[clutter/wip/apocalypses/apocalypse-1: 21/46] actor: Implement Container::sort_depth_order

[Emmanuele Bassi <ebassi src gnome org>]

commit 556f81bf73fe102404c4f111ccc3de9eb4afe316
Author: Emmanuele Bassi <ebassi linux intel com>
Date:   Tue Nov 29 18:02:20 2011 +0000

    actor: Implement Container::sort_depth_order
    
    There's no reason this vfunc should be left out.

 clutter/clutter-actor.c |   27 +++++++++++++++++++++++++++
 1 files changed, 27 insertions(+), 0 deletions(-)
---
diff --git a/clutter/clutter-actor.c b/clutter/clutter-actor.c
index 5774e3f..84f77f7 100644
--- a/clutter/clutter-actor.c
+++ b/clutter/clutter-actor.c
@@ -10171,6 +10171,32 @@ container_lower (ClutterContainer *container,
   clutter_actor_queue_relayout (self);
 }
 
+static gint
+sort_by_depth (gconstpointer a,
+               gconstpointer b)
+{
+  const ClutterActor *actor_a = a;
+  const ClutterActor *actor_b = b;
+
+  if (actor_a->priv->z < actor_b->priv->z)
+    return -1;
+
+  if (actor_a->priv->z > actor_b->priv->z)
+    return 1;
+
+  return 0;
+}
+
+static void
+container_sort_by_depth (ClutterContainer *container)
+{
+  ClutterActorPrivate *priv = CLUTTER_ACTOR (container)->priv;
+
+  priv->children = g_list_sort (priv->children, sort_by_depth);
+
+  clutter_actor_queue_relayout (CLUTTER_ACTOR (container));
+}
+
 static void
 clutter_container_iface_init (ClutterContainerIface *iface)
 {
@@ -10180,6 +10206,7 @@ clutter_container_iface_init (ClutterContainerIface *iface)
 
   iface->raise = container_raise;
   iface->lower = container_lower;
+  iface->sort_depth_order = container_sort_by_depth;
 }
 
 typedef enum