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5f070ff233386eae3b3290d12ba67745833dcb8c
gtk/demos/constraint-editor/constraint-editor-window.c
Emmanuele Bassi 5f070ff233 Remove filename/URI API from GtkFileChooser 
GtkFileChooser's API predates GIO by a few years, so it started off with
filenames and URI as character arrays. After introducing GIO as a
dependency, the API included GFile-based entry points.

It's much more appropriate to use GFile everywhere, as we want to
encourage people to use GIO instead of passing random bytes to low level
POSIX API.

See: #2455
2020-02-22 15:22:06 +00:00

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/*
* 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;
item = g_list_model_get_item (list, i);
constraint = GTK_CONSTRAINT (item);
target = gtk_constraint_get_target (constraint);
source = gtk_constraint_get_source (constraint);
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),
gtk_constraint_get_target_attribute (constraint),
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,
gint 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,
gint 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, -1,
NULL, FALSE,
G_FILE_CREATE_NONE,
NULL,
NULL,
&error);
if (error != NULL)
{
GtkWidget *dialog;
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 (dialog),
"%s", error->message);
g_signal_connect (dialog, "response", G_CALLBACK (gtk_widget_destroy), NULL);
gtk_widget_show (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_widget_destroy (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_container_add (GTK_CONTAINER (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_widget_destroy (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_container_add (GTK_CONTAINER (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);
g_type_ensure (CONSTRAINT_VIEW_TYPE);
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);
g_object_set (label, "margin", 10, NULL);
gtk_label_set_xalign (GTK_LABEL (label), 0.0);
gtk_widget_set_hexpand (label, TRUE);
gtk_container_add (GTK_CONTAINER (row), box);
gtk_container_add (GTK_CONTAINER (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_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);
g_signal_connect (button, "clicked", G_CALLBACK (row_edit), win);
g_object_set_data (G_OBJECT (row), "edit", button);
gtk_container_add (GTK_CONTAINER (box), button);
button = gtk_button_new_from_icon_name ("edit-delete-symbolic");
gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);
g_signal_connect (button, "clicked", G_CALLBACK (row_delete), win);
gtk_container_add (GTK_CONTAINER (box), button);
}
else if (GTK_IS_WIDGET (item))
{
button = gtk_button_new_from_icon_name ("edit-delete-symbolic");
gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);
g_signal_connect (button, "clicked", G_CALLBACK (row_delete), win);
gtk_container_add (GTK_CONTAINER (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);
}
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