[gnome-control-center] background: Sort Pictures folder by name

[Bastien Nocera <hadess src gnome org>]

commit 0bb2e2142a801178c44c23ccebb975e3987221bd
Author: Jon McCann <jmccann redhat com>
Date:   Wed Mar 28 15:01:53 2012 -0400

    background: Sort Pictures folder by name
    
    https://bugzilla.gnome.org/show_bug.cgi?id=672925

 panels/background/bg-pictures-source.c |   42 ++++++++++++++++++++++++++++++++
 1 files changed, 42 insertions(+), 0 deletions(-)
---
diff --git a/panels/background/bg-pictures-source.c b/panels/background/bg-pictures-source.c
index 80ffce7..e1e1483 100644
--- a/panels/background/bg-pictures-source.c
+++ b/panels/background/bg-pictures-source.c
@@ -128,6 +128,36 @@ bg_pictures_source_class_init (BgPicturesSourceClass *klass)
   object_class->finalize = bg_pictures_source_finalize;
 }
 
+static int
+sort_func (GtkTreeModel *model,
+           GtkTreeIter *a,
+           GtkTreeIter *b,
+           BgPicturesSource *bg_source)
+{
+  CcBackgroundItem *item_a;
+  CcBackgroundItem *item_b;
+  const char *name_a;
+  const char *name_b;
+  int retval;
+
+  gtk_tree_model_get (model, a,
+                      1, &item_a,
+                      -1);
+  gtk_tree_model_get (model, b,
+                      1, &item_b,
+                      -1);
+
+  name_a = cc_background_item_get_name (item_a);
+  name_b = cc_background_item_get_name (item_b);
+
+  retval = g_utf8_collate (name_a, name_b);
+
+  g_object_unref (item_a);
+  g_object_unref (item_b);
+
+  return retval;
+}
+
 static void
 picture_scaled (GObject *source_object,
                 GAsyncResult *res,
@@ -146,6 +176,16 @@ picture_scaled (GObject *source_object,
   store = bg_source_get_liststore (BG_SOURCE (bg_source));
   item = g_object_get_data (source_object, "item");
 
+  gtk_tree_sortable_set_sort_func (GTK_TREE_SORTABLE (store),
+                                   1,
+                                   (GtkTreeIterCompareFunc)sort_func,
+                                   bg_source,
+                                   NULL);
+
+  gtk_tree_sortable_set_sort_column_id (GTK_TREE_SORTABLE (store),
+                                        1,
+                                        GTK_SORT_ASCENDING);
+
   pixbuf = gdk_pixbuf_new_from_stream_finish (res, &error);
   if (pixbuf == NULL)
     {
@@ -167,6 +207,8 @@ picture_scaled (GObject *source_object,
       return;
     }
 
+  cc_background_item_load (item, NULL);
+
   /* insert the item into the liststore */
   gtk_list_store_insert_with_values (store, &iter, 0,
                                      0, pixbuf,