[gtk+/gtk-3-2] prop-editor: Implement property editing for GdkRGBA properties

[Matthias Clasen <matthiasc src gnome org>]

commit 901449adf761c520afa3de6466d583b95c2cf319
Author: Christian Persch <chpe gnome org>
Date:   Mon Nov 21 14:07:06 2011 +0100

    prop-editor: Implement property editing for GdkRGBA properties
    
    Bug #664467.

 tests/prop-editor.c |   58 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 58 insertions(+), 0 deletions(-)
---
diff --git a/tests/prop-editor.c b/tests/prop-editor.c
index 674fb0c..edb6e3b 100644
--- a/tests/prop-editor.c
+++ b/tests/prop-editor.c
@@ -661,6 +661,50 @@ object_properties (GtkWidget *button,
 }
 
 static void
+rgba_modified (GtkColorButton *cb, gpointer data)
+{
+  ObjectProperty *p = data;
+  GdkRGBA color;
+
+  gtk_color_button_get_rgba (cb, &color);
+
+  if (is_child_property (p->spec))
+    {
+      GtkWidget *widget = GTK_WIDGET (p->obj);
+      GtkWidget *parent = gtk_widget_get_parent (widget);
+
+      gtk_container_child_set (GTK_CONTAINER (parent),
+                               widget, p->spec->name, &color, NULL);
+    }
+  else
+    g_object_set (p->obj, p->spec->name, &color, NULL);
+}
+
+static void
+rgba_changed (GObject *object, GParamSpec *pspec, gpointer data)
+{
+  GtkColorButton *cb = GTK_COLOR_BUTTON (data);
+  GValue val = G_VALUE_INIT;
+  GdkRGBA *color;
+  GdkRGBA cb_color;
+
+  g_value_init (&val, GDK_TYPE_RGBA);
+  get_property_value (object, pspec, &val);
+
+  color = g_value_get_boxed (&val);
+  gtk_color_button_get_rgba (cb, &cb_color);
+
+  if (color != NULL && !gdk_rgba_equal (color, &cb_color))
+    {
+      block_controller (G_OBJECT (cb));
+      gtk_color_button_set_rgba (cb, color);
+      unblock_controller (G_OBJECT (cb));
+    }
+
+  g_value_unset (&val);
+}
+
+static void
 color_modified (GtkColorButton *cb, gpointer data)
 {
   ObjectProperty *p = data;
@@ -968,6 +1012,20 @@ property_widget (GObject    *object,
       can_modify = TRUE;
     }
   else if (type == G_TYPE_PARAM_BOXED &&
+           G_PARAM_SPEC_VALUE_TYPE (spec) == GDK_TYPE_RGBA)
+    {
+      prop_edit = gtk_color_button_new ();
+      gtk_color_button_set_use_alpha (GTK_COLOR_BUTTON (prop_edit), TRUE);
+
+      g_object_connect_property (object, spec,
+                                 G_CALLBACK (rgba_changed),
+                                 prop_edit, G_OBJECT (prop_edit));
+
+      if (can_modify)
+        connect_controller (G_OBJECT (prop_edit), "color-set",
+                            object, spec, G_CALLBACK (rgba_modified));
+    }
+  else if (type == G_TYPE_PARAM_BOXED &&
            G_PARAM_SPEC_VALUE_TYPE (spec) == GDK_TYPE_COLOR)
     {
       prop_edit = gtk_color_button_new ();