[gnome-2048] Reverse show animation manually

[Juan R. Garcia Blanco <juanrgar src gnome org>]

commit 2b38ed8698eb76811f96cf5d7026517ab35decfa
Author: Juan R. García Blanco <juanrgar gmail com>
Date:   Thu Feb 12 21:06:27 2015 +0100

    Reverse show animation manually
    
    TransitionGroup::auto-reverse property does not seem to work very well,
    as tiles often fail to get back to 1.0 scale. Reversing the animation
    manually seems to be much better.

 src/game.vala |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)
---
diff --git a/src/game.vala b/src/game.vala
index 933316c..bf84d94 100644
--- a/src/game.vala
+++ b/src/game.vala
@@ -572,6 +572,13 @@ public class Game : GLib.Object
   private void _on_show_hide_trans_stopped (bool is_finished)
   {
     debug (@"show/hide animation stopped; finished $is_finished");
+
+    if (_show_hide_trans.direction == Clutter.TimelineDirection.FORWARD) {
+      _show_hide_trans.direction = Clutter.TimelineDirection.BACKWARD;
+      _show_hide_trans.start ();
+      return;
+    }
+
     debug (@"$_grid");
 
     _show_hide_trans.remove_all ();
@@ -605,8 +612,6 @@ public class Game : GLib.Object
     _show_hide_trans = new Clutter.TransitionGroup ();
     _show_hide_trans.stopped.connect (_on_show_hide_trans_stopped);
     _show_hide_trans.set_duration (100);
-    _show_hide_trans.set_auto_reverse (true);
-    _show_hide_trans.set_repeat_count (1);
   }
 
   private void _finish_move ()