[pitivi] curve.py: unset focused keyframe if this keyframe is removed

[Edward Hervey <edwardrv src gnome org>]

commit 15b8c60071b28bd0ad3a87b262d3b7757c2a1f40
Author: Brandon Lewis <brandon_lewis berkeley edu>
Date:   Mon Aug 17 13:55:58 2009 -0700

    curve.py: unset focused keyframe if this keyframe is removed

 pitivi/ui/curve.py |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/pitivi/ui/curve.py b/pitivi/ui/curve.py
index a1d90e9..6a7f173 100644
--- a/pitivi/ui/curve.py
+++ b/pitivi/ui/curve.py
@@ -127,6 +127,7 @@ class Curve(goocanvas.ItemSimple, goocanvas.Item, View, Zoomable):
         self.element = element
         self.props.pointer_events = goocanvas.EVENTS_STROKE
         self.interpolator = interpolator
+        self._focused_kf = None
         self.normal()
 
 ## properties
@@ -160,6 +161,8 @@ class Curve(goocanvas.ItemSimple, goocanvas.Item, View, Zoomable):
     def keyframeRemoved(self, unused_interpolator, keyframe):
         if keyframe in self.keyframes:
             del self.keyframes[keyframe]
+            if keyframe is self._focused_kf:
+                self._focused_kf = None
         self.changed(False)
 
     @handler(interpolator, "keyframe-added")