[pitivi] timeline.track: add Interpolator.getInteriorKeyframes(), and TrackObject.getInterpolator() methods

[Edward Hervey <edwardrv src gnome org>]

commit 2b9328b1a8209a019cc444a3021fa73f8ae0b016
Author: Brandon Lewis <brandon_lewis berkeley edu>
Date:   Wed Jun 24 23:26:39 2009 -0700

    timeline.track: add Interpolator.getInteriorKeyframes(), and TrackObject.getInterpolator() methods

 pitivi/timeline/track.py |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)
---
diff --git a/pitivi/timeline/track.py b/pitivi/timeline/track.py
index 8d66148..7669634 100644
--- a/pitivi/timeline/track.py
+++ b/pitivi/timeline/track.py
@@ -240,6 +240,11 @@ class Interpolator(Signallable, Loggable):
             yield kf
         yield self.end
 
+    def getInteriorKeyframes(self):
+        """Same as above but does not include start, or end points"""
+        for kf in sorted(self._keyframes):
+            yield kf
+
     keyframes = property(getKeyframes)
 
 class TrackObject(Signallable, Loggable):
@@ -297,6 +302,12 @@ class TrackObject(Signallable, Loggable):
                 if prop.name in wprops:
                     self.interpolators[prop] = Interpolator(self, sobj, prop)
 
+    def getInterpolator(self, property_name):
+        for prop, interpolator in self.interpolators.iteritems():
+            if property_name == prop.name:
+                return interpolator
+        return None
+
     def release(self):
         self._disconnectFromSignals()
         self.releaseBin()