[gtk+/font-chooser-api] prop-editor: Allow editing PANGO_TYPE_FONT_DESCRIPTION properties

[Christian Persch <chpe src gnome org>]

commit 3c49cd4b6948caa01a8b1a60b28c9fb176201683
Author: Christian Persch <chpe gnome org>
Date:   Mon Sep 12 21:29:24 2011 +0200

    prop-editor: Allow editing PANGO_TYPE_FONT_DESCRIPTION properties
    
    ...using a GtkFontButton.

 tests/prop-editor.c |   63 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 63 insertions(+), 0 deletions(-)
---
diff --git a/tests/prop-editor.c b/tests/prop-editor.c
index a12b77c..674fb0c 100644
--- a/tests/prop-editor.c
+++ b/tests/prop-editor.c
@@ -704,6 +704,56 @@ color_changed (GObject *object, GParamSpec *pspec, gpointer data)
   g_value_unset (&val);
 }
 
+static void
+font_modified (GtkFontChooser *fb, GParamSpec *pspec, gpointer data)
+{
+  ObjectProperty *p = data;
+  PangoFontDescription *font_desc;
+
+  font_desc = gtk_font_chooser_get_font_desc (fb);
+
+  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, font_desc, NULL);
+    }
+  else
+    g_object_set (p->obj, p->spec->name, font_desc, NULL);
+
+  pango_font_description_free (font_desc);
+}
+
+static void
+font_changed (GObject *object, GParamSpec *pspec, gpointer data)
+{
+  GtkFontChooser *fb = GTK_FONT_CHOOSER (data);
+  GValue val = { 0, };
+  const PangoFontDescription *font_desc;
+  PangoFontDescription *fb_font_desc;
+
+  g_value_init (&val, PANGO_TYPE_FONT_DESCRIPTION);
+  get_property_value (object, pspec, &val);
+
+  font_desc = g_value_get_boxed (&val);
+  fb_font_desc = gtk_font_chooser_get_font_desc (fb);
+
+  if (font_desc == NULL ||
+      (fb_font_desc != NULL &&
+       !pango_font_description_equal (fb_font_desc, font_desc)))
+    {
+      block_controller (G_OBJECT (fb));
+      gtk_font_chooser_set_font_desc (fb, font_desc);
+      unblock_controller (G_OBJECT (fb));
+    }
+
+  g_value_unset (&val);
+  pango_font_description_free (fb_font_desc);
+}
+
+
 static GtkWidget *
 property_widget (GObject    *object,
                  GParamSpec *spec,
@@ -930,6 +980,19 @@ property_widget (GObject    *object,
         connect_controller (G_OBJECT (prop_edit), "color-set",
                             object, spec, G_CALLBACK (color_modified));
     }
+  else if (type == G_TYPE_PARAM_BOXED &&
+           G_PARAM_SPEC_VALUE_TYPE (spec) == PANGO_TYPE_FONT_DESCRIPTION)
+    {
+      prop_edit = gtk_font_button_new ();
+
+      g_object_connect_property (object, spec,
+                                 G_CALLBACK (font_changed),
+                                 prop_edit, G_OBJECT (prop_edit));
+
+      if (can_modify)
+        connect_controller (G_OBJECT (prop_edit), "notify::font-desc",
+                            object, spec, G_CALLBACK (font_modified));
+    }
   else
     {
       msg = g_strdup_printf ("uneditable property type: %s",