[pitivi] Make moving a clip in the timeline undoable.

[Edward Hervey <edwardrv src gnome org>]

commit 8a23c5f4de083dc08bda293f854fce6926db6fe6
Author: Alessandro Decina <alessandro d gmail com>
Date:   Wed Jun 10 13:40:27 2009 +0200

    Make moving a clip in the timeline undoable.

 pitivi/ui/trackobject.py |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/pitivi/ui/trackobject.py b/pitivi/ui/trackobject.py
index 5600ee8..95ccfd3 100644
--- a/pitivi/ui/trackobject.py
+++ b/pitivi/ui/trackobject.py
@@ -160,6 +160,7 @@ class TrackObject(View, goocanvas.Group, Zoomable):
 
         def drag_start(self):
             TimelineController.drag_start(self)
+            self._view.app.action_log.begin("move clip")
             self._view.timeline.disableUpdates()
             self._view.raise_(None)
             tx = self._view.props.parent.get_transform()
@@ -185,6 +186,7 @@ class TrackObject(View, goocanvas.Group, Zoomable):
         def drag_end(self):
             TimelineController.drag_end(self)
             self._view.timeline.enableUpdates()
+            self._view.app.action_log.commit()
 
         def click(self, pos):
             mode = SELECT