Add a constraint editor demo
This is an initial cut at providing a tool for interactive exploration of constraints.
This commit is contained in:
Matthias Clasen
committed by
Emmanuele Bassi
Emmanuele Bassi
parent
9a463056d0
commit
514de0b91a
318
demos/constraint-editor/guide-editor.c
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318
demos/constraint-editor/guide-editor.c
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/*
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* Copyright © 2019 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Authors: Matthias Clasen
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*/
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#include "config.h"
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#include "guide-editor.h"
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struct _GuideEditor
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{
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GtkWidget parent_instance;
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GtkWidget *grid;
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GtkWidget *name;
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GtkWidget *min_width;
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GtkWidget *min_height;
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GtkWidget *nat_width;
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GtkWidget *nat_height;
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GtkWidget *max_width;
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GtkWidget *max_height;
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GtkWidget *strength;
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GtkWidget *button;
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GtkConstraintGuide *guide;
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gboolean constructed;
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};
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enum {
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PROP_GUIDE = 1,
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LAST_PROP
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};
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static GParamSpec *pspecs[LAST_PROP];
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enum {
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DONE,
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LAST_SIGNAL
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};
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static guint signals[LAST_SIGNAL];
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G_DEFINE_TYPE(GuideEditor, guide_editor, GTK_TYPE_WIDGET);
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static void
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guide_strength_combo (GtkWidget *combo)
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{
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gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "weak", "Weak");
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gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "medium", "Medium");
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gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "strong", "Strong");
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gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "required", "Required");
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}
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#if 0
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static GtkConstraintStrength
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get_strength (const char *id)
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{
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GtkConstraintStrength strength;
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GEnumClass *class = g_type_class_ref (GTK_TYPE_CONSTRAINT_STRENGTH);
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GEnumValue *value = g_enum_get_value_by_nick (class, id);
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strength = value->value;
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g_type_class_unref (class);
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return strength;
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}
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#endif
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const char *
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get_strength_nick (GtkConstraintStrength strength)
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{
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GEnumClass *class = g_type_class_ref (GTK_TYPE_CONSTRAINT_STRENGTH);
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GEnumValue *value = g_enum_get_value (class, strength);
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const char *nick = value->value_nick;
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g_type_class_unref (class);
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return nick;
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}
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static void
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create_guide (GtkButton *button,
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GuideEditor *editor)
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{
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#if 0
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const char *id;
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int strength;
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#endif
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const char *name;
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int w, h;
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GtkConstraintGuide *guide;
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//guide = gtk_constraint_guide_new ();
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if (editor->guide)
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guide = g_object_ref (editor->guide);
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else
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guide = g_object_new (GTK_TYPE_CONSTRAINT_GUIDE, NULL);
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name = gtk_editable_get_text (GTK_EDITABLE (editor->name));
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g_object_set_data_full (G_OBJECT (guide), "name", g_strdup (name), g_free);
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w = gtk_spin_button_get_value_as_int (GTK_SPIN_BUTTON (editor->min_width));
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h = gtk_spin_button_get_value_as_int (GTK_SPIN_BUTTON (editor->min_height));
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//gtk_constraint_guide_set_min_size (guide, w, h);
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g_object_set (guide, "min-width", w, "min-height", h, NULL);
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w = gtk_spin_button_get_value_as_int (GTK_SPIN_BUTTON (editor->nat_width));
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h = gtk_spin_button_get_value_as_int (GTK_SPIN_BUTTON (editor->nat_height));
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//gtk_constraint_guide_set_nat_size (guide, w, h);
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g_object_set (guide, "nat-width", w, "nat-height", h, NULL);
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#if 0
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w = gtk_spin_button_get_value_as_int (GTK_SPIN_BUTTON (editor->max_width));
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h = gtk_spin_button_get_value_as_int (GTK_SPIN_BUTTON (editor->max_height));
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gtk_constraint_guide_set_max_size (guide, w, h);
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id = gtk_combo_box_get_active_id (GTK_COMBO_BOX (editor->strength));
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strength = get_strength (id);
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gtk_constraint_guide_set_strength (guide, strength);
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#endif
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g_signal_emit (editor, signals[DONE], 0, guide);
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g_object_unref (guide);
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}
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static void
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guide_editor_init (GuideEditor *editor)
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{
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gtk_widget_init_template (GTK_WIDGET (editor));
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}
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static int guide_counter;
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static void
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guide_editor_constructed (GObject *object)
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{
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GuideEditor *editor = GUIDE_EDITOR (object);
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guide_strength_combo (editor->strength);
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gtk_widget_set_sensitive (editor->max_width, FALSE);
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gtk_widget_set_sensitive (editor->max_height, FALSE);
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gtk_widget_set_sensitive (editor->strength, FALSE);
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if (editor->guide)
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{
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#if 0
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GtkConstaintStrength strength;
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#endif
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const char *nick;
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int w, h;
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nick = (char *)g_object_get_data (G_OBJECT (editor->guide), "name");
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gtk_editable_set_text (GTK_EDITABLE (editor->name), nick);
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//gtk_constaint_guide_get_min_size (editor->guide, &w, &h);
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g_object_get (editor->guide, "min-width", &w, "min-height", &h, NULL);
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gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->min_width), w);
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gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->min_height), h);
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//gtk_constaint_guide_get_nat_size (editor->guide, &w, &h);
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g_object_get (editor->guide, "nat-width", &w, "nat-height", &h, NULL);
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gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->nat_width), w);
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gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->nat_height), h);
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#if 0
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gtk_constaint_guide_get_max_size (editor->guide, &w, &h);
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gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->max_width), w);
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gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->max_height), h);
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strength = gtk_guide_get_strength (editor->guide);
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nick = get_strength_nick (strength);
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gtk_combo_box_set_active_id (GTK_COMBO_BOX (editor->strength), nick);
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#endif
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gtk_button_set_label (GTK_BUTTON (editor->button), "Apply");
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}
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else
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{
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char *name;
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guide_counter++;
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name = g_strdup_printf ("Guide %d", guide_counter);
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gtk_editable_set_text (GTK_EDITABLE (editor->name), name);
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g_free (name);
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gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->min_width), 0.0);
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gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->min_height), 0.0);
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gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->nat_width), 0.0);
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gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->nat_height), 0.0);
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#if 0
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gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->max_width), G_MAXINT);
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gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->max_height), G_MAXINT);
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gtk_combo_box_set_active_id (GTK_COMBO_BOX (editor->strength), "medium");
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#endif
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gtk_button_set_label (GTK_BUTTON (editor->button), "Create");
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}
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editor->constructed = TRUE;
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}
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static void
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guide_editor_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GuideEditor *self = GUIDE_EDITOR (object);
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switch (property_id)
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{
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case PROP_GUIDE:
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self->guide = g_value_dup_object (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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}
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}
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static void
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guide_editor_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GuideEditor *self = GUIDE_EDITOR (object);
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switch (property_id)
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{
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case PROP_GUIDE:
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g_value_set_object (value, self->guide);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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}
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}
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static void
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guide_editor_dispose (GObject *object)
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{
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GuideEditor *self = (GuideEditor *)object;
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g_clear_pointer (&self->grid, gtk_widget_unparent);
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g_clear_object (&self->guide);
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G_OBJECT_CLASS (guide_editor_parent_class)->dispose (object);
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}
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static void
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guide_editor_class_init (GuideEditorClass *class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
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object_class->constructed = guide_editor_constructed;
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object_class->dispose = guide_editor_dispose;
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object_class->set_property = guide_editor_set_property;
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object_class->get_property = guide_editor_get_property;
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pspecs[PROP_GUIDE] =
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g_param_spec_object ("guide", "guide", "guide",
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GTK_TYPE_CONSTRAINT_GUIDE,
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G_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY);
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g_object_class_install_properties (object_class, LAST_PROP, pspecs);
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signals[DONE] =
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g_signal_new ("done",
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G_TYPE_FROM_CLASS (object_class),
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G_SIGNAL_RUN_LAST,
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0,
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NULL, NULL,
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NULL,
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G_TYPE_NONE, 1, GTK_TYPE_CONSTRAINT_GUIDE);
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gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_BIN_LAYOUT);
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gtk_widget_class_set_template_from_resource (widget_class,
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"/org/gtk/gtk4/constraint-editor/guide-editor.ui");
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gtk_widget_class_bind_template_child (widget_class, GuideEditor, grid);
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gtk_widget_class_bind_template_child (widget_class, GuideEditor, name);
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gtk_widget_class_bind_template_child (widget_class, GuideEditor, min_width);
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gtk_widget_class_bind_template_child (widget_class, GuideEditor, min_height);
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gtk_widget_class_bind_template_child (widget_class, GuideEditor, nat_width);
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gtk_widget_class_bind_template_child (widget_class, GuideEditor, nat_height);
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gtk_widget_class_bind_template_child (widget_class, GuideEditor, max_width);
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gtk_widget_class_bind_template_child (widget_class, GuideEditor, max_height);
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gtk_widget_class_bind_template_child (widget_class, GuideEditor, strength);
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gtk_widget_class_bind_template_child (widget_class, GuideEditor, button);
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gtk_widget_class_bind_template_callback (widget_class, create_guide);
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}
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GuideEditor *
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guide_editor_new (GtkConstraintGuide *guide)
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{
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return g_object_new (GUIDE_EDITOR_TYPE,
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"guide", guide,
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NULL);
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}
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