[pitivi] Add object-added and object-removed signals to Timeline.

[Edward Hervey <edwardrv src gnome org>]

commit 3ee6a217483287ffb59e92dd93b20efeae95c40b
Author: Alessandro Decina <alessandro d gmail com>
Date:   Wed Jun 10 13:37:06 2009 +0200

    Add object-added and object-removed signals to Timeline.

 pitivi/timeline/timeline.py |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/pitivi/timeline/timeline.py b/pitivi/timeline/timeline.py
index 56d1daf..34b89d4 100644
--- a/pitivi/timeline/timeline.py
+++ b/pitivi/timeline/timeline.py
@@ -763,6 +763,8 @@ class Timeline(Signallable, Loggable):
     """
     __signals__ = {
         'duration-changed': ['duration'],
+        'object-added': ['timeline_object'],
+        'object-removed': ['timeline_object'],
         'track-added': ['track'],
         'track-removed': ['track'],
         'selection-changed': [],
@@ -856,6 +858,8 @@ class Timeline(Signallable, Loggable):
 
         self.edges.addTimelineObject(obj)
 
+        self.emit("object-added", obj)
+
     def removeTimelineObject(self, obj, deep=False):
         """
         Remove the given object from the Timeline.
@@ -883,6 +887,8 @@ class Timeline(Signallable, Loggable):
                 track = track_object.track
                 track.removeTrackObject(track_object)
 
+        self.emit("object-removed", obj)
+
     # FIXME : shouldn't this be made more generic (i.e. not specific to source facotires) ?
     def addSourceFactory(self, factory, stream_map=None, strict=False):
         """