Copyright © 2019 Red Hat, Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library. If not, see <http://www.gnu.org/licenses/>.
- *
- * Authors: Matthias Clasen
- */
-
-#include "config.h"
-
-#include "constraint-editor.h"
-
-struct _ConstraintEditor
-{
-  GtkWidget parent_instance;
-
-  GtkWidget *grid;
-  GtkWidget *target;
-  GtkWidget *target_attr;
-  GtkWidget *relation;
-  GtkWidget *source;
-  GtkWidget *source_attr;
-  GtkWidget *multiplier;
-  GtkWidget *constant;
-  GtkWidget *strength;
-  GtkWidget *preview;
-  GtkWidget *button;
-
-  GtkConstraint *constraint;
-  GListModel *model;
-
-  gboolean constructed;
-};
-
-enum {
-  PROP_MODEL = 1,
-  PROP_CONSTRAINT,
-  LAST_PROP
-};
-
-static GParamSpec *pspecs[LAST_PROP];
-
-enum {
-  DONE,
-  LAST_SIGNAL
-};
-
-static guint signals[LAST_SIGNAL];
-
-G_DEFINE_TYPE(ConstraintEditor, constraint_editor, GTK_TYPE_WIDGET);
-
-static const char *
-get_target_name (GtkConstraintTarget *target)
-{
-  if (target == NULL)
-    return "super";
-  else if (GTK_IS_WIDGET (target))
-    return gtk_widget_get_name (GTK_WIDGET (target));
-  else if (GTK_IS_CONSTRAINT_GUIDE (target))
-    return gtk_constraint_guide_get_name (GTK_CONSTRAINT_GUIDE (target));
-  else
-    return "";
-}
-
-static void
-constraint_target_combo (GListModel *model,
-                         GtkWidget  *combo,
-                         gboolean    is_source)
-{
-  int i;
-
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "super", "Super");
-
-  if (model)
-    {
-      for (i = 0; i < g_list_model_get_n_items (model); i++)
-        {
-          GObject *item = g_list_model_get_object (model, i);
-          const char *name;
-
-          if (GTK_IS_CONSTRAINT (item))
-            continue;
-
-          name = get_target_name (GTK_CONSTRAINT_TARGET (item));
-
-          gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), name, name);
-          g_object_unref (item);
-        }
-    }
-}
-
-static void
-constraint_attribute_combo (GtkWidget *combo,
-                            gboolean is_source)
-{
-  if (is_source)
-    gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "none", "None");
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "left", "Left");
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "right", "Right");
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "top", "Top");
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "bottom", "Bottom");
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "start", "Start");
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "end", "End");
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "width", "Width");
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "height", "Height");
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "center-x", "Center X");
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "center-y", "Center Y");
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "baseline", "Baseline");
-}
-
-static void
-constraint_relation_combo (GtkWidget *combo)
-{
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "le", "≤");
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "eq", "=");
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "ge", "≥");
-}
-
-static void
-constraint_strength_combo (GtkWidget *combo)
-{
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "weak", "Weak");
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "medium", "Medium");
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "strong", "Strong");
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "required", "Required");
-}
-
-static gpointer
-get_target (GListModel *model,
-            const char *id)
-{
-  int i;
-
-  if (id == NULL)
-    return NULL;
-
-  if (strcmp ("super", id) == 0)
-    return NULL;
-
-  for (i = 0; i < g_list_model_get_n_items (model); i++)
-    {
-      GObject *item = g_list_model_get_object (model, i);
-      g_object_unref (item);
-      if (GTK_IS_CONSTRAINT (item))
-        continue;
-      else if (GTK_IS_WIDGET (item))
-        {
-          if (strcmp (id, gtk_widget_get_name (GTK_WIDGET (item))) == 0)
-            return item;
-        }
-      else if (GTK_IS_CONSTRAINT_GUIDE (item))
-        {
-          if (strcmp (id, gtk_constraint_guide_get_name (GTK_CONSTRAINT_GUIDE (item))) == 0)
-            return item;
-        }
-    }
-
-  return NULL;
-}
-
-static GtkConstraintAttribute
-get_target_attr (const char *id)
-{
-  GtkConstraintAttribute attr;
-  GEnumClass *class = g_type_class_ref (GTK_TYPE_CONSTRAINT_ATTRIBUTE);
-  GEnumValue *value = g_enum_get_value_by_nick (class, id);
-  attr = value->value;
-  g_type_class_unref (class);
-
-  return attr;
-}
-
-static const char *
-get_attr_nick (GtkConstraintAttribute attr)
-{
-  GEnumClass *class = g_type_class_ref (GTK_TYPE_CONSTRAINT_ATTRIBUTE);
-  GEnumValue *value = g_enum_get_value (class, attr);
-  const char *nick = value->value_nick;
-  g_type_class_unref (class);
-
-  return nick;
-}
-
-static GtkConstraintRelation
-get_relation (const char *id)
-{
-  GtkConstraintRelation relation;
-  GEnumClass *class = g_type_class_ref (GTK_TYPE_CONSTRAINT_RELATION);
-  GEnumValue *value = g_enum_get_value_by_nick (class, id);
-  relation = value->value;
-  g_type_class_unref (class);
-
-  return relation;
-}
-
-static const char *
-get_relation_nick (GtkConstraintRelation relation)
-{
-  GEnumClass *class = g_type_class_ref (GTK_TYPE_CONSTRAINT_RELATION);
-  GEnumValue *value = g_enum_get_value (class, relation);
-  const char *nick = value->value_nick;
-  g_type_class_unref (class);
-
-  return nick;
-}
-
-static const char *
-get_relation_display_name (GtkConstraintRelation relation)
-{
-  switch (relation)
-    {
-    case GTK_CONSTRAINT_RELATION_LE:
-      return "≤";
-    case GTK_CONSTRAINT_RELATION_EQ:
-      return "=";
-    case GTK_CONSTRAINT_RELATION_GE:
-      return "≥";
-    default:
-      return "?";
-    }
-}
-
-static GtkConstraintStrength
-get_strength (const char *id)
-{
-  GtkConstraintStrength strength;
-  GEnumClass *class = g_type_class_ref (GTK_TYPE_CONSTRAINT_STRENGTH);
-  GEnumValue *value = g_enum_get_value_by_nick (class, id);
-  strength = value->value;
-  g_type_class_unref (class);
-
-  return strength;
-}
-
-static const char *
-get_strength_nick (GtkConstraintStrength strength)
-{
-  GEnumClass *class = g_type_class_ref (GTK_TYPE_CONSTRAINT_STRENGTH);
-  GEnumValue *value = g_enum_get_value (class, strength);
-  const char *nick = value->value_nick;
-  g_type_class_unref (class);
-
-  return nick;
-}
-
-void
-constraint_editor_serialize_constraint (GString       *str,
-                                        int            indent,
-                                        GtkConstraint *constraint)
-{
-  const char *target;
-  const char *target_attr;
-  const char *relation;
-  const char *source;
-  const char *source_attr;
-  double multiplier;
-  double constant;
-  const char *strength;
-
-  target = get_target_name (gtk_constraint_get_target (constraint));
-  target_attr = get_attr_nick (gtk_constraint_get_target_attribute (constraint));
-  relation = get_relation_nick (gtk_constraint_get_relation (constraint));
-  source = get_target_name (gtk_constraint_get_source (constraint));
-  source_attr = get_attr_nick (gtk_constraint_get_source_attribute (constraint));
-  multiplier = gtk_constraint_get_multiplier (constraint);
-  constant = gtk_constraint_get_constant (constraint);
-  strength = get_strength_nick (gtk_constraint_get_strength (constraint));
-
-  g_string_append_printf (str, "%*s<constraint target=\"%s\" target-attribute=\"%s\"\n", indent, "", target, target_attr);
-  g_string_append_printf (str, "%*s            relation=\"%s\"\n", indent, "", relation);
-  if (strcmp (source_attr, "none") != 0)
-    {
-      g_string_append_printf (str, "%*s            source=\"%s\" source-attribute=\"%s\"\n", indent, "", source, source_attr);
-      g_string_append_printf (str, "%*s            multiplier=\"%g\"\n", indent, "", multiplier);
-    }
-  g_string_append_printf (str, "%*s            constant=\"%g\"\n", indent, "", constant);
-  g_string_append_printf (str, "%*s            strength=\"%s\" />\n", indent, "", strength);
-}
-
-static void
-create_constraint (GtkButton        *button,
-                   ConstraintEditor *editor)
-{
-  const char *id;
-  gpointer target;
-  GtkConstraintAttribute target_attr;
-  gpointer source;
-  GtkConstraintAttribute source_attr;
-  GtkConstraintRelation relation;
-  double multiplier;
-  double constant;
-  int strength;
-  GtkConstraint *constraint;
-
-  id = gtk_combo_box_get_active_id (GTK_COMBO_BOX (editor->target));
-  target = get_target (editor->model, id);
-  id = gtk_combo_box_get_active_id (GTK_COMBO_BOX (editor->target_attr));
-  target_attr = get_target_attr (id);
-
-  id = gtk_combo_box_get_active_id (GTK_COMBO_BOX (editor->source));
-  source = get_target (editor->model, id);
-  id = gtk_combo_box_get_active_id (GTK_COMBO_BOX (editor->source_attr));
-  source_attr = get_target_attr (id);
-
-  id = gtk_combo_box_get_active_id (GTK_COMBO_BOX (editor->relation));
-  relation = get_relation (id);
-
-  multiplier = g_ascii_strtod (gtk_editable_get_text (GTK_EDITABLE (editor->multiplier)), NULL);
-
-  constant = g_ascii_strtod (gtk_editable_get_text (GTK_EDITABLE (editor->constant)), NULL);
-
-  id = gtk_combo_box_get_active_id (GTK_COMBO_BOX (editor->strength));
-  strength = get_strength (id);
-
-  constraint = gtk_constraint_new (target, target_attr,
-                                   relation,
-                                   source, source_attr,
-                                   multiplier,
-                                   constant,
-                                   strength);
-  g_signal_emit (editor, signals[DONE], 0, constraint);
-  g_object_unref (constraint);
-}
-
-static void
-source_attr_changed (ConstraintEditor *editor)
-{
-  const char *id;
-
-  id = gtk_combo_box_get_active_id (GTK_COMBO_BOX (editor->source_attr));
-  if (strcmp (id, "none") == 0)
-    {
-      gtk_combo_box_set_active (GTK_COMBO_BOX (editor->source), -1);
-      gtk_editable_set_text (GTK_EDITABLE (editor->multiplier), "");
-      gtk_widget_set_sensitive (editor->source, FALSE);
-      gtk_widget_set_sensitive (editor->multiplier, FALSE);
-    }
-  else
-    {
-      gtk_widget_set_sensitive (editor->source, TRUE);
-      gtk_widget_set_sensitive (editor->multiplier, TRUE);
-      gtk_editable_set_text (GTK_EDITABLE (editor->multiplier), "1");
-    }
-}
-
-char *
-constraint_editor_constraint_to_string (GtkConstraint *constraint)
-{
-  GString *str;
-  const char *name;
-  const char *attr;
-  const char *relation;
-  double c, m;
-
-  str = g_string_new ("");
-
-  name = get_target_name (gtk_constraint_get_target (constraint));
-  attr = get_attr_nick (gtk_constraint_get_target_attribute (constraint));
-  relation = get_relation_display_name (gtk_constraint_get_relation (constraint));
-
-  if (name == NULL)
-    name = "[ ]";
-
-  g_string_append_printf (str, "%s.%s %s ", name, attr, relation);
-
-  c = gtk_constraint_get_constant (constraint);
-
-  attr = get_attr_nick (gtk_constraint_get_source_attribute (constraint));
-  if (strcmp (attr, "none") != 0)
-    {
-      name = get_target_name (gtk_constraint_get_source (constraint));
-      m = gtk_constraint_get_multiplier (constraint);
-
-      if (name == NULL)
-        name = "[ ]";
-
-      g_string_append_printf (str, "%s.%s", name, attr);
-
-      if (m != 1.0)
-        g_string_append_printf (str, " × %g", m);
-
-      if (c > 0.0)
-        g_string_append_printf (str, " + %g", c);
-      else if (c < 0.0)
-        g_string_append_printf (str, " - %g", -c);
-    }
-  else
-    g_string_append_printf (str, "%g", c);
-
-  return g_string_free (str, FALSE);
-}
-
-static void
-update_preview (ConstraintEditor *editor)
-{
-  GString *str;
-  const char *name;
-  const char *attr;
-  char *relation;
-  const char *multiplier;
-  const char *constant;
-  double c, m;
-
-  if (!editor->constructed)
-    return;
-
-  str = g_string_new ("");
-
-  name = gtk_combo_box_get_active_id (GTK_COMBO_BOX (editor->target));
-  attr = gtk_combo_box_get_active_id (GTK_COMBO_BOX (editor->target_attr));
-  relation = gtk_combo_box_text_get_active_text (GTK_COMBO_BOX_TEXT (editor->relation));
-
-  if (name == NULL)
-    name = "[ ]";
-
-  g_string_append_printf (str, "%s.%s %s ", name, attr, relation);
-  g_free (relation);
-
-  constant = gtk_editable_get_text (GTK_EDITABLE (editor->constant));
-  c = g_ascii_strtod (constant, NULL);
-
-  attr = gtk_combo_box_get_active_id (GTK_COMBO_BOX (editor->source_attr));
-  if (strcmp (attr, "none") != 0)
-    {
-      name = gtk_combo_box_get_active_id (GTK_COMBO_BOX (editor->source));
-      multiplier = gtk_editable_get_text (GTK_EDITABLE (editor->multiplier));
-      m = g_ascii_strtod (multiplier, NULL);
-
-      if (name == NULL)
-        name = "[ ]";
-
-      g_string_append_printf (str, "%s.%s", name, attr);
-
-      if (m != 1.0)
-        g_string_append_printf (str, " × %g", m);
-
-      if (c > 0.0)
-        g_string_append_printf (str, " + %g", c);
-      else if (c < 0.0)
-        g_string_append_printf (str, " - %g", -c);
-    }
-  else
-    g_string_append_printf (str, "%g", c);
-
-  gtk_label_set_label (GTK_LABEL (editor->preview), str->str);
-
-  g_string_free (str, TRUE);
-}
-
-static void
-update_button (ConstraintEditor *editor)
-{
-  const char *target = gtk_combo_box_get_active_id (GTK_COMBO_BOX (editor->target));
-  const char *source = gtk_combo_box_get_active_id (GTK_COMBO_BOX (editor->source));
-  const char *source_attr = gtk_combo_box_get_active_id (GTK_COMBO_BOX (editor->source_attr));
-
-  if (target &&
-      (source || (source_attr && get_target_attr (source_attr) == GTK_CONSTRAINT_ATTRIBUTE_NONE)))
-    gtk_widget_set_sensitive (editor->button, TRUE);
-  else
-    gtk_widget_set_sensitive (editor->button, FALSE);
-}
-
-static void
-constraint_editor_init (ConstraintEditor *editor)
-{
-  gtk_widget_init_template (GTK_WIDGET (editor));
-}
-
-static void
-constraint_editor_constructed (GObject *object)
-{
-  ConstraintEditor *editor = CONSTRAINT_EDITOR (object);
-
-  constraint_target_combo (editor->model, editor->target, FALSE);
-  constraint_attribute_combo (editor->target_attr, FALSE);
-  constraint_relation_combo (editor->relation);
-  constraint_target_combo (editor->model, editor->source, TRUE);
-  constraint_attribute_combo (editor->source_attr, TRUE);
-
-  constraint_strength_combo (editor->strength);
-
-  if (editor->constraint)
-    {
-      GtkConstraintTarget *target;
-      GtkConstraintAttribute attr;
-      GtkConstraintRelation relation;
-      GtkConstraintStrength strength;
-      const char *nick;
-      char *val;
-      double multiplier;
-      double constant;
-
-      target = gtk_constraint_get_target (editor->constraint);
-      nick = get_target_name (target);
-      gtk_combo_box_set_active_id (GTK_COMBO_BOX (editor->target), nick);
-
-      attr = gtk_constraint_get_target_attribute (editor->constraint);
-      nick = get_attr_nick (attr);
-      gtk_combo_box_set_active_id (GTK_COMBO_BOX (editor->target_attr), nick);
-
-      target = gtk_constraint_get_source (editor->constraint);
-      nick = get_target_name (target);
-      gtk_combo_box_set_active_id (GTK_COMBO_BOX (editor->source), nick);
-
-      attr = gtk_constraint_get_source_attribute (editor->constraint);
-      nick = get_attr_nick (attr);
-      gtk_combo_box_set_active_id (GTK_COMBO_BOX (editor->source_attr), nick);
-
-      relation = gtk_constraint_get_relation (editor->constraint);
-      nick = get_relation_nick (relation);
-      gtk_combo_box_set_active_id (GTK_COMBO_BOX (editor->relation), nick);
-
-      multiplier = gtk_constraint_get_multiplier (editor->constraint);
-      val = g_strdup_printf ("%g", multiplier);
-      gtk_editable_set_text (GTK_EDITABLE (editor->multiplier), val);
-      g_free (val);
-
-      constant = gtk_constraint_get_constant (editor->constraint);
-      val = g_strdup_printf ("%g", constant);
-      gtk_editable_set_text (GTK_EDITABLE (editor->constant), val);
-      g_free (val);
-
-      strength = gtk_constraint_get_strength (editor->constraint);
-      nick = get_strength_nick (strength);
-      gtk_combo_box_set_active_id (GTK_COMBO_BOX (editor->strength), nick);
-
-      gtk_button_set_label (GTK_BUTTON (editor->button), "Apply");
-    }
-  else
-    {
-      gtk_combo_box_set_active_id (GTK_COMBO_BOX (editor->target_attr), "left");
-      gtk_combo_box_set_active_id (GTK_COMBO_BOX (editor->source_attr), "left");
-      gtk_combo_box_set_active_id (GTK_COMBO_BOX (editor->relation), "eq");
-      gtk_combo_box_set_active_id (GTK_COMBO_BOX (editor->strength), "required");
-
-      gtk_editable_set_text (GTK_EDITABLE (editor->multiplier), "1.0");
-      gtk_editable_set_text (GTK_EDITABLE (editor->constant), "0.0");
-
-      gtk_button_set_label (GTK_BUTTON (editor->button), "Create");
-    }
-
-  editor->constructed = TRUE;
-  update_preview (editor);
-  update_button (editor);
-}
-
-static void
-constraint_editor_set_property (GObject      *object,
-                                guint         property_id,
-                                const GValue *value,
-                                GParamSpec   *pspec)
-{
-  ConstraintEditor *self = CONSTRAINT_EDITOR (object);
-
-  switch (property_id)
-    {
-    case PROP_MODEL:
-      self->model = g_value_dup_object (value);
-      break;
-
-    case PROP_CONSTRAINT:
-      self->constraint = g_value_dup_object (value);
-      break;
-
-    default:
-      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
-    }
-}
-
-static void
-constraint_editor_get_property (GObject    *object,
-                                guint       property_id,
-                                GValue     *value,
-                                GParamSpec *pspec)
-{
-  ConstraintEditor *self = CONSTRAINT_EDITOR (object);
-
-  switch (property_id)
-    {
-    case PROP_MODEL:
-      g_value_set_object (value, self->model);
-      break;
-
-    case PROP_CONSTRAINT:
-      g_value_set_object (value, self->constraint);
-      break;
-
-    default:
-      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
-    }
-}
-
-static void
-constraint_editor_dispose (GObject *object)
-{
-  ConstraintEditor *self = (ConstraintEditor *)object;
-
-  g_clear_pointer (&self->grid, gtk_widget_unparent);
-  g_clear_object (&self->model);
-  g_clear_object (&self->constraint);
-
-  G_OBJECT_CLASS (constraint_editor_parent_class)->dispose (object);
-}
-
-static void
-constraint_editor_class_init (ConstraintEditorClass *class)
-{
-  GObjectClass *object_class = G_OBJECT_CLASS (class);
-  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
-
-  object_class->constructed = constraint_editor_constructed;
-  object_class->dispose = constraint_editor_dispose;
-  object_class->set_property = constraint_editor_set_property;
-  object_class->get_property = constraint_editor_get_property;
-
-  pspecs[PROP_CONSTRAINT] =
-    g_param_spec_object ("constraint", "constraint", "constraint",
-                         GTK_TYPE_CONSTRAINT,
-                         G_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY);
-
-  pspecs[PROP_MODEL] =
-    g_param_spec_object ("model", "model", "model",
-                         G_TYPE_LIST_MODEL,
-                         G_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY);
-
-  g_object_class_install_properties (object_class, LAST_PROP, pspecs);
-
-  signals[DONE] =
-    g_signal_new ("done",
-                  G_TYPE_FROM_CLASS (object_class),
-                  G_SIGNAL_RUN_LAST,
-                  0,
-                  NULL, NULL,
-                  NULL,
-                  G_TYPE_NONE, 1, GTK_TYPE_CONSTRAINT);
-
-  gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_BIN_LAYOUT);
-
-  gtk_widget_class_set_template_from_resource (widget_class,
-                                               "/org/gtk/gtk4/constraint-editor/constraint-editor.ui");
-
-  gtk_widget_class_bind_template_child (widget_class, ConstraintEditor, grid);
-  gtk_widget_class_bind_template_child (widget_class, ConstraintEditor, target);
-  gtk_widget_class_bind_template_child (widget_class, ConstraintEditor, target_attr);
-  gtk_widget_class_bind_template_child (widget_class, ConstraintEditor, relation);
-  gtk_widget_class_bind_template_child (widget_class, ConstraintEditor, source);
-  gtk_widget_class_bind_template_child (widget_class, ConstraintEditor, source_attr);
-  gtk_widget_class_bind_template_child (widget_class, ConstraintEditor, multiplier);
-  gtk_widget_class_bind_template_child (widget_class, ConstraintEditor, constant);
-  gtk_widget_class_bind_template_child (widget_class, ConstraintEditor, strength);
-  gtk_widget_class_bind_template_child (widget_class, ConstraintEditor, preview);
-  gtk_widget_class_bind_template_child (widget_class, ConstraintEditor, button);
-
-  gtk_widget_class_bind_template_callback (widget_class, update_preview);
-  gtk_widget_class_bind_template_callback (widget_class, update_button);
-  gtk_widget_class_bind_template_callback (widget_class, create_constraint);
-  gtk_widget_class_bind_template_callback (widget_class, source_attr_changed);
-}
-
-ConstraintEditor *
-constraint_editor_new (GListModel    *model,
-                       GtkConstraint *constraint)
-{
-  return g_object_new (CONSTRAINT_EDITOR_TYPE,
-                       "model", model,
-                       "constraint", constraint,
-                       NULL);
-}
--- a/demos/constraint-editor/constraint-editor.css
+++ b/demos/constraint-editor/constraint-editor.css
@@ -1,12 +0,0 @@
-constraintview {
-  background: black;
-  color: white;
-}
-
-constraintview .child {
-  background: red;
-}
-
-constraintview .guide {
-  background: blue;
-}
--- a/demos/constraint-editor/constraint-editor.gresource.xml
+++ b/demos/constraint-editor/constraint-editor.gresource.xml
@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<gresources>
-  <gresource prefix="/org/gtk/gtk4/constraint-editor">
-    <file preprocess="xml-stripblanks">constraint-editor-window.ui</file>
-    <file preprocess="xml-stripblanks">constraint-editor.ui</file>
-    <file preprocess="xml-stripblanks">guide-editor.ui</file>
-    <file>constraint-editor.css</file>
-  </gresource>
-</gresources>
--- a/demos/constraint-editor/constraint-editor.h
+++ b/demos/constraint-editor/constraint-editor.h
@@ -1,34 +0,0 @@
-/*
- * Copyright © 2019 Red Hat, Inc
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library. If not, see <http://www.gnu.org/licenses/>.
- *
- * Authors: Matthias Clasen
- */
-
-#pragma once
-
-#include <gtk/gtk.h>
-
-#define CONSTRAINT_EDITOR_TYPE (constraint_editor_get_type ())
-
-G_DECLARE_FINAL_TYPE (ConstraintEditor, constraint_editor, CONSTRAINT, EDITOR, GtkWidget)
-
-ConstraintEditor * constraint_editor_new (GListModel    *model,
-                                          GtkConstraint *constraint);
-
-void constraint_editor_serialize_constraint (GString       *str,
-                                             int            indent,
-                                             GtkConstraint *constraint);
-char *constraint_editor_constraint_to_string (GtkConstraint *constraint);
--- a/demos/constraint-editor/constraint-editor.ui
+++ b/demos/constraint-editor/constraint-editor.ui
@@ -1,167 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<interface>
-  <template class="ConstraintEditor" parent="GtkWidget">
-    <child>
-      <object class="GtkGrid" id="grid">
-        <property name="margin-start">20</property>
-        <property name="margin-end">20</property>
-        <property name="margin-top">20</property>
-        <property name="margin-bottom">20</property>
-        <property name="row-spacing">10</property>
-        <property name="column-spacing">10</property>
-        <child>
-          <object class="GtkLabel">
-            <property name="label">Target</property>
-            <layout>
-              <property name="column">0</property>
-              <property name="row">1</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkComboBoxText" id="target">
-            <signal name="changed" handler="update_preview" swapped="yes"/>
-            <signal name="changed" handler="update_button" swapped="yes"/>
-            <layout>
-              <property name="column">1</property>
-              <property name="row">1</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkComboBoxText" id="target_attr">
-            <signal name="changed" handler="update_preview" swapped="yes"/>
-            <layout>
-              <property name="column">2</property>
-              <property name="row">1</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkLabel">
-            <property name="label">Relation</property>
-            <layout>
-              <property name="column">0</property>
-              <property name="row">2</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkComboBoxText" id="relation">
-            <signal name="changed" handler="update_preview" swapped="yes"/>
-            <layout>
-              <property name="column">1</property>
-              <property name="row">2</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkLabel">
-            <property name="label">Source</property>
-            <layout>
-              <property name="column">0</property>
-              <property name="row">3</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkComboBoxText" id="source">
-            <signal name="changed" handler="update_preview" swapped="yes"/>
-            <signal name="changed" handler="update_button" swapped="yes"/>
-            <layout>
-              <property name="column">1</property>
-              <property name="row">3</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkComboBoxText" id="source_attr">
-            <signal name="changed" handler="update_preview" swapped="yes"/>
-            <signal name="changed" handler="source_attr_changed" swapped="yes"/>
-            <signal name="changed" handler="update_button" swapped="yes"/>
-            <layout>
-              <property name="column">2</property>
-              <property name="row">3</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkLabel">
-            <property name="label">Multiplier</property>
-            <layout>
-              <property name="column">0</property>
-              <property name="row">4</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkEntry" id="multiplier">
-            <signal name="changed" handler="update_preview" swapped="yes"/>
-            <layout>
-              <property name="column">1</property>
-              <property name="row">4</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkLabel">
-            <property name="label">Constant</property>
-            <layout>
-              <property name="column">0</property>
-              <property name="row">5</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkEntry" id="constant">
-            <signal name="changed" handler="update_preview" swapped="yes"/>
-            <layout>
-              <property name="column">1</property>
-              <property name="row">5</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkLabel">
-            <property name="label">Strength</property>
-            <layout>
-              <property name="column">0</property>
-              <property name="row">6</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkComboBoxText" id="strength">
-            <layout>
-              <property name="column">1</property>
-              <property name="row">6</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkLabel" id="preview">
-            <property name="xalign">0</property>
-            <layout>
-              <property name="column">1</property>
-              <property name="row">7</property>
-              <property name="column-span">2</property>
-            </layout>
-            <attributes>
-              <attribute name="scale" value="1.44"/>
-            </attributes>
-          </object>
-        </child>
-        <child>
-          <object class="GtkButton" id="button">
-            <property name="label">Create</property>
-            <signal name="clicked" handler="create_constraint"/>
-            <layout>
-              <property name="column">2</property>
-              <property name="row">8</property>
-            </layout>
-          </object>
-        </child>
-      </object>
-    </child>
-  </template>
-</interface>
--- a/demos/constraint-editor/constraint-view-child.c
+++ b/demos/constraint-editor/constraint-view-child.c
@@ -1,93 +0,0 @@
-/*
- * Copyright © 2019 Red Hat, Inc
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library. If not, see <http://www.gnu.org/licenses/>.
- *
- * Authors: Matthias Clasen
- */
-
-#include "constraint-view-child.h"
-
-struct _ConstraintViewChild
-{
-  GObject parent_instance;
-
-  char *name;
-};
-
-enum {
-  PROP_NAME = 1,
-  LAST_PROP
-};
-
-static GParamSpec props[LAST_PROP];
-
-G_DEFINE_TYPE (ConstraintViewChild, constraint_view_child, G_TYPE_OBJECT)
-
-static void
-constraint_view_child_init (ConstraintViewChild *child)
-{
-}
-
-static void
-constraint_view_child_finalize (GObject *object)
-{
-  ConstraintViewChild *child = CONSTRAINT_VIEW_CHILD (object);
-
-  g_free (child->name);
-
-  G_OBJECT_CLASS (constraint_view_child_parent_class)->finalize (object);
-}
-
-static void
-constraint_view_child_set_property (GObject *object,
-                                    
-static void
-constraint_view_child_class_init (ConstraintViewChildClass *class)
-{
-  GObjectClass *object_class = G_OBJECT_CLASS (class);
-
-  object_class->finalize = constraint_view_child_finalize;
-  object_class->get_property = constraint_view_child_get_property;
-  object_class->set_property = constraint_view_child_set_property;
-
-  props[PROP_NAME] =
-    g_param_spec_string ("name", "name", "name",
-                         NULL,
-                         G_PARAM_READWRITE);
-
-  g_object_class_install_properties (object_class, LAST_PROP, props);
-}
-
-#define CONSTRAINT_VIEW_CHILD_TYPE (constraint_view_get_type ())
-
-G_DECLARE_TYPE (ConstraintViewChild, constraint_view_child, CONSTRAINT, VIEW_CHILD, GObject)
-
-#define CONSTRAINT_VIEW_WIDGET_TYPE (constraint_view_widget_get_type ())
-
-G_DECLARE_FINAL_TYPE (ConstraintViewWidget, constraint_view_widget, CONSTRAINT, VIEW_WIDGET, ConstraintViewChild)
-
-ConstraintViewWidget * constraint_view_widget_new (void);
-
-#define CONSTRAINT_VIEW_GUIDE_TYPE (constraint_view_guide_get_type ())
-
-G_DECLARE_FINAL_TYPE (ConstraintViewGuide, constraint_view_guide, CONSTRAINT, VIEW_GUIDE, ConstraintViewChild)
-
-ConstraintViewGuide * constraint_view_guide_new (void);
-
-#define CONSTRAINT_VIEW_CONSTRAINT_TYPE (constraint_view_constraint_get_type ())
-
-G_DECLARE_FINAL_TYPE (ConstraintViewConstraint, constraint_view_constraint, CONSTRAINT, VIEW_CONSTRAINT, ConstraintViewChild)
-
-ConstraintViewGuide * constraint_view_constraint_new (void);
--- a/demos/constraint-editor/constraint-view-child.h
+++ b/demos/constraint-editor/constraint-view-child.h
@@ -1,44 +0,0 @@
-/*
- * Copyright © 2019 Red Hat, Inc
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library. If not, see <http://www.gnu.org/licenses/>.
- *
- * Authors: Matthias Clasen
- */
-
-#pragma once
-
-#include <gtk/gtk.h>
-
-#define CONSTRAINT_VIEW_CHILD_TYPE (constraint_view_get_type ())
-
-G_DECLARE_TYPE (ConstraintViewChild, constraint_view_child, CONSTRAINT, VIEW_CHILD, GObject)
-
-#define CONSTRAINT_VIEW_WIDGET_TYPE (constraint_view_widget_get_type ())
-
-G_DECLARE_FINAL_TYPE (ConstraintViewWidget, constraint_view_widget, CONSTRAINT, VIEW_WIDGET, ConstraintViewChild)
-
-ConstraintViewWidget * constraint_view_widget_new (void);
-
-#define CONSTRAINT_VIEW_GUIDE_TYPE (constraint_view_guide_get_type ())
-
-G_DECLARE_FINAL_TYPE (ConstraintViewGuide, constraint_view_guide, CONSTRAINT, VIEW_GUIDE, ConstraintViewChild)
-
-ConstraintViewGuide * constraint_view_guide_new (void);
-
-#define CONSTRAINT_VIEW_CONSTRAINT_TYPE (constraint_view_constraint_get_type ())
-
-G_DECLARE_FINAL_TYPE (ConstraintViewConstraint, constraint_view_constraint, CONSTRAINT, VIEW_CONSTRAINT, ConstraintViewChild)
-
-ConstraintViewGuide * constraint_view_constraint_new (void);
--- a/demos/constraint-editor/constraint-view.c
+++ b/demos/constraint-editor/constraint-view.c
@@ -1,345 +0,0 @@
-/* Copyright (C) 2019 Red Hat, Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <gtk/gtk.h>
-#include "constraint-view.h"
-
-struct _ConstraintView
-{
-  GtkWidget parent;
-
-  GListModel *model;
-
-  GtkWidget *drag_widget;
-};
-
-G_DEFINE_TYPE (ConstraintView, constraint_view, GTK_TYPE_WIDGET);
-
-static void
-constraint_view_dispose (GObject *object)
-{
-  ConstraintView *view = CONSTRAINT_VIEW (object);
-  GtkWidget *child;
-
-  while ((child = gtk_widget_get_first_child (GTK_WIDGET (view))) != NULL)
-    gtk_widget_unparent (child);
-
-  g_clear_object (&view->model);
-
-  G_OBJECT_CLASS (constraint_view_parent_class)->dispose (object);
-}
-
-static void
-constraint_view_class_init (ConstraintViewClass *klass)
-{
-  GObjectClass *object_class = G_OBJECT_CLASS (klass);
-  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
-
-  object_class->dispose = constraint_view_dispose;
-
-  gtk_widget_class_set_css_name (widget_class, "constraintview");
-}
-
-static void
-update_weak_position (ConstraintView *self,
-                      GtkWidget      *child,
-                      double          x,
-                      double          y)
-{
-  GtkLayoutManager *manager;
-  GtkConstraint *constraint;
-
-  manager = gtk_widget_get_layout_manager (GTK_WIDGET (self));
-  constraint = (GtkConstraint *)g_object_get_data (G_OBJECT (child), "x-constraint");
-  if (constraint)
-    {
-      gtk_constraint_layout_remove_constraint (GTK_CONSTRAINT_LAYOUT (manager),
-                                               constraint);
-      g_object_set_data (G_OBJECT (child), "x-constraint", NULL);
-    }
-  if (x != -100)
-    {
-      constraint = gtk_constraint_new_constant (child,
-                                                GTK_CONSTRAINT_ATTRIBUTE_CENTER_X,
-                                                GTK_CONSTRAINT_RELATION_EQ,
-                                                x,
-                                                GTK_CONSTRAINT_STRENGTH_WEAK);
-      g_object_set_data (G_OBJECT (constraint), "internal", (char *)"yes");
-      gtk_constraint_layout_add_constraint (GTK_CONSTRAINT_LAYOUT (manager),
-                                            constraint);
-      g_object_set_data (G_OBJECT (child), "x-constraint", constraint);
-    }
-
-  constraint = (GtkConstraint *)g_object_get_data (G_OBJECT (child), "y-constraint");
-  if (constraint)
-    {
-      gtk_constraint_layout_remove_constraint (GTK_CONSTRAINT_LAYOUT (manager),
-                                                   constraint);
-      g_object_set_data (G_OBJECT (child), "y-constraint", NULL);
-    }
-  if (y != -100)
-    {
-      constraint = gtk_constraint_new_constant (child,
-                                                GTK_CONSTRAINT_ATTRIBUTE_CENTER_Y,
-                                                GTK_CONSTRAINT_RELATION_EQ,
-                                                y,
-                                                GTK_CONSTRAINT_STRENGTH_WEAK);
-      g_object_set_data (G_OBJECT (constraint), "internal", (char *)"yes");
-      gtk_constraint_layout_add_constraint (GTK_CONSTRAINT_LAYOUT (manager),
-                                            constraint);
-      g_object_set_data (G_OBJECT (child), "y-constraint", constraint);
-    }
-}
-
-static void
-drag_begin (GtkGestureDrag *drag,
-            double          start_x,
-            double          start_y,
-            ConstraintView *self)
-{
-  GtkWidget *widget;
-
-  widget = gtk_widget_pick (GTK_WIDGET (self), start_x, start_y, GTK_PICK_DEFAULT);
-
-  if (GTK_IS_LABEL (widget))
-    {
-      widget = gtk_widget_get_ancestor (widget, GTK_TYPE_FRAME);
-      if (widget &&
-          gtk_widget_get_parent (widget) == (GtkWidget *)self)
-        {
-          self->drag_widget = widget;
-        }
-    }
-}
-
-static void
-drag_update (GtkGestureDrag *drag,
-             double          offset_x,
-             double          offset_y,
-             ConstraintView *self)
-{
-  double x, y;
-
-  if (!self->drag_widget)
-    return;
-
-  gtk_gesture_drag_get_start_point (drag, &x, &y);
-  update_weak_position (self, self->drag_widget, x + offset_x, y + offset_y);
-}
-
-static void
-drag_end (GtkGestureDrag *drag,
-          double          offset_x,
-          double          offset_y,
-          ConstraintView *self)
-{
-  self->drag_widget = NULL;
-}
-
-static gboolean
-omit_internal (gpointer item, gpointer user_data)
-{
-  if (g_object_get_data (G_OBJECT (item), "internal"))
-    return FALSE;
-
-  return TRUE;
-}
-
-static void
-constraint_view_init (ConstraintView *self)
-{
-  GtkLayoutManager *manager;
-  GtkEventController *controller;
-  GListStore *list;
-  GListModel *all_children;
-  GListModel *all_constraints;
-  GListModel *guides;
-  GListModel *children;
-  GListModel *constraints;
-  GtkFilter *filter;
-
-  manager = gtk_constraint_layout_new ();
-  gtk_widget_set_layout_manager (GTK_WIDGET (self), manager);
-
-  guides = gtk_constraint_layout_observe_guides (GTK_CONSTRAINT_LAYOUT (manager));
-
-  all_constraints = gtk_constraint_layout_observe_constraints (GTK_CONSTRAINT_LAYOUT (manager));
-  filter = GTK_FILTER (gtk_custom_filter_new (omit_internal, NULL, NULL));
-  constraints = (GListModel *)gtk_filter_list_model_new (all_constraints, filter);
-
-  all_children = gtk_widget_observe_children (GTK_WIDGET (self));
-  filter = GTK_FILTER (gtk_custom_filter_new (omit_internal, NULL, NULL));
-  children = (GListModel *)gtk_filter_list_model_new (all_children, filter);
-
-  list = g_list_store_new (G_TYPE_LIST_MODEL);
-  g_list_store_append (list, children);
-  g_list_store_append (list, guides);
-  g_list_store_append (list, constraints);
-  g_object_unref (children);
-  g_object_unref (guides);
-  g_object_unref (constraints);
-
-  self->model = G_LIST_MODEL (gtk_flatten_list_model_new (G_LIST_MODEL (list)));
-
-  controller = (GtkEventController *)gtk_gesture_drag_new ();
-  g_signal_connect (controller, "drag-begin", G_CALLBACK (drag_begin), self);
-  g_signal_connect (controller, "drag-update", G_CALLBACK (drag_update), self);
-  g_signal_connect (controller, "drag-end", G_CALLBACK (drag_end), self);
-  gtk_widget_add_controller (GTK_WIDGET (self), controller);
-}
-
-ConstraintView *
-constraint_view_new (void)
-{
-  return g_object_new (CONSTRAINT_VIEW_TYPE, NULL);
-}
-
-void
-constraint_view_add_child (ConstraintView *view,
-                           const char     *name)
-{
-  GtkWidget *frame;
-  GtkWidget *label;
-
-  label = gtk_label_new (name);
-  frame = gtk_frame_new (NULL);
-  gtk_widget_add_css_class (frame, "child");
-  gtk_widget_set_name (frame, name);
-  gtk_frame_set_child (GTK_FRAME (frame), label);
-  gtk_widget_set_parent (frame, GTK_WIDGET (view));
-
-  update_weak_position (view, frame, 100, 100);
-}
-
-void
-constraint_view_remove_child (ConstraintView *view,
-                              GtkWidget      *child)
-{
-  update_weak_position (view, child, -100, -100);
-  gtk_widget_unparent (child);
-}
-
-void
-constraint_view_add_guide (ConstraintView *view,
-                           GtkConstraintGuide *guide)
-{
-  GtkConstraintLayout *layout;
-  GtkWidget *frame;
-  GtkWidget *label;
-  const char *name;
-  GtkConstraint *constraint;
-  struct {
-    const char *name;
-    GtkConstraintAttribute attr;
-  } names[] = {
-    { "left-constraint", GTK_CONSTRAINT_ATTRIBUTE_LEFT },
-    { "top-constraint", GTK_CONSTRAINT_ATTRIBUTE_TOP },
-    { "width-constraint", GTK_CONSTRAINT_ATTRIBUTE_WIDTH },
-    { "height-constraint", GTK_CONSTRAINT_ATTRIBUTE_HEIGHT },
-  };
-  int i;
-
-  name = gtk_constraint_guide_get_name (guide);
-  label = gtk_label_new (name);
-  g_object_bind_property (guide, "name",
-                          label, "label",
-                          G_BINDING_DEFAULT);
-
-  frame = gtk_frame_new (NULL);
-  gtk_widget_add_css_class (frame, "guide");
-  g_object_set_data (G_OBJECT (frame), "internal", (char *)"yes");
-  gtk_frame_set_child (GTK_FRAME (frame), label);
-  gtk_widget_insert_after (frame, GTK_WIDGET (view), NULL);
-
-  g_object_set_data (G_OBJECT (guide), "frame", frame);
-
-  layout = GTK_CONSTRAINT_LAYOUT (gtk_widget_get_layout_manager (GTK_WIDGET (view)));
-  gtk_constraint_layout_add_guide (layout, g_object_ref (guide));
-
-  for (i = 0; i < G_N_ELEMENTS (names); i++)
-    {
-      constraint = gtk_constraint_new (frame,
-                                       names[i].attr,
-                                       GTK_CONSTRAINT_RELATION_EQ,
-                                       guide,
-                                       names[i].attr,
-                                       1.0, 0.0,
-                                       GTK_CONSTRAINT_STRENGTH_REQUIRED);
-      g_object_set_data (G_OBJECT (constraint), "internal", (char *)"yes");
-      gtk_constraint_layout_add_constraint (layout, constraint);
-      g_object_set_data (G_OBJECT (guide), names[i].name, constraint);
-    }
-
-  update_weak_position (view, frame, 150, 150);
-}
-
-void
-constraint_view_remove_guide (ConstraintView     *view,
-                              GtkConstraintGuide *guide)
-{
-  GtkConstraintLayout *layout;
-  GtkWidget *frame;
-  GtkConstraint *constraint;
-  const char *names[] = {
-    "left-constraint",
-    "top-constraint",
-    "width-constraint",
-    "height-constraint"
-  };
-  int i;
-
-  layout = GTK_CONSTRAINT_LAYOUT (gtk_widget_get_layout_manager (GTK_WIDGET (view)));
-
-  for (i = 0; i < G_N_ELEMENTS (names); i++)
-    {
-      constraint = (GtkConstraint*)g_object_get_data (G_OBJECT (guide), names[i]);
-      gtk_constraint_layout_remove_constraint (layout, constraint);
-    }
-
-  frame = (GtkWidget *)g_object_get_data (G_OBJECT (guide), "frame");
-  update_weak_position (view, frame, -100, -100);
-  gtk_widget_unparent (frame);
-
-  gtk_constraint_layout_remove_guide (layout, guide);
-}
-
-void
-constraint_view_add_constraint (ConstraintView *view,
-                                GtkConstraint  *constraint)
-{
-  GtkLayoutManager *manager;
-
-  manager = gtk_widget_get_layout_manager (GTK_WIDGET (view));
-  gtk_constraint_layout_add_constraint (GTK_CONSTRAINT_LAYOUT (manager),
-                                        g_object_ref (constraint));
-}
-
-void
-constraint_view_remove_constraint (ConstraintView *view,
-                                   GtkConstraint  *constraint)
-{
-  GtkLayoutManager *manager;
-
-  manager = gtk_widget_get_layout_manager (GTK_WIDGET (view));
-  gtk_constraint_layout_remove_constraint (GTK_CONSTRAINT_LAYOUT (manager),
-                                           constraint);
-}
-
-GListModel *
-constraint_view_get_model (ConstraintView *view)
-{
-  return view->model;
-}
--- a/demos/constraint-editor/constraint-view.h
+++ b/demos/constraint-editor/constraint-view.h
@@ -1,45 +0,0 @@
-/*
- * Copyright © 2019 Red Hat, Inc
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library. If not, see <http://www.gnu.org/licenses/>.
- *
- * Authors: Matthias Clasen
- */
-
-#pragma once
-
-#include <gtk/gtk.h>
-
-#define CONSTRAINT_VIEW_TYPE (constraint_view_get_type ())
-
-G_MODULE_EXPORT
-G_DECLARE_FINAL_TYPE (ConstraintView, constraint_view, CONSTRAINT, VIEW, GtkWidget)
-
-ConstraintView * constraint_view_new (void);
-
-void             constraint_view_add_child (ConstraintView *view,
-                                            const char     *name);
-void             constraint_view_remove_child (ConstraintView *view,
-                                               GtkWidget      *child);
-void             constraint_view_add_guide (ConstraintView     *view,
-                                            GtkConstraintGuide *guide);
-void             constraint_view_remove_guide (ConstraintView     *view,
-                                               GtkConstraintGuide *guide);
-void             constraint_view_guide_changed (ConstraintView     *view,
-                                                GtkConstraintGuide *guide);
-void             constraint_view_add_constraint (ConstraintView *view,
-                                                 GtkConstraint  *constraint);
-void             constraint_view_remove_constraint (ConstraintView *view,
-                                                    GtkConstraint  *constraint);
-GListModel *     constraint_view_get_model (ConstraintView *view);
--- a/demos/constraint-editor/guide-editor.c
+++ b/demos/constraint-editor/guide-editor.c
@@ -1,355 +0,0 @@
-/*
- * Copyright © 2019 Red Hat, Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library. If not, see <http://www.gnu.org/licenses/>.
- *
- * Authors: Matthias Clasen
- */
-
-#include "config.h"
-
-#include "guide-editor.h"
-
-struct _GuideEditor
-{
-  GtkWidget parent_instance;
-
-  GtkWidget *grid;
-  GtkWidget *name;
-  GtkWidget *min_width;
-  GtkWidget *min_height;
-  GtkWidget *nat_width;
-  GtkWidget *nat_height;
-  GtkWidget *max_width;
-  GtkWidget *max_height;
-  GtkWidget *strength;
-  GtkWidget *button;
-
-  GtkConstraintGuide *guide;
-
-  gboolean constructed;
-};
-
-enum {
-  PROP_GUIDE = 1,
-  LAST_PROP
-};
-
-static GParamSpec *pspecs[LAST_PROP];
-
-enum {
-  DONE,
-  LAST_SIGNAL
-};
-
-static guint signals[LAST_SIGNAL];
-
-G_DEFINE_TYPE(GuideEditor, guide_editor, GTK_TYPE_WIDGET);
-
-static void
-guide_strength_combo (GtkWidget *combo)
-{
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "weak", "Weak");
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "medium", "Medium");
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "strong", "Strong");
-  gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "required", "Required");
-}
-
-static GtkConstraintStrength
-get_strength (const char *id)
-{
-  GtkConstraintStrength strength;
-  GEnumClass *class = g_type_class_ref (GTK_TYPE_CONSTRAINT_STRENGTH);
-  GEnumValue *value = g_enum_get_value_by_nick (class, id);
-  strength = value->value;
-  g_type_class_unref (class);
-
-  return strength;
-}
-
-static const char *
-get_strength_nick (GtkConstraintStrength strength)
-{
-  GEnumClass *class = g_type_class_ref (GTK_TYPE_CONSTRAINT_STRENGTH);
-  GEnumValue *value = g_enum_get_value (class, strength);
-  const char *nick = value->value_nick;
-  g_type_class_unref (class);
-
-  return nick;
-}
-
-void
-guide_editor_serialize_guide (GString *str,
-                              int      indent,
-                              GtkConstraintGuide *guide)
-{
-  int min_width, min_height;
-  int nat_width, nat_height;
-  int max_width, max_height;
-  const char *name;
-  const char *strength;
-
-  gtk_constraint_guide_get_min_size (guide, &min_width, &min_height);
-  gtk_constraint_guide_get_nat_size (guide, &nat_width, &nat_height);
-  gtk_constraint_guide_get_max_size (guide, &max_width, &max_height);
-  name = gtk_constraint_guide_get_name (guide);
-  strength = get_strength_nick (gtk_constraint_guide_get_strength (guide));
-
-  g_string_append_printf (str, "%*s<guide min-width=\"%d\" min-height=\"%d\"\n", indent, "", min_width, min_height);
-  g_string_append_printf (str, "%*s       nat-width=\"%d\" nat-height=\"%d\"\n", indent, "", nat_width, nat_height);
-  g_string_append_printf (str, "%*s       max-width=\"%d\" max-height=\"%d\"\n", indent, "", max_width, max_height);
-  g_string_append_printf (str, "%*s       name=\"%s\" strength=\"%s\" />\n", indent, "", name, strength);
-}
-
-static void
-create_guide (GtkButton   *button,
-              GuideEditor *editor)
-{
-  const char *id;
-  int strength;
-  const char *name;
-  int w, h;
-  GtkConstraintGuide *guide;
-
-  if (editor->guide)
-    guide = g_object_ref (editor->guide);
-  else
-    guide = gtk_constraint_guide_new ();
-
-  name = gtk_editable_get_text (GTK_EDITABLE (editor->name));
-  gtk_constraint_guide_set_name (guide, name);
-
-  w = gtk_spin_button_get_value_as_int (GTK_SPIN_BUTTON (editor->min_width));
-  h = gtk_spin_button_get_value_as_int (GTK_SPIN_BUTTON (editor->min_height));
-  gtk_constraint_guide_set_min_size (guide, w, h);
-
-  w = gtk_spin_button_get_value_as_int (GTK_SPIN_BUTTON (editor->nat_width));
-  h = gtk_spin_button_get_value_as_int (GTK_SPIN_BUTTON (editor->nat_height));
-  gtk_constraint_guide_set_nat_size (guide, w, h);
-
-  w = gtk_spin_button_get_value_as_int (GTK_SPIN_BUTTON (editor->max_width));
-  h = gtk_spin_button_get_value_as_int (GTK_SPIN_BUTTON (editor->max_height));
-  gtk_constraint_guide_set_max_size (guide, w, h);
-
-  id = gtk_combo_box_get_active_id (GTK_COMBO_BOX (editor->strength));
-  strength = get_strength (id);
-  gtk_constraint_guide_set_strength (guide, strength);
-
-  g_signal_emit (editor, signals[DONE], 0, guide);
-  g_object_unref (guide);
-}
-
-static void
-guide_editor_init (GuideEditor *editor)
-{
-  gtk_widget_init_template (GTK_WIDGET (editor));
-}
-
-static int guide_counter;
-
-static int
-min_input (GtkSpinButton *spin_button,
-           double        *new_val)
-{
-  if (strcmp (gtk_editable_get_text (GTK_EDITABLE (spin_button)), "") == 0)
-    {
-      *new_val = 0.0;
-      return TRUE;
-    }
-
-  return FALSE;
-}
-
-static int
-max_input (GtkSpinButton *spin_button,
-           double        *new_val)
-{
-  if (strcmp (gtk_editable_get_text (GTK_EDITABLE (spin_button)), "") == 0)
-    {
-      *new_val = G_MAXINT;
-      return TRUE;
-    }
-
-  return FALSE;
-}
-
-static void
-guide_editor_constructed (GObject *object)
-{
-  GuideEditor *editor = GUIDE_EDITOR (object);
-
-  guide_strength_combo (editor->strength);
-
-  g_signal_connect (editor->min_width, "input", G_CALLBACK (min_input), NULL);
-
-  g_signal_connect (editor->min_height, "input", G_CALLBACK (min_input), NULL);
-
-  g_signal_connect (editor->max_width, "input", G_CALLBACK (max_input), NULL);
-
-  g_signal_connect (editor->max_height, "input", G_CALLBACK (max_input), NULL);
-
-  if (editor->guide)
-    {
-      GtkConstraintStrength strength;
-      const char *nick;
-      int w, h;
-
-      nick = gtk_constraint_guide_get_name (editor->guide);
-      if (nick)
-        gtk_editable_set_text (GTK_EDITABLE (editor->name), nick);
-
-      gtk_constraint_guide_get_min_size (editor->guide, &w, &h);
-      gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->min_width), w);
-      gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->min_height), h);
-
-      gtk_constraint_guide_get_nat_size (editor->guide, &w, &h);
-      gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->nat_width), w);
-      gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->nat_height), h);
-
-      gtk_constraint_guide_get_max_size (editor->guide, &w, &h);
-      gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->max_width), w);
-      gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->max_height), h);
-
-      strength = gtk_constraint_guide_get_strength (editor->guide);
-      nick = get_strength_nick (strength);
-      gtk_combo_box_set_active_id (GTK_COMBO_BOX (editor->strength), nick);
-
-      gtk_button_set_label (GTK_BUTTON (editor->button), "Apply");
-    }
-  else
-    {
-      char *name;
-
-      guide_counter++;
-      name = g_strdup_printf ("Guide %d", guide_counter);
-      gtk_editable_set_text (GTK_EDITABLE (editor->name), name);
-      g_free (name);
-
-      gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->min_width), 0.0);
-      gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->min_height), 0.0);
-      gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->nat_width), 0.0);
-      gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->nat_height), 0.0);
-      gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->max_width), G_MAXINT);
-      gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->max_height), G_MAXINT);
-
-      gtk_combo_box_set_active_id (GTK_COMBO_BOX (editor->strength), "medium");
-
-      gtk_button_set_label (GTK_BUTTON (editor->button), "Create");
-    }
-
-  editor->constructed = TRUE;
-}
-
-static void
-guide_editor_set_property (GObject      *object,
-                           guint         property_id,
-                           const GValue *value,
-                           GParamSpec   *pspec)
-{
-  GuideEditor *self = GUIDE_EDITOR (object);
-
-  switch (property_id)
-    {
-    case PROP_GUIDE:
-      self->guide = g_value_dup_object (value);
-      break;
-
-    default:
-      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
-    }
-}
-
-static void
-guide_editor_get_property (GObject    *object,
-                           guint       property_id,
-                           GValue     *value,
-                           GParamSpec *pspec)
-{
-  GuideEditor *self = GUIDE_EDITOR (object);
-
-  switch (property_id)
-    {
-    case PROP_GUIDE:
-      g_value_set_object (value, self->guide);
-      break;
-
-    default:
-      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
-    }
-}
-
-static void
-guide_editor_dispose (GObject *object)
-{
-  GuideEditor *self = (GuideEditor *)object;
-
-  g_clear_pointer (&self->grid, gtk_widget_unparent);
-  g_clear_object (&self->guide);
-
-  G_OBJECT_CLASS (guide_editor_parent_class)->dispose (object);
-}
-
-static void
-guide_editor_class_init (GuideEditorClass *class)
-{
-  GObjectClass *object_class = G_OBJECT_CLASS (class);
-  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
-
-  object_class->constructed = guide_editor_constructed;
-  object_class->dispose = guide_editor_dispose;
-  object_class->set_property = guide_editor_set_property;
-  object_class->get_property = guide_editor_get_property;
-
-  pspecs[PROP_GUIDE] =
-    g_param_spec_object ("guide", "guide", "guide",
-                         GTK_TYPE_CONSTRAINT_GUIDE,
-                         G_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY);
-
-  g_object_class_install_properties (object_class, LAST_PROP, pspecs);
-
-  signals[DONE] =
-    g_signal_new ("done",
-                  G_TYPE_FROM_CLASS (object_class),
-                  G_SIGNAL_RUN_LAST,
-                  0,
-                  NULL, NULL,
-                  NULL,
-                  G_TYPE_NONE, 1, GTK_TYPE_CONSTRAINT_GUIDE);
-
-  gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_BIN_LAYOUT);
-
-  gtk_widget_class_set_template_from_resource (widget_class,
-                                               "/org/gtk/gtk4/constraint-editor/guide-editor.ui");
-
-  gtk_widget_class_bind_template_child (widget_class, GuideEditor, grid);
-  gtk_widget_class_bind_template_child (widget_class, GuideEditor, name);
-  gtk_widget_class_bind_template_child (widget_class, GuideEditor, min_width);
-  gtk_widget_class_bind_template_child (widget_class, GuideEditor, min_height);
-  gtk_widget_class_bind_template_child (widget_class, GuideEditor, nat_width);
-  gtk_widget_class_bind_template_child (widget_class, GuideEditor, nat_height);
-  gtk_widget_class_bind_template_child (widget_class, GuideEditor, max_width);
-  gtk_widget_class_bind_template_child (widget_class, GuideEditor, max_height);
-  gtk_widget_class_bind_template_child (widget_class, GuideEditor, strength);
-  gtk_widget_class_bind_template_child (widget_class, GuideEditor, button);
-
-  gtk_widget_class_bind_template_callback (widget_class, create_guide);
-}
-
-GuideEditor *
-guide_editor_new (GtkConstraintGuide *guide)
-{
-  return g_object_new (GUIDE_EDITOR_TYPE,
-                       "guide", guide,
-                       NULL);
-}
--- a/demos/constraint-editor/guide-editor.h
+++ b/demos/constraint-editor/guide-editor.h
@@ -1,32 +0,0 @@
-/*
- * Copyright © 2019 Red Hat, Inc
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library. If not, see <http://www.gnu.org/licenses/>.
- *
- * Authors: Matthias Clasen
- */
-
-#pragma once
-
-#include <gtk/gtk.h>
-
-#define GUIDE_EDITOR_TYPE (guide_editor_get_type ())
-
-G_DECLARE_FINAL_TYPE (GuideEditor, guide_editor, GUIDE, EDITOR, GtkWidget)
-
-GuideEditor * guide_editor_new (GtkConstraintGuide  *guide);
-
-void guide_editor_serialize_guide (GString            *str,
-                                   int                 indent,
-                                   GtkConstraintGuide *guide);
--- a/demos/constraint-editor/guide-editor.ui
+++ b/demos/constraint-editor/guide-editor.ui
@@ -1,191 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<interface>
-  <object class="GtkAdjustment" id="min_width_adj">
-    <property name="lower">0</property>
-    <property name="upper">2147483647</property>
-    <property name="step-increment">1</property>
-    <property name="page-increment">10</property>
-    <property name="page-size">0</property>
-  </object>
-  <object class="GtkAdjustment" id="min_height_adj">
-    <property name="lower">0</property>
-    <property name="upper">2147483647</property>
-    <property name="step-increment">1</property>
-    <property name="page-increment">10</property>
-    <property name="page-size">0</property>
-  </object>
-  <object class="GtkAdjustment" id="nat_width_adj">
-    <property name="lower">0</property>
-    <property name="upper">2147483647</property>
-    <property name="step-increment">1</property>
-    <property name="page-increment">10</property>
-    <property name="page-size">0</property>
-  </object>
-  <object class="GtkAdjustment" id="nat_height_adj">
-    <property name="lower">0</property>
-    <property name="upper">2147483647</property>
-    <property name="step-increment">1</property>
-    <property name="page-increment">10</property>
-    <property name="page-size">0</property>
-  </object>
-  <object class="GtkAdjustment" id="max_width_adj">
-    <property name="lower">0</property>
-    <property name="upper">2147483647</property>
-    <property name="step-increment">1</property>
-    <property name="page-increment">10</property>
-    <property name="page-size">0</property>
-  </object>
-  <object class="GtkAdjustment" id="max_height_adj">
-    <property name="lower">0</property>
-    <property name="upper">2147483647</property>
-    <property name="step-increment">1</property>
-    <property name="page-increment">10</property>
-    <property name="page-size">0</property>
-  </object>
-  <template class="GuideEditor" parent="GtkWidget">
-    <child>
-      <object class="GtkGrid" id="grid">
-        <property name="margin-start">20</property>
-        <property name="margin-end">20</property>
-        <property name="margin-top">20</property>
-        <property name="margin-bottom">20</property>
-        <property name="row-spacing">10</property>
-        <property name="column-spacing">10</property>
-        <child>
-          <object class="GtkLabel">
-            <property name="label">Name</property>
-            <layout>
-              <property name="column">0</property>
-              <property name="row">0</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkEntry" id="name">
-            <property name="max-width-chars">20</property>
-            <layout>
-              <property name="column">1</property>
-              <property name="row">0</property>
-              <property name="column-span">2</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkLabel">
-            <property name="label">Min Size</property>
-            <layout>
-              <property name="column">0</property>
-              <property name="row">1</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkSpinButton" id="min_width">
-            <property name="adjustment">min_width_adj</property>
-            <property name="max-width-chars">5</property>
-            <layout>
-              <property name="column">1</property>
-              <property name="row">1</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkSpinButton" id="min_height">
-            <property name="adjustment">min_height_adj</property>
-            <property name="max-width-chars">5</property>
-            <layout>
-              <property name="column">2</property>
-              <property name="row">1</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkLabel">
-            <property name="label">Nat Size</property>
-            <layout>
-              <property name="column">0</property>
-              <property name="row">2</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkSpinButton" id="nat_width">
-            <property name="adjustment">nat_width_adj</property>
-            <property name="max-width-chars">5</property>
-            <layout>
-              <property name="column">1</property>
-              <property name="row">2</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkSpinButton" id="nat_height">
-            <property name="adjustment">nat_height_adj</property>
-            <property name="max-width-chars">5</property>
-            <layout>
-              <property name="column">2</property>
-              <property name="row">2</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkLabel">
-            <property name="label">Max Size</property>
-            <layout>
-              <property name="column">0</property>
-              <property name="row">3</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkSpinButton" id="max_width">
-            <property name="adjustment">max_width_adj</property>
-            <property name="max-width-chars">5</property>
-            <layout>
-              <property name="column">1</property>
-              <property name="row">3</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkSpinButton" id="max_height">
-            <property name="adjustment">max_height_adj</property>
-            <property name="max-width-chars">5</property>
-            <layout>
-              <property name="column">2</property>
-              <property name="row">3</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkLabel">
-            <property name="label">Strength</property>
-            <layout>
-              <property name="column">0</property>
-              <property name="row">4</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkComboBoxText" id="strength">
-            <layout>
-              <property name="column">1</property>
-              <property name="row">4</property>
-              <property name="column-span">2</property>
-            </layout>
-          </object>
-        </child>
-        <child>
-          <object class="GtkButton" id="button">
-            <property name="label">Create</property>
-            <signal name="clicked" handler="create_guide"/>
-            <layout>
-              <property name="column">2</property>
-              <property name="row">5</property>
-            </layout>
-          </object>
-        </child>
-      </object>
-    </child>
-  </template>
-</interface>
--- a/demos/constraint-editor/main.c
+++ b/demos/constraint-editor/main.c
@@ -1,28 +0,0 @@
-/*
- * Copyright © 2019 Red Hat, Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library. If not, see <http://www.gnu.org/licenses/>.
- *
- * Authors: Matthias Clasen <mclasen@redhat.com>
- */
-
-#include "config.h"
-
-#include <constraint-editor-application.h>
-
-int
-main (int argc, char *argv[])
-{
-  return g_application_run (G_APPLICATION (constraint_editor_application_new ()), argc, argv);
-}
--- a/demos/constraint-editor/meson.build
+++ b/demos/constraint-editor/meson.build
@@ -1,23 +0,0 @@
-constraint_editor_sources = [
-  'main.c',
-  'constraint-editor-application.c',
-  'constraint-editor-window.c',
-  'constraint-view.c',
-  'constraint-editor.c',
-  'guide-editor.c',
-]
-
-constraint_editor_resources = gnome.compile_resources('constraint_editor_resources',
-  'constraint-editor.gresource.xml',
-  source_dir: '.',
-)
-
-executable('gtk4-constraint-editor',
-  sources: [ constraint_editor_sources, constraint_editor_resources, ],
-  c_args: common_cflags,
-  dependencies: libgtk_dep,
-  include_directories: confinc,
-  gui_app: true,
-  link_args: extra_demo_ldflags,
-  install: false,
-)
--- a/demos/gtk-demo/alienplanet.glsl
+++ b/demos/gtk-demo/alienplanet.glsl
@@ -1,345 +0,0 @@
-// Originally from: https://www.shadertoy.com/view/wsjBD3
-// License CC0: A battered alien planet
-//  Been experimenting with space inspired shaders
-
-#define PI  3.141592654
-#define TAU (2.0*PI)
-
-#define TOLERANCE       0.00001
-#define MAX_ITER        65
-#define MIN_DISTANCE    0.01
-#define MAX_DISTANCE    9.0
-
-const vec3  skyCol1       = vec3(0.35, 0.45, 0.6);
-const vec3  skyCol2       = vec3(0.4, 0.7, 1.0);
-const vec3  skyCol3       = pow(skyCol1, vec3(0.25));
-const vec3  sunCol1       = vec3(1.0,0.6,0.4);
-const vec3  sunCol2       = vec3(1.0,0.9,0.7);
-const vec3  smallSunCol1  = vec3(1.0,0.5,0.25)*0.5;
-const vec3  smallSunCol2  = vec3(1.0,0.5,0.25)*0.5;
-const vec3  mountainColor = 1.0*sqrt(vec3(0.95, 0.65, 0.45));
-const float cellWidth     = 1.0;
-const vec4  planet        = vec4(80.0, -20.0, 100.0, 50.0)*1000.0;
-
-void rot(inout vec2 p, float a) {
-  float c = cos(a);
-  float s = sin(a);
-  p = vec2(p.x*c + p.y*s, -p.x*s + p.y*c);
-}
-
-vec2 mod2(inout vec2 p, vec2 size) {
-  vec2 c = floor((p + size*0.5)/size);
-  p = mod(p + size*0.5,size) - size*0.5;
-  return c;
-}
-
-float circle(vec2 p, float r) {
-  return length(p) - r;
-}
-
-float egg(vec2 p, float ra, float rb) {
-  const float k = sqrt(3.0);
-  p.x = abs(p.x);
-  float r = ra - rb;
-  return ((p.y<0.0)       ? length(vec2(p.x,  p.y    )) - r :
-          (k*(p.x+r)<p.y) ? length(vec2(p.x,  p.y-k*r)) :
-                              length(vec2(p.x+r,p.y    )) - 2.0*r) - rb;
-}
-
-vec2 hash(vec2 p) {
-  p = vec2(dot (p, vec2 (127.1, 311.7)), dot (p, vec2 (269.5, 183.3)));
-  return -1. + 2.*fract (sin (p)*43758.5453123);
-}
-
-vec2 raySphere(vec3 ro, vec3 rd, vec4 sphere) {
-  vec3 center = sphere.xyz;
-  float radius = sphere.w;
-  vec3 m = ro - center.xyz;
-  float b = dot(m, rd);
-  float c = dot(m, m) - radius*radius;
-  if(c > 0.0 && b > 0.0) return vec2(-1.0, -1.0);
-  float discr = b * b - c;
-  if(discr < 0.0) return vec2(-1.0);
-  float normalMultiplier = 1.0;
-  float s = sqrt(discr);
-  float t0 = -b - s;
-  float t1 = -b + s;;
-  return vec2(t0, t1);
-}
-
-float noize1(vec2 p) {
-  vec2 n = mod2(p, vec2(cellWidth));
-  vec2 hh = hash(sqrt(2.0)*(n+1000.0));
-  hh.x *= hh.y;
-
-  float r = 0.225*cellWidth;
-
-  float d = circle(p, 2.0*r);
-
-  float h = hh.x*smoothstep(0.0, r, -d);
-
-  return h*0.25;
-}
-
-float noize2(vec2 p) {
-  vec2 n = mod2(p, vec2(cellWidth));
-  vec2 hh = hash(sqrt(2.0)*(n+1000.0));
-  hh.x *= hh.y;
-
-  rot(p, TAU*hh.y);
-  float r = 0.45*cellWidth;
-
-//  float d = circle(p, 1.0*r);
-  float d = egg(p, 0.75*r, 0.5*r*abs(hh.y));
-
-  float h = (hh.x)*smoothstep(0.0, r, -2.0*d);
-
-  return h*0.275;
-}
-
-
-float height(vec2 p, float dd, int mx) {
-  const float aa   = 0.45;
-  const float ff   = 2.03;
-  const float tt   = 1.2;
-  const float oo   = 3.93;
-  const float near = 0.25;
-  const float far  = 0.65;
-
-  float a = 1.0;
-  float o = 0.2;
-  float s = 0.0;
-  float d = 0.0;
-
-  int i = 0;
-
-  for (; i < 4;++i) {
-    float nn = a*noize2(p);
-    s += nn;
-    d += abs(a);
-    p += o;
-    a *= aa;
-    p *= ff;
-    o *= oo;
-    rot(p, tt);
-  }
-
-  float lod = s/d;
-
-  float rdd = dd/MAX_DISTANCE;
-  mx = int(mix(float(4), float(mx), step(rdd, far)));
-
-  for (; i < mx; ++i) {
-    float nn = a*noize1(p);
-    s += nn;
-    d += abs(a);
-    p += o;
-    a *= aa;
-    p *= ff;
-    o *= oo;
-    rot(p, tt);
-  }
-
-  float hid = (s/d);
-
-  return mix(hid, lod, smoothstep(near, far, rdd));
-}
-
-float loheight(vec2 p, float d) {
-  return height(p, d, 0);
-}
-
-float height(vec2 p, float d) {
-  return height(p, d, 6);
-}
-
-float hiheight(vec2 p, float d) {
-  return height(p, d, 8);
-}
-
-vec3 normal(vec2 p, float d) {
-  vec2 eps = vec2(0.00125, 0.0);
-
-  vec3 n;
-
-  n.x = (hiheight(p - eps.xy, d) - hiheight(p + eps.xy, d));
-  n.y = 2.0*eps.x;
-  n.z = (hiheight(p - eps.yx, d) - hiheight(p + eps.yx, d));
-
-  return normalize(n);
-}
-
-const float stepLength[] = float[](0.9, 0.25);
-
-
-float march(vec3 ro, vec3 rd, out int max_iter) {
-  float dt = 0.1;
-  float d = MIN_DISTANCE;
-  int currentStep = 0;
-  float lastd = d;
-  for (int i = 0; i < MAX_ITER; ++i)
-  {
-    vec3 p = ro + d*rd;
-    float h = height(p.xz, d);
-
-    if (d > MAX_DISTANCE) {
-      max_iter = i;
-      return MAX_DISTANCE;
-    }
-
-    float hd = p.y - h;
-
-    if (hd < TOLERANCE) {
-      ++currentStep;
-      if (currentStep >= stepLength.length()) {
-        max_iter = i;
-        return d;
-      }
-
-      d = lastd;
-      continue;
-    }
-
-    float sl = stepLength[currentStep];
-
-    dt = max(hd, TOLERANCE)*sl + 0.0025*d;
-    lastd = d;
-    d += dt;
-  }
-
-  max_iter = MAX_ITER;
-  return MAX_DISTANCE;
-}
-
-vec3 sunDirection() {
-  return normalize(vec3(-0.5, 0.085, 1.0));
-}
-
-vec3 smallSunDirection() {
-  return normalize(vec3(-0.2, -0.05, 1.0));
-}
-
-float psin(float f) {
-  return 0.5 + 0.5*sin(f);
-}
-
-vec3 skyColor(vec3 ro, vec3 rd) {
-  vec3 sunDir = sunDirection();
-  vec3 smallSunDir = smallSunDirection();
-
-  float sunDot = max(dot(rd, sunDir), 0.0);
-  float smallSunDot = max(dot(rd, smallSunDir), 0.0);
-
-  float angle = atan(rd.y, length(rd.xz))*2.0/PI;
-
-  vec3 skyCol = mix(mix(skyCol1, skyCol2, max(0.0, angle)), skyCol3, clamp(-angle*2.0, 0.0, 1.0));
-
-  vec3 sunCol = 0.5*sunCol1*pow(sunDot, 20.0) + 8.0*sunCol2*pow(sunDot, 2000.0);
-  vec3 smallSunCol = 0.5*smallSunCol1*pow(smallSunDot, 200.0) + 8.0*smallSunCol2*pow(smallSunDot, 20000.0);
-
-  vec3 dust = pow(sunCol2*mountainColor, vec3(1.75))*smoothstep(0.05, -0.1, rd.y)*0.5;
-
-  vec2 si = raySphere(ro, rd, planet);
-
-  vec3 planetSurface = ro + si.x*rd;
-  vec3 planetNormal = normalize(planetSurface - planet.xyz);
-  float planetDiff = max(dot(planetNormal, sunDir), 0.0);
-  float planetBorder = max(dot(planetNormal, -rd), 0.0);
-  float planetLat = (planetSurface.x+planetSurface.y)*0.0005;
-  vec3 planetCol = mix(1.3*vec3(0.9, 0.8, 0.7), 0.3*vec3(0.9, 0.8, 0.7), pow(psin(planetLat+1.0)*psin(sqrt(2.0)*planetLat+2.0)*psin(sqrt(3.5)*planetLat+3.0), 0.5));
-
-  vec3 final = vec3(0.0);
-
-  final += step(0.0, si.x)*pow(planetDiff, 0.75)*planetCol*smoothstep(-0.075, 0.0, rd.y)*smoothstep(0.0, 0.1, planetBorder);
-
-  final += skyCol + sunCol + smallSunCol + dust;
-
-  return final;
-}
-
-vec3 getColor(vec3 ro, vec3 rd) {
-  int max_iter = 0;
-  vec3 skyCol = skyColor(ro, rd);
-  vec3 col = vec3(0);
-
-  float d = march(ro, rd, max_iter);
-
-  if (d < MAX_DISTANCE)   {
-    vec3 sunDir = sunDirection();
-    vec3 osunDir = sunDir*vec3(-1.0, .0, -1.0);
-    vec3 p = ro + d*rd;
-
-    vec3 normal = normal(p.xz, d);
-
-    float amb = 0.2;
-
-    float dif1 = max(0.0, dot(sunDir, normal));
-    vec3 shd1 = sunCol2*mix(amb, 1.0, pow(dif1, 0.75));
-
-    float dif2 = max(0.0, dot(osunDir, normal));
-    vec3 shd2 = sunCol1*mix(amb, 1.0, pow(dif2, 0.75));
-
-    vec3 ref = reflect(rd, normal);
-    vec3 rcol = skyColor(p, ref);
-
-    col = mountainColor*amb*skyCol3;
-    col += mix(shd1, shd2, -0.5)*mountainColor;
-    float fre = max(dot(normal, -rd), 0.0);
-    fre = pow(1.0 - fre, 5.0);
-    col += rcol*fre*0.5;
-    col += (1.0*p.y);
-    col = tanh(col);
-    col = mix(col, skyCol, smoothstep(0.5*MAX_DISTANCE, 1.0*MAX_DISTANCE, d));
-
-  } else {
-    col = skyCol;
-  }
-
-//  col += vec3(1.1, 0.0, 0.0)* smoothstep(0.25, 1.0,(float(max_iter)/float(MAX_ITER)));
-  return col;
-}
-
-vec3 getSample1(vec2 p, float time) {
-  float off = 0.5*iTime;
-
-  vec3 ro  = vec3(0.5, 1.0-0.25, -2.0 + off);
-  vec3 la  = ro + vec3(0.0, -0.30,  2.0);
-
-  vec3 ww = normalize(la - ro);
-  vec3 uu = normalize(cross(vec3(0.0,1.0,0.0), ww));
-  vec3 vv = normalize(cross(ww, uu));
-  vec3 rd = normalize(p.x*uu + p.y*vv + 2.0*ww);
-
-  vec3 col = getColor(ro, rd)  ;
-
-  return col;
-}
-
-vec3 getSample2(vec2 p, float time) {
-  p.y-=time*0.25;
-  float h = height(p, 0.0);
-  vec3 n = normal(p, 0.0);
-
-  vec3 lp = vec3(10.0, -1.2, 0.0);
-
-  vec3 ld = normalize(vec3(p.x, h, p.y)- lp);
-
-  float d = max(dot(ld, n), 0.0);
-
-  vec3 col = vec3(0.0);
-
-  col = vec3(1.0)*(h+0.1);
-  col += vec3(1.5)*pow(d, 0.75);
-
-  return col;
-}
-
-void mainImage(out vec4 fragColor, vec2 fragCoord) {
-  vec2 q = fragCoord.xy/iResolution.xy;
-  vec2 p = -1.0 + 2.0*q;
-  p.x *= iResolution.x/iResolution.y;
-
-  vec3 col = getSample1(p, iTime);
-
-  fragColor = vec4(col, 1.0);
-}
--- a/demos/gtk-demo/application.c
+++ b/demos/gtk-demo/application.c
@@ -1,3 +1,4 @@
+
 #include "config.h"

 #include <gtk/gtk.h>
@@ -5,7 +6,6 @@
 typedef GtkApplication DemoApplication;
 typedef GtkApplicationClass DemoApplicationClass;

-static GType demo_application_get_type (void);
 G_DEFINE_TYPE (DemoApplication, demo_application, GTK_TYPE_APPLICATION)

 typedef struct {
@@ -14,7 +14,7 @@ typedef struct {
  GtkWidget *message;
  GtkWidget *infobar;
  GtkWidget *status;
-  GtkWidget *menubutton;
+  GtkWidget *menutool;
  GMenuModel *toolmenu;
  GtkTextBuffer *buffer;

@@ -25,7 +25,6 @@ typedef struct {
 } DemoApplicationWindow;
 typedef GtkApplicationWindowClass DemoApplicationWindowClass;

-static GType demo_application_window_get_type (void);
 G_DEFINE_TYPE (DemoApplicationWindow, demo_application_window, GTK_TYPE_APPLICATION_WINDOW)

 static void create_window (GApplication *app, const char *contents);
@@ -33,7 +32,7 @@ static void create_window (GApplication *app, const char *contents);
 static void
 show_action_dialog (GSimpleAction *action)
 {
-  const char *name;
+  const gchar *name;
  GtkWidget *dialog;

  name = g_action_get_name (G_ACTION (action));
@@ -46,7 +45,7 @@ show_action_dialog (GSimpleAction *action)
                                    name);

  g_signal_connect (dialog, "response",
-                    G_CALLBACK (gtk_window_destroy), NULL);
+                    G_CALLBACK (gtk_widget_destroy), NULL);

  gtk_widget_show (dialog);
 }
@@ -57,9 +56,9 @@ show_action_infobar (GSimpleAction *action,
                     gpointer       data)
 {
  DemoApplicationWindow *window = data;
-  char *text;
-  const char *name;
-  const char *value;
+  gchar *text;
+  const gchar *name;
+  const gchar *value;

  name = g_action_get_name (G_ACTION (action));
  value = g_variant_get_string (parameter, NULL);
@@ -91,7 +90,7 @@ activate_new (GSimpleAction *action,

 static void
 open_response_cb (GtkNativeDialog *dialog,
-                  int              response_id,
+                  gint             response_id,
                  gpointer         user_data)
 {
  GtkFileChooserNative *native = user_data;
@@ -119,7 +118,7 @@ open_response_cb (GtkNativeDialog *dialog,
                                                   "Error loading file: \"%s\"",
                                                   error->message);
          g_signal_connect (message_dialog, "response",
-                            G_CALLBACK (gtk_window_destroy), NULL);
+                            G_CALLBACK (gtk_widget_destroy), NULL);
          gtk_widget_show (message_dialog);
          g_error_free (error);
        }
@@ -184,7 +183,7 @@ activate_about (GSimpleAction *action,
 {
  GtkWidget *window = user_data;

-  const char *authors[] = {
+  const gchar *authors[] = {
    "Peter Mattis",
    "Spencer Kimball",
    "Josh MacDonald",
@@ -192,7 +191,7 @@ activate_about (GSimpleAction *action,
    NULL
  };

-  const char *documentors[] = {
+  const gchar *documentors[] = {
    "Owen Taylor",
    "Tony Gale",
    "Matthias Clasen <mclasen@redhat.com>",
@@ -201,20 +200,20 @@ activate_about (GSimpleAction *action,
  };

  gtk_show_about_dialog (GTK_WINDOW (window),
-                         "program-name", "GTK Code Demos",
-                         "version", g_strdup_printf ("%s,\nRunning against GTK %d.%d.%d",
+                         "program-name", "GTK+ Code Demos",
+                         "version", g_strdup_printf ("%s,\nRunning against GTK+ %d.%d.%d",
                                                     PACKAGE_VERSION,
                                                     gtk_get_major_version (),
                                                     gtk_get_minor_version (),
                                                     gtk_get_micro_version ()),
-                         "copyright", "(C) 1997-2013 The GTK Team",
+                         "copyright", "(C) 1997-2013 The GTK+ Team",
                         "license-type", GTK_LICENSE_LGPL_2_1,
                         "website", "http://www.gtk.org",
-                         "comments", "Program to demonstrate GTK functions.",
+                         "comments", "Program to demonstrate GTK+ functions.",
                         "authors", authors,
                         "documenters", documentors,
-                         "logo-icon-name", "org.gtk.Demo4",
-                         "title", "About GTK Code Demos",
+                         "logo-icon-name", "gtk4-demo",
+                         "title", "About GTK+ Code Demos",
                         NULL);
 }

@@ -233,7 +232,7 @@ activate_quit (GSimpleAction *action,
      win = list->data;
      next = list->next;

-      gtk_window_destroy (GTK_WINDOW (win));
+      gtk_widget_destroy (GTK_WIDGET (win));

      list = next;
    }
@@ -243,9 +242,9 @@ static void
 update_statusbar (GtkTextBuffer         *buffer,
                  DemoApplicationWindow *window)
 {
-  char *msg;
-  int row, col;
-  int count;
+  gchar *msg;
+  gint row, col;
+  gint count;
  GtkTextIter iter;

  /* clear any previous message, underflow is allowed */
@@ -327,14 +326,19 @@ static void
 startup (GApplication *app)
 {
  GtkBuilder *builder;
+  GMenuModel *appmenu;
+  GMenuModel *menubar;

  G_APPLICATION_CLASS (demo_application_parent_class)->startup (app);

  builder = gtk_builder_new ();
  gtk_builder_add_from_resource (builder, "/application_demo/menus.ui", NULL);

-  gtk_application_set_menubar (GTK_APPLICATION (app),
-                               G_MENU_MODEL (gtk_builder_get_object (builder, "menubar")));
+  appmenu = (GMenuModel *)gtk_builder_get_object (builder, "appmenu");
+  menubar = (GMenuModel *)gtk_builder_get_object (builder, "menubar");
+
+  gtk_application_set_app_menu (GTK_APPLICATION (app), appmenu);
+  gtk_application_set_menubar (GTK_APPLICATION (app), menubar);

  g_object_unref (builder);
 }
@@ -347,7 +351,6 @@ create_window (GApplication *app,

  window = (DemoApplicationWindow *)g_object_new (demo_application_window_get_type (),
                                                  "application", app,
-                                                  "show-menubar", TRUE,
                                                  NULL);
  if (content)
    gtk_text_buffer_set_text (window->buffer, content, -1);
@@ -367,7 +370,7 @@ demo_application_init (DemoApplication *app)
  GSettings *settings;
  GAction *action;

-  settings = g_settings_new ("org.gtk.Demo4");
+  settings = g_settings_new ("org.gtk.Demo");

  g_action_map_add_action_entries (G_ACTION_MAP (app),
                                   app_entries, G_N_ELEMENTS (app_entries),
@@ -394,7 +397,7 @@ demo_application_window_store_state (DemoApplicationWindow *win)
 {
  GSettings *settings;

-  settings = g_settings_new ("org.gtk.Demo4");
+  settings = g_settings_new ("org.gtk.Demo");
  g_settings_set (settings, "window-size", "(ii)", win->width, win->height);
  g_settings_set_boolean (settings, "maximized", win->maximized);
  g_settings_set_boolean (settings, "fullscreen", win->fullscreen);
@@ -406,7 +409,7 @@ demo_application_window_load_state (DemoApplicationWindow *win)
 {
  GSettings *settings;

-  settings = g_settings_new ("org.gtk.Demo4");
+  settings = g_settings_new ("org.gtk.Demo");
  g_settings_get (settings, "window-size", "(ii)", &win->width, &win->height);
  win->maximized = g_settings_get_boolean (settings, "maximized");
  win->fullscreen = g_settings_get_boolean (settings, "fullscreen");
@@ -416,7 +419,7 @@ demo_application_window_load_state (DemoApplicationWindow *win)
 static void
 demo_application_window_init (DemoApplicationWindow *window)
 {
-  GtkWidget *popover;
+  GtkWidget *menu;

  window->width = -1;
  window->height = -1;
@@ -425,8 +428,8 @@ demo_application_window_init (DemoApplicationWindow *window)

  gtk_widget_init_template (GTK_WIDGET (window));

-  popover = gtk_popover_menu_new_from_model (window->toolmenu);
-  gtk_menu_button_set_popover (GTK_MENU_BUTTON (window->menubutton), popover);
+  menu = gtk_menu_new_from_model (window->toolmenu);
+  gtk_menu_tool_button_set_menu (GTK_MENU_TOOL_BUTTON (window->menutool), menu);

  g_action_map_add_action_entries (G_ACTION_MAP (window),
                                   win_entries, G_N_ELEMENTS (win_entries),
@@ -452,31 +455,28 @@ demo_application_window_constructed (GObject *object)
 }

 static void
-demo_application_window_size_allocate (GtkWidget *widget,
-                                       int        width,
-                                       int        height,
-                                       int        baseline)
+demo_application_window_size_allocate (GtkWidget           *widget,
+                                       const GtkAllocation *allocation,
+                                       int                  baseline)
 {
  DemoApplicationWindow *window = (DemoApplicationWindow *)widget;

-  GTK_WIDGET_CLASS (demo_application_window_parent_class)->size_allocate (widget,
-                                                                          width,
-                                                                          height,
+  GTK_WIDGET_CLASS (demo_application_window_parent_class)->size_allocate (widget, allocation,
                                                                          baseline);

  if (!window->maximized && !window->fullscreen)
-    gtk_window_get_default_size (GTK_WINDOW (window), &window->width, &window->height);
+    gtk_window_get_size (GTK_WINDOW (window), &window->width, &window->height);
 }

 static void
 surface_state_changed (GtkWidget *widget)
 {
  DemoApplicationWindow *window = (DemoApplicationWindow *)widget;
-  GdkToplevelState new_state;
+  GdkSurfaceState new_state;

-  new_state = gdk_toplevel_get_state (GDK_TOPLEVEL (gtk_native_get_surface (GTK_NATIVE (widget))));
-  window->maximized = (new_state & GDK_TOPLEVEL_STATE_MAXIMIZED) != 0;
-  window->fullscreen = (new_state & GDK_TOPLEVEL_STATE_FULLSCREEN) != 0;
+  new_state = gdk_surface_get_state (gtk_widget_get_surface (widget));
+  window->maximized = (new_state & GDK_SURFACE_STATE_MAXIMIZED) != 0;
+  window->fullscreen = (new_state & GDK_SURFACE_STATE_FULLSCREEN) != 0;
 }

 static void
@@ -484,27 +484,27 @@ demo_application_window_realize (GtkWidget *widget)
 {
  GTK_WIDGET_CLASS (demo_application_window_parent_class)->realize (widget);

-  g_signal_connect_swapped (gtk_native_get_surface (GTK_NATIVE (widget)), "notify::state",
+  g_signal_connect_swapped (gtk_widget_get_surface (widget), "notify::state",
                            G_CALLBACK (surface_state_changed), widget);
 }

 static void
 demo_application_window_unrealize (GtkWidget *widget)
 {
-  g_signal_handlers_disconnect_by_func (gtk_native_get_surface (GTK_NATIVE (widget)),
+  g_signal_handlers_disconnect_by_func (gtk_widget_get_surface (widget),
                                        surface_state_changed, widget);

  GTK_WIDGET_CLASS (demo_application_window_parent_class)->unrealize (widget);
 }

 static void
-demo_application_window_dispose (GObject *object)
+demo_application_window_destroy (GtkWidget *widget)
 {
-  DemoApplicationWindow *window = (DemoApplicationWindow *)object;
+  DemoApplicationWindow *window = (DemoApplicationWindow *)widget;

  demo_application_window_store_state (window);

-  G_OBJECT_CLASS (demo_application_window_parent_class)->dispose (object);
+  GTK_WIDGET_CLASS (demo_application_window_parent_class)->destroy (widget);
 }

 static void
@@ -514,18 +514,18 @@ demo_application_window_class_init (DemoApplicationWindowClass *class)
  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);

  object_class->constructed = demo_application_window_constructed;
-  object_class->dispose = demo_application_window_dispose;

  widget_class->size_allocate = demo_application_window_size_allocate;
  widget_class->realize = demo_application_window_realize;
  widget_class->unrealize = demo_application_window_unrealize;
+  widget_class->destroy = demo_application_window_destroy;

  gtk_widget_class_set_template_from_resource (widget_class, "/application_demo/application.ui");
  gtk_widget_class_bind_template_child (widget_class, DemoApplicationWindow, message);
  gtk_widget_class_bind_template_child (widget_class, DemoApplicationWindow, infobar);
  gtk_widget_class_bind_template_child (widget_class, DemoApplicationWindow, status);
  gtk_widget_class_bind_template_child (widget_class, DemoApplicationWindow, buffer);
-  gtk_widget_class_bind_template_child (widget_class, DemoApplicationWindow, menubutton);
+  gtk_widget_class_bind_template_child (widget_class, DemoApplicationWindow, menutool);
  gtk_widget_class_bind_template_child (widget_class, DemoApplicationWindow, toolmenu);
  gtk_widget_class_bind_template_callback (widget_class, clicked_cb);
  gtk_widget_class_bind_template_callback (widget_class, update_statusbar);
@@ -538,7 +538,7 @@ main (int argc, char *argv[])
  GtkApplication *app;

  app = GTK_APPLICATION (g_object_new (demo_application_get_type (),
-                                       "application-id", "org.gtk.Demo4.App",
+                                       "application-id", "org.gtk.Demo2",
                                       "flags", G_APPLICATION_HANDLES_OPEN,
                                       NULL));

--- a/demos/gtk-demo/application.ui
+++ b/demos/gtk-demo/application.ui
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="UTF-8"?>
+<?xml version="1.0"?>
 <interface>
  <template class="DemoApplicationWindow" parent="GtkApplicationWindow">
    <property name="title" translatable="yes">Application Class</property>
@@ -8,60 +8,72 @@
    <child>
      <object class="GtkGrid">
        <child>
-          <object class="GtkBox">
+          <object class="GtkToolbar">
            <property name="hexpand">1</property>
+            <style>
+              <class name="primary-toolbar"/>
+            </style>
            <child>
-              <object class="GtkMenuButton" id="menubutton">
+              <object class="GtkMenuToolButton" id="menutool">
                <property name="icon-name">document-open</property>
              </object>
            </child>
            <child>
-              <object class="GtkButton">
+              <object class="GtkToolButton">
                <property name="icon-name">application-exit</property>
                <property name="action-name">app.quit</property>
              </object>
            </child>
            <child>
-              <object class="GtkSeparator"/>
+              <object class="GtkSeparatorToolItem">
+              </object>
            </child>
            <child>
-              <object class="GtkButton">
+              <object class="GtkToolButton">
                <property name="icon-name">applications-other</property>
                <property name="action-name">win.logo</property>
              </object>
            </child>
-            <layout>
-              <property name="column">0</property>
-              <property name="row">0</property>
-            </layout>
          </object>
+          <packing>
+            <property name="left-attach">0</property>
+            <property name="top-attach">0</property>
+          </packing>
        </child>
        <child>
          <object class="GtkInfoBar" id="infobar">
            <property name="visible">0</property>
            <property name="hexpand">1</property>
-            <child>
-              <object class="GtkLabel" id="message">
-                <property name="hexpand">1</property>
+            <child internal-child="content_area">
+              <object class="GtkBox" id="content_area">
+                <child>
+                  <object class="GtkLabel" id="message">
+                    <property name="hexpand">1</property>
+                  </object>
+                </child>
              </object>
            </child>
-            <child type="action">
-              <object class="GtkButton">
-                <property name="valign">center</property>
-                <property name="label" translatable="yes">_OK</property>
-                <property name="use-underline">1</property>
-                <signal name="clicked" handler="clicked_cb"/>
+            <child internal-child="action_area">
+              <object class="GtkBox">
+                <child>
+                  <object class="GtkButton">
+                    <property name="valign">center</property>
+                    <property name="label" translatable="yes">_OK</property>
+                    <property name="use-underline">1</property>
+                    <signal name="clicked" handler="clicked_cb"/>
+                  </object>
+                </child>
              </object>
            </child>
-            <layout>
-              <property name="column">0</property>
-              <property name="row">1</property>
-            </layout>
          </object>
+          <packing>
+            <property name="left-attach">0</property>
+            <property name="top-attach">1</property>
+          </packing>
        </child>
        <child>
          <object class="GtkScrolledWindow">
-            <property name="has-frame">1</property>
+            <property name="shadow-type">in</property>
            <child>
              <object class="GtkTextView">
                <property name="hexpand">1</property>
@@ -69,20 +81,20 @@
                <property name="buffer">buffer</property>
              </object>
            </child>
-            <layout>
-              <property name="column">0</property>
-              <property name="row">2</property>
-            </layout>
          </object>
+          <packing>
+            <property name="left-attach">0</property>
+            <property name="top-attach">2</property>
+          </packing>
        </child>
        <child>
          <object class="GtkStatusbar" id="status">
            <property name="hexpand">1</property>
-            <layout>
-              <property name="column">0</property>
-              <property name="row">3</property>
-            </layout>
          </object>
+          <packing>
+            <property name="left-attach">0</property>
+            <property name="top-attach">3</property>
+          </packing>
        </child>
      </object>
    </child>
--- a/demos/gtk-demo/application_demo.c
+++ b/demos/gtk-demo/application_demo.c
@@ -16,8 +16,8 @@ static GtkWidget *placeholder;

 static void
 on_name_appeared (GDBusConnection *connection,
-                  const char      *name,
-                  const char      *name_owner,
+                  const gchar     *name,
+                  const gchar     *name_owner,
                  gpointer         user_data)
 {
  name_seen = TRUE;
@@ -25,13 +25,18 @@ on_name_appeared (GDBusConnection *connection,

 static void
 on_name_vanished (GDBusConnection *connection,
-                  const char      *name,
+                  const gchar     *name,
                  gpointer         user_data)
 {
  if (!name_seen)
    return;

-  g_clear_object (&placeholder);
+  if (placeholder)
+    {
+      gtk_widget_destroy (placeholder);
+      g_object_unref (placeholder);
+      placeholder = NULL;
+    }
 }

 #ifdef G_OS_WIN32
@@ -47,7 +52,7 @@ do_application_demo (GtkWidget *toplevel)

  if (watch == 0)
    watch = g_bus_watch_name (G_BUS_TYPE_SESSION,
-                              "org.gtk.Demo4.App",
+                              "org.gtk.Demo2",
                              0,
                              on_name_appeared,
                              on_name_vanished,
@@ -55,7 +60,7 @@ do_application_demo (GtkWidget *toplevel)

  if (placeholder == NULL)
    {
-      const char *command;
+      const gchar *command;
      GError *error = NULL;

      if (g_file_test ("./gtk4-demo-application" APP_EXTENSION, G_FILE_TEST_IS_EXECUTABLE))
@@ -75,8 +80,8 @@ do_application_demo (GtkWidget *toplevel)
  else
    {
      g_dbus_connection_call_sync (g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, NULL),
-                                   "org.gtk.Demo4.App",
-                                   "/org/gtk/Demo4/App",
+                                   "org.gtk.Demo2",
+                                   "/org/gtk/Demo2",
                                   "org.gtk.Actions",
                                   "Activate",
                                   g_variant_new ("(sava{sv})", "quit", NULL, NULL),
--- a/demos/gtk-demo/appmenu.ui
+++ b/demos/gtk-demo/appmenu.ui
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <!-- interface-requires gtk+ 3.10 -->
+  <menu id="appmenu">
+    <section>
+      <item>
+        <attribute name="label" translatable="yes">About</attribute>
+        <attribute name="action">app.about</attribute>
+      </item>
+    </section>
+    <section>
+      <item>
+        <attribute name="label" translatable="yes">_Quit</attribute>
+        <attribute name="action">app.quit</attribute>
+        <attribute name="accel">&lt;Primary&gt;q</attribute>
+      </item>
+    </section>
+  </menu>
+</interface>
--- a/demos/gtk-demo/assistant.c
+++ b/demos/gtk-demo/assistant.c
@@ -1,18 +1,19 @@
 /* Assistant
 *
- * Demonstrates a sample multi-step assistant with GtkAssistant. Assistants
- * are used to divide an operation into several simpler sequential steps,
- * and to guide the user through these steps.
+ * Demonstrates a sample multi-step assistant. Assistants are used to divide
+ * an operation into several simpler sequential steps, and to guide the user
+ * through these steps.
 */

 #include <gtk/gtk.h>

+static GtkWidget *assistant = NULL;
 static GtkWidget *progress_bar = NULL;

 static gboolean
 apply_changes_gradually (gpointer data)
 {
-  double fraction;
+  gdouble fraction;

  /* Work, work, work... */
  fraction = gtk_progress_bar_get_fraction (GTK_PROGRESS_BAR (progress_bar));
@@ -26,7 +27,8 @@ apply_changes_gradually (gpointer data)
  else
    {
      /* Close automatically once changes are fully applied. */
-      gtk_window_destroy (GTK_WINDOW (data));
+      gtk_widget_destroy (assistant);
+      assistant = NULL;
      return G_SOURCE_REMOVE;
    }
 }
@@ -35,20 +37,23 @@ static void
 on_assistant_apply (GtkWidget *widget, gpointer data)
 {
  /* Start a timer to simulate changes taking a few seconds to apply. */
-  g_timeout_add (100, apply_changes_gradually, widget);
+  g_timeout_add (100, apply_changes_gradually, NULL);
 }

 static void
 on_assistant_close_cancel (GtkWidget *widget, gpointer data)
 {
-  gtk_window_destroy (GTK_WINDOW (widget));
+  GtkWidget **assistant = (GtkWidget **) data;
+
+  gtk_widget_destroy (*assistant);
+  *assistant = NULL;
 }

 static void
 on_assistant_prepare (GtkWidget *widget, GtkWidget *page, gpointer data)
 {
-  int current_page, n_pages;
-  char *title;
+  gint current_page, n_pages;
+  gchar *title;

  current_page = gtk_assistant_get_current_page (GTK_ASSISTANT (widget));
  n_pages = gtk_assistant_get_n_pages (GTK_ASSISTANT (widget));
@@ -70,12 +75,12 @@ on_entry_changed (GtkWidget *widget, gpointer data)
 {
  GtkAssistant *assistant = GTK_ASSISTANT (data);
  GtkWidget *current_page;
-  int page_number;
-  const char *text;
+  gint page_number;
+  const gchar *text;

  page_number = gtk_assistant_get_current_page (assistant);
  current_page = gtk_assistant_get_nth_page (assistant, page_number);
-  text = gtk_editable_get_text (GTK_EDITABLE (widget));
+  text = gtk_entry_get_text (GTK_ENTRY (widget));

  if (text && *text)
    gtk_assistant_set_page_complete (assistant, current_page, TRUE);
@@ -89,21 +94,14 @@ create_page1 (GtkWidget *assistant)
  GtkWidget *box, *label, *entry;

  box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 12);
-  gtk_widget_set_margin_start (box, 12);
-  gtk_widget_set_margin_end (box, 12);
-  gtk_widget_set_margin_top (box, 12);
-  gtk_widget_set_margin_bottom (box, 12);

  label = gtk_label_new ("You must fill out this entry to continue:");
-  gtk_box_append (GTK_BOX (box), label);
+  gtk_box_pack_start (GTK_BOX (box), label);

  entry = gtk_entry_new ();
-  gtk_accessible_update_relation (GTK_ACCESSIBLE (entry),
-                                  GTK_ACCESSIBLE_RELATION_LABELLED_BY, label, NULL,
-                                  -1);
  gtk_entry_set_activates_default (GTK_ENTRY (entry), TRUE);
  gtk_widget_set_valign (entry, GTK_ALIGN_CENTER);
-  gtk_box_append (GTK_BOX (box), entry);
+  gtk_box_pack_start (GTK_BOX (box), entry);
  g_signal_connect (G_OBJECT (entry), "changed",
                    G_CALLBACK (on_entry_changed), assistant);

@@ -117,16 +115,11 @@ create_page2 (GtkWidget *assistant)
 {
  GtkWidget *box, *checkbutton;

-  box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 12);
-  gtk_widget_set_margin_start (box, 12);
-  gtk_widget_set_margin_end (box, 12);
-  gtk_widget_set_margin_top (box, 12);
-  gtk_widget_set_margin_bottom (box, 12);
+  box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);

  checkbutton = gtk_check_button_new_with_label ("This is optional data, you may continue "
                                                 "even if you do not check this");
-  gtk_widget_set_valign (checkbutton, GTK_ALIGN_CENTER);
-  gtk_box_append (GTK_BOX (box), checkbutton);
+  gtk_box_pack_start (GTK_BOX (box), checkbutton);

  gtk_assistant_append_page (GTK_ASSISTANT (assistant), box);
  gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), box, TRUE);
@@ -171,8 +164,6 @@ create_page4 (GtkWidget *assistant)
 GtkWidget*
 do_assistant (GtkWidget *do_widget)
 {
-  static GtkWidget *assistant;
-
  if (!assistant)
    {
      assistant = gtk_assistant_new ();
@@ -181,7 +172,6 @@ do_assistant (GtkWidget *do_widget)

      gtk_window_set_display (GTK_WINDOW (assistant),
                              gtk_widget_get_display (do_widget));
-      g_object_add_weak_pointer (G_OBJECT (assistant), (gpointer *)&assistant);

      create_page1 (assistant);
      create_page2 (assistant);
@@ -189,9 +179,9 @@ do_assistant (GtkWidget *do_widget)
      create_page4 (assistant);

      g_signal_connect (G_OBJECT (assistant), "cancel",
-                        G_CALLBACK (on_assistant_close_cancel), NULL);
+                        G_CALLBACK (on_assistant_close_cancel), &assistant);
      g_signal_connect (G_OBJECT (assistant), "close",
-                        G_CALLBACK (on_assistant_close_cancel), NULL);
+                        G_CALLBACK (on_assistant_close_cancel), &assistant);
      g_signal_connect (G_OBJECT (assistant), "apply",
                        G_CALLBACK (on_assistant_apply), NULL);
      g_signal_connect (G_OBJECT (assistant), "prepare",
@@ -201,7 +191,10 @@ do_assistant (GtkWidget *do_widget)
  if (!gtk_widget_get_visible (assistant))
    gtk_widget_show (assistant);
  else
-    gtk_window_destroy (GTK_WINDOW (assistant));
+    {
+      gtk_widget_destroy (assistant);
+      assistant = NULL;
+    }

  return assistant;
 }
--- a/demos/gtk-demo/background.glsl
+++ b/demos/gtk-demo/background.glsl
@@ -1,26 +0,0 @@
-uniform float u_time;
-
-void
-mainImage(out vec4 fragColor, in vec2 fragCoord, in vec2 resolution, in vec2 uv)
-{
-  vec2 pos = (fragCoord.xy * 2.0 - resolution.xy)/ min (resolution.x, resolution.y) ;
-
-  float t0 = sin ((u_time + 0.00)*1.0);
-  float t1 = sin ((u_time + 0.30)*0.4);
-  float t2 = cos ((u_time + 0.23)*0.9);
-  float t3 = cos ((u_time + 0.41)*0.6);
-  float t4 = cos ((u_time + 0.11)*0.3);
-
-  vec2 p0 = vec2 (t1, t0) ;
-  vec2 p1 = vec2 (t2, t3) ;
-  vec2 p2 = vec2 (t4, t3) ;
-
-  float r = 1.0/distance (pos, p0);
-  float g = 1.0/distance (pos, p1);
-  float b = 1.0/distance (pos, p2);
-  float sum = r + g + b;
-
-  float alpha = 1.0 - pow (1.0/(sum), 40.0)*pow (10.0, 40.0*0.7);
-
-  fragColor = vec4 (r*0.5, g*0.5, b*0.5, 1.0) * alpha;
-}
--- a/demos/gtk-demo/bbb.png
+++ b/demos/gtk-demo/bbb.png
--- a/demos/gtk-demo/blendmodes.ui
+++ b/demos/gtk-demo/blendmodes.ui
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
+  <requires lib="gtk+" version="3.20"/>
  <object class="GtkWindow" id="window">
    <property name="resizable">0</property>
    <property name="title">CSS Blend Modes</property>
@@ -7,10 +8,6 @@
    <property name="default-height">300</property>
    <child>
      <object class="GtkGrid">
-        <property name="margin-start">12</property>
-        <property name="margin-end">12</property>
-        <property name="margin-top">12</property>
-        <property name="margin-bottom">12</property>
        <property name="row-spacing">12</property>
        <property name="column-spacing">12</property>
        <child>
@@ -20,33 +17,34 @@
            <style>
              <class name="dim-label"/>
            </style>
-            <layout>
-              <property name="column">0</property>
-              <property name="row">0</property>
-            </layout>
          </object>
+          <packing>
+            <property name="left-attach">0</property>
+            <property name="top-attach">0</property>
+          </packing>
        </child>
        <child>
          <object class="GtkScrolledWindow" id="scrolledwindow">
+            <property name="can-focus">1</property>
            <property name="vexpand">1</property>
-            <property name="has-frame">1</property>
+            <property name="shadow-type">in</property>
            <property name="min-content-width">150</property>
-            <layout>
-              <property name="column">0</property>
-              <property name="row">1</property>
-            </layout>
          </object>
+          <packing>
+            <property name="left-attach">0</property>
+            <property name="top-attach">1</property>
+          </packing>
        </child>
        <child>
          <object class="GtkStackSwitcher">
            <property name="halign">center</property>
            <property name="hexpand">1</property>
            <property name="stack">stack</property>
-            <layout>
-              <property name="column">1</property>
-              <property name="row">0</property>
-            </layout>
          </object>
+          <packing>
+            <property name="left-attach">1</property>
+            <property name="top-attach">0</property>
+          </packing>
        </child>
        <child>
          <object class="GtkStack" id="stack">
@@ -56,284 +54,279 @@
            <property name="vhomogeneous">0</property>
            <property name="transition-type">crossfade</property>
            <child>
-              <object class="GtkStackPage">
+              <object class="GtkGrid">
+                <property name="halign">center</property>
+                <property name="valign">center</property>
+                <property name="vexpand">1</property>
+                <property name="row-spacing">12</property>
+                <property name="column-spacing">12</property>
+                <child>
+                  <object class="GtkLabel">
+                    <property name="label" translatable="yes">Duck</property>
+                  </object>
+                  <packing>
+                    <property name="left-attach">0</property>
+                    <property name="top-attach">0</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkLabel">
+                    <property name="label" translatable="yes">Background</property>
+                  </object>
+                  <packing>
+                    <property name="left-attach">1</property>
+                    <property name="top-attach">0</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkImage">
+                    <style>
+                      <class name="duck"/>
+                    </style>
+                  </object>
+                  <packing>
+                    <property name="left-attach">0</property>
+                    <property name="top-attach">1</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkImage">
+                    <style>
+                      <class name="gradient"/>
+                    </style>
+                  </object>
+                  <packing>
+                    <property name="left-attach">1</property>
+                    <property name="top-attach">1</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkLabel">
+                    <property name="label" translatable="yes">
+Blended picture</property>
+                  </object>
+                  <packing>
+                    <property name="left-attach">0</property>
+                    <property name="top-attach">2</property>
+                    <property name="width">2</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkImage">
+                    <property name="halign">center</property>
+                    <style>
+                      <class name="blend0"/>
+                    </style>
+                  </object>
+                  <packing>
+                    <property name="left-attach">0</property>
+                    <property name="top-attach">3</property>
+                    <property name="width">2</property>
+                  </packing>
+                </child>
+              </object>
+              <packing>
                <property name="name">page0</property>
                <property name="title" translatable="yes">Ducky</property>
-                <property name="child">
-                  <object class="GtkGrid">
-                    <property name="halign">center</property>
-                    <property name="valign">center</property>
-                    <property name="vexpand">1</property>
-                    <property name="row-spacing">12</property>
-                    <property name="column-spacing">12</property>
-                    <child>
-                      <object class="GtkLabel">
-                        <property name="label" translatable="yes">Duck</property>
-                        <layout>
-                          <property name="column">0</property>
-                          <property name="row">0</property>
-                        </layout>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkLabel">
-                        <property name="label" translatable="yes">Background</property>
-                        <layout>
-                          <property name="column">1</property>
-                          <property name="row">0</property>
-                        </layout>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkImage">
-                        <style>
-                          <class name="duck"/>
-                        </style>
-                        <layout>
-                          <property name="column">0</property>
-                          <property name="row">1</property>
-                        </layout>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkImage">
-                        <style>
-                          <class name="gradient"/>
-                        </style>
-                        <layout>
-                          <property name="column">1</property>
-                          <property name="row">1</property>
-                        </layout>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkLabel">
-                        <property name="label" translatable="yes">
-Blended picture</property>
-                        <layout>
-                          <property name="column">0</property>
-                          <property name="row">2</property>
-                          <property name="column-span">2</property>
-                        </layout>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkImage">
-                        <property name="halign">center</property>
-                        <style>
-                          <class name="blend0"/>
-                        </style>
-                        <layout>
-                          <property name="column">0</property>
-                          <property name="row">3</property>
-                          <property name="column-span">2</property>
-                        </layout>
-                      </object>
-                    </child>
-                  </object>
-                </property>
-              </object>
+              </packing>
            </child>
            <child>
-              <object class="GtkStackPage">
+              <object class="GtkGrid">
+                <property name="halign">center</property>
+                <property name="valign">center</property>
+                <property name="vexpand">1</property>
+                <property name="row-spacing">12</property>
+                <property name="column-spacing">12</property>
+                <child>
+                  <object class="GtkLabel">
+                    <property name="label" translatable="yes">Red</property>
+                  </object>
+                  <packing>
+                    <property name="left-attach">0</property>
+                    <property name="top-attach">0</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkLabel">
+                    <property name="label" translatable="yes">Blue</property>
+                  </object>
+                  <packing>
+                    <property name="left-attach">1</property>
+                    <property name="top-attach">0</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkImage">
+                    <style>
+                      <class name="red"/>
+                    </style>
+                  </object>
+                  <packing>
+                    <property name="left-attach">0</property>
+                    <property name="top-attach">1</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkImage">
+                    <style>
+                      <class name="blue"/>
+                    </style>
+                  </object>
+                  <packing>
+                    <property name="left-attach">1</property>
+                    <property name="top-attach">1</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkLabel">
+                    <property name="label" translatable="yes">
+Blended picture</property>
+                  </object>
+                  <packing>
+                    <property name="left-attach">0</property>
+                    <property name="top-attach">2</property>
+                    <property name="width">2</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkImage">
+                    <property name="halign">center</property>
+                    <style>
+                      <class name="blend1"/>
+                    </style>
+                  </object>
+                  <packing>
+                    <property name="left-attach">0</property>
+                    <property name="top-attach">3</property>
+                    <property name="width">2</property>
+                  </packing>
+                </child>
+              </object>
+              <packing>
                <property name="name">page1</property>
                <property name="title" translatable="yes">Blends</property>
-                <property name="child">
-                  <object class="GtkGrid">
-                    <property name="halign">center</property>
-                    <property name="valign">center</property>
-                    <property name="vexpand">1</property>
-                    <property name="row-spacing">12</property>
-                    <property name="column-spacing">12</property>
-                    <child>
-                      <object class="GtkLabel">
-                        <property name="label" translatable="yes">Red</property>
-                        <layout>
-                          <property name="column">0</property>
-                          <property name="row">0</property>
-                        </layout>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkLabel">
-                        <property name="label" translatable="yes">Blue</property>
-                        <layout>
-                          <property name="column">1</property>
-                          <property name="row">0</property>
-                        </layout>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkImage">
-                        <style>
-                          <class name="red"/>
-                        </style>
-                        <layout>
-                          <property name="column">0</property>
-                          <property name="row">1</property>
-                        </layout>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkImage">
-                        <style>
-                          <class name="blue"/>
-                        </style>
-                        <layout>
-                          <property name="column">1</property>
-                          <property name="row">1</property>
-                        </layout>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkLabel">
-                        <property name="label" translatable="yes">
-Blended picture</property>
-                        <layout>
-                          <property name="column">0</property>
-                          <property name="row">2</property>
-                          <property name="column-span">2</property>
-                        </layout>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkImage">
-                        <property name="halign">center</property>
-                        <style>
-                          <class name="blend1"/>
-                        </style>
-                        <layout>
-                          <property name="column">0</property>
-                          <property name="row">3</property>
-                          <property name="column-span">2</property>
-                        </layout>
-                      </object>
-                    </child>
-                  </object>
-                </property>
-              </object>
+              </packing>
            </child>
            <child>
-              <object class="GtkStackPage">
+              <object class="GtkGrid">
+                <property name="halign">center</property>
+                <property name="valign">center</property>
+                <property name="hexpand">1</property>
+                <property name="vexpand">1</property>
+                <property name="row-spacing">6</property>
+                <property name="column-spacing">12</property>
+                <child>
+                  <object class="GtkImage">
+                    <style>
+                      <class name="cyan"/>
+                    </style>
+                  </object>
+                  <packing>
+                    <property name="left-attach">0</property>
+                    <property name="top-attach">1</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkImage">
+                    <style>
+                      <class name="magenta"/>
+                    </style>
+                  </object>
+                  <packing>
+                    <property name="left-attach">1</property>
+                    <property name="top-attach">1</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkImage">
+                    <style>
+                      <class name="yellow"/>
+                    </style>
+                  </object>
+                  <packing>
+                    <property name="left-attach">0</property>
+                    <property name="top-attach">3</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkImage">
+                    <property name="halign">center</property>
+                    <style>
+                      <class name="blend2"/>
+                    </style>
+                  </object>
+                  <packing>
+                    <property name="left-attach">1</property>
+                    <property name="top-attach">3</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkLabel">
+                    <property name="label" translatable="yes">Cyan</property>
+                    <property name="xalign">0</property>
+                    <style>
+                      <class name="dim-label"/>
+                    </style>
+                  </object>
+                  <packing>
+                    <property name="left-attach">0</property>
+                    <property name="top-attach">0</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkLabel">
+                    <property name="label" translatable="yes">Magenta</property>
+                    <property name="xalign">0</property>
+                    <style>
+                      <class name="dim-label"/>
+                    </style>
+                  </object>
+                  <packing>
+                    <property name="left-attach">1</property>
+                    <property name="top-attach">0</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkLabel">
+                    <property name="label" translatable="yes">Yellow</property>
+                    <property name="xalign">0</property>
+                    <style>
+                      <class name="dim-label"/>
+                    </style>
+                  </object>
+                  <packing>
+                    <property name="left-attach">0</property>
+                    <property name="top-attach">2</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkLabel">
+                    <property name="label" translatable="yes">Blended picture</property>
+                    <property name="xalign">0</property>
+                    <attributes>
+                      <attribute name="weight" value="bold"/>
+                    </attributes>
+                  </object>
+                  <packing>
+                    <property name="left-attach">1</property>
+                    <property name="top-attach">2</property>
+                  </packing>
+                </child>
+              </object>
+              <packing>
                <property name="name">page2</property>
                <property name="title" translatable="yes">CMYK</property>
-                <property name="child">
-                  <object class="GtkGrid">
-                    <property name="halign">center</property>
-                    <property name="valign">center</property>
-                    <property name="hexpand">1</property>
-                    <property name="vexpand">1</property>
-                    <property name="row-spacing">6</property>
-                    <property name="column-spacing">12</property>
-                    <child>
-                      <object class="GtkImage">
-                        <style>
-                          <class name="cyan"/>
-                        </style>
-                        <layout>
-                          <property name="column">0</property>
-                          <property name="row">1</property>
-                        </layout>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkImage">
-                        <style>
-                          <class name="magenta"/>
-                        </style>
-                        <layout>
-                          <property name="column">1</property>
-                          <property name="row">1</property>
-                        </layout>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkImage">
-                        <style>
-                          <class name="yellow"/>
-                        </style>
-                        <layout>
-                          <property name="column">0</property>
-                          <property name="row">3</property>
-                        </layout>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkImage">
-                        <property name="halign">center</property>
-                        <style>
-                          <class name="blend2"/>
-                        </style>
-                        <layout>
-                          <property name="column">1</property>
-                          <property name="row">3</property>
-                        </layout>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkLabel">
-                        <property name="label" translatable="yes">Cyan</property>
-                        <property name="xalign">0</property>
-                        <style>
-                          <class name="dim-label"/>
-                        </style>
-                        <layout>
-                          <property name="column">0</property>
-                          <property name="row">0</property>
-                        </layout>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkLabel">
-                        <property name="label" translatable="yes">Magenta</property>
-                        <property name="xalign">0</property>
-                        <style>
-                          <class name="dim-label"/>
-                        </style>
-                        <layout>
-                          <property name="column">1</property>
-                          <property name="row">0</property>
-                        </layout>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkLabel">
-                        <property name="label" translatable="yes">Yellow</property>
-                        <property name="xalign">0</property>
-                        <style>
-                          <class name="dim-label"/>
-                        </style>
-                        <layout>
-                          <property name="column">0</property>
-                          <property name="row">2</property>
-                        </layout>
-                      </object>
-                    </child>
-                    <child>
-                      <object class="GtkLabel">
-                        <property name="label" translatable="yes">Blended picture</property>
-                        <property name="xalign">0</property>
-                        <attributes>
-                          <attribute name="weight" value="bold"></attribute>
-                        </attributes>
-                        <layout>
-                          <property name="column">1</property>
-                          <property name="row">2</property>
-                        </layout>
-                      </object>
-                    </child>
-                  </object>
-                </property>
-              </object>
+              </packing>
            </child>
-            <layout>
-              <property name="column">1</property>
-              <property name="row">1</property>
-            </layout>
          </object>
+          <packing>
+            <property name="left-attach">1</property>
+            <property name="top-attach">1</property>
+          </packing>
        </child>
      </object>
    </child>
-    <child type="titlebar"/>
+    <child type="titlebar">
+    </child>
  </object>
 </interface>
--- a/demos/gtk-demo/bluroverlay.c
+++ b/demos/gtk-demo/bluroverlay.c
@@ -1,461 +0,0 @@
-/*
- * bluroverlay.c
- * This file is part of gtk
- *
- * Copyright (C) 2011 - Ignacio Casal Quinteiro, Mike Krüger
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "bluroverlay.h"
-
-/*
- * This is a cut-down copy of gtkoverlay.c with a custom snapshot
- * function that support a limited form of blur-under.
- */
-typedef struct _BlurOverlayChild BlurOverlayChild;
-
-struct _BlurOverlayChild
-{
-  double blur;
-};
-
-enum {
-  GET_CHILD_POSITION,
-  LAST_SIGNAL
-};
-
-static guint signals[LAST_SIGNAL] = { 0 };
-static GQuark child_data_quark = 0;
-
-G_DEFINE_TYPE (BlurOverlay, blur_overlay, GTK_TYPE_WIDGET)
-
-static void
-blur_overlay_set_overlay_child (GtkWidget       *widget,
-                               BlurOverlayChild *child_data)
-{
-  g_object_set_qdata_full (G_OBJECT (widget), child_data_quark, child_data, g_free);
-}
-
-static BlurOverlayChild *
-blur_overlay_get_overlay_child (GtkWidget *widget)
-{
-  return (BlurOverlayChild *) g_object_get_qdata (G_OBJECT (widget), child_data_quark);
-}
-
-static void
-blur_overlay_measure (GtkWidget      *widget,
-                     GtkOrientation  orientation,
-                     int             for_size,
-                     int            *minimum,
-                     int            *natural,
-                     int            *minimum_baseline,
-                     int            *natural_baseline)
-{
-  GtkWidget *child;
-
-  for (child = gtk_widget_get_first_child (widget);
-       child != NULL;
-       child = gtk_widget_get_next_sibling (child))
-    {
-      int child_min, child_nat, child_min_baseline, child_nat_baseline;
-
-      gtk_widget_measure (child,
-                          orientation,
-                          for_size,
-                          &child_min, &child_nat,
-                          &child_min_baseline, &child_nat_baseline);
-
-      *minimum = MAX (*minimum, child_min);
-      *natural = MAX (*natural, child_nat);
-      if (child_min_baseline > -1)
-        *minimum_baseline = MAX (*minimum_baseline, child_min_baseline);
-      if (child_nat_baseline > -1)
-        *natural_baseline = MAX (*natural_baseline, child_nat_baseline);
-    }
-}
-
-static void
-blur_overlay_compute_child_allocation (BlurOverlay      *overlay,
-                                      GtkWidget       *widget,
-                                      BlurOverlayChild *child,
-                                      GtkAllocation   *widget_allocation)
-{
-  GtkAllocation allocation;
-  gboolean result;
-
-  g_signal_emit (overlay, signals[GET_CHILD_POSITION],
-                 0, widget, &allocation, &result);
-
-  widget_allocation->x = allocation.x;
-  widget_allocation->y = allocation.y;
-  widget_allocation->width = allocation.width;
-  widget_allocation->height = allocation.height;
-}
-
-static GtkAlign
-effective_align (GtkAlign         align,
-                 GtkTextDirection direction)
-{
-  switch (align)
-    {
-    case GTK_ALIGN_START:
-      return direction == GTK_TEXT_DIR_RTL ? GTK_ALIGN_END : GTK_ALIGN_START;
-    case GTK_ALIGN_END:
-      return direction == GTK_TEXT_DIR_RTL ? GTK_ALIGN_START : GTK_ALIGN_END;
-    case GTK_ALIGN_FILL:
-    case GTK_ALIGN_CENTER:
-    case GTK_ALIGN_BASELINE:
-    default:
-      return align;
-    }
-}
-
-static void
-blur_overlay_child_update_style_classes (BlurOverlay *overlay,
-                                         GtkWidget *child,
-                                         GtkAllocation *child_allocation)
-{
-  int width, height;
-  GtkAlign valign, halign;
-  gboolean is_left, is_right, is_top, is_bottom;
-  gboolean has_left, has_right, has_top, has_bottom;
-
-  has_left = gtk_widget_has_css_class (child, "left");
-  has_right = gtk_widget_has_css_class (child, "right");
-  has_top = gtk_widget_has_css_class (child, "top");
-  has_bottom = gtk_widget_has_css_class (child, "bottom");
-
-  is_left = is_right = is_top = is_bottom = FALSE;
-
-  width = gtk_widget_get_width (GTK_WIDGET (overlay));
-  height = gtk_widget_get_height (GTK_WIDGET (overlay));
-
-  halign = effective_align (gtk_widget_get_halign (child),
-                            gtk_widget_get_direction (child));
-
-  if (halign == GTK_ALIGN_START)
-    is_left = (child_allocation->x == 0);
-  else if (halign == GTK_ALIGN_END)
-    is_right = (child_allocation->x + child_allocation->width == width);
-
-  valign = gtk_widget_get_valign (child);
-
-  if (valign == GTK_ALIGN_START)
-    is_top = (child_allocation->y == 0);
-  else if (valign == GTK_ALIGN_END)
-    is_bottom = (child_allocation->y + child_allocation->height == height);
-
-  if (has_left && !is_left)
-    gtk_widget_remove_css_class (child, "left");
-  else if (!has_left && is_left)
-    gtk_widget_add_css_class (child, "left");
-
-  if (has_right && !is_right)
-    gtk_widget_remove_css_class (child, "right");
-  else if (!has_right && is_right)
-    gtk_widget_add_css_class (child, "right");
-
-  if (has_top && !is_top)
-    gtk_widget_remove_css_class (child, "top");
-  else if (!has_top && is_top)
-    gtk_widget_add_css_class (child, "top");
-
-  if (has_bottom && !is_bottom)
-    gtk_widget_remove_css_class (child, "bottom");
-  else if (!has_bottom && is_bottom)
-    gtk_widget_add_css_class (child, "bottom");
-}
-
-static void
-blur_overlay_child_allocate (BlurOverlay      *overlay,
-                            GtkWidget       *widget,
-                            BlurOverlayChild *child)
-{
-  GtkAllocation child_allocation;
-
-  if (!gtk_widget_get_visible (widget))
-    return;
-
-  blur_overlay_compute_child_allocation (overlay, widget, child, &child_allocation);
-
-  blur_overlay_child_update_style_classes (overlay, widget, &child_allocation);
-  gtk_widget_size_allocate (widget, &child_allocation, -1);
-}
-
-static void
-blur_overlay_size_allocate (GtkWidget *widget,
-                           int        width,
-                           int        height,
-                           int        baseline)
-{
-  BlurOverlay *overlay = BLUR_OVERLAY (widget);
-  GtkWidget *child;
-  GtkWidget *main_widget;
-
-  main_widget = overlay->main_widget;
-  if (main_widget && gtk_widget_get_visible (main_widget))
-    gtk_widget_size_allocate (main_widget,
-                              &(GtkAllocation) {
-                                0, 0,
-                                width, height
-                              }, -1);
-
-  for (child = gtk_widget_get_first_child (widget);
-       child != NULL;
-       child = gtk_widget_get_next_sibling (child))
-    {
-      if (child != main_widget)
-        {
-          BlurOverlayChild *child_data = blur_overlay_get_overlay_child (child);
-          blur_overlay_child_allocate (overlay, child, child_data);
-        }
-    }
-}
-
-static gboolean
-blur_overlay_get_child_position (BlurOverlay    *overlay,
-                                 GtkWidget      *widget,
-                                 GtkAllocation  *alloc)
-{
-  GtkRequisition min, req;
-  GtkAlign halign;
-  GtkTextDirection direction;
-  int width, height;
-
-  gtk_widget_get_preferred_size (widget, &min, &req);
-  width = gtk_widget_get_width (GTK_WIDGET (overlay));
-  height = gtk_widget_get_height (GTK_WIDGET (overlay));
-
-  alloc->x = 0;
-  alloc->width = MAX (min.width, MIN (width, req.width));
-
-  direction = gtk_widget_get_direction (widget);
-
-  halign = gtk_widget_get_halign (widget);
-  switch (effective_align (halign, direction))
-    {
-    case GTK_ALIGN_START:
-      /* nothing to do */
-      break;
-    case GTK_ALIGN_FILL:
-      alloc->width = MAX (alloc->width, width);
-      break;
-    case GTK_ALIGN_CENTER:
-      alloc->x += width / 2 - alloc->width / 2;
-      break;
-    case GTK_ALIGN_END:
-      alloc->x += width - alloc->width;
-      break;
-    case GTK_ALIGN_BASELINE:
-    default:
-      g_assert_not_reached ();
-      break;
-    }
-
-  alloc->y = 0;
-  alloc->height = MAX  (min.height, MIN (height, req.height));
-
-  switch (gtk_widget_get_valign (widget))
-    {
-    case GTK_ALIGN_START:
-      /* nothing to do */
-      break;
-    case GTK_ALIGN_FILL:
-      alloc->height = MAX (alloc->height, height);
-      break;
-    case GTK_ALIGN_CENTER:
-      alloc->y += height / 2 - alloc->height / 2;
-      break;
-    case GTK_ALIGN_END:
-      alloc->y += height - alloc->height;
-      break;
-    case GTK_ALIGN_BASELINE:
-    default:
-      g_assert_not_reached ();
-      break;
-    }
-
-  return TRUE;
-}
-
-static void
-blur_overlay_snapshot (GtkWidget   *widget,
-                      GtkSnapshot *snapshot)
-{
-  GtkWidget *main_widget;
-  GskRenderNode *main_widget_node = NULL;
-  GtkWidget *child;
-  GtkAllocation main_alloc;
-  cairo_region_t *clip = NULL;
-  int i;
-
-  main_widget = BLUR_OVERLAY (widget)->main_widget;
-  gtk_widget_get_allocation (widget, &main_alloc);
-
-  for (child = gtk_widget_get_first_child (widget);
-       child != NULL;
-       child = gtk_widget_get_next_sibling (child))
-    {
-      BlurOverlayChild *child_info = blur_overlay_get_overlay_child (child);
-      double blur = 0;
-      if (child_info)
-        blur = child_info->blur;
-
-      if (blur > 0)
-        {
-          GtkAllocation alloc;
-          graphene_rect_t bounds;
-
-          if (main_widget_node == NULL)
-            {
-              GtkSnapshot *child_snapshot;
-
-              child_snapshot = gtk_snapshot_new ();
-              gtk_widget_snapshot_child (widget, main_widget, child_snapshot);
-              main_widget_node = gtk_snapshot_free_to_node (child_snapshot);
-            }
-
-          gtk_widget_get_allocation (child, &alloc);
-          graphene_rect_init (&bounds, alloc.x, alloc.y, alloc.width, alloc.height);
-          gtk_snapshot_push_blur (snapshot, blur);
-          gtk_snapshot_push_clip (snapshot, &bounds);
-          gtk_snapshot_append_node (snapshot, main_widget_node);
-          gtk_snapshot_pop (snapshot);
-          gtk_snapshot_pop (snapshot);
-
-          if (clip == NULL)
-            {
-              cairo_rectangle_int_t rect;
-              rect.x = rect.y = 0;
-              rect.width = main_alloc.width;
-              rect.height = main_alloc.height;
-              clip = cairo_region_create_rectangle (&rect);
-            }
-          cairo_region_subtract_rectangle (clip, (cairo_rectangle_int_t *)&alloc);
-        }
-    }
-
-  if (clip == NULL)
-    {
-      for (child = gtk_widget_get_first_child (widget);
-           child != NULL;
-           child = gtk_widget_get_next_sibling (child))
-        {
-          gtk_widget_snapshot_child (widget, child, snapshot);
-        }
-      return;
-    }
-
-  for (i = 0; i < cairo_region_num_rectangles (clip); i++)
-    {
-      cairo_rectangle_int_t rect;
-      graphene_rect_t bounds;
-
-      cairo_region_get_rectangle (clip, i, &rect);
-      graphene_rect_init (&bounds, rect.x, rect.y, rect.width, rect.height);
-      gtk_snapshot_push_clip (snapshot, &bounds);
-      gtk_snapshot_append_node (snapshot, main_widget_node);
-      gtk_snapshot_pop (snapshot);
-    }
-
-  cairo_region_destroy (clip);
-
-  for (child = gtk_widget_get_first_child (widget);
-       child != NULL;
-       child = gtk_widget_get_next_sibling (child))
-    {
-      if (child != main_widget)
-        gtk_widget_snapshot_child (widget, child, snapshot);
-    }
-
-  gsk_render_node_unref (main_widget_node);
-}
-
-static void
-blur_overlay_dispose (GObject *object)
-{
-  BlurOverlay *overlay = BLUR_OVERLAY (object);
-  GtkWidget *child;
-
-  g_clear_pointer (&overlay->main_widget, gtk_widget_unparent);
-
-  while ((child = gtk_widget_get_first_child (GTK_WIDGET (overlay))))
-    gtk_widget_unparent (child);
-
-  G_OBJECT_CLASS (blur_overlay_parent_class)->dispose (object);
-}
-
-static void
-blur_overlay_class_init (BlurOverlayClass *klass)
-{
-  GObjectClass *object_class = G_OBJECT_CLASS (klass);
-  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
-
-  object_class->dispose = blur_overlay_dispose;
-
-  widget_class->measure = blur_overlay_measure;
-  widget_class->size_allocate = blur_overlay_size_allocate;
-  widget_class->snapshot = blur_overlay_snapshot;
-
-  klass->get_child_position = blur_overlay_get_child_position;
-
-  signals[GET_CHILD_POSITION] =
-    g_signal_new ("get-child-position",
-                  G_TYPE_FROM_CLASS (object_class),
-                  G_SIGNAL_RUN_LAST,
-                  G_STRUCT_OFFSET (BlurOverlayClass, get_child_position),
-                  g_signal_accumulator_true_handled, NULL,
-                  NULL,
-                  G_TYPE_BOOLEAN, 2,
-                  GTK_TYPE_WIDGET,
-                  GDK_TYPE_RECTANGLE | G_SIGNAL_TYPE_STATIC_SCOPE);
-
-  child_data_quark = g_quark_from_static_string ("gtk-overlay-child-data");
-
-  gtk_widget_class_set_css_name (widget_class, "overlay");
-}
-
-static void
-blur_overlay_init (BlurOverlay *overlay)
-{
-}
-
-GtkWidget *
-blur_overlay_new (void)
-{
-  return g_object_new (BLUR_TYPE_OVERLAY, NULL);
-}
-
-void
-blur_overlay_add_overlay (BlurOverlay *overlay,
-                          GtkWidget   *widget,
-                          double       blur)
-{
-  BlurOverlayChild *child = g_new0 (BlurOverlayChild, 1);
-
-  gtk_widget_insert_before (widget, GTK_WIDGET (overlay), NULL);
-
-  child->blur = blur;
-
-  blur_overlay_set_overlay_child (widget, child);
-}
-
-void
-blur_overlay_set_child (BlurOverlay *overlay,
-                        GtkWidget   *widget)
-{
-  gtk_widget_insert_after (widget, GTK_WIDGET (overlay), NULL);
-  overlay->main_widget = widget;
-}
--- a/demos/gtk-demo/bluroverlay.h
+++ b/demos/gtk-demo/bluroverlay.h
@@ -1,68 +0,0 @@
-/*
- * bluroverlay.h
- * This file is part of gtk
- *
- * Copyright (C) 2011 - Ignacio Casal Quinteiro, Mike Krüger
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef __BLUR_OVERLAY_H__
-#define __BLUR_OVERLAY_H__
-
-#include <gtk/gtk.h>
-
-G_BEGIN_DECLS
-
-#define BLUR_TYPE_OVERLAY             (blur_overlay_get_type ())
-#define BLUR_OVERLAY(obj)             (G_TYPE_CHECK_INSTANCE_CAST ((obj), BLUR_TYPE_OVERLAY, BlurOverlay))
-#define BLUR_OVERLAY_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST ((klass), BLUR_TYPE_OVERLAY, BlurOverlayClass))
-#define BLUR_IS_OVERLAY(obj)          (G_TYPE_CHECK_INSTANCE_TYPE ((obj), BLUR_TYPE_OVERLAY))
-#define BLUR_IS_OVERLAY_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE ((klass), BLUR_TYPE_OVERLAY))
-#define BLUR_OVERLAY_GET_CLASS(obj)   (G_TYPE_INSTANCE_GET_CLASS ((obj), BLUR_TYPE_OVERLAY, BlurOverlayClass))
-
-typedef struct _BlurOverlay         BlurOverlay;
-typedef struct _BlurOverlayClass    BlurOverlayClass;
-
-struct _BlurOverlay
-{
-  GtkWidget parent_instance;
-
-  GtkWidget *main_widget;
-};
-
-struct _BlurOverlayClass
-{
-  GtkWidgetClass parent_class;
-
-  gboolean (*get_child_position) (BlurOverlay   *overlay,
-                                  GtkWidget     *widget,
-                                  GtkAllocation *allocation);
-};
-
-GDK_AVAILABLE_IN_ALL
-GType      blur_overlay_get_type    (void) G_GNUC_CONST;
-GDK_AVAILABLE_IN_ALL
-GtkWidget *blur_overlay_new         (void);
-GDK_AVAILABLE_IN_ALL
-void       blur_overlay_add_overlay (BlurOverlay *overlay,
-                                     GtkWidget   *widget,
-                                     double       blur);
-GDK_AVAILABLE_IN_ALL
-void       blur_overlay_set_child   (BlurOverlay *overlay,
-                                     GtkWidget   *widget);
-
-G_END_DECLS
-
-#endif /* __BLUR_OVERLAY_H__ */
--- a/demos/gtk-demo/builder.c
+++ b/demos/gtk-demo/builder.c
@@ -1,8 +1,6 @@
 /* Builder
- * #Keywords: GMenu, GtkPopoverMenuBar, GtkBuilder, GtkStatusBar, GtkShortcutController, toolbar
 *
- * Demonstrates a traditional interface, loaded from a XML description,
- * and shows how to connect actions to the menu items and toolbar buttons.
+ * Demonstrates an interface loaded from a XML description.
 */

 #include <gtk/gtk.h>
@@ -14,7 +12,7 @@ quit_activate (GSimpleAction *action,
 {
  GtkWidget *window = user_data;

-  gtk_window_destroy (GTK_WINDOW (window));
+  gtk_widget_destroy (window);
 }

 static void
@@ -23,38 +21,13 @@ about_activate (GSimpleAction *action,
                gpointer       user_data)
 {
  GtkWidget *window = user_data;
+  GtkBuilder *builder;
  GtkWidget *about_dlg;

-  about_dlg = GTK_WIDGET (g_object_get_data (G_OBJECT (window), "about"));
-  gtk_window_present (GTK_WINDOW (about_dlg));
-}
-
-static void
-remove_timeout (gpointer data)
-{
-  guint id = GPOINTER_TO_UINT (data);
-
-  g_source_remove (id);
-}
-
-static gboolean
-pop_status (gpointer data)
-{
-  gtk_statusbar_pop (GTK_STATUSBAR (data), 0);
-  g_object_set_data (G_OBJECT (data), "timeout", NULL);
-  return G_SOURCE_REMOVE;
-}
-
-static void
-status_message (GtkStatusbar *status,
-                const char   *text)
-{
-  guint id;
-
-  gtk_statusbar_push (GTK_STATUSBAR (status), 0, text);
-  id = g_timeout_add (5000, pop_status, status);
-
-  g_object_set_data_full (G_OBJECT (status), "timeout", GUINT_TO_POINTER (id), remove_timeout);
+  builder = g_object_get_data (G_OBJECT (window), "builder");
+  about_dlg = GTK_WIDGET (gtk_builder_get_object (builder, "aboutdialog1"));
+  gtk_dialog_run (GTK_DIALOG (about_dlg));
+  gtk_widget_hide (about_dlg);
 }

 static void
@@ -62,34 +35,10 @@ help_activate (GSimpleAction *action,
               GVariant      *parameter,
               gpointer       user_data)
 {
-  GtkWidget *status;
-
-  status = GTK_WIDGET (g_object_get_data (G_OBJECT (user_data), "status"));
-  status_message (GTK_STATUSBAR (status), "Help not available");
-}
-
-static void
-not_implemented (GSimpleAction *action,
-                 GVariant      *parameter,
-                 gpointer       user_data)
-{
-  GtkWidget *status;
-  char *text;
-
-  text = g_strdup_printf ("Action “%s” not implemented", g_action_get_name (G_ACTION (action)));
-  status = GTK_WIDGET (g_object_get_data (G_OBJECT (user_data), "status"));
-  status_message (GTK_STATUSBAR (status), text);
-  g_free (text);
+  g_print ("Help not available\n");
 }

 static GActionEntry win_entries[] = {
-  { "new", not_implemented, NULL, NULL, NULL },
-  { "open", not_implemented, NULL, NULL, NULL },
-  { "save", not_implemented, NULL, NULL, NULL },
-  { "save-as", not_implemented, NULL, NULL, NULL },
-  { "copy", not_implemented, NULL, NULL, NULL },
-  { "cut", not_implemented, NULL, NULL, NULL },
-  { "paste", not_implemented, NULL, NULL, NULL },
  { "quit", quit_activate, NULL, NULL, NULL },
  { "about", about_activate, NULL, NULL, NULL },
  { "help", help_activate, NULL, NULL, NULL }
@@ -99,78 +48,77 @@ GtkWidget *
 do_builder (GtkWidget *do_widget)
 {
  static GtkWidget *window = NULL;
+  GtkWidget *toolbar;
  GActionGroup *actions;
+  GtkAccelGroup *accel_group;
+  GtkWidget *item;

  if (!window)
    {
      GtkBuilder *builder;
-      GtkWidget *about;
-      GtkWidget *status;
-      GtkEventController *controller;

      builder = gtk_builder_new_from_resource ("/builder/demo.ui");

+      gtk_builder_connect_signals (builder, NULL);
      window = GTK_WIDGET (gtk_builder_get_object (builder, "window1"));
      gtk_window_set_display (GTK_WINDOW (window),
                              gtk_widget_get_display (do_widget));
-      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
+      g_signal_connect (window, "destroy",
+                        G_CALLBACK (gtk_widget_destroyed), &window);
+      toolbar = GTK_WIDGET (gtk_builder_get_object (builder, "toolbar1"));
+      gtk_style_context_add_class (gtk_widget_get_style_context (toolbar),
+                                   "primary-toolbar");
      actions = (GActionGroup*)g_simple_action_group_new ();
      g_action_map_add_action_entries (G_ACTION_MAP (actions),
                                       win_entries, G_N_ELEMENTS (win_entries),
                                       window);
      gtk_widget_insert_action_group (window, "win", actions);
+      accel_group = gtk_accel_group_new ();
+      gtk_window_add_accel_group (GTK_WINDOW (window), accel_group);

-      controller = gtk_shortcut_controller_new ();
-      gtk_shortcut_controller_set_scope (GTK_SHORTCUT_CONTROLLER (controller),
-                                         GTK_SHORTCUT_SCOPE_GLOBAL);
-      gtk_widget_add_controller (window, controller);
-      gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (controller),
-           gtk_shortcut_new (gtk_keyval_trigger_new (GDK_KEY_n, GDK_CONTROL_MASK),
-                             gtk_named_action_new ("win.new")));
-      gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (controller),
-           gtk_shortcut_new (gtk_keyval_trigger_new (GDK_KEY_o, GDK_CONTROL_MASK),
-                             gtk_named_action_new ("win.open")));
-      gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (controller),
-           gtk_shortcut_new (gtk_keyval_trigger_new (GDK_KEY_s, GDK_CONTROL_MASK),
-                             gtk_named_action_new ("win.save")));
-      gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (controller),
-           gtk_shortcut_new (gtk_keyval_trigger_new (GDK_KEY_s, GDK_CONTROL_MASK|GDK_SHIFT_MASK),
-                             gtk_named_action_new ("win.save-as")));
-      gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (controller),
-           gtk_shortcut_new (gtk_keyval_trigger_new (GDK_KEY_q, GDK_CONTROL_MASK),
-                             gtk_named_action_new ("win.quit")));
-      gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (controller),
-           gtk_shortcut_new (gtk_keyval_trigger_new (GDK_KEY_c, GDK_CONTROL_MASK),
-                             gtk_named_action_new ("win.copy")));
-      gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (controller),
-           gtk_shortcut_new (gtk_keyval_trigger_new (GDK_KEY_x, GDK_CONTROL_MASK),
-                             gtk_named_action_new ("win.cut")));
-      gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (controller),
-           gtk_shortcut_new (gtk_keyval_trigger_new (GDK_KEY_v, GDK_CONTROL_MASK),
-                             gtk_named_action_new ("win.paste")));
-      gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (controller),
-           gtk_shortcut_new (gtk_keyval_trigger_new (GDK_KEY_F1, 0),
-                             gtk_named_action_new ("win.help")));
-      gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (controller),
-           gtk_shortcut_new (gtk_keyval_trigger_new (GDK_KEY_F7, 0),
-                             gtk_named_action_new ("win.about")));
+      item = (GtkWidget*)gtk_builder_get_object (builder, "new_item");
+      gtk_widget_add_accelerator (item, "activate", accel_group,
+                                  GDK_KEY_n, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE);

-      about = GTK_WIDGET (gtk_builder_get_object (builder, "aboutdialog1"));
-      gtk_window_set_transient_for (GTK_WINDOW (about), GTK_WINDOW (window));
-      gtk_window_set_hide_on_close (GTK_WINDOW (about), TRUE);
-      g_object_set_data_full (G_OBJECT (window), "about",
-                              about, (GDestroyNotify)gtk_window_destroy);
+      item = (GtkWidget*)gtk_builder_get_object (builder, "open_item");
+      gtk_widget_add_accelerator (item, "activate", accel_group,
+                                  GDK_KEY_o, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE);

-      status = GTK_WIDGET (gtk_builder_get_object (builder, "statusbar1"));
-      g_object_set_data (G_OBJECT (window), "status", status);
+      item = (GtkWidget*)gtk_builder_get_object (builder, "save_item");
+      gtk_widget_add_accelerator (item, "activate", accel_group,
+                                  GDK_KEY_s, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE);

-      g_object_unref (builder);
+      item = (GtkWidget*)gtk_builder_get_object (builder, "quit_item");
+      gtk_widget_add_accelerator (item, "activate", accel_group,
+                                  GDK_KEY_q, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE);
+
+      item = (GtkWidget*)gtk_builder_get_object (builder, "copy_item");
+      gtk_widget_add_accelerator (item, "activate", accel_group,
+                                  GDK_KEY_c, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE);
+
+      item = (GtkWidget*)gtk_builder_get_object (builder, "cut_item");
+      gtk_widget_add_accelerator (item, "activate", accel_group,
+                                  GDK_KEY_x, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE);
+
+      item = (GtkWidget*)gtk_builder_get_object (builder, "paste_item");
+      gtk_widget_add_accelerator (item, "activate", accel_group,
+                                  GDK_KEY_v, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE);
+
+      item = (GtkWidget*)gtk_builder_get_object (builder, "help_item");
+      gtk_widget_add_accelerator (item, "activate", accel_group,
+                                  GDK_KEY_F1, 0, GTK_ACCEL_VISIBLE);
+
+      item = (GtkWidget*)gtk_builder_get_object (builder, "about_item");
+      gtk_widget_add_accelerator (item, "activate", accel_group,
+                                  GDK_KEY_F7, 0, GTK_ACCEL_VISIBLE);
+
+      g_object_set_data_full (G_OBJECT(window), "builder", builder, g_object_unref);
    }

  if (!gtk_widget_get_visible (window))
    gtk_widget_show (window);
  else
-    gtk_window_destroy (GTK_WINDOW (window));
+    gtk_widget_destroy (window);

  return window;
 }
--- a/demos/gtk-demo/button_box.c
+++ b/demos/gtk-demo/button_box.c
@@ -0,0 +1,127 @@
+/* Button Boxes
+ *
+ * The Button Box widgets are used to arrange buttons with padding.
+ */
+
+#include <glib/gi18n.h>
+#include <gtk/gtk.h>
+
+static GtkWidget *
+create_bbox (gint  horizontal,
+             char *title,
+             gint  spacing,
+             gint  layout)
+{
+  GtkWidget *frame;
+  GtkWidget *bbox;
+  GtkWidget *button;
+
+  frame = gtk_frame_new (title);
+
+  if (horizontal)
+    bbox = gtk_button_box_new (GTK_ORIENTATION_HORIZONTAL);
+  else
+    bbox = gtk_button_box_new (GTK_ORIENTATION_VERTICAL);
+
+  g_object_set (bbox, "margin", 5, NULL);
+
+  gtk_container_add (GTK_CONTAINER (frame), bbox);
+
+  gtk_button_box_set_layout (GTK_BUTTON_BOX (bbox), layout);
+  gtk_box_set_spacing (GTK_BOX (bbox), spacing);
+
+  button = gtk_button_new_with_label (_("OK"));
+  gtk_container_add (GTK_CONTAINER (bbox), button);
+
+  button = gtk_button_new_with_label (_("Cancel"));
+  gtk_container_add (GTK_CONTAINER (bbox), button);
+
+  button = gtk_button_new_with_label (_("Help"));
+  gtk_container_add (GTK_CONTAINER (bbox), button);
+
+  return frame;
+}
+
+GtkWidget *
+do_button_box (GtkWidget *do_widget)
+{
+  static GtkWidget *window = NULL;
+  GtkWidget *main_vbox;
+  GtkWidget *vbox;
+  GtkWidget *hbox;
+  GtkWidget *frame_horz;
+  GtkWidget *frame_vert;
+
+  if (!window)
+  {
+    window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+    gtk_window_set_display (GTK_WINDOW (window),
+                            gtk_widget_get_display (do_widget));
+    gtk_window_set_title (GTK_WINDOW (window), "Button Boxes");
+
+    g_signal_connect (window, "destroy",
+                      G_CALLBACK (gtk_widget_destroyed),
+                      &window);
+
+    main_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+    g_object_set (main_vbox, "margin", 10, NULL);
+    gtk_container_add (GTK_CONTAINER (window), main_vbox);
+
+    frame_horz = gtk_frame_new ("Horizontal Button Boxes");
+    gtk_widget_set_margin_top (frame_horz, 10);
+    gtk_widget_set_margin_bottom (frame_horz, 10);
+    gtk_box_pack_start (GTK_BOX (main_vbox), frame_horz);
+
+    vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 10);
+    g_object_set (vbox, "margin", 10, NULL);
+    gtk_container_add (GTK_CONTAINER (frame_horz), vbox);
+
+    gtk_box_pack_start (GTK_BOX (vbox),
+                        create_bbox (TRUE, "Spread", 40, GTK_BUTTONBOX_SPREAD));
+
+    gtk_box_pack_start (GTK_BOX (vbox),
+                        create_bbox (TRUE, "Edge", 40, GTK_BUTTONBOX_EDGE));
+
+    gtk_box_pack_start (GTK_BOX (vbox),
+                        create_bbox (TRUE, "Start", 40, GTK_BUTTONBOX_START));
+
+    gtk_box_pack_start (GTK_BOX (vbox),
+                        create_bbox (TRUE, "End", 40, GTK_BUTTONBOX_END));
+
+    gtk_box_pack_start (GTK_BOX (vbox),
+                        create_bbox (TRUE, "Center", 40, GTK_BUTTONBOX_CENTER));
+
+    gtk_box_pack_start (GTK_BOX (vbox),
+                        create_bbox (TRUE, "Expand", 0, GTK_BUTTONBOX_EXPAND));
+
+    frame_vert = gtk_frame_new ("Vertical Button Boxes");
+    gtk_box_pack_start (GTK_BOX (main_vbox), frame_vert);
+
+    hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 10);
+    g_object_set (hbox, "margin", 10, NULL);
+    gtk_container_add (GTK_CONTAINER (frame_vert), hbox);
+
+    gtk_box_pack_start (GTK_BOX (hbox),
+                        create_bbox (FALSE, "Spread", 10, GTK_BUTTONBOX_SPREAD));
+
+    gtk_box_pack_start (GTK_BOX (hbox),
+                        create_bbox (FALSE, "Edge", 10, GTK_BUTTONBOX_EDGE));
+
+    gtk_box_pack_start (GTK_BOX (hbox),
+                        create_bbox (FALSE, "Start", 10, GTK_BUTTONBOX_START));
+
+    gtk_box_pack_start (GTK_BOX (hbox),
+                        create_bbox (FALSE, "End", 10, GTK_BUTTONBOX_END));
+    gtk_box_pack_start (GTK_BOX (hbox),
+                        create_bbox (FALSE, "Center", 10, GTK_BUTTONBOX_CENTER));
+    gtk_box_pack_start (GTK_BOX (hbox),
+                        create_bbox (FALSE, "Expand", 0, GTK_BUTTONBOX_EXPAND));
+  }
+
+  if (!gtk_widget_get_visible (window))
+    gtk_widget_show (window);
+  else
+    gtk_widget_destroy (window);
+
+  return window;
+}
--- a/demos/gtk-demo/changedisplay.c
+++ b/demos/gtk-demo/changedisplay.c
@@ -0,0 +1,560 @@
+/* Change Display
+ *
+ * Demonstrates migrating a window between different displays.
+ * A display is a mouse and keyboard with some number of
+ * associated monitors. The neat thing about having multiple
+ * displays is that they can be on a completely separate
+ * computers, as long as there is a network connection to the
+ * computer where the application is running.
+ *
+ * Only some of the windowing systems where GTK+ runs have the
+ * concept of multiple displays. (The X Window System is the
+ * main example.) Other windowing systems can only handle one
+ * keyboard and mouse, and combine all monitors into
+ * a single display.
+ *
+ * This is a moderately complex example, and demonstrates:
+ *
+ *  - Tracking the currently open displays
+ *
+ *  - Changing the display for a window
+ *
+ *  - Letting the user choose a window by clicking on it
+ *
+ *  - Using GtkListStore and GtkTreeView
+ *
+ *  - Using GtkDialog
+ */
+#include <string.h>
+#include <glib/gi18n.h>
+#include <gtk/gtk.h>
+
+/* The ChangeDisplayInfo structure corresponds to a toplevel window and
+ * holds pointers to widgets inside the toplevel window along with other
+ * information about the contents of the window.
+ * This is a common organizational structure in real applications.
+ */
+typedef struct _ChangeDisplayInfo ChangeDisplayInfo;
+
+struct _ChangeDisplayInfo
+{
+  GtkWidget *window;
+  GtkSizeGroup *size_group;
+
+  GtkTreeModel *display_model;
+
+  GdkDisplay *current_display;
+};
+
+/* These enumerations provide symbolic names for the columns
+ * in the two GtkListStore models.
+ */
+enum
+{
+  DISPLAY_COLUMN_NAME,
+  DISPLAY_COLUMN_DISPLAY,
+  DISPLAY_NUM_COLUMNS
+};
+
+enum
+{
+  SCREEN_COLUMN_NUMBER,
+  SCREEN_COLUMN_SCREEN,
+  SCREEN_NUM_COLUMNS
+};
+
+/* Finds the toplevel window under the mouse pointer, if any.
+ */
+static GtkWidget *
+find_toplevel_at_pointer (GdkDisplay *display)
+{
+  GdkSurface *pointer_window;
+  GtkWidget *widget = NULL;
+
+  pointer_window = gdk_device_get_surface_at_position (gtk_get_current_event_device (),
+                                                      NULL, NULL);
+
+  /* The user data field of a GdkSurface is used to store a pointer
+   * to the widget that created it.
+   */
+  if (pointer_window)
+    {
+      gpointer widget_ptr;
+      gdk_surface_get_user_data (pointer_window, &widget_ptr);
+      widget = widget_ptr;
+    }
+
+  return widget ? gtk_widget_get_toplevel (widget) : NULL;
+}
+
+static void
+released_cb (GtkGestureMultiPress *gesture,
+             guint                 n_press,
+             gdouble               x,
+             gdouble               y,
+             gboolean             *clicked)
+{
+  *clicked = TRUE;
+}
+
+/* Asks the user to click on a window, then waits for them click
+ * the mouse. When the mouse is released, returns the toplevel
+ * window under the pointer, or NULL, if there is none.
+ */
+static GtkWidget *
+query_for_toplevel (GdkDisplay *display,
+                    const char *prompt)
+{
+  GtkWidget *popup, *label, *frame;
+  GdkCursor *cursor;
+  GtkWidget *toplevel = NULL;
+  GdkDevice *device;
+
+  popup = gtk_window_new (GTK_WINDOW_POPUP);
+  gtk_window_set_display (GTK_WINDOW (popup), display);
+  gtk_window_set_modal (GTK_WINDOW (popup), TRUE);
+  gtk_window_set_position (GTK_WINDOW (popup), GTK_WIN_POS_CENTER);
+
+  frame = gtk_frame_new (NULL);
+  gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_OUT);
+  gtk_container_add (GTK_CONTAINER (popup), frame);
+
+  label = gtk_label_new (prompt);
+  g_object_set (label, "margin", 10, NULL);
+  gtk_container_add (GTK_CONTAINER (frame), label);
+
+  gtk_widget_show (popup);
+  cursor = gdk_cursor_new_from_name ("crosshair", NULL);
+  device = gtk_get_current_event_device ();
+
+  if (gdk_seat_grab (gdk_device_get_seat (device),
+                     gtk_widget_get_surface (popup),
+                     GDK_SEAT_CAPABILITY_ALL_POINTING,
+                     FALSE, cursor, NULL, NULL, NULL) == GDK_GRAB_SUCCESS)
+    {
+      GtkGesture *gesture = gtk_gesture_multi_press_new ();
+      gboolean clicked = FALSE;
+
+      g_signal_connect (gesture, "released",
+                        G_CALLBACK (released_cb), &clicked);
+      gtk_widget_add_controller (popup, GTK_EVENT_CONTROLLER (gesture));
+
+      /* Process events until clicked is set by our button release event handler.
+       * We pass in may_block=TRUE since we want to wait if there
+       * are no events currently.
+       */
+      while (!clicked)
+        g_main_context_iteration (NULL, TRUE);
+
+      gdk_seat_ungrab (gdk_device_get_seat (device));
+
+      toplevel = find_toplevel_at_pointer (display);
+      if (toplevel == popup)
+        toplevel = NULL;
+    }
+
+  g_object_unref (cursor);
+  gtk_widget_destroy (popup);
+
+  return toplevel;
+}
+
+/* Prompts the user for a toplevel window to move, and then moves
+ * that window to the currently selected display
+ */
+static void
+query_change_display (ChangeDisplayInfo *info)
+{
+  GdkDisplay *display = gtk_widget_get_display (info->window);
+  GtkWidget *toplevel;
+
+  toplevel = query_for_toplevel (display,
+                                 "Please select the toplevel\n"
+                                 "to move to the new display");
+
+  if (toplevel)
+    gtk_window_set_display (GTK_WINDOW (toplevel), info->current_display);
+  else
+    gdk_display_beep (display);
+}
+
+/* Called when the user clicks on a button in our dialog or
+ * closes the dialog through the window manager. Unless the
+ * "Change" button was clicked, we destroy the dialog.
+ */
+static void
+response_cb (GtkDialog         *dialog,
+             gint               response_id,
+             ChangeDisplayInfo *info)
+{
+  if (response_id == GTK_RESPONSE_OK)
+    query_change_display (info);
+  else
+    gtk_widget_destroy (GTK_WIDGET (dialog));
+}
+
+/* Called when the user clicks on "Open..." in the display
+ * frame. Prompts for a new display, and then opens a connection
+ * to that display.
+ */
+static void
+open_display_cb (GtkWidget         *button,
+                 ChangeDisplayInfo *info)
+{
+  GtkWidget *content_area;
+  GtkWidget *dialog;
+  GtkWidget *display_entry;
+  GtkWidget *dialog_label;
+  gchar *new_screen_name = NULL;
+  GdkDisplay *result = NULL;
+
+  dialog = gtk_dialog_new_with_buttons ("Open Display",
+                                        GTK_WINDOW (info->window),
+                                        GTK_DIALOG_MODAL,
+                                        _("_Cancel"), GTK_RESPONSE_CANCEL,
+                                        _("_OK"), GTK_RESPONSE_OK,
+                                        NULL);
+
+  gtk_dialog_set_default_response (GTK_DIALOG (dialog), GTK_RESPONSE_OK);
+  display_entry = gtk_entry_new ();
+  gtk_entry_set_activates_default (GTK_ENTRY (display_entry), TRUE);
+  dialog_label =
+    gtk_label_new ("Please enter the name of\nthe new display\n");
+
+  content_area = gtk_dialog_get_content_area (GTK_DIALOG (dialog));
+
+  gtk_container_add (GTK_CONTAINER (content_area), dialog_label);
+  gtk_container_add (GTK_CONTAINER (content_area), display_entry);
+
+  gtk_widget_grab_focus (display_entry);
+
+  while (!result)
+    {
+      gint response_id = gtk_dialog_run (GTK_DIALOG (dialog));
+      if (response_id != GTK_RESPONSE_OK)
+        break;
+
+      new_screen_name = gtk_editable_get_chars (GTK_EDITABLE (display_entry),
+                                                0, -1);
+
+      if (strcmp (new_screen_name, "") != 0)
+        {
+          result = gdk_display_open (new_screen_name);
+          if (!result)
+            {
+              gchar *error_msg =
+                g_strdup_printf  ("Can't open display:\n\t%s\nplease try another one\n",
+                                  new_screen_name);
+              gtk_label_set_text (GTK_LABEL (dialog_label), error_msg);
+              g_free (error_msg);
+            }
+
+          g_free (new_screen_name);
+        }
+    }
+
+  gtk_widget_destroy (dialog);
+}
+
+/* Called when the user clicks on the "Close" button in the
+ * "Display" frame. Closes the selected display.
+ */
+static void
+close_display_cb (GtkWidget         *button,
+                  ChangeDisplayInfo *info)
+{
+  if (info->current_display)
+    gdk_display_close (info->current_display);
+}
+
+/* Called when the selected row in the display list changes.
+ * Updates info->current_display, then refills the list of
+ * screens.
+ */
+static void
+display_changed_cb (GtkTreeSelection  *selection,
+                    ChangeDisplayInfo *info)
+{
+  GtkTreeModel *model;
+  GtkTreeIter iter;
+
+  if (info->current_display)
+    g_object_unref (info->current_display);
+  if (gtk_tree_selection_get_selected (selection, &model, &iter))
+    gtk_tree_model_get (model, &iter,
+                        DISPLAY_COLUMN_DISPLAY, &info->current_display,
+                        -1);
+  else
+    info->current_display = NULL;
+}
+
+/* This function is used both for creating the "Display" and
+ * "Screen" frames, since they have a similar structure. The
+ * caller hooks up the right context for the value returned
+ * in tree_view, and packs any relevant buttons into button_vbox.
+ */
+static void
+create_frame (ChangeDisplayInfo *info,
+              const char        *title,
+              GtkWidget        **frame,
+              GtkWidget        **tree_view,
+              GtkWidget        **button_vbox)
+{
+  GtkTreeSelection *selection;
+  GtkWidget *scrollwin;
+  GtkWidget *hbox;
+
+  *frame = gtk_frame_new (title);
+
+  hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 8);
+  g_object_set (hbox, "margin", 8, NULL);
+  gtk_container_add (GTK_CONTAINER (*frame), hbox);
+
+  scrollwin = gtk_scrolled_window_new (NULL, NULL);
+  gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrollwin),
+                                  GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
+  gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scrollwin),
+                                       GTK_SHADOW_IN);
+  gtk_box_pack_start (GTK_BOX (hbox), scrollwin);
+
+  *tree_view = gtk_tree_view_new ();
+  gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (*tree_view), FALSE);
+  gtk_container_add (GTK_CONTAINER (scrollwin), *tree_view);
+
+  selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (*tree_view));
+  gtk_tree_selection_set_mode (selection, GTK_SELECTION_BROWSE);
+
+  *button_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
+  gtk_box_pack_start (GTK_BOX (hbox), *button_vbox);
+
+  if (!info->size_group)
+    info->size_group = gtk_size_group_new (GTK_SIZE_GROUP_HORIZONTAL);
+
+  gtk_size_group_add_widget (GTK_SIZE_GROUP (info->size_group), *button_vbox);
+}
+
+/* If we have a stack of buttons, it often looks better if their contents
+ * are left-aligned, rather than centered. This function creates a button
+ * and left-aligns it contents.
+ */
+GtkWidget *
+left_align_button_new (const char *label)
+{
+  GtkWidget *button = gtk_button_new_with_mnemonic (label);
+  GtkWidget *child = gtk_bin_get_child (GTK_BIN (button));
+
+  gtk_widget_set_halign (child, GTK_ALIGN_START);
+  gtk_widget_set_valign (child, GTK_ALIGN_CENTER);
+
+  return button;
+}
+
+/* Creates the "Display" frame in the main window.
+ */
+GtkWidget *
+create_display_frame (ChangeDisplayInfo *info)
+{
+  GtkWidget *frame;
+  GtkWidget *tree_view;
+  GtkWidget *button_vbox;
+  GtkTreeViewColumn *column;
+  GtkTreeSelection *selection;
+  GtkWidget *button;
+
+  create_frame (info, "Display", &frame, &tree_view, &button_vbox);
+
+  button = left_align_button_new ("_Open...");
+  g_signal_connect (button, "clicked",  G_CALLBACK (open_display_cb), info);
+  gtk_box_pack_start (GTK_BOX (button_vbox), button);
+
+  button = left_align_button_new ("_Close");
+  g_signal_connect (button, "clicked",  G_CALLBACK (close_display_cb), info);
+  gtk_box_pack_start (GTK_BOX (button_vbox), button);
+
+  info->display_model = (GtkTreeModel *)gtk_list_store_new (DISPLAY_NUM_COLUMNS,
+                                                            G_TYPE_STRING,
+                                                            GDK_TYPE_DISPLAY);
+
+  gtk_tree_view_set_model (GTK_TREE_VIEW (tree_view), info->display_model);
+
+  column = gtk_tree_view_column_new_with_attributes ("Name",
+                                                     gtk_cell_renderer_text_new (),
+                                                     "text", DISPLAY_COLUMN_NAME,
+                                                     NULL);
+  gtk_tree_view_append_column (GTK_TREE_VIEW (tree_view), column);
+
+  selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
+  g_signal_connect (selection, "changed",
+                    G_CALLBACK (display_changed_cb), info);
+
+  return frame;
+}
+
+/* Called when one of the currently open displays is closed.
+ * Remove it from our list of displays.
+ */
+static void
+display_closed_cb (GdkDisplay        *display,
+                   gboolean           is_error,
+                   ChangeDisplayInfo *info)
+{
+  GtkTreeIter iter;
+  gboolean valid;
+
+  for (valid = gtk_tree_model_get_iter_first (info->display_model, &iter);
+       valid;
+       valid = gtk_tree_model_iter_next (info->display_model, &iter))
+    {
+      GdkDisplay *tmp_display;
+
+      gtk_tree_model_get (info->display_model, &iter,
+                          DISPLAY_COLUMN_DISPLAY, &tmp_display,
+                          -1);
+      if (tmp_display == display)
+        {
+          gtk_list_store_remove (GTK_LIST_STORE (info->display_model), &iter);
+          break;
+        }
+    }
+}
+
+/* Adds a new display to our list of displays, and connects
+ * to the "closed" signal so that we can remove it from the
+ * list of displays again.
+ */
+static void
+add_display (ChangeDisplayInfo *info,
+             GdkDisplay        *display)
+{
+  const gchar *name = gdk_display_get_name (display);
+  GtkTreeIter iter;
+
+  gtk_list_store_append (GTK_LIST_STORE (info->display_model), &iter);
+  gtk_list_store_set (GTK_LIST_STORE (info->display_model), &iter,
+                      DISPLAY_COLUMN_NAME, name,
+                      DISPLAY_COLUMN_DISPLAY, display,
+                      -1);
+
+  g_signal_connect (display, "closed",
+                    G_CALLBACK (display_closed_cb), info);
+}
+
+/* Called when a new display is opened
+ */
+static void
+display_opened_cb (GdkDisplayManager *manager,
+                   GdkDisplay        *display,
+                   ChangeDisplayInfo *info)
+{
+  add_display (info, display);
+}
+
+/* Adds all currently open displays to our list of displays,
+ * and set up a signal connection so that we'll be notified
+ * when displays are opened in the future as well.
+ */
+static void
+initialize_displays (ChangeDisplayInfo *info)
+{
+  GdkDisplayManager *manager = gdk_display_manager_get ();
+  GSList *displays = gdk_display_manager_list_displays (manager);
+  GSList *tmp_list;
+
+  for (tmp_list = displays; tmp_list; tmp_list = tmp_list->next)
+    add_display (info, tmp_list->data);
+
+  g_slist_free (tmp_list);
+
+  g_signal_connect (manager, "display-opened",
+                    G_CALLBACK (display_opened_cb), info);
+}
+
+/* Cleans up when the toplevel is destroyed; we remove the
+ * connections we use to track currently open displays, then
+ * free the ChangeDisplayInfo structure.
+ */
+static void
+destroy_info (ChangeDisplayInfo *info)
+{
+  GdkDisplayManager *manager = gdk_display_manager_get ();
+  GSList *displays = gdk_display_manager_list_displays (manager);
+  GSList *tmp_list;
+
+  g_signal_handlers_disconnect_by_func (manager,
+                                        display_opened_cb,
+                                        info);
+
+  for (tmp_list = displays; tmp_list; tmp_list = tmp_list->next)
+    g_signal_handlers_disconnect_by_func (tmp_list->data,
+                                          display_closed_cb,
+                                          info);
+
+  g_slist_free (tmp_list);
+
+  g_object_unref (info->size_group);
+  g_object_unref (info->display_model);
+
+  if (info->current_display)
+    g_object_unref (info->current_display);
+
+  g_free (info);
+}
+
+static void
+destroy_cb (GObject            *object,
+            ChangeDisplayInfo **info)
+{
+  destroy_info (*info);
+  *info = NULL;
+}
+
+/* Main entry point. If the dialog for this demo doesn't yet exist, creates
+ * it. Otherwise, destroys it.
+ */
+GtkWidget *
+do_changedisplay (GtkWidget *do_widget)
+{
+  static ChangeDisplayInfo *info = NULL;
+
+  if (!info)
+    {
+      GtkWidget *content_area;
+      GtkWidget *vbox;
+      GtkWidget *frame;
+
+      info = g_new0 (ChangeDisplayInfo, 1);
+
+      info->window = gtk_dialog_new_with_buttons ("Change Display",
+                                                  GTK_WINDOW (do_widget),
+                                                  0,
+                                                  "Close", GTK_RESPONSE_CLOSE,
+                                                  "Change", GTK_RESPONSE_OK,
+                                                  NULL);
+
+      gtk_window_set_default_size (GTK_WINDOW (info->window), 300, 400);
+
+      g_signal_connect (info->window, "response",
+                        G_CALLBACK (response_cb), info);
+      g_signal_connect (info->window, "destroy",
+                        G_CALLBACK (destroy_cb), &info);
+
+      content_area = gtk_dialog_get_content_area (GTK_DIALOG (info->window));
+
+      vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
+      g_object_set (vbox, "margin", 8, NULL);
+      gtk_box_pack_start (GTK_BOX (content_area), vbox);
+
+      frame = create_display_frame (info);
+      gtk_box_pack_start (GTK_BOX (vbox), frame);
+
+      initialize_displays (info);
+
+      gtk_widget_show (info->window);
+      return info->window;
+    }
+  else
+    {
+      gtk_widget_destroy (info->window);
+      return NULL;
+    }
+}
--- a/demos/gtk-demo/clipboard.c
+++ b/demos/gtk-demo/clipboard.c
@@ -12,11 +12,10 @@
 #include <glib/gi18n.h>
 #include <gtk/gtk.h>
 #include <string.h>
-#include "demoimage.h"

 static GtkWidget *window = NULL;

-static void
+void
 copy_button_clicked (GtkWidget *button,
                     gpointer   user_data)
 {
@@ -29,10 +28,10 @@ copy_button_clicked (GtkWidget *button,
  clipboard = gtk_widget_get_clipboard (entry);

  /* Set clipboard text */
-  gdk_clipboard_set_text (clipboard, gtk_editable_get_text (GTK_EDITABLE (entry)));
+  gdk_clipboard_set_text (clipboard, gtk_entry_get_text (GTK_ENTRY (entry)));
 }

-static void
+void
 paste_received (GObject      *source_object,
                GAsyncResult *result,
                gpointer      user_data)
@@ -51,7 +50,7 @@ paste_received (GObject      *source_object,
  if (text)
    {
      /* Set the entry text */
-      gtk_editable_set_text (GTK_EDITABLE (entry), text);
+      gtk_entry_set_text (GTK_ENTRY (entry), text);
      g_free (text);
    }
  else
@@ -69,14 +68,14 @@ paste_received (GObject      *source_object,
                                       "Could not paste text: %s",
                                       error->message);
      g_signal_connect (dialog, "response",
-                        G_CALLBACK (gtk_window_destroy), NULL);
+                        G_CALLBACK (gtk_widget_destroy), NULL);
      gtk_widget_show (dialog);

      g_error_free (error);
    }
 }

-static void
+void
 paste_button_clicked (GtkWidget *button,
                      gpointer   user_data)
 {
@@ -94,6 +93,146 @@ paste_button_clicked (GtkWidget *button,
  gdk_clipboard_read_text_async (clipboard, NULL, paste_received, entry);
 }

+static GdkPaintable *
+get_image_paintable (GtkImage *image)
+{
+  const gchar *icon_name;
+  GtkIconTheme *icon_theme;
+  GtkIconInfo *icon_info;
+
+  switch (gtk_image_get_storage_type (image))
+    {
+    case GTK_IMAGE_PAINTABLE:
+      return g_object_ref (gtk_image_get_paintable (image));
+    case GTK_IMAGE_ICON_NAME:
+      icon_name = gtk_image_get_icon_name (image);
+      icon_theme = gtk_icon_theme_get_for_display (gtk_widget_get_display (GTK_WIDGET (image)));
+      icon_info = gtk_icon_theme_lookup_icon (icon_theme, icon_name, 48, GTK_ICON_LOOKUP_GENERIC_FALLBACK);
+      if (icon_info == NULL)
+        return NULL;
+      return GDK_PAINTABLE (gtk_icon_info_load_texture (icon_info));
+    default:
+      g_warning ("Image storage type %d not handled",
+                 gtk_image_get_storage_type (image));
+      return NULL;
+    }
+}
+
+static void
+drag_begin (GtkWidget      *widget,
+            GdkDrag        *drag,
+            gpointer        data)
+{
+  GdkPaintable *paintable;
+
+  paintable = get_image_paintable (GTK_IMAGE (widget));
+  if (paintable)
+    {
+      gtk_drag_set_icon_paintable (drag, paintable, -2, -2);
+      g_object_unref (paintable);
+    }
+}
+
+void
+drag_data_get (GtkWidget        *widget,
+               GdkDrag          *drag,
+               GtkSelectionData *selection_data,
+               guint             info,
+               gpointer          data)
+{
+  GdkPaintable *paintable;
+
+  paintable = get_image_paintable (GTK_IMAGE (widget));
+  if (GDK_IS_TEXTURE (paintable))
+    gtk_selection_data_set_texture (selection_data, GDK_TEXTURE (paintable));
+}
+
+static void
+drag_data_received (GtkWidget        *widget,
+                    GdkDrop          *drop,
+                    GtkSelectionData *selection_data,
+                    gpointer          data)
+{
+  if (gtk_selection_data_get_length (selection_data) > 0)
+    {
+      GdkTexture *texture;
+
+      texture = gtk_selection_data_get_texture (selection_data);
+      gtk_image_set_from_paintable (GTK_IMAGE (data), GDK_PAINTABLE (texture));
+      g_object_unref (texture);
+    }
+}
+
+static void
+copy_image (GtkMenuItem *item,
+            gpointer     data)
+{
+  GdkClipboard *clipboard;
+  GdkPaintable *paintable;
+
+  clipboard = gtk_widget_get_clipboard (GTK_WIDGET (data));
+  paintable = get_image_paintable (GTK_IMAGE (data));
+
+  if (GDK_IS_TEXTURE (paintable))
+    gdk_clipboard_set_texture (clipboard, GDK_TEXTURE (paintable));
+
+  if (paintable)
+    g_object_unref (paintable);
+}
+
+static void
+paste_image_received (GObject      *source,
+                      GAsyncResult *result,
+                      gpointer      data)
+{
+  GdkTexture *texture;
+
+  texture = gdk_clipboard_read_texture_finish (GDK_CLIPBOARD (source), result, NULL);
+  if (texture == NULL)
+    return;
+    
+  gtk_image_set_from_paintable (GTK_IMAGE (data), GDK_PAINTABLE (texture));
+  g_object_unref (texture);
+}
+
+static void
+paste_image (GtkMenuItem *item,
+             gpointer     data)
+{
+  GdkClipboard *clipboard;
+
+  clipboard = gtk_widget_get_clipboard (GTK_WIDGET (data));
+  gdk_clipboard_read_texture_async (clipboard,
+                                    NULL,
+                                    paste_image_received,
+                                    data);
+}
+
+static void
+pressed_cb (GtkGesture *gesture,
+            int         n_press,
+            double      x,
+            double      y,
+            GtkWidget  *image)
+{
+  GtkWidget *menu;
+  GtkWidget *item;
+
+  menu = gtk_menu_new ();
+
+  item = gtk_menu_item_new_with_mnemonic (_("_Copy"));
+  g_signal_connect (item, "activate", G_CALLBACK (copy_image), image);
+  gtk_widget_show (item);
+  gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
+
+  item = gtk_menu_item_new_with_mnemonic (_("_Paste"));
+  g_signal_connect (item, "activate", G_CALLBACK (paste_image), image);
+  gtk_widget_show (item);
+  gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
+
+  gtk_menu_popup_at_pointer (GTK_MENU (menu), NULL);
+}
+
 GtkWidget *
 do_clipboard (GtkWidget *do_widget)
 {
@@ -103,89 +242,118 @@ do_clipboard (GtkWidget *do_widget)
      GtkWidget *label;
      GtkWidget *entry, *button;
      GtkWidget *image;
+      GtkGesture *gesture;

-      window = gtk_window_new ();
+      window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
      gtk_window_set_display (GTK_WINDOW (window),
                              gtk_widget_get_display (do_widget));
      gtk_window_set_title (GTK_WINDOW (window), "Clipboard");
-      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
+
+      g_signal_connect (window, "destroy",
+                        G_CALLBACK (gtk_widget_destroyed), &window);

      vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
-      gtk_widget_set_margin_start (vbox, 8);
-      gtk_widget_set_margin_end (vbox, 8);
-      gtk_widget_set_margin_top (vbox, 8);
-      gtk_widget_set_margin_bottom (vbox, 8);
+      g_object_set (vbox, "margin", 8, NULL);

-      gtk_window_set_child (GTK_WINDOW (window), vbox);
+      gtk_container_add (GTK_CONTAINER (window), vbox);

      label = gtk_label_new ("\"Copy\" will copy the text\nin the entry to the clipboard");

-      gtk_box_append (GTK_BOX (vbox), label);
+      gtk_box_pack_start (GTK_BOX (vbox), label);

      hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);
-      gtk_widget_set_margin_start (hbox, 8);
-      gtk_widget_set_margin_end (hbox, 8);
-      gtk_widget_set_margin_top (hbox, 8);
-      gtk_widget_set_margin_bottom (hbox, 8);
-      gtk_box_append (GTK_BOX (vbox), hbox);
+      g_object_set (hbox, "margin", 8, NULL);
+      gtk_box_pack_start (GTK_BOX (vbox), hbox);

      /* Create the first entry */
      entry = gtk_entry_new ();
-      gtk_box_append (GTK_BOX (hbox), entry);
+      gtk_box_pack_start (GTK_BOX (hbox), entry);

      /* Create the button */
      button = gtk_button_new_with_mnemonic (_("_Copy"));
-      gtk_box_append (GTK_BOX (hbox), button);
+      gtk_box_pack_start (GTK_BOX (hbox), button);
      g_signal_connect (button, "clicked",
                        G_CALLBACK (copy_button_clicked), entry);

      label = gtk_label_new ("\"Paste\" will paste the text from the clipboard to the entry");
-      gtk_box_append (GTK_BOX (vbox), label);
+      gtk_box_pack_start (GTK_BOX (vbox), label);

      hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);
-      gtk_widget_set_margin_start (hbox, 8);
-      gtk_widget_set_margin_end (hbox, 8);
-      gtk_widget_set_margin_top (hbox, 8);
-      gtk_widget_set_margin_bottom (hbox, 8);
-      gtk_box_append (GTK_BOX (vbox), hbox);
+      g_object_set (hbox, "margin", 8, NULL);
+      gtk_box_pack_start (GTK_BOX (vbox), hbox);

      /* Create the second entry */
      entry = gtk_entry_new ();
-      gtk_box_append (GTK_BOX (hbox), entry);
+      gtk_box_pack_start (GTK_BOX (hbox), entry);

      /* Create the button */
      button = gtk_button_new_with_mnemonic (_("_Paste"));
-      gtk_box_append (GTK_BOX (hbox), button);
+      gtk_box_pack_start (GTK_BOX (hbox), button);
      g_signal_connect (button, "clicked",
                        G_CALLBACK (paste_button_clicked), entry);

      label = gtk_label_new ("Images can be transferred via the clipboard, too");
-      gtk_box_append (GTK_BOX (vbox), label);
+      gtk_box_pack_start (GTK_BOX (vbox), label);

      hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);
-      gtk_widget_set_margin_start (hbox, 8);
-      gtk_widget_set_margin_end (hbox, 8);
-      gtk_widget_set_margin_top (hbox, 8);
-      gtk_widget_set_margin_bottom (hbox, 8);
-      gtk_box_append (GTK_BOX (vbox), hbox);
+      g_object_set (hbox, "margin", 8, NULL);
+      gtk_box_pack_start (GTK_BOX (vbox), hbox);

      /* Create the first image */
-      image = demo_image_new ("dialog-warning");
-      gtk_box_append (GTK_BOX (hbox), image);
+      image = gtk_image_new_from_icon_name ("dialog-warning");
+      gtk_container_add (GTK_CONTAINER (hbox), image);
+
+      /* make image a drag source */
+      gtk_drag_source_set (image, GDK_BUTTON1_MASK, NULL, GDK_ACTION_COPY);
+      gtk_drag_source_add_image_targets (image);
+      g_signal_connect (image, "drag-begin",
+                        G_CALLBACK (drag_begin), image);
+      g_signal_connect (image, "drag-data-get",
+                        G_CALLBACK (drag_data_get), image);
+
+      /* accept drops on image */
+      gtk_drag_dest_set (image, GTK_DEST_DEFAULT_ALL,
+                         NULL, GDK_ACTION_COPY);
+      gtk_drag_dest_add_image_targets (image);
+      g_signal_connect (image, "drag-data-received",
+                        G_CALLBACK (drag_data_received), image);
+
+      /* context menu on image */
+      gesture = gtk_gesture_multi_press_new ();
+      gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (gesture), GDK_BUTTON_SECONDARY);
+      g_signal_connect (gesture, "pressed", G_CALLBACK (pressed_cb), image);
+      gtk_widget_add_controller (image, GTK_EVENT_CONTROLLER (gesture));

      /* Create the second image */
-      image = demo_image_new ("process-stop");
-      gtk_box_append (GTK_BOX (hbox), image);
+      image = gtk_image_new_from_icon_name ("process-stop");
+      gtk_container_add (GTK_CONTAINER (hbox), image);

-      /* Create the third image */
-      image = demo_image_new ("weather-clear");
-      gtk_box_append (GTK_BOX (hbox), image);
+      /* make image a drag source */
+      gtk_drag_source_set (image, GDK_BUTTON1_MASK, NULL, GDK_ACTION_COPY);
+      gtk_drag_source_add_image_targets (image);
+      g_signal_connect (image, "drag-begin",
+                        G_CALLBACK (drag_begin), image);
+      g_signal_connect (image, "drag-data-get",
+                        G_CALLBACK (drag_data_get), image);
+
+      /* accept drops on image */
+      gtk_drag_dest_set (image, GTK_DEST_DEFAULT_ALL,
+                         NULL, GDK_ACTION_COPY);
+      gtk_drag_dest_add_image_targets (image);
+      g_signal_connect (image, "drag-data-received",
+                        G_CALLBACK (drag_data_received), image);
+
+      /* context menu on image */
+      gesture = gtk_gesture_multi_press_new ();
+      gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (gesture), GDK_BUTTON_SECONDARY);
+      g_signal_connect (gesture, "pressed", G_CALLBACK (pressed_cb), image);
+      gtk_widget_add_controller (image, GTK_EVENT_CONTROLLER (gesture));
    }

  if (!gtk_widget_get_visible (window))
    gtk_widget_show (window);
  else
-    gtk_window_destroy (GTK_WINDOW (window));
+    gtk_widget_destroy (window);

  return window;
 }
--- a/demos/gtk-demo/cogs.glsl
+++ b/demos/gtk-demo/cogs.glsl
@@ -1,224 +0,0 @@
-// Originally from: https://www.shadertoy.com/view/3ljyDD
-// License CC0: Hexagonal tiling + cog wheels
-//  Nothing fancy, just hexagonal tiling + cog wheels
-
-#define PI      3.141592654
-#define TAU     (2.0*PI)
-#define MROT(a) mat2(cos(a), sin(a), -sin(a), cos(a))
-
-float hash(in vec2 co) {
-  return fract(sin(dot(co.xy ,vec2(12.9898,58.233))) * 13758.5453);
-}
-
-float pcos(float a) {
-  return 0.5 + 0.5*cos(a);
-}
-
-void rot(inout vec2 p, float a) {
-  float c = cos(a);
-  float s = sin(a);
-  p = vec2(c*p.x + s*p.y, -s*p.x + c*p.y);
-}
-
-float modPolar(inout vec2 p, float repetitions) {
-  float angle = 2.0*PI/repetitions;
-  float a = atan(p.y, p.x) + angle/2.;
-  float r = length(p);
-  float c = floor(a/angle);
-  a = mod(a,angle) - angle/2.;
-  p = vec2(cos(a), sin(a))*r;
-  // For an odd number of repetitions, fix cell index of the cell in -x direction
-  // (cell index would be e.g. -5 and 5 in the two halves of the cell):
-  if (abs(c) >= (repetitions/2.0)) c = abs(c);
-  return c;
-}
-
-float pmin(float a, float b, float k) {
-  float h = clamp( 0.5+0.5*(b-a)/k, 0.0, 1.0 );
-  return mix( b, a, h ) - k*h*(1.0-h);
-}
-
-const vec2 sz       = vec2(1.0, sqrt(3.0));
-const vec2 hsz      = 0.5*sz;
-const float smallCount = 16.0;
-
-vec2 hextile(inout vec2 p) {
-  // See Art of Code: Hexagonal Tiling Explained!
-  // https://www.youtube.com/watch?v=VmrIDyYiJBA
-
-  vec2 p1 = mod(p, sz)-hsz;
-  vec2 p2 = mod(p - hsz*1.0, sz)-hsz;
-  vec2 p3 = mix(p2, p1, vec2(length(p1) < length(p2)));
-  vec2 n = p3 - p;
-  p = p3;
-
-  return n;
-}
-
-float circle(vec2 p, float r) {
-  return length(p) - r;
-}
-
-float box(vec2 p, vec2 b) {
-  vec2 d = abs(p)-b;
-  return length(max(d,0.0)) + min(max(d.x,d.y),0.0);
-}
-
-float unevenCapsule(vec2 p, float r1, float r2, float h) {
-  p.x = abs(p.x);
-  float b = (r1-r2)/h;
-  float a = sqrt(1.0-b*b);
-  float k = dot(p,vec2(-b,a));
-  if( k < 0.0 ) return length(p) - r1;
-  if( k > a*h ) return length(p-vec2(0.0,h)) - r2;
-  return dot(p, vec2(a,b) ) - r1;
-}
-
-float cogwheel(vec2 p, float innerRadius, float outerRadius, float cogs, float holes) {
-  float cogWidth  = 0.25*innerRadius*TAU/cogs;
-
-  float d0 = circle(p, innerRadius);
-
-  vec2 icp = p;
-  modPolar(icp, holes);
-  icp -= vec2(innerRadius*0.55, 0.0);
-  float d1 = circle(icp, innerRadius*0.25);
-
-  vec2 cp = p;
-  modPolar(cp, cogs);
-  cp -= vec2(innerRadius, 0.0);
-  float d2 = unevenCapsule(cp.yx, cogWidth, cogWidth*0.75, (outerRadius-innerRadius));
-
-  float d3 = circle(p, innerRadius*0.20);
-
-  float d = 1E6;
-  d = min(d, d0);
-  d = pmin(d, d2, 0.5*cogWidth);
-  d = min(d, d2);
-  d = max(d, -d1);
-  d = max(d, -d3);
-
-  return d;
-}
-
-float ccell1(vec2 p, float r) {
-  float d = 1E6;
-  const float bigCount = 60.0;
-
-  vec2 cp0 = p;
-  rot(cp0, -iTime*TAU/bigCount);
-  float d0 = cogwheel(cp0, 0.36, 0.38, bigCount, 5.0);
-
-  vec2 cp1 = p;
-  float nm = modPolar(cp1, 6.0);
-
-  cp1 -= vec2(0.5, 0.0);
-  rot(cp1, 0.2+TAU*nm/2.0 + iTime*TAU/smallCount);
-  float d1 = cogwheel(cp1, 0.11, 0.125, smallCount, 5.0);
-
-  d = min(d, d0);
-  d = min(d, d1);
-  return d;
-}
-
-float ccell2(vec2 p, float r) {
-  float d = 1E6;
-  vec2 cp0 = p;
-  float nm = modPolar(cp0, 6.0);
-  vec2 cp1 = cp0;
-  const float off = 0.275;
-  const float count = smallCount + 2.0;
-  cp0 -= vec2(off, 0.0);
-  rot(cp0, 0.+TAU*nm/2.0 - iTime*TAU/count);
-  float d0 = cogwheel(cp0, 0.09, 0.105, count, 5.0);
-
-
-  cp1 -= vec2(0.5, 0.0);
-  rot(cp1, 0.2+TAU*nm/2.0 + iTime*TAU/smallCount);
-  float d1 = cogwheel(cp1, 0.11, 0.125, smallCount, 5.0);
-
-  float l = length(p);
-  float d2 = l - (off+0.055);
-  float d3 = d2 + 0.020;;
-
-  vec2 tp0 = p;
-  modPolar(tp0, 60.0);
-  tp0.x -= off;
-  float d4 = box(tp0, vec2(0.0125, 0.005));
-
-  float ctime = -(iTime*0.05 + r)*TAU;
-
-  vec2 tp1 = p;
-  rot(tp1, ctime*12.0);
-  tp1.x -= 0.13;
-  float d5 = box(tp1, vec2(0.125, 0.005));
-
-  vec2 tp2 = p;
-  rot(tp2, ctime);
-  tp2.x -= 0.13*0.5;
-  float d6 = box(tp2, vec2(0.125*0.5, 0.0075));
-
-  float d7 = l - 0.025;
-  float d8 = l - 0.0125;
-
-  d = min(d, d0);
-  d = min(d, d1);
-  d = min(d, d2);
-  d = max(d, -d3);
-  d = min(d, d4);
-  d = min(d, d5);
-  d = min(d, d6);
-  d = min(d, d7);
-  d = max(d, -d8);
-
-  return d;
-}
-
-float df(vec2 p, float scale, inout vec2 nn) {
-  p /= scale;
-  nn = hextile(p);
-  nn = floor(nn + 0.5);
-  float r = hash(nn);
-
-  float d;;
-
-  if (r < 0.5) {
-    d = ccell1(p, r);
-  } else {
-    d = ccell2(p, r);
-  }
-
-  return d*scale;
-}
-
-vec3 postProcess(vec3 col, vec2 q)  {
-  //col = saturate(col);
-  col=pow(clamp(col,0.0,1.0),vec3(0.75));
-  col=col*0.6+0.4*col*col*(3.0-2.0*col);  // contrast
-  col=mix(col, vec3(dot(col, vec3(0.33))), -0.4);  // satuation
-  col*=0.5+0.5*pow(19.0*q.x*q.y*(1.0-q.x)*(1.0-q.y),0.7);  // vigneting
-  return col;
-}
-
-void mainImage(out vec4 fragColor, vec2 fragCoord) {
-  vec2 q = fragCoord/iResolution.xy;
-  vec2 p = -1.0 + 2.0*q;
-  p.x *= iResolution.x/iResolution.y;
-  float tm = iTime*0.1;
-  p += vec2(cos(tm), sin(tm*sqrt(0.5)));
-  float z = mix(0.5, 1.0, pcos(tm*sqrt(0.3)));
-  float aa = 4.0 / iResolution.y;
-
-  vec2 nn = vec2(0.0);
-  float d = df(p, z, nn);
-
-  vec3 col = vec3(160.0)/vec3(255.0);
-  vec3 baseCol = vec3(0.3);
-  vec4 logoCol = vec4(baseCol, 1.0)*smoothstep(-aa, 0.0, -d);
-  col = mix(col, logoCol.xyz, pow(logoCol.w, 8.0));
-  col += 0.4*pow(abs(sin(20.0*d)), 0.6);
-
-  col = postProcess(col, q);
-
-  fragColor = vec4(col, 1.0);
-}
--- a/demos/gtk-demo/cogs2.glsl
+++ b/demos/gtk-demo/cogs2.glsl
@@ -1,226 +0,0 @@
-uniform float iTime;
-
-// Originally from: https://www.shadertoy.com/view/3ljyDD
-// License CC0: Hexagonal tiling + cog wheels
-//  Nothing fancy, just hexagonal tiling + cog wheels
-
-#define PI      3.141592654
-#define TAU     (2.0*PI)
-#define MROT(a) mat2(cos(a), sin(a), -sin(a), cos(a))
-
-float hash(in vec2 co) {
-  return fract(sin(dot(co.xy ,vec2(12.9898,58.233))) * 13758.5453);
-}
-
-float pcos(float a) {
-  return 0.5 + 0.5*cos(a);
-}
-
-void rot(inout vec2 p, float a) {
-  float c = cos(a);
-  float s = sin(a);
-  p = vec2(c*p.x + s*p.y, -s*p.x + c*p.y);
-}
-
-float modPolar(inout vec2 p, float repetitions) {
-  float angle = 2.0*PI/repetitions;
-  float a = atan(p.y, p.x) + angle/2.;
-  float r = length(p);
-  float c = floor(a/angle);
-  a = mod(a,angle) - angle/2.;
-  p = vec2(cos(a), sin(a))*r;
-  // For an odd number of repetitions, fix cell index of the cell in -x direction
-  // (cell index would be e.g. -5 and 5 in the two halves of the cell):
-  if (abs(c) >= (repetitions/2.0)) c = abs(c);
-  return c;
-}
-
-float pmin(float a, float b, float k) {
-  float h = clamp( 0.5+0.5*(b-a)/k, 0.0, 1.0 );
-  return mix( b, a, h ) - k*h*(1.0-h);
-}
-
-const vec2 sz       = vec2(1.0, sqrt(3.0));
-const vec2 hsz      = 0.5*sz;
-const float smallCount = 16.0;
-
-vec2 hextile(inout vec2 p) {
-  // See Art of Code: Hexagonal Tiling Explained!
-  // https://www.youtube.com/watch?v=VmrIDyYiJBA
-
-  vec2 p1 = mod(p, sz)-hsz;
-  vec2 p2 = mod(p - hsz*1.0, sz)-hsz;
-  vec2 p3 = mix(p2, p1, vec2(length(p1) < length(p2)));
-  vec2 n = p3 - p;
-  p = p3;
-
-  return n;
-}
-
-float circle(vec2 p, float r) {
-  return length(p) - r;
-}
-
-float box(vec2 p, vec2 b) {
-  vec2 d = abs(p)-b;
-  return length(max(d,0.0)) + min(max(d.x,d.y),0.0);
-}
-
-float unevenCapsule(vec2 p, float r1, float r2, float h) {
-  p.x = abs(p.x);
-  float b = (r1-r2)/h;
-  float a = sqrt(1.0-b*b);
-  float k = dot(p,vec2(-b,a));
-  if( k < 0.0 ) return length(p) - r1;
-  if( k > a*h ) return length(p-vec2(0.0,h)) - r2;
-  return dot(p, vec2(a,b) ) - r1;
-}
-
-float cogwheel(vec2 p, float innerRadius, float outerRadius, float cogs, float holes) {
-  float cogWidth  = 0.25*innerRadius*TAU/cogs;
-
-  float d0 = circle(p, innerRadius);
-
-  vec2 icp = p;
-  modPolar(icp, holes);
-  icp -= vec2(innerRadius*0.55, 0.0);
-  float d1 = circle(icp, innerRadius*0.25);
-
-  vec2 cp = p;
-  modPolar(cp, cogs);
-  cp -= vec2(innerRadius, 0.0);
-  float d2 = unevenCapsule(cp.yx, cogWidth, cogWidth*0.75, (outerRadius-innerRadius));
-
-  float d3 = circle(p, innerRadius*0.20);
-
-  float d = 1E6;
-  d = min(d, d0);
-  d = pmin(d, d2, 0.5*cogWidth);
-  d = min(d, d2);
-  d = max(d, -d1);
-  d = max(d, -d3);
-
-  return d;
-}
-
-float ccell1(vec2 p, float r) {
-  float d = 1E6;
-  const float bigCount = 60.0;
-
-  vec2 cp0 = p;
-  rot(cp0, -iTime*TAU/bigCount);
-  float d0 = cogwheel(cp0, 0.36, 0.38, bigCount, 5.0);
-
-  vec2 cp1 = p;
-  float nm = modPolar(cp1, 6.0);
-
-  cp1 -= vec2(0.5, 0.0);
-  rot(cp1, 0.2+TAU*nm/2.0 + iTime*TAU/smallCount);
-  float d1 = cogwheel(cp1, 0.11, 0.125, smallCount, 5.0);
-
-  d = min(d, d0);
-  d = min(d, d1);
-  return d;
-}
-
-float ccell2(vec2 p, float r) {
-  float d = 1E6;
-  vec2 cp0 = p;
-  float nm = modPolar(cp0, 6.0);
-  vec2 cp1 = cp0;
-  const float off = 0.275;
-  const float count = smallCount + 2.0;
-  cp0 -= vec2(off, 0.0);
-  rot(cp0, 0.+TAU*nm/2.0 - iTime*TAU/count);
-  float d0 = cogwheel(cp0, 0.09, 0.105, count, 5.0);
-
-
-  cp1 -= vec2(0.5, 0.0);
-  rot(cp1, 0.2+TAU*nm/2.0 + iTime*TAU/smallCount);
-  float d1 = cogwheel(cp1, 0.11, 0.125, smallCount, 5.0);
-
-  float l = length(p);
-  float d2 = l - (off+0.055);
-  float d3 = d2 + 0.020;;
-
-  vec2 tp0 = p;
-  modPolar(tp0, 60.0);
-  tp0.x -= off;
-  float d4 = box(tp0, vec2(0.0125, 0.005));
-
-  float ctime = -(iTime*0.05 + r)*TAU;
-
-  vec2 tp1 = p;
-  rot(tp1, ctime*12.0);
-  tp1.x -= 0.13;
-  float d5 = box(tp1, vec2(0.125, 0.005));
-
-  vec2 tp2 = p;
-  rot(tp2, ctime);
-  tp2.x -= 0.13*0.5;
-  float d6 = box(tp2, vec2(0.125*0.5, 0.0075));
-
-  float d7 = l - 0.025;
-  float d8 = l - 0.0125;
-
-  d = min(d, d0);
-  d = min(d, d1);
-  d = min(d, d2);
-  d = max(d, -d3);
-  d = min(d, d4);
-  d = min(d, d5);
-  d = min(d, d6);
-  d = min(d, d7);
-  d = max(d, -d8);
-
-  return d;
-}
-
-float df(vec2 p, float scale, inout vec2 nn) {
-  p /= scale;
-  nn = hextile(p);
-  nn = floor(nn + 0.5);
-  float r = hash(nn);
-
-  float d;;
-
-  if (r < 0.5) {
-    d = ccell1(p, r);
-  } else {
-    d = ccell2(p, r);
-  }
-
-  return d*scale;
-}
-
-vec3 postProcess(vec3 col, vec2 q)  {
-  //col = saturate(col);
-  col=pow(clamp(col,0.0,1.0),vec3(0.75));
-  col=col*0.6+0.4*col*col*(3.0-2.0*col);  // contrast
-  col=mix(col, vec3(dot(col, vec3(0.33))), -0.4);  // satuation
-  col*=0.5+0.5*pow(19.0*q.x*q.y*(1.0-q.x)*(1.0-q.y),0.7);  // vigneting
-  return col;
-}
-
-void mainImage(out vec4 fragColor, in vec2 fragCoord, in vec2 resolution, in vec2 uv) {
-  vec2 q = fragCoord/resolution.xy;
-  vec2 p = -1.0 + 2.0*q;
-  p.x *= resolution.x/resolution.y;
-  float tm = iTime*0.1;
-  p += vec2(cos(tm), sin(tm*sqrt(0.5)));
-  float z = mix(0.5, 1.0, pcos(tm*sqrt(0.3)));
-  float aa = 4.0 / resolution.y;
-
-  vec2 nn = vec2(0.0);
-  float d = df(p, z, nn);
-
-  vec3 col = vec3(160.0)/vec3(255.0);
-  vec3 baseCol = vec3(0.3);
-  vec4 logoCol = vec4(baseCol, 1.0)*smoothstep(-aa, 0.0, -d);
-  col = mix(col, logoCol.xyz, pow(logoCol.w, 8.0));
-  col += 0.4*pow(abs(sin(20.0*d)), 0.6);
-
-  col = postProcess(col, q);
-
-  fragColor = vec4(col, 1.0);
-}
--- a/demos/gtk-demo/color.names.txt
+++ b/demos/gtk-demo/color.names.txt
--- a/demos/gtk-demo/colorsel.c
+++ b/demos/gtk-demo/colorsel.c
@@ -0,0 +1,116 @@
+/* Color Chooser
+ *
+ * A GtkColorChooser lets the user choose a color. There are several
+ * implementations of the GtkColorChooser interface in GTK+. The
+ * GtkColorChooserDialog is a prebuilt dialog containing a
+ * GtkColorChooserWidget.
+ */
+
+#include <gtk/gtk.h>
+
+static GtkWidget *window = NULL;
+static GtkWidget *da;
+static GdkRGBA color;
+static GtkWidget *frame;
+
+/* draw callback for the drawing area
+ */
+static void
+draw_function (GtkDrawingArea *da,
+               cairo_t        *cr,
+               int             width,
+               int             height,
+               gpointer        data)
+{
+  gdk_cairo_set_source_rgba (cr, &color);
+  cairo_paint (cr);
+}
+
+static void
+response_cb (GtkDialog *dialog,
+             gint       response_id,
+             gpointer   user_data)
+{
+  if (response_id == GTK_RESPONSE_OK)
+    {
+      gtk_color_chooser_get_rgba (GTK_COLOR_CHOOSER (dialog), &color);
+      gtk_widget_queue_draw (da);
+    }
+
+  gtk_widget_destroy (GTK_WIDGET (dialog));
+}
+
+static void
+change_color_callback (GtkWidget *button,
+                       gpointer   data)
+{
+  GtkWidget *dialog;
+
+  dialog = gtk_color_chooser_dialog_new ("Changing color", GTK_WINDOW (window));
+  gtk_window_set_modal (GTK_WINDOW (dialog), TRUE);
+  gtk_color_chooser_set_rgba (GTK_COLOR_CHOOSER (dialog), &color);
+
+  g_signal_connect (dialog, "response",
+                    G_CALLBACK (response_cb), NULL);
+
+  gtk_widget_show (dialog);
+}
+
+GtkWidget *
+do_colorsel (GtkWidget *do_widget)
+{
+  GtkWidget *vbox;
+  GtkWidget *button;
+
+  if (!window)
+    {
+      color.red = 0;
+      color.blue = 1;
+      color.green = 0;
+      color.alpha = 1;
+
+      window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+      gtk_window_set_display (GTK_WINDOW (window),
+                              gtk_widget_get_display (do_widget));
+      gtk_window_set_title (GTK_WINDOW (window), "Color Chooser");
+      gtk_window_set_resizable (GTK_WINDOW (window), FALSE);
+
+      g_signal_connect (window, "destroy",
+                        G_CALLBACK (gtk_widget_destroyed), &window);
+
+      vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 8);
+      g_object_set (vbox, "margin", 12, NULL);
+      gtk_container_add (GTK_CONTAINER (window), vbox);
+
+      /*
+       * Create the color swatch area
+       */
+
+      frame = gtk_frame_new (NULL);
+      gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
+      gtk_box_pack_start (GTK_BOX (vbox), frame);
+
+      da = gtk_drawing_area_new ();
+      gtk_drawing_area_set_content_width (GTK_DRAWING_AREA (da), 200);
+      gtk_drawing_area_set_content_height (GTK_DRAWING_AREA (da), 200);
+      gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (da), draw_function, NULL, NULL);
+
+      gtk_container_add (GTK_CONTAINER (frame), da);
+
+      button = gtk_button_new_with_mnemonic ("_Change the above color");
+      gtk_widget_set_halign (button, GTK_ALIGN_END);
+      gtk_widget_set_valign (button, GTK_ALIGN_CENTER);
+
+      gtk_box_pack_start (GTK_BOX (vbox), button);
+
+      g_signal_connect (button, "clicked",
+                        G_CALLBACK (change_color_callback), NULL);
+    }
+
+  if (!gtk_widget_get_visible (window))
+    gtk_widget_show (window);
+  else
+    gtk_widget_destroy (window);
+
+  return window;
+}
--- a/demos/gtk-demo/combobox.c
+++ b/demos/gtk-demo/combobox.c
@@ -1,5 +1,4 @@
 /* Combo Boxes
- * #Keywords: GtkCellRenderer
 *
 * The GtkComboBox widget allows to select one option out of a list.
 * The GtkComboBoxEntry additionally allows the user to enter a value
@@ -20,7 +19,7 @@ enum
 static GtkTreeModel *
 create_icon_store (void)
 {
-  const char *icon_names[6] = {
+  const gchar *icon_names[6] = {
    "dialog-warning",
    "process-stop",
    "document-new",
@@ -28,7 +27,7 @@ create_icon_store (void)
    NULL,
    "document-open"
  };
-  const char *labels[6] = {
+  const gchar *labels[6] = {
    N_("Warning"),
    N_("Stop"),
    N_("New"),
@@ -39,7 +38,7 @@ create_icon_store (void)

  GtkTreeIter iter;
  GtkListStore *store;
-  int i;
+  gint i;

  store = gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_STRING);

@@ -78,7 +77,7 @@ set_sensitive (GtkCellLayout   *cell_layout,
               gpointer         data)
 {
  GtkTreePath *path;
-  int *indices;
+  gint *indices;
  gboolean sensitive;

  path = gtk_tree_model_get_path (tree_model, iter);
@@ -112,8 +111,8 @@ static GtkTreeModel *
 create_capital_store (void)
 {
  struct {
-    const char *group;
-    const char *capital;
+    gchar *group;
+    gchar *capital;
  } capitals[] = {
    { "A - B", NULL },
    { NULL, "Albany" },
@@ -145,7 +144,7 @@ create_capital_store (void)
    { NULL, "Jackson" },
    { NULL, "Jefferson City" },
    { NULL, "Juneau" },
-    { "K - O", NULL },
+    { "K - O" },
    { NULL, "Lansing" },
    { NULL, "Lincoln" },
    { NULL, "Little Rock" },
@@ -155,7 +154,7 @@ create_capital_store (void)
    { NULL, "Nashville" },
    { NULL, "Oklahoma City" },
    { NULL, "Olympia" },
-    { "P - S", NULL },
+    { NULL, "P - S" },
    { NULL, "Phoenix" },
    { NULL, "Pierre" },
    { NULL, "Providence" },
@@ -176,7 +175,7 @@ create_capital_store (void)

  GtkTreeIter iter, iter2;
  GtkTreeStore *store;
-  int i;
+  gint i;

  store = gtk_tree_store_new (1, G_TYPE_STRING);

@@ -235,7 +234,7 @@ typedef struct _MaskEntry MaskEntry;
 struct _MaskEntry
 {
  GtkEntry entry;
-  const char *mask;
+  gchar *mask;
 };

 typedef struct _MaskEntryClass MaskEntryClass;
@@ -247,7 +246,6 @@ struct _MaskEntryClass

 static void mask_entry_editable_init (GtkEditableInterface *iface);

-static GType mask_entry_get_type (void);
 G_DEFINE_TYPE_WITH_CODE (MaskEntry, mask_entry, GTK_TYPE_ENTRY,
                         G_IMPLEMENT_INTERFACE (GTK_TYPE_EDITABLE,
                                                mask_entry_editable_init));
@@ -258,7 +256,7 @@ mask_entry_set_background (MaskEntry *entry)
 {
  if (entry->mask)
    {
-      if (!g_regex_match_simple (entry->mask, gtk_editable_get_text (GTK_EDITABLE (entry)), 0, 0))
+      if (!g_regex_match_simple (entry->mask, gtk_entry_get_text (GTK_ENTRY (entry)), 0, 0))
        {
          PangoAttrList *attrs;

@@ -312,36 +310,32 @@ do_combobox (GtkWidget *do_widget)

  if (!window)
  {
-    window = gtk_window_new ();
+    window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
    gtk_window_set_display (GTK_WINDOW (window),
                            gtk_widget_get_display (do_widget));
    gtk_window_set_title (GTK_WINDOW (window), "Combo Boxes");
-    g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
+
+    g_signal_connect (window, "destroy",
+                      G_CALLBACK (gtk_widget_destroyed), &window);

    vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 2);
-    gtk_widget_set_margin_start (vbox, 10);
-    gtk_widget_set_margin_end (vbox, 10);
-    gtk_widget_set_margin_top (vbox, 10);
-    gtk_widget_set_margin_bottom (vbox, 10);
-    gtk_window_set_child (GTK_WINDOW (window), vbox);
+    g_object_set (vbox, "margin", 10, NULL);
+    gtk_container_add (GTK_CONTAINER (window), vbox);

    /* A combobox demonstrating cell renderers, separators and
     *  insensitive rows
     */
    frame = gtk_frame_new ("Items with icons");
-    gtk_box_append (GTK_BOX (vbox), frame);
+    gtk_box_pack_start (GTK_BOX (vbox), frame);

    box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
-    gtk_widget_set_margin_start (box, 5);
-    gtk_widget_set_margin_end (box, 5);
-    gtk_widget_set_margin_top (box, 5);
-    gtk_widget_set_margin_bottom (box, 5);
-    gtk_frame_set_child (GTK_FRAME (frame), box);
+    g_object_set (box, "margin", 5, NULL);
+    gtk_container_add (GTK_CONTAINER (frame), box);

    model = create_icon_store ();
    combo = gtk_combo_box_new_with_model (model);
    g_object_unref (model);
-    gtk_box_append (GTK_BOX (box), combo);
+    gtk_container_add (GTK_CONTAINER (box), combo);

    renderer = gtk_cell_renderer_pixbuf_new ();
    gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (combo), renderer, FALSE);
@@ -373,19 +367,16 @@ do_combobox (GtkWidget *do_widget)
    /* A combobox demonstrating trees.
     */
    frame = gtk_frame_new ("Where are we ?");
-    gtk_box_append (GTK_BOX (vbox), frame);
+    gtk_box_pack_start (GTK_BOX (vbox), frame);

    box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
-    gtk_widget_set_margin_start (box, 5);
-    gtk_widget_set_margin_end (box, 5);
-    gtk_widget_set_margin_top (box, 5);
-    gtk_widget_set_margin_bottom (box, 5);
-    gtk_frame_set_child (GTK_FRAME (frame), box);
+    g_object_set (box, "margin", 5, NULL);
+    gtk_container_add (GTK_CONTAINER (frame), box);

    model = create_capital_store ();
    combo = gtk_combo_box_new_with_model (model);
    g_object_unref (model);
-    gtk_box_append (GTK_BOX (box), combo);
+    gtk_container_add (GTK_CONTAINER (box), combo);

    renderer = gtk_cell_renderer_text_new ();
    gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (combo), renderer, TRUE);
@@ -404,52 +395,47 @@ do_combobox (GtkWidget *do_widget)

    /* A GtkComboBoxEntry with validation */
    frame = gtk_frame_new ("Editable");
-    gtk_box_append (GTK_BOX (vbox), frame);
+    gtk_box_pack_start (GTK_BOX (vbox), frame);

    box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
-    gtk_widget_set_margin_start (box, 5);
-    gtk_widget_set_margin_end (box, 5);
-    gtk_widget_set_margin_top (box, 5);
-    gtk_widget_set_margin_bottom (box, 5);
-    gtk_frame_set_child (GTK_FRAME (frame), box);
+    g_object_set (box, "margin", 5, NULL);
+    gtk_container_add (GTK_CONTAINER (frame), box);

    combo = gtk_combo_box_text_new_with_entry ();
    fill_combo_entry (combo);
-    gtk_box_append (GTK_BOX (box), combo);
+    gtk_container_add (GTK_CONTAINER (box), combo);

    entry = g_object_new (TYPE_MASK_ENTRY, NULL);
    MASK_ENTRY (entry)->mask = "^([0-9]*|One|Two|2\302\275|Three)$";

-    gtk_combo_box_set_child (GTK_COMBO_BOX (combo), entry);
+    gtk_container_remove (GTK_CONTAINER (combo), gtk_bin_get_child (GTK_BIN (combo)));
+    gtk_container_add (GTK_CONTAINER (combo), entry);

    /* A combobox with string IDs */
    frame = gtk_frame_new ("String IDs");
-    gtk_box_append (GTK_BOX (vbox), frame);
+    gtk_box_pack_start (GTK_BOX (vbox), frame);

    box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
-    gtk_widget_set_margin_start (box, 5);
-    gtk_widget_set_margin_end (box, 5);
-    gtk_widget_set_margin_top (box, 5);
-    gtk_widget_set_margin_bottom (box, 5);
-    gtk_frame_set_child (GTK_FRAME (frame), box);
+    g_object_set (box, "margin", 5, NULL);
+    gtk_container_add (GTK_CONTAINER (frame), box);

    combo = gtk_combo_box_text_new ();
    gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "never", "Not visible");
    gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "when-active", "Visible when active");
    gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "always", "Always visible");
-    gtk_box_append (GTK_BOX (box), combo);
+    gtk_container_add (GTK_CONTAINER (box), combo);

    entry = gtk_entry_new ();
    g_object_bind_property (combo, "active-id",
                            entry, "text",
                            G_BINDING_BIDIRECTIONAL);
-    gtk_box_append (GTK_BOX (box), entry);
+    gtk_container_add (GTK_CONTAINER (box), entry);
  }

  if (!gtk_widget_get_visible (window))
    gtk_widget_show (window);
  else
-    gtk_window_destroy (GTK_WINDOW (window));
+    gtk_widget_destroy (window);

  return window;
 }
--- a/demos/gtk-demo/constraints.c
+++ b/demos/gtk-demo/constraints.c
@@ -1,285 +0,0 @@
-/* Constraints/Simple Constraints
- * #Keywords: GtkLayoutManager
- *
- * GtkConstraintLayout provides a layout manager that uses relations
- * between widgets (also known as “constraints”) to compute the position
- * and size of each child.
- *
- * In addition to child widgets, the constraints can involve spacer
- * objects (also known as “guides”). This example has a guide between
- * the two buttons in the top row.
- *
- * Try resizing the window to see how the constraints react to update
- * the layout.
- */
-
-#include <glib/gi18n.h>
-#include <gtk/gtk.h>
-
-G_DECLARE_FINAL_TYPE (SimpleGrid, simple_grid, SIMPLE, GRID, GtkWidget)
-
-struct _SimpleGrid
-{
-  GtkWidget parent_instance;
-
-  GtkWidget *button1, *button2;
-  GtkWidget *button3;
-};
-
-G_DEFINE_TYPE (SimpleGrid, simple_grid, GTK_TYPE_WIDGET)
-
-static void
-simple_grid_dispose (GObject *object)
-{
-  SimpleGrid *self = SIMPLE_GRID (object);
-
-  g_clear_pointer (&self->button1, gtk_widget_unparent);
-  g_clear_pointer (&self->button2, gtk_widget_unparent);
-  g_clear_pointer (&self->button3, gtk_widget_unparent);
-
-  G_OBJECT_CLASS (simple_grid_parent_class)->dispose (object);
-}
-
-static void
-simple_grid_class_init (SimpleGridClass *klass)
-{
-  GObjectClass *object_class = G_OBJECT_CLASS (klass);
-  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
-
-  object_class->dispose = simple_grid_dispose;
-
-  gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_CONSTRAINT_LAYOUT);
-}
-
-/* Layout:
- *
- *   +-------------------------------------+
- *   | +-----------++-------++-----------+ |
- *   | |  Child 1  || Space ||  Child 2  | |
- *   | +-----------++-------++-----------+ |
- *   | +---------------------------------+ |
- *   | |             Child 3             | |
- *   | +---------------------------------+ |
- *   +-------------------------------------+
- *
- * Constraints:
- *
- *   super.start = child1.start - 8
- *   child1.width = child2.width
- *   child1.end = space.start
- *   space.end = child2.start
- *   child2.end = super.end - 8
- *   super.start = child3.start - 8
- *   child3.end = super.end - 8
- *   super.top = child1.top - 8
- *   super.top = child2.top - 8
- *   child1.bottom = child3.top - 12
- *   child2.bottom = child3.top - 12
- *   child3.height = child1.height
- *   child3.height = child2.height
- *   child3.bottom = super.bottom - 8
- *
- * To add some flexibility, we make the space
- * stretchable:
- *
- *   space.width >= 10
- *   space.width = 100
- *   space.width <= 200
- */
-static void
-build_constraints (SimpleGrid          *self,
-                   GtkConstraintLayout *manager)
-{
-  GtkConstraintGuide *guide;
-
-  guide = gtk_constraint_guide_new ();
-  gtk_constraint_guide_set_name (guide, "space");
-  gtk_constraint_guide_set_min_size (guide, 10, 10);
-  gtk_constraint_guide_set_nat_size (guide, 100, 10);
-  gtk_constraint_guide_set_max_size (guide, 200, 20);
-  gtk_constraint_guide_set_strength (guide, GTK_CONSTRAINT_STRENGTH_STRONG);
-  gtk_constraint_layout_add_guide (manager, guide);
-
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new_constant (GTK_CONSTRAINT_TARGET (self->button1),
-                        GTK_CONSTRAINT_ATTRIBUTE_WIDTH,
-                        GTK_CONSTRAINT_RELATION_LE,
-                        200.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (NULL,
-                        GTK_CONSTRAINT_ATTRIBUTE_START,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        self->button1,
-                        GTK_CONSTRAINT_ATTRIBUTE_START,
-                        1.0,
-                        -8.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (self->button1,
-                        GTK_CONSTRAINT_ATTRIBUTE_WIDTH,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        self->button2,
-                        GTK_CONSTRAINT_ATTRIBUTE_WIDTH,
-                        1.0,
-                        0.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (self->button1,
-                        GTK_CONSTRAINT_ATTRIBUTE_END,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        guide,
-                        GTK_CONSTRAINT_ATTRIBUTE_START,
-                        1.0,
-                        0.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (guide,
-                        GTK_CONSTRAINT_ATTRIBUTE_END,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        self->button2,
-                        GTK_CONSTRAINT_ATTRIBUTE_START,
-                        1.0,
-                        0.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (self->button2,
-                        GTK_CONSTRAINT_ATTRIBUTE_END,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        NULL,
-                        GTK_CONSTRAINT_ATTRIBUTE_END,
-                        1.0,
-                        -8.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (NULL,
-                        GTK_CONSTRAINT_ATTRIBUTE_START,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        self->button3,
-                        GTK_CONSTRAINT_ATTRIBUTE_START,
-                        1.0,
-                        -8.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (self->button3,
-                        GTK_CONSTRAINT_ATTRIBUTE_END,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        NULL,
-                        GTK_CONSTRAINT_ATTRIBUTE_END,
-                        1.0,
-                        -8.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (NULL,
-                        GTK_CONSTRAINT_ATTRIBUTE_TOP,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        self->button1,
-                        GTK_CONSTRAINT_ATTRIBUTE_TOP,
-                        1.0,
-                        -8.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (NULL,
-                        GTK_CONSTRAINT_ATTRIBUTE_TOP,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        self->button2,
-                        GTK_CONSTRAINT_ATTRIBUTE_TOP,
-                        1.0,
-                        -8.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (self->button1,
-                        GTK_CONSTRAINT_ATTRIBUTE_BOTTOM,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        self->button3,
-                        GTK_CONSTRAINT_ATTRIBUTE_TOP,
-                        1.0,
-                        -12.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (self->button2,
-                        GTK_CONSTRAINT_ATTRIBUTE_BOTTOM,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        self->button3,
-                        GTK_CONSTRAINT_ATTRIBUTE_TOP,
-                        1.0,
-                        -12.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (self->button3,
-                        GTK_CONSTRAINT_ATTRIBUTE_HEIGHT,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        self->button1,
-                        GTK_CONSTRAINT_ATTRIBUTE_HEIGHT,
-                        1.0,
-                        0.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (self->button3,
-                        GTK_CONSTRAINT_ATTRIBUTE_HEIGHT,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        self->button2,
-                        GTK_CONSTRAINT_ATTRIBUTE_HEIGHT,
-                        1.0,
-                        0.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (self->button3,
-                        GTK_CONSTRAINT_ATTRIBUTE_BOTTOM,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        NULL,
-                        GTK_CONSTRAINT_ATTRIBUTE_BOTTOM,
-                        1.0,
-                        -8.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-}
-
-static void
-simple_grid_init (SimpleGrid *self)
-{
-  GtkWidget *widget = GTK_WIDGET (self);
-
-  self->button1 = gtk_button_new_with_label ("Child 1");
-  gtk_widget_set_parent (self->button1, widget);
-
-  self->button2 = gtk_button_new_with_label ("Child 2");
-  gtk_widget_set_parent (self->button2, widget);
-
-  self->button3 = gtk_button_new_with_label ("Child 3");
-  gtk_widget_set_parent (self->button3, widget);
-
-  GtkLayoutManager *manager = gtk_widget_get_layout_manager (GTK_WIDGET (self));
-  build_constraints (self, GTK_CONSTRAINT_LAYOUT (manager));
-}
-
-GtkWidget *
-do_constraints (GtkWidget *do_widget)
-{
- static GtkWidget *window;
-
- if (!window)
-   {
-     GtkWidget *box, *grid;
-
-     window = gtk_window_new ();
-     gtk_window_set_display (GTK_WINDOW (window), gtk_widget_get_display (do_widget));
-     gtk_window_set_title (GTK_WINDOW (window), "Simple Constraints");
-     gtk_window_set_default_size (GTK_WINDOW (window), 260, -1);
-     g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
-
-     box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
-     gtk_window_set_child (GTK_WINDOW (window), box);
-
-     grid = g_object_new (simple_grid_get_type (), NULL);
-     gtk_widget_set_hexpand (grid, TRUE);
-     gtk_widget_set_vexpand (grid, TRUE);
-     gtk_box_append (GTK_BOX (box), grid);
-   }
-
- if (!gtk_widget_get_visible (window))
-   gtk_widget_show (window);
- else
-   gtk_window_destroy (GTK_WINDOW (window));
-
- return window;
-}
--- a/demos/gtk-demo/constraints_builder.c
+++ b/demos/gtk-demo/constraints_builder.c
@@ -1,74 +0,0 @@
-/* Constraints/Builder
- *
- * GtkConstraintLayouts can be created in .ui files, and constraints can
- * be set up at that time as well, as this example demonstrates. It shows
- * various ways to do spacing and sizing with constraints.
- *
- * Make the window wider to see the rows react differently
- */
-
-#include <glib/gi18n.h>
-#include <gtk/gtk.h>
-
-G_DECLARE_FINAL_TYPE (ConstraintsGrid, constraints_grid, CONSTRAINTS, GRID, GtkWidget)
-
-struct _ConstraintsGrid
-{
-  GtkWidget parent_instance;
-};
-
-G_DEFINE_TYPE (ConstraintsGrid, constraints_grid, GTK_TYPE_WIDGET)
-
-static void
-constraints_grid_init (ConstraintsGrid *grid)
-{
-}
-
-static void
-constraints_grid_dispose (GObject *object)
-{
-  GtkWidget *widget = GTK_WIDGET (object);
-  GtkWidget *child;
-
-  while ((child = gtk_widget_get_first_child (widget)))
-    gtk_widget_unparent (child);
-
-  G_OBJECT_CLASS (constraints_grid_parent_class)->dispose (object);
-}
-
-static void
-constraints_grid_class_init (ConstraintsGridClass *klass)
-{
-  GObjectClass *object_class = G_OBJECT_CLASS (klass);
-
-  object_class->dispose = constraints_grid_dispose;
-}
-
-GtkWidget *
-do_constraints_builder (GtkWidget *do_widget)
-{
- static GtkWidget *window;
-
- if (!window)
-   {
-     GtkBuilder *builder;
-
-     g_type_ensure (constraints_grid_get_type ());
-
-     builder = gtk_builder_new_from_resource ("/constraints_builder/constraints_builder.ui");
-
-     window = GTK_WIDGET (gtk_builder_get_object (builder, "window1"));
-     gtk_window_set_display (GTK_WINDOW (window),
-                             gtk_widget_get_display (do_widget));
-     g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
-
-     g_object_unref (builder);
-   }
-
- if (!gtk_widget_get_visible (window))
-   gtk_widget_show (window);
- else
-   gtk_window_destroy (GTK_WINDOW (window));
-
- return window;
-}
--- a/demos/gtk-demo/constraints_builder.ui
+++ b/demos/gtk-demo/constraints_builder.ui
@@ -1,460 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<interface>
-  <object class="GtkWindow" id="window1">
-    <property name="title" translatable="yes">Constraints — Builder</property>
-    <property name="default-width">260</property>
-    <child>
-      <object class="ConstraintsGrid">
-        <property name="halign">fill</property>
-        <property name="valign">fill</property>
-        <property name="margin-top">10</property>
-        <property name="margin-bottom">10</property>
-        <property name="margin-start">10</property>
-        <property name="margin-end">10</property>
-        <property name="layout-manager">
-          <object class="GtkConstraintLayout">
-            <constraints>
-              <guide name="guide1" min-width="10" nat-width="200" strength="weak"/>
-              <guide name="guide2" min-width="10" nat-width="200" strength="weak"/>
-              <guide name="guide3" min-width="10" nat-width="200" strength="weak"/>
-              <guide name="guide4" min-width="10" nat-width="200" strength="weak"/>
-              <guide name="guide5" min-width="10" nat-width="200" strength="weak"/>
-              <guide name="guide6" min-width="10" nat-width="200" strength="weak"/>
-              <guide name="guide7" min-width="10" nat-width="200" strength="weak"/>
-              <guide name="guide8" min-width="10" nat-width="200" strength="weak"/>
-              <guide name="guide9" min-width="0" nat-width="200" strength="weak"/>
-              <guide name="guide10" min-width="0" nat-width="200" strength="weak"/>
-              <guide name="barrier1" min-height="10"/>
-              <guide name="barrier2" min-height="10"/>
-              <guide name="barrier3" min-height="10"/>
-              <guide name="barrier4" min-height="10"/>
-
-              <!-- Spread Chain -->
-              <constraint target="super" target-attribute="top"
-                          relation="eq"
-                          source="button1" source-attribute="top"
-                          strength="required"/>
-              <constraint target="super" target-attribute="top"
-                          relation="eq"
-                          source="button2" source-attribute="top"
-                          strength="required"/>
-              <constraint target="super" target-attribute="top"
-                          relation="eq"
-                          source="button3" source-attribute="top"
-                          strength="required"/>
-
-              <constraint target="super" target-attribute="left"
-                          relation="eq"
-                          source="guide1" source-attribute="left"
-                          strength="required"/>
-              <constraint target="button1" target-attribute="left"
-                          relation="eq"
-                          source="guide1" source-attribute="right"
-                          strength="required"/>
-              <constraint target="guide2" target-attribute="left"
-                          relation="eq"
-                          source="button1" source-attribute="right"
-                          strength="required"/>
-              <constraint target="button2" target-attribute="left"
-                          relation="eq"
-                          source="guide2" source-attribute="right"
-                          strength="required"/>
-              <constraint target="guide3" target-attribute="left"
-                          relation="eq"
-                          source="button2" source-attribute="right"
-                          strength="required"/>
-              <constraint target="button3" target-attribute="left"
-                          relation="eq"
-                          source="guide3" source-attribute="right"
-                          strength="required"/>
-              <constraint target="guide4" target-attribute="left"
-                          relation="eq"
-                          source="button3" source-attribute="right"
-                          strength="required"/>
-              <constraint target="super" target-attribute="right"
-                          relation="eq"
-                          source="guide4" source-attribute="right"
-                          strength="required"/>
-
-              <constraint target="guide1" target-attribute="width"
-                          relation="eq"
-                          source="guide2" source-attribute="width"
-                          strength="required"/>
-              <constraint target="guide2" target-attribute="width"
-                          relation="eq"
-                          source="guide3" source-attribute="width"
-                          strength="required"/>
-              <constraint target="guide3" target-attribute="width"
-                          relation="eq"
-                          source="guide4" source-attribute="width"
-                          strength="required"/>
-
-              <constraint target="button1" target-attribute="width"
-                          relation="eq"
-                          source="button2" source-attribute="width"
-                          strength="required"/>
-              <constraint target="button2" target-attribute="width"
-                          relation="eq"
-                          source="button3" source-attribute="width"
-                          strength="required"/>
-
-              <constraint target="button1" target-attribute="bottom"
-                          relation="eq"
-                          source="barrier1" source-attribute="top"
-                          strength="required"/>
-              <constraint target="button2" target-attribute="bottom"
-                          relation="eq"
-                          source="barrier1" source-attribute="top"
-                          strength="required"/>
-              <constraint target="button3" target-attribute="bottom"
-                          relation="eq"
-                          source="barrier1" source-attribute="top"
-                          strength="required"/>
-
-              <!-- Spread Inside Chain -->
-
-              <constraint target="super" target-attribute="left"
-                          relation="eq"
-                          source="button4" source-attribute="left"
-                          strength="required"/>
-              <constraint target="guide5" target-attribute="left"
-                          relation="eq"
-                          source="button4" source-attribute="right"
-                          strength="required"/>
-              <constraint target="button5" target-attribute="left"
-                          relation="eq"
-                          source="guide5" source-attribute="right"
-                          strength="required"/>
-              <constraint target="guide6" target-attribute="left"
-                          relation="eq"
-                          source="button5" source-attribute="right"
-                          strength="required"/>
-              <constraint target="button6" target-attribute="left"
-                          relation="eq"
-                          source="guide6" source-attribute="right"
-                          strength="required"/>
-              <constraint target="super" target-attribute="right"
-                          relation="eq"
-                          source="button6" source-attribute="right"
-                          strength="required"/>
-
-              <constraint target="guide5" target-attribute="width"
-                          relation="eq"
-                          source="guide6" source-attribute="width"
-                          strength="required"/>
-
-              <constraint target="button4" target-attribute="width"
-                          relation="eq"
-                          source="button5" source-attribute="width"
-                          strength="required"/>
-              <constraint target="button5" target-attribute="width"
-                          relation="eq"
-                          source="button6" source-attribute="width"
-                          strength="required"/>
-
-              <constraint target="button4" target-attribute="top"
-                          relation="eq"
-                          source="barrier1" source-attribute="bottom"
-                          strength="required"/>
-              <constraint target="button5" target-attribute="top"
-                          relation="eq"
-                          source="barrier1" source-attribute="bottom"
-                          strength="required"/>
-              <constraint target="button6" target-attribute="top"
-                          relation="eq"
-                          source="barrier1" source-attribute="bottom"
-                          strength="required"/>
-
-              <constraint target="button4" target-attribute="bottom"
-                          relation="eq"
-                          source="barrier2" source-attribute="top"
-                          strength="required"/>
-              <constraint target="button5" target-attribute="bottom"
-                          relation="eq"
-                          source="barrier2" source-attribute="top"
-                          strength="required"/>
-              <constraint target="button6" target-attribute="bottom"
-                          relation="eq"
-                          source="barrier2" source-attribute="top"
-                          strength="required"/>
-
-              <!-- Weighted Chain -->
-
-              <constraint target="super" target-attribute="left"
-                          relation="eq"
-                          source="button7" source-attribute="left"
-                          strength="required"/>
-              <constraint target="button8" target-attribute="left"
-                          relation="eq"
-                          source="button7" source-attribute="right"
-                          constant="10"
-                          strength="required"/>
-              <constraint target="button9" target-attribute="left"
-                          relation="eq"
-                          source="button8" source-attribute="right"
-                          constant="10"
-                          strength="required"/>
-              <constraint target="super" target-attribute="right"
-                          relation="eq"
-                          source="button9" source-attribute="right"
-                          strength="required"/>
-
-              <constraint target="button8" target-attribute="width"
-                          relation="eq"
-                          source="button7" source-attribute="width"
-                          multiplier="2"
-                          strength="required"/>
-              <constraint target="button9" target-attribute="width"
-                          relation="eq"
-                          source="button7" source-attribute="width"
-                          multiplier="3"
-                          strength="required"/>
-
-              <constraint target="button7" target-attribute="top"
-                          relation="eq"
-                          source="barrier2" source-attribute="bottom"
-                          strength="required"/>
-              <constraint target="button8" target-attribute="top"
-                          relation="eq"
-                          source="barrier2" source-attribute="bottom"
-                          strength="required"/>
-              <constraint target="button9" target-attribute="top"
-                          relation="eq"
-                          source="barrier2" source-attribute="bottom"
-                          strength="required"/>
-
-              <constraint target="button7" target-attribute="bottom"
-                          relation="eq"
-                          source="barrier3" source-attribute="top"
-                          strength="required"/>
-              <constraint target="button8" target-attribute="bottom"
-                          relation="eq"
-                          source="barrier3" source-attribute="top"
-                          strength="required"/>
-              <constraint target="button9" target-attribute="bottom"
-                          relation="eq"
-                          source="barrier3" source-attribute="top"
-                          strength="required"/>
-
-              <!-- Packed Chain -->
-
-              <constraint target="super" target-attribute="left"
-                          relation="eq"
-                          source="guide7" source-attribute="left"
-                          strength="required"/>
-              <constraint target="button10" target-attribute="left"
-                          relation="eq"
-                          source="guide7" source-attribute="right"
-                          strength="required"/>
-              <constraint target="button11" target-attribute="left"
-                          relation="eq"
-                          source="button10" source-attribute="right"
-                          constant="10"
-                          strength="required"/>
-              <constraint target="button12" target-attribute="left"
-                          relation="eq"
-                          source="button11" source-attribute="right"
-                          constant="10"
-                          strength="required"/>
-              <constraint target="guide8" target-attribute="left"
-                          relation="eq"
-                          source="button12" source-attribute="right"
-                          strength="required"/>
-              <constraint target="super" target-attribute="right"
-                          relation="eq"
-                          source="guide8" source-attribute="right"
-                          strength="required"/>
-
-              <constraint target="guide7" target-attribute="width"
-                          relation="eq"
-                          source="guide8" source-attribute="width"
-                          strength="required"/>
-
-              <constraint target="button10" target-attribute="width"
-                          relation="eq"
-                          source="button11" source-attribute="width"
-                          strength="required"/>
-              <constraint target="button11" target-attribute="width"
-                          relation="eq"
-                          source="button12" source-attribute="width"
-                          strength="required"/>
-
-              <constraint target="button10" target-attribute="top"
-                          relation="eq"
-                          source="barrier3" source-attribute="bottom"
-                          strength="required"/>
-              <constraint target="button11" target-attribute="top"
-                          relation="eq"
-                          source="barrier3" source-attribute="bottom"
-                          strength="required"/>
-              <constraint target="button12" target-attribute="top"
-                          relation="eq"
-                          source="barrier3" source-attribute="bottom"
-                          strength="required"/>
-
-              <constraint target="button10" target-attribute="bottom"
-                          relation="eq"
-                          source="barrier4" source-attribute="top"
-                          strength="required"/>
-              <constraint target="button11" target-attribute="bottom"
-                          relation="eq"
-                          source="barrier4" source-attribute="top"
-                          strength="required"/>
-              <constraint target="button12" target-attribute="bottom"
-                          relation="eq"
-                          source="barrier4" source-attribute="top"
-                          strength="required"/>
-
-              <!-- Packed Chain with Bias -->
-
-              <constraint target="super" target-attribute="left"
-                          relation="eq"
-                          source="guide9" source-attribute="left"
-                          strength="required"/>
-              <constraint target="button13" target-attribute="left"
-                          relation="eq"
-                          source="guide9" source-attribute="right"
-                          constant="10"
-                          strength="required"/>
-              <constraint target="button14" target-attribute="left"
-                          relation="eq"
-                          source="button13" source-attribute="right"
-                          constant="10"
-                          strength="required"/>
-              <constraint target="button15" target-attribute="left"
-                          relation="eq"
-                          source="button14" source-attribute="right"
-                          constant="10"
-                          strength="required"/>
-              <constraint target="guide10" target-attribute="left"
-                          relation="eq"
-                          source="button15" source-attribute="right"
-                          constant="10"
-                          strength="required"/>
-              <constraint target="super" target-attribute="right"
-                          relation="eq"
-                          source="guide10" source-attribute="right"
-                          strength="required"/>
-
-              <constraint target="guide9" target-attribute="width"
-                          relation="eq"
-                          source="guide10" source-attribute="width"
-                          multiplier="4"
-                          strength="required"/>
-
-              <constraint target="button13" target-attribute="width"
-                          relation="eq"
-                          source="button14" source-attribute="width"
-                          strength="required"/>
-              <constraint target="button14" target-attribute="width"
-                          relation="eq"
-                          source="button15" source-attribute="width"
-                          strength="required"/>
-
-              <constraint target="button13" target-attribute="top"
-                          relation="eq"
-                          source="barrier4" source-attribute="bottom"
-                          strength="required"/>
-              <constraint target="button14" target-attribute="top"
-                          relation="eq"
-                          source="barrier4" source-attribute="bottom"
-                          strength="required"/>
-              <constraint target="button15" target-attribute="top"
-                          relation="eq"
-                          source="barrier4" source-attribute="bottom"
-                          strength="required"/>
-
-              <constraint target="super" target-attribute="bottom"
-                          relation="ge"
-                          source="button13" source-attribute="bottom"
-                          strength="required"/>
-              <constraint target="super" target-attribute="bottom"
-                          relation="ge"
-                          source="button14" source-attribute="bottom"
-                          strength="required"/>
-              <constraint target="super" target-attribute="bottom"
-                          relation="ge"
-                          source="button15" source-attribute="bottom"
-                          strength="required"/>
-            </constraints>
-          </object>
-        </property>
-        <child>
-          <object class="GtkButton" id="button1">
-            <property name="label">A</property>
-          </object>
-        </child>
-        <child>
-          <object class="GtkButton" id="button2">
-            <property name="label">B</property>
-          </object>
-        </child>
-        <child>
-          <object class="GtkButton" id="button3">
-            <property name="label">C</property>
-          </object>
-        </child>
-        <child>
-          <object class="GtkButton" id="button4">
-            <property name="label">A</property>
-          </object>
-        </child>
-        <child>
-          <object class="GtkButton" id="button5">
-            <property name="label">B</property>
-          </object>
-        </child>
-        <child>
-          <object class="GtkButton" id="button6">
-            <property name="label">C</property>
-          </object>
-        </child>
-        <child>
-          <object class="GtkButton" id="button7">
-            <property name="label">A</property>
-          </object>
-        </child>
-        <child>
-          <object class="GtkButton" id="button8">
-            <property name="label">B</property>
-          </object>
-        </child>
-        <child>
-          <object class="GtkButton" id="button9">
-            <property name="label">C</property>
-          </object>
-        </child>
-        <child>
-          <object class="GtkButton" id="button10">
-            <property name="label">A</property>
-          </object>
-        </child>
-        <child>
-          <object class="GtkButton" id="button11">
-            <property name="label">B</property>
-          </object>
-        </child>
-        <child>
-          <object class="GtkButton" id="button12">
-            <property name="label">C</property>
-          </object>
-        </child>
-        <child>
-          <object class="GtkButton" id="button13">
-            <property name="label">A</property>
-          </object>
-        </child>
-        <child>
-          <object class="GtkButton" id="button14">
-            <property name="label">B</property>
-          </object>
-        </child>
-        <child>
-          <object class="GtkButton" id="button15">
-            <property name="label">C</property>
-          </object>
-        </child>
-      </object>
-    </child>
-  </object>
-</interface>
--- a/demos/gtk-demo/constraints_interactive.c
+++ b/demos/gtk-demo/constraints_interactive.c
@@ -1,237 +0,0 @@
-/* Constraints/Interactive Constraints
- * #Keywords: GtkConstraintLayout
- *
- * This example shows how constraints can be updated during user interaction.
- * The vertical edge between the buttons can be dragged with the mouse.
- */
-
-#include <glib/gi18n.h>
-#include <gtk/gtk.h>
-
-G_DECLARE_FINAL_TYPE (InteractiveGrid, interactive_grid, INTERACTIVE, GRID, GtkWidget)
-
-struct _InteractiveGrid
-{
-  GtkWidget parent_instance;
-
-  GtkWidget *button1, *button2;
-  GtkWidget *button3;
-  GtkConstraintGuide *guide;
-  GtkConstraint *constraint;
-};
-
-G_DEFINE_TYPE (InteractiveGrid, interactive_grid, GTK_TYPE_WIDGET)
-
-static void
-interactive_grid_dispose (GObject *object)
-{
-  InteractiveGrid *self = INTERACTIVE_GRID (object);
-
-  g_clear_pointer (&self->button1, gtk_widget_unparent);
-  g_clear_pointer (&self->button2, gtk_widget_unparent);
-  g_clear_pointer (&self->button3, gtk_widget_unparent);
-
-  G_OBJECT_CLASS (interactive_grid_parent_class)->dispose (object);
-}
-
-static void
-interactive_grid_class_init (InteractiveGridClass *klass)
-{
-  GObjectClass *object_class = G_OBJECT_CLASS (klass);
-  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
-
-  object_class->dispose = interactive_grid_dispose;
-
-  gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_CONSTRAINT_LAYOUT);
-}
-
-static void
-build_constraints (InteractiveGrid          *self,
-                   GtkConstraintLayout *manager)
-{
-  self->guide = g_object_new (GTK_TYPE_CONSTRAINT_GUIDE, NULL);
-  gtk_constraint_layout_add_guide (manager, self->guide);
-
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new_constant (GTK_CONSTRAINT_TARGET (self->guide),
-                        GTK_CONSTRAINT_ATTRIBUTE_WIDTH,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        0.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (NULL,
-                        GTK_CONSTRAINT_ATTRIBUTE_START,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        GTK_CONSTRAINT_TARGET (self->button1),
-                        GTK_CONSTRAINT_ATTRIBUTE_START,
-                        1.0,
-                        -8.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (GTK_CONSTRAINT_TARGET (self->button1),
-                        GTK_CONSTRAINT_ATTRIBUTE_END,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        GTK_CONSTRAINT_TARGET (self->guide),
-                        GTK_CONSTRAINT_ATTRIBUTE_START,
-                        1.0,
-                        0.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (GTK_CONSTRAINT_TARGET (self->button2),
-                        GTK_CONSTRAINT_ATTRIBUTE_START,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        GTK_CONSTRAINT_TARGET (self->guide),
-                        GTK_CONSTRAINT_ATTRIBUTE_END,
-                        1.0,
-                        0.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (GTK_CONSTRAINT_TARGET (self->button2),
-                        GTK_CONSTRAINT_ATTRIBUTE_END,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        NULL,
-                        GTK_CONSTRAINT_ATTRIBUTE_END,
-                        1.0,
-                        -8.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (NULL,
-                        GTK_CONSTRAINT_ATTRIBUTE_START,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        GTK_CONSTRAINT_TARGET (self->button3),
-                        GTK_CONSTRAINT_ATTRIBUTE_START,
-                        1.0,
-                        -8.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (GTK_CONSTRAINT_TARGET (self->button3),
-                        GTK_CONSTRAINT_ATTRIBUTE_END,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        GTK_CONSTRAINT_TARGET (self->guide),
-                        GTK_CONSTRAINT_ATTRIBUTE_START,
-                        1.0,
-                        0.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (NULL,
-                        GTK_CONSTRAINT_ATTRIBUTE_TOP,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        GTK_CONSTRAINT_TARGET (self->button1),
-                        GTK_CONSTRAINT_ATTRIBUTE_TOP,
-                        1.0,
-                        -8.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (GTK_CONSTRAINT_TARGET (self->button2),
-                        GTK_CONSTRAINT_ATTRIBUTE_TOP,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        GTK_CONSTRAINT_TARGET (self->button1),
-                        GTK_CONSTRAINT_ATTRIBUTE_BOTTOM,
-                        1.0,
-                        0.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (GTK_CONSTRAINT_TARGET (self->button3),
-                        GTK_CONSTRAINT_ATTRIBUTE_TOP,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        GTK_CONSTRAINT_TARGET (self->button2),
-                        GTK_CONSTRAINT_ATTRIBUTE_BOTTOM,
-                        1.0,
-                        0.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-  gtk_constraint_layout_add_constraint (manager,
-    gtk_constraint_new (GTK_CONSTRAINT_TARGET (self->button3),
-                        GTK_CONSTRAINT_ATTRIBUTE_BOTTOM,
-                        GTK_CONSTRAINT_RELATION_EQ,
-                        NULL,
-                        GTK_CONSTRAINT_ATTRIBUTE_BOTTOM,
-                        1.0,
-                        -8.0,
-                        GTK_CONSTRAINT_STRENGTH_REQUIRED));
-}
-
-static void
-drag_cb (GtkGestureDrag  *drag,
-         double           offset_x,
-         double           offset_y,
-         InteractiveGrid *self)
-{
-  GtkConstraintLayout *layout = GTK_CONSTRAINT_LAYOUT (gtk_widget_get_layout_manager (GTK_WIDGET (self)));
-  double x, y;
-
-  if (self->constraint)
-    {
-      gtk_constraint_layout_remove_constraint (layout, self->constraint);
-      g_clear_object (&self->constraint);
-    }
-
-  gtk_gesture_drag_get_start_point (drag, &x, &y);
-  self->constraint = gtk_constraint_new_constant (GTK_CONSTRAINT_TARGET (self->guide),
-                                                  GTK_CONSTRAINT_ATTRIBUTE_LEFT,
-                                                  GTK_CONSTRAINT_RELATION_EQ,
-                                                  x + offset_x,
-                                                  GTK_CONSTRAINT_STRENGTH_REQUIRED);
-  gtk_constraint_layout_add_constraint (layout, g_object_ref (self->constraint));
-  gtk_widget_queue_allocate (GTK_WIDGET (self));
-}
-
-static void
-interactive_grid_init (InteractiveGrid *self)
-{
-  GtkWidget *widget = GTK_WIDGET (self);
-  GtkGesture *drag;
-
-  self->button1 = gtk_button_new_with_label ("Child 1");
-  gtk_widget_set_parent (self->button1, widget);
-  gtk_widget_set_name (self->button1, "button1");
-
-  self->button2 = gtk_button_new_with_label ("Child 2");
-  gtk_widget_set_parent (self->button2, widget);
-  gtk_widget_set_name (self->button2, "button2");
-
-  self->button3 = gtk_button_new_with_label ("Child 3");
-  gtk_widget_set_parent (self->button3, widget);
-  gtk_widget_set_name (self->button3, "button3");
-
-  GtkLayoutManager *manager = gtk_widget_get_layout_manager (GTK_WIDGET (self));
-  build_constraints (self, GTK_CONSTRAINT_LAYOUT (manager));
-
-  drag = gtk_gesture_drag_new ();
-  g_signal_connect (drag, "drag-update", G_CALLBACK (drag_cb), self);
-  gtk_widget_add_controller (GTK_WIDGET (self), GTK_EVENT_CONTROLLER (drag));
-}
-
-GtkWidget *
-do_constraints_interactive (GtkWidget *do_widget)
-{
- static GtkWidget *window;
-
- if (!window)
-   {
-     GtkWidget *box, *grid;
-
-     window = gtk_window_new ();
-     gtk_window_set_display (GTK_WINDOW (window), gtk_widget_get_display (do_widget));
-     gtk_window_set_title (GTK_WINDOW (window), "Interactive Constraints");
-     gtk_window_set_default_size (GTK_WINDOW (window), 260, -1);
-     g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
-
-     box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
-     gtk_window_set_child (GTK_WINDOW (window), box);
-
-     grid = g_object_new (interactive_grid_get_type (), NULL);
-     gtk_widget_set_hexpand (grid, TRUE);
-     gtk_widget_set_vexpand (grid, TRUE);
-     gtk_box_append (GTK_BOX (box), grid);
-   }
-
- if (!gtk_widget_get_visible (window))
-   gtk_widget_show (window);
- else
-   gtk_window_destroy (GTK_WINDOW (window));
-
- return window;
-}
--- a/demos/gtk-demo/constraints_vfl.c
+++ b/demos/gtk-demo/constraints_vfl.c
@@ -1,160 +0,0 @@
-/* Constraints/VFL
- *
- * GtkConstraintLayout allows defining constraints using a
- * compact syntax called Visual Format Language, or VFL.
- *
- * A typical example of a VFL specification looks like this:
- *
- * H:|-[button1(==button2)]-12-[button2]-|
- */
-
-#include <glib/gi18n.h>
-#include <gtk/gtk.h>
-
-G_DECLARE_FINAL_TYPE (VflGrid, vfl_grid, VFL, GRID, GtkWidget)
-
-struct _VflGrid
-{
-  GtkWidget parent_instance;
-
-  GtkWidget *button1, *button2;
-  GtkWidget *button3;
-};
-
-G_DEFINE_TYPE (VflGrid, vfl_grid, GTK_TYPE_WIDGET)
-
-static void
-vfl_grid_dispose (GObject *object)
-{
-  VflGrid *self = VFL_GRID (object);
-
-  g_clear_pointer (&self->button1, gtk_widget_unparent);
-  g_clear_pointer (&self->button2, gtk_widget_unparent);
-  g_clear_pointer (&self->button3, gtk_widget_unparent);
-
-  G_OBJECT_CLASS (vfl_grid_parent_class)->dispose (object);
-}
-
-static void
-vfl_grid_class_init (VflGridClass *klass)
-{
-  GObjectClass *object_class = G_OBJECT_CLASS (klass);
-  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
-
-  object_class->dispose = vfl_grid_dispose;
-
-  gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_CONSTRAINT_LAYOUT);
-}
-
-/* Layout:
- *
- *   +-----------------------------+
- *   | +-----------+ +-----------+ |
- *   | |  Child 1  | |  Child 2  | |
- *   | +-----------+ +-----------+ |
- *   | +-------------------------+ |
- *   | |         Child 3         | |
- *   | +-------------------------+ |
- *   +-----------------------------+
- *
- * Constraints:
- *
- *   super.start = child1.start - 8
- *   child1.width = child2.width
- *   child1.end = child2.start - 12
- *   child2.end = super.end - 8
- *   super.start = child3.start - 8
- *   child3.end = super.end - 8
- *   super.top = child1.top - 8
- *   super.top = child2.top - 8
- *   child1.bottom = child3.top - 12
- *   child2.bottom = child3.top - 12
- *   child3.height = child1.height
- *   child3.height = child2.height
- *   child3.bottom = super.bottom - 8
- *
- * Visual format:
- *
- *   H:|-8-[view1(==view2)-12-[view2]-8-|
- *   H:|-8-[view3]-8-|
- *   V:|-8-[view1]-12-[view3(==view1)]-8-|
- *   V:|-8-[view2]-12-[view3(==view2)]-8-|
- */
-static void
-build_constraints (VflGrid          *self,
-                   GtkConstraintLayout *manager)
-{
-  const char * const vfl[] = {
-    "H:|-[button1(==button2)]-12-[button2]-|",
-    "H:|-[button3]-|",
-    "V:|-[button1]-12-[button3(==button1)]-|",
-    "V:|-[button2]-12-[button3(==button2)]-|",
-  };
-  GError *error = NULL;
-
-  gtk_constraint_layout_add_constraints_from_description (manager, vfl, G_N_ELEMENTS (vfl),
-                                                          8, 8,
-                                                          &error,
-                                                          "button1", self->button1,
-                                                          "button2", self->button2,
-                                                          "button3", self->button3,
-                                                          NULL);
-  if (error != NULL)
-    {
-      g_printerr ("VFL parsing error:\n%s", error->message);
-      g_error_free (error);
-    }
-}
-
-static void
-vfl_grid_init (VflGrid *self)
-{
-  GtkWidget *widget = GTK_WIDGET (self);
-
-  self->button1 = gtk_button_new_with_label ("Child 1");
-  gtk_widget_set_parent (self->button1, widget);
-  gtk_widget_set_name (self->button1, "button1");
-
-  self->button2 = gtk_button_new_with_label ("Child 2");
-  gtk_widget_set_parent (self->button2, widget);
-  gtk_widget_set_name (self->button2, "button2");
-
-  self->button3 = gtk_button_new_with_label ("Child 3");
-  gtk_widget_set_parent (self->button3, widget);
-  gtk_widget_set_name (self->button3, "button3");
-
-  GtkLayoutManager *manager = gtk_widget_get_layout_manager (GTK_WIDGET (self));
-  build_constraints (self, GTK_CONSTRAINT_LAYOUT (manager));
-}
-
-GtkWidget *
-do_constraints_vfl (GtkWidget *do_widget)
-{
- static GtkWidget *window;
-
- if (!window)
-   {
-     GtkWidget *box, *grid;
-
-     window = gtk_window_new ();
-     gtk_window_set_display (GTK_WINDOW (window), gtk_widget_get_display (do_widget));
-     gtk_window_set_title (GTK_WINDOW (window), "Constraints — VFL");
-     gtk_window_set_default_size (GTK_WINDOW (window), 260, -1);
-     g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
-
-     box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
-     gtk_window_set_child (GTK_WINDOW (window), box);
-
-     grid = g_object_new (vfl_grid_get_type (), NULL);
-     gtk_widget_set_hexpand (grid, TRUE);
-     gtk_widget_set_vexpand (grid, TRUE);
-     gtk_box_append (GTK_BOX (box), grid);
-   }
-
- if (!gtk_widget_get_visible (window))
-   gtk_widget_show (window);
- else
-   gtk_window_destroy (GTK_WINDOW (window));
-
- return window;
-}
--- a/demos/gtk-demo/crosswarp.glsl
+++ b/demos/gtk-demo/crosswarp.glsl
@@ -1,27 +0,0 @@
-uniform float progress;
-uniform sampler2D u_texture1;
-uniform sampler2D u_texture2;
-
-vec4 getFromColor (vec2 uv) {
-  return GskTexture(u_texture1, uv);
-}
-
-vec4 getToColor (vec2 uv) {
-  return GskTexture(u_texture2, uv);
-}
-
-// Source: https://gl-transitions.com/editor/crosswarp
-// Author: Eke Péter <peterekepeter@gmail.com>
-// License: MIT
-
-vec4 transition(vec2 p) {
-  float x = progress;
-  x=smoothstep(.0,1.0,(x*2.0+p.x-1.0));
-  return mix(getFromColor((p-.5)*(1.-x)+.5), getToColor((p-.5)*x+.5), x);
-}
-
-
-void mainImage(out vec4 fragColor, in vec2 fragCoord, in vec2 resolution, in vec2 uv)
-{
-  fragColor = transition(uv);
-}
--- a/demos/gtk-demo/css_accordion.c
+++ b/demos/gtk-demo/css_accordion.c
@@ -1,6 +1,7 @@
 /* Theming/CSS Accordion
 *
 * A simple accordion demo written using CSS transitions and multiple backgrounds
+ *
 */

 #include <gtk/gtk.h>
@@ -8,13 +9,9 @@
 static void
 apply_css (GtkWidget *widget, GtkStyleProvider *provider)
 {
-  GtkWidget *child;
-
  gtk_style_context_add_provider (gtk_widget_get_style_context (widget), provider, G_MAXUINT);
-  for (child = gtk_widget_get_first_child (widget);
-       child != NULL;
-       child = gtk_widget_get_next_sibling (child))
-    apply_css (child, provider);
+  if (GTK_IS_CONTAINER (widget))
+    gtk_container_forall (GTK_CONTAINER (widget), (GtkCallback) apply_css, provider);
 }

 GtkWidget *
@@ -27,34 +24,35 @@ do_css_accordion (GtkWidget *do_widget)
      GtkWidget *container, *child;
      GtkStyleProvider *provider;

-      window = gtk_window_new ();
+      window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
      gtk_window_set_title (GTK_WINDOW (window), "CSS Accordion");
      gtk_window_set_transient_for (GTK_WINDOW (window), GTK_WINDOW (do_widget));
      gtk_window_set_default_size (GTK_WINDOW (window), 600, 300);
-      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
+      g_signal_connect (window, "destroy",
+                        G_CALLBACK (gtk_widget_destroyed), &window);

      container = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
      gtk_widget_set_halign (container, GTK_ALIGN_CENTER);
      gtk_widget_set_valign (container, GTK_ALIGN_CENTER);
-      gtk_window_set_child (GTK_WINDOW (window), container);
+      gtk_container_add (GTK_CONTAINER (window), container);

      child = gtk_button_new_with_label ("This");
-      gtk_box_append (GTK_BOX (container), child);
+      gtk_container_add (GTK_CONTAINER (container), child);

      child = gtk_button_new_with_label ("Is");
-      gtk_box_append (GTK_BOX (container), child);
+      gtk_container_add (GTK_CONTAINER (container), child);

      child = gtk_button_new_with_label ("A");
-      gtk_box_append (GTK_BOX (container), child);
+      gtk_container_add (GTK_CONTAINER (container), child);

      child = gtk_button_new_with_label ("CSS");
-      gtk_box_append (GTK_BOX (container), child);
+      gtk_container_add (GTK_CONTAINER (container), child);

      child = gtk_button_new_with_label ("Accordion");
-      gtk_box_append (GTK_BOX (container), child);
+      gtk_container_add (GTK_CONTAINER (container), child);

      child = gtk_button_new_with_label (":-)");
-      gtk_box_append (GTK_BOX (container), child);
+      gtk_container_add (GTK_CONTAINER (container), child);

      provider = GTK_STYLE_PROVIDER (gtk_css_provider_new ());
      gtk_css_provider_load_from_resource (GTK_CSS_PROVIDER (provider), "/css_accordion/css_accordion.css");
@@ -65,7 +63,7 @@ do_css_accordion (GtkWidget *do_widget)
  if (!gtk_widget_get_visible (window))
    gtk_widget_show (window);
  else
-    gtk_window_destroy (GTK_WINDOW (window));
+    gtk_widget_destroy (window);

  return window;
 }
--- a/demos/gtk-demo/css_basics.c
+++ b/demos/gtk-demo/css_basics.c
@@ -1,7 +1,8 @@
 /* Theming/CSS Basics
 *
- * GTK themes are written using CSS. Every widget is build of multiple items
+ * Gtk themes are written using CSS. Every widget is build of multiple items
 * that you can style very similarly to a regular website.
+ *
 */

 #include <gtk/gtk.h>
@@ -12,22 +13,19 @@ show_parsing_error (GtkCssProvider *provider,
                    const GError   *error,
                    GtkTextBuffer  *buffer)
 {
-  const GtkCssLocation *start_location, *end_location;
  GtkTextIter start, end;
  const char *tag_name;

-  start_location = gtk_css_section_get_start_location (section);
  gtk_text_buffer_get_iter_at_line_index (buffer,
                                          &start,
-                                          start_location->lines,
-                                          start_location->line_bytes);
-  end_location = gtk_css_section_get_end_location (section);
+                                          gtk_css_section_get_start_line (section),
+                                          gtk_css_section_get_start_position (section));
  gtk_text_buffer_get_iter_at_line_index (buffer,
                                          &end,
-                                          end_location->lines,
-                                          end_location->line_bytes);
+                                          gtk_css_section_get_end_line (section),
+                                          gtk_css_section_get_end_position (section));

-  if (error->domain == GTK_CSS_PARSER_WARNING)
+  if (g_error_matches (error, GTK_CSS_PROVIDER_ERROR, GTK_CSS_PROVIDER_ERROR_DEPRECATED))
    tag_name = "warning";
  else
    tag_name = "error";
@@ -54,13 +52,9 @@ css_text_changed (GtkTextBuffer  *buffer,
 static void
 apply_css (GtkWidget *widget, GtkStyleProvider *provider)
 {
-  GtkWidget *child;
-
  gtk_style_context_add_provider (gtk_widget_get_style_context (widget), provider, G_MAXUINT);
-  for (child = gtk_widget_get_first_child (widget);
-       child != NULL;
-       child = gtk_widget_get_next_sibling (child))
-    apply_css (child, provider);
+  if (GTK_IS_CONTAINER (widget))
+    gtk_container_forall (GTK_CONTAINER (widget), (GtkCallback) apply_css, provider);
 }

 GtkWidget *
@@ -75,11 +69,12 @@ do_css_basics (GtkWidget *do_widget)
      GtkTextBuffer *text;
      GBytes *bytes;

-      window = gtk_window_new ();
+      window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
      gtk_window_set_title (GTK_WINDOW (window), "CSS Basics");
      gtk_window_set_transient_for (GTK_WINDOW (window), GTK_WINDOW (do_widget));
      gtk_window_set_default_size (GTK_WINDOW (window), 400, 300);
-      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
+      g_signal_connect (window, "destroy",
+                        G_CALLBACK (gtk_widget_destroyed), &window);

      text = gtk_text_buffer_new (NULL);
      gtk_text_buffer_create_tag (text,
@@ -93,10 +88,10 @@ do_css_basics (GtkWidget *do_widget)

      provider = GTK_STYLE_PROVIDER (gtk_css_provider_new ());

-      container = gtk_scrolled_window_new ();
-      gtk_window_set_child (GTK_WINDOW (window), container);
+      container = gtk_scrolled_window_new (NULL, NULL);
+      gtk_container_add (GTK_CONTAINER (window), container);
      child = gtk_text_view_new_with_buffer (text);
-      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (container), child);
+      gtk_container_add (GTK_CONTAINER (container), child);
      g_signal_connect (text, "changed",
                        G_CALLBACK (css_text_changed), provider);

@@ -115,7 +110,7 @@ do_css_basics (GtkWidget *do_widget)
  if (!gtk_widget_get_visible (window))
    gtk_widget_show (window);
  else
-    gtk_window_destroy (GTK_WINDOW (window));
+    gtk_widget_destroy (window);

  return window;
 }
--- a/demos/gtk-demo/css_basics.css
+++ b/demos/gtk-demo/css_basics.css
@@ -15,10 +15,6 @@
  border: 1px solid;
 }

-window {
-  background-color: white;
-}
-
 /* Make sure selections are visible */
 selection {
  background-color: darkGreen;
--- a/demos/gtk-demo/css_blendmodes.c
+++ b/demos/gtk-demo/css_blendmodes.c
@@ -11,8 +11,8 @@
 * These are the available blend modes.
 */
 struct {
-  const char *name;
-  const char *id;
+  gchar *name;
+  gchar *id;
 } blend_modes[] =
 {
  { "Color", "color" },
@@ -38,14 +38,14 @@ struct {
 #pragma GCC diagnostic ignored "-Wformat-nonliteral"
 static void
 update_css_for_blend_mode (GtkCssProvider *provider,
-                           const char     *blend_mode)
+                           const gchar    *blend_mode)
 {
  GBytes *bytes;
-  char *css;
+  gchar *css;

  bytes = g_resources_lookup_data ("/css_blendmodes/css_blendmodes.css", 0, NULL);

-  css = g_strdup_printf ((char *) g_bytes_get_data (bytes, NULL),
+  css = g_strdup_printf ((gchar*) g_bytes_get_data (bytes, NULL),
                         blend_mode,
                         blend_mode,
                         blend_mode);
@@ -62,7 +62,7 @@ row_activated (GtkListBox     *listbox,
               GtkListBoxRow  *row,
               GtkCssProvider *provider)
 {
-  const char *blend_mode;
+  const gchar *blend_mode;

  blend_mode = blend_modes[gtk_list_box_row_get_index (row)].id;

@@ -75,11 +75,11 @@ setup_listbox (GtkBuilder       *builder,
 {
  GtkWidget *normal_row;
  GtkWidget *listbox;
-  int i;
+  gint i;

  normal_row = NULL;
  listbox = gtk_list_box_new ();
-  gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (WID ("scrolledwindow")), listbox);
+  gtk_container_add (GTK_CONTAINER (WID ("scrolledwindow")), listbox);

  g_signal_connect (listbox, "row-activated", G_CALLBACK (row_activated), provider);

@@ -95,8 +95,9 @@ setup_listbox (GtkBuilder       *builder,
                            "xalign", 0.0,
                            NULL);

-      gtk_list_box_row_set_child (GTK_LIST_BOX_ROW (row), label);
-      gtk_list_box_insert (GTK_LIST_BOX (listbox), row, -1);
+      gtk_container_add (GTK_CONTAINER (row), label);
+
+      gtk_container_add (GTK_CONTAINER (listbox), row);

      /* The first selected row is "normal" */
      if (g_strcmp0 (blend_modes[i].id, "normal") == 0)
@@ -124,7 +125,7 @@ do_css_blendmodes (GtkWidget *do_widget)

      window = WID ("window");
      gtk_window_set_transient_for (GTK_WINDOW (window), GTK_WINDOW (do_widget));
-      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
+      g_signal_connect (window, "destroy", G_CALLBACK (gtk_widget_destroyed), &window);

      /* Setup the CSS provider for window */
      provider = GTK_STYLE_PROVIDER (gtk_css_provider_new ());
@@ -134,14 +135,12 @@ do_css_blendmodes (GtkWidget *do_widget)
                                                  GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);

      setup_listbox (builder, provider);
-
-      g_object_unref (builder);
    }

  if (!gtk_widget_get_visible (window))
    gtk_widget_show (window);
  else
-    gtk_window_destroy (GTK_WINDOW (window));
+    gtk_widget_destroy (window);

  return window;
 }
--- a/demos/gtk-demo/css_multiplebgs.c
+++ b/demos/gtk-demo/css_multiplebgs.c
@@ -1,7 +1,8 @@
 /* Theming/Multiple Backgrounds
 *
- * GTK themes are written using CSS. Every widget is build of multiple items
+ * Gtk themes are written using CSS. Every widget is build of multiple items
 * that you can style very similarly to a regular website.
+ *
 */

 #include <gtk/gtk.h>
@@ -12,23 +13,19 @@ show_parsing_error (GtkCssProvider *provider,
                    const GError   *error,
                    GtkTextBuffer  *buffer)
 {
-  const GtkCssLocation *start_location, *end_location;
  GtkTextIter start, end;
  const char *tag_name;

-  start_location = gtk_css_section_get_start_location (section);
  gtk_text_buffer_get_iter_at_line_index (buffer,
                                          &start,
-                                          start_location->lines,
-                                          start_location->line_bytes);
-  end_location = gtk_css_section_get_end_location (section);
+                                          gtk_css_section_get_start_line (section),
+                                          gtk_css_section_get_start_position (section));
  gtk_text_buffer_get_iter_at_line_index (buffer,
                                          &end,
-                                          end_location->lines,
-                                          end_location->line_bytes);
+                                          gtk_css_section_get_end_line (section),
+                                          gtk_css_section_get_end_position (section));

-
-  if (error->domain == GTK_CSS_PARSER_WARNING)
+  if (g_error_matches (error, GTK_CSS_PROVIDER_ERROR, GTK_CSS_PROVIDER_ERROR_DEPRECATED))
    tag_name = "warning";
  else
    tag_name = "error";
@@ -68,13 +65,9 @@ drawing_area_draw (GtkDrawingArea *da,
 static void
 apply_css (GtkWidget *widget, GtkStyleProvider *provider)
 {
-  GtkWidget *child;
-
  gtk_style_context_add_provider (gtk_widget_get_style_context (widget), provider, G_MAXUINT);
-  for (child = gtk_widget_get_first_child (widget);
-       child != NULL;
-       child = gtk_widget_get_next_sibling (child))
-    apply_css (child, provider);
+  if (GTK_IS_CONTAINER (widget))
+    gtk_container_forall (GTK_CONTAINER (widget), (GtkCallback) apply_css, provider);
 }

 GtkWidget *
@@ -84,40 +77,41 @@ do_css_multiplebgs (GtkWidget *do_widget)

  if (!window)
    {
-      GtkWidget *paned, *overlay, *child, *sw;
+      GtkWidget *paned, *container, *child;
      GtkStyleProvider *provider;
      GtkTextBuffer *text;
      GBytes *bytes;

-      window = gtk_window_new ();
+      window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
      gtk_window_set_title (GTK_WINDOW (window), "Multiple Backgrounds");
      gtk_window_set_transient_for (GTK_WINDOW (window), GTK_WINDOW (do_widget));
      gtk_window_set_default_size (GTK_WINDOW (window), 400, 300);
-      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
+      g_signal_connect (window, "destroy",
+                        G_CALLBACK (gtk_widget_destroyed), &window);

-      overlay = gtk_overlay_new ();
-      gtk_window_set_child (GTK_WINDOW (window), overlay);
+      container = gtk_overlay_new ();
+      gtk_container_add (GTK_CONTAINER (window), container);

      child = gtk_drawing_area_new ();
      gtk_widget_set_name (child, "canvas");
      gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (child),
                                      drawing_area_draw,
                                      NULL, NULL);
-      gtk_overlay_set_child (GTK_OVERLAY (overlay), child);
+      gtk_container_add (GTK_CONTAINER (container), child);

      child = gtk_button_new ();
-      gtk_overlay_add_overlay (GTK_OVERLAY (overlay), child);
+      gtk_overlay_add_overlay (GTK_OVERLAY (container), child);
      gtk_widget_set_name (child, "bricks-button");
      gtk_widget_set_halign (child, GTK_ALIGN_CENTER);
      gtk_widget_set_valign (child, GTK_ALIGN_CENTER);
      gtk_widget_set_size_request (child, 250, 84);

      paned = gtk_paned_new (GTK_ORIENTATION_VERTICAL);
-      gtk_overlay_add_overlay (GTK_OVERLAY (overlay), paned);
+      gtk_overlay_add_overlay (GTK_OVERLAY (container), paned);

      /* Need a filler so we get a handle */
      child = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
-      gtk_paned_set_start_child (GTK_PANED (paned), child);
+      gtk_container_add (GTK_CONTAINER (paned), child);

      text = gtk_text_buffer_new (NULL);
      gtk_text_buffer_create_tag (text,
@@ -131,10 +125,10 @@ do_css_multiplebgs (GtkWidget *do_widget)

      provider = GTK_STYLE_PROVIDER (gtk_css_provider_new ());

-      sw = gtk_scrolled_window_new ();
-      gtk_paned_set_end_child (GTK_PANED (paned), sw);
+      container = gtk_scrolled_window_new (NULL, NULL);
+      gtk_container_add (GTK_CONTAINER (paned), container);
      child = gtk_text_view_new_with_buffer (text);
-      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), child);
+      gtk_container_add (GTK_CONTAINER (container), child);
      g_signal_connect (text,
                        "changed",
                        G_CALLBACK (css_text_changed),
@@ -155,7 +149,7 @@ do_css_multiplebgs (GtkWidget *do_widget)
  if (!gtk_widget_get_visible (window))
    gtk_widget_show (window);
  else
-    gtk_window_destroy (GTK_WINDOW (window));
+    gtk_widget_destroy (window);

  return window;
 }
--- a/demos/gtk-demo/css_pixbufs.c
+++ b/demos/gtk-demo/css_pixbufs.c
@@ -1,7 +1,6 @@
 /* Theming/Animated Backgrounds
 *
- * This demo is in honour of a classic Pixbufs demo.
- *
+ * This demo is done in honour of the Pixbufs demo further down.
 * It is done exclusively with CSS as the background of the window.
 */

@@ -13,23 +12,19 @@ show_parsing_error (GtkCssProvider *provider,
                    const GError   *error,
                    GtkTextBuffer  *buffer)
 {
-  const GtkCssLocation *start_location, *end_location;
  GtkTextIter start, end;
  const char *tag_name;

-  start_location = gtk_css_section_get_start_location (section);
  gtk_text_buffer_get_iter_at_line_index (buffer,
                                          &start,
-                                          start_location->lines,
-                                          start_location->line_bytes);
-  end_location = gtk_css_section_get_end_location (section);
+                                          gtk_css_section_get_start_line (section),
+                                          gtk_css_section_get_start_position (section));
  gtk_text_buffer_get_iter_at_line_index (buffer,
                                          &end,
-                                          end_location->lines,
-                                          end_location->line_bytes);
+                                          gtk_css_section_get_end_line (section),
+                                          gtk_css_section_get_end_position (section));

-
-  if (error->domain == GTK_CSS_PARSER_WARNING)
+  if (g_error_matches (error, GTK_CSS_PROVIDER_ERROR, GTK_CSS_PROVIDER_ERROR_DEPRECATED))
    tag_name = "warning";
  else
    tag_name = "error";
@@ -56,13 +51,9 @@ css_text_changed (GtkTextBuffer  *buffer,
 static void
 apply_css (GtkWidget *widget, GtkStyleProvider *provider)
 {
-  GtkWidget *child;
-
  gtk_style_context_add_provider (gtk_widget_get_style_context (widget), provider, G_MAXUINT);
-  for (child = gtk_widget_get_first_child (widget);
-       child != NULL;
-       child = gtk_widget_get_next_sibling (child))
-    apply_css (child, provider);
+  if (GTK_IS_CONTAINER (widget))
+    gtk_container_forall (GTK_CONTAINER (widget), (GtkCallback) apply_css, provider);
 }

 GtkWidget *
@@ -77,18 +68,19 @@ do_css_pixbufs (GtkWidget *do_widget)
      GtkTextBuffer *text;
      GBytes *bytes;

-      window = gtk_window_new ();
+      window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
      gtk_window_set_title (GTK_WINDOW (window), "Animated Backgrounds");
      gtk_window_set_transient_for (GTK_WINDOW (window), GTK_WINDOW (do_widget));
      gtk_window_set_default_size (GTK_WINDOW (window), 400, 300);
-      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
+      g_signal_connect (window, "destroy",
+                        G_CALLBACK (gtk_widget_destroyed), &window);

      paned = gtk_paned_new (GTK_ORIENTATION_VERTICAL);
-      gtk_window_set_child (GTK_WINDOW (window), paned);
+      gtk_container_add (GTK_CONTAINER (window), paned);

      /* Need a filler so we get a handle */
      child = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
-      gtk_paned_set_start_child (GTK_PANED (paned), child);
+      gtk_container_add (GTK_CONTAINER (paned), child);

      text = gtk_text_buffer_new (NULL);
      gtk_text_buffer_create_tag (text,
@@ -102,10 +94,10 @@ do_css_pixbufs (GtkWidget *do_widget)

      provider = GTK_STYLE_PROVIDER (gtk_css_provider_new ());

-      container = gtk_scrolled_window_new ();
-      gtk_paned_set_end_child (GTK_PANED (paned), container);
+      container = gtk_scrolled_window_new (NULL, NULL);
+      gtk_container_add (GTK_CONTAINER (paned), container);
      child = gtk_text_view_new_with_buffer (text);
-      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (container), child);
+      gtk_container_add (GTK_CONTAINER (container), child);
      g_signal_connect (text, "changed",
                        G_CALLBACK (css_text_changed), provider);

@@ -124,7 +116,7 @@ do_css_pixbufs (GtkWidget *do_widget)
  if (!gtk_widget_get_visible (window))
    gtk_widget_show (window);
  else
-    gtk_window_destroy (GTK_WINDOW (window));
+    gtk_widget_destroy (window);

  return window;
 }
--- a/demos/gtk-demo/css_pixbufs.css
+++ b/demos/gtk-demo/css_pixbufs.css
@@ -46,19 +46,19 @@
 }

@keyframes size-the-image {
-    0% { background-size: 96px, 12px, 96px, 12px, 96px, 12px, 96px, 12px, auto; }
-    100% { background-size: 12px, 96px, 12px, 96px, 12px, 96px, 12px, 96px, auto; }
+    0% { background-size: 96px, 12px, 96px, 12px, 96px, 12px, 96px, 12px, auto }
+    100% { background-size: 12px, 96px, 12px, 96px, 12px, 96px, 12px, 96px, auto }
 }

 window {
-    background-image: url("resource://css_pixbufs/images/apple-red.png"),
-                      url("resource://css_pixbufs/images/gnome-applets.png"),
-                      url("resource://css_pixbufs/images/gnome-calendar.png"),
-                      url("resource://css_pixbufs/images/gnome-foot.png"),
-                      url("resource://css_pixbufs/images/gnome-gmush.png"),
-                      url("resource://css_pixbufs/images/gnome-gimp.png"),
-                      url("resource://css_pixbufs/images/gnome-gsame.png"),
-                      url("resource://css_pixbufs/images/gnu-keys.png"),
+    background-image: url("resource://css_pixbufs/apple-red.png"),
+                      url("resource://css_pixbufs/gnome-applets.png"),
+                      url("resource://css_pixbufs/gnome-calendar.png"),
+                      url("resource://css_pixbufs/gnome-foot.png"),
+                      url("resource://css_pixbufs/gnome-gmush.png"),
+                      url("resource://css_pixbufs/gnome-gimp.png"),
+                      url("resource://css_pixbufs/gnome-gsame.png"),
+                      url("resource://css_pixbufs/gnu-keys.png"),
                      url("resource://css_pixbufs/background.jpg");
    background-position: 50.00% 75.00%, 67.68% 67.68%, 75.00% 50.00%, 67.68% 32.32%, 50.00% 25.00%, 32.32% 32.32%, 25.00% 50.00%, 32.32% 67.68%, 0% 0%;
    background-repeat: no-repeat, no-repeat, no-repeat, no-repeat, no-repeat, no-repeat, no-repeat, no-repeat, repeat;
--- a/demos/gtk-demo/css_shadows.c
+++ b/demos/gtk-demo/css_shadows.c
@@ -11,22 +11,19 @@ show_parsing_error (GtkCssProvider *provider,
                    const GError   *error,
                    GtkTextBuffer  *buffer)
 {
-  const GtkCssLocation *start_location, *end_location;
  GtkTextIter start, end;
  const char *tag_name;

-  start_location = gtk_css_section_get_start_location (section);
  gtk_text_buffer_get_iter_at_line_index (buffer,
                                          &start,
-                                          start_location->lines,
-                                          start_location->line_bytes);
-  end_location = gtk_css_section_get_end_location (section);
+                                          gtk_css_section_get_start_line (section),
+                                          gtk_css_section_get_start_position (section));
  gtk_text_buffer_get_iter_at_line_index (buffer,
                                          &end,
-                                          end_location->lines,
-                                          end_location->line_bytes);
+                                          gtk_css_section_get_end_line (section),
+                                          gtk_css_section_get_end_position (section));

-  if (error->domain == GTK_CSS_PARSER_WARNING)
+  if (g_error_matches (error, GTK_CSS_PROVIDER_ERROR, GTK_CSS_PROVIDER_ERROR_DEPRECATED))
    tag_name = "warning";
  else
    tag_name = "error";
@@ -53,32 +50,31 @@ css_text_changed (GtkTextBuffer  *buffer,
 static void
 apply_css (GtkWidget *widget, GtkStyleProvider *provider)
 {
-  GtkWidget *child;
-
  gtk_style_context_add_provider (gtk_widget_get_style_context (widget), provider, G_MAXUINT);
-  for (child = gtk_widget_get_first_child (widget);
-       child != NULL;
-       child = gtk_widget_get_next_sibling (child))
-    apply_css (child, provider);
+  if (GTK_IS_CONTAINER (widget))
+    gtk_container_forall (GTK_CONTAINER (widget), (GtkCallback) apply_css, provider);
 }

-static GtkWidget *
+GtkWidget *
 create_toolbar (void)
 {
  GtkWidget *toolbar;
-  GtkWidget *item;
+  GtkToolItem *item;

-  toolbar = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+  toolbar = gtk_toolbar_new ();
  gtk_widget_set_valign (toolbar, GTK_ALIGN_CENTER);

-  item = gtk_button_new_from_icon_name ("go-next");
-  gtk_box_append (GTK_BOX (toolbar), item);
+  item = gtk_tool_button_new (NULL, NULL);
+  gtk_tool_button_set_icon_name (GTK_TOOL_BUTTON (item), "go-next");
+  gtk_toolbar_insert (GTK_TOOLBAR (toolbar), item, -1);

-  item = gtk_button_new_from_icon_name ("go-previous");
-  gtk_box_append (GTK_BOX (toolbar), item);
+  item = gtk_tool_button_new (NULL, NULL);
+  gtk_tool_button_set_icon_name (GTK_TOOL_BUTTON (item), "go-previous");
+  gtk_toolbar_insert (GTK_TOOLBAR (toolbar), item, -1);

-  item = gtk_button_new_with_label ("Hello World");
-  gtk_box_append (GTK_BOX (toolbar), item);
+  item = gtk_tool_button_new (NULL, "Hello World");
+  gtk_tool_item_set_is_important (item, TRUE);
+  gtk_toolbar_insert (GTK_TOOLBAR (toolbar), item, -1);

  return toolbar;
 }
@@ -95,18 +91,18 @@ do_css_shadows (GtkWidget *do_widget)
      GtkTextBuffer *text;
      GBytes *bytes;

-      window = gtk_window_new ();
+      window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
      gtk_window_set_title (GTK_WINDOW (window), "Shadows");
      gtk_window_set_transient_for (GTK_WINDOW (window), GTK_WINDOW (do_widget));
      gtk_window_set_default_size (GTK_WINDOW (window), 400, 300);
-      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
+      g_signal_connect (window, "destroy",
+                        G_CALLBACK (gtk_widget_destroyed), &window);

      paned = gtk_paned_new (GTK_ORIENTATION_VERTICAL);
-      gtk_window_set_child (GTK_WINDOW (window), paned);
+      gtk_container_add (GTK_CONTAINER (window), paned);

      child = create_toolbar ();
-      gtk_paned_set_start_child (GTK_PANED (paned), child);
-      gtk_paned_set_resize_start_child (GTK_PANED (paned), FALSE);
+      gtk_container_add (GTK_CONTAINER (paned), child);

      text = gtk_text_buffer_new (NULL);
      gtk_text_buffer_create_tag (text,
@@ -120,10 +116,10 @@ do_css_shadows (GtkWidget *do_widget)

      provider = GTK_STYLE_PROVIDER (gtk_css_provider_new ());

-      container = gtk_scrolled_window_new ();
-      gtk_paned_set_end_child (GTK_PANED (paned), container);
+      container = gtk_scrolled_window_new (NULL, NULL);
+      gtk_container_add (GTK_CONTAINER (paned), container);
      child = gtk_text_view_new_with_buffer (text);
-      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (container), child);
+      gtk_container_add (GTK_CONTAINER (container), child);
      g_signal_connect (text, "changed",
                        G_CALLBACK (css_text_changed), provider);

@@ -142,7 +138,7 @@ do_css_shadows (GtkWidget *do_widget)
  if (!gtk_widget_get_visible (window))
    gtk_widget_show (window);
  else
-    gtk_window_destroy (GTK_WINDOW (window));
+    gtk_widget_destroy (window);

  return window;
 }
--- a/demos/gtk-demo/cursors.c
+++ b/demos/gtk-demo/cursors.c
@@ -1,8 +1,9 @@
 /* Cursors
 *
- * Demonstrates a useful set of available cursors. The cursors shown here are the
- * ones defined by CSS, which we assume to be available. The example shows creating
- * cursors by name or from an image, with or without a fallback.
+ * Demonstrates a useful set of available cursors. The cursors shown here are the ones
+ * defined by CSS, which we assume to be available.
+ *
+ * The example shows creating cursors by name or from an image, with or without a fallback.
 */

 #include <gtk/gtk.h>
@@ -23,19 +24,20 @@ do_cursors (GtkWidget *do_widget)
      GtkBuilder *builder;

      builder = gtk_builder_new_from_resource ("/cursors/cursors.ui");
+      gtk_builder_connect_signals (builder, NULL);
      window = GTK_WIDGET (gtk_builder_get_object (builder, "window"));
      gtk_window_set_display (GTK_WINDOW (window),
                              gtk_widget_get_display (do_widget));
      g_signal_connect (window, "destroy",
                        G_CALLBACK (on_destroy), NULL);
-      g_object_unref (builder);
+      g_object_set_data_full (G_OBJECT (window), "builder", builder, g_object_unref);
    }

  if (!gtk_widget_get_visible (window))
    gtk_widget_show (window);
  else
    {
-      gtk_window_destroy (GTK_WINDOW (window));
+      gtk_widget_destroy (window);
    }

  return window;
--- a/demos/gtk-demo/cursors.ui
+++ b/demos/gtk-demo/cursors.ui
--- a/demos/gtk-demo/data/16x16/gtk4-demo-symbolic.symbolic.png
+++ b/demos/gtk-demo/data/16x16/gtk4-demo-symbolic.symbolic.png
--- a/demos/gtk-demo/data/16x16/gtk4-demo.png
+++ b/demos/gtk-demo/data/16x16/gtk4-demo.png
--- a/demos/gtk-demo/data/22x22/gtk4-demo-symbolic.symbolic.png
+++ b/demos/gtk-demo/data/22x22/gtk4-demo-symbolic.symbolic.png
--- a/demos/gtk-demo/data/22x22/gtk4-demo.png
+++ b/demos/gtk-demo/data/22x22/gtk4-demo.png
--- a/demos/gtk-demo/data/24x24/gtk4-demo-symbolic.symbolic.png
+++ b/demos/gtk-demo/data/24x24/gtk4-demo-symbolic.symbolic.png
--- a/demos/gtk-demo/data/24x24/gtk4-demo.png
+++ b/demos/gtk-demo/data/24x24/gtk4-demo.png
--- a/demos/gtk-demo/data/256x256/gtk4-demo-symbolic.symbolic.png
+++ b/demos/gtk-demo/data/256x256/gtk4-demo-symbolic.symbolic.png
--- a/demos/gtk-demo/data/256x256/gtk4-demo.png
+++ b/demos/gtk-demo/data/256x256/gtk4-demo.png
--- a/demos/gtk-demo/data/32x32/gtk4-demo-symbolic.symbolic.png
+++ b/demos/gtk-demo/data/32x32/gtk4-demo-symbolic.symbolic.png
--- a/demos/gtk-demo/data/32x32/gtk4-demo.png
+++ b/demos/gtk-demo/data/32x32/gtk4-demo.png
--- a/Show More
+++ b/Show More