[pitivi] keyframes: stop motion-notify-event propagation

[Thibault Saunier <tsaunier src gnome org>]

commit 32257122bc05fbc467f69c1caf7d9a21e91f29a5
Author: Mathieu Duponchelle <mathieu duponchelle opencreed com>
Date:   Wed Apr 22 15:11:23 2015 +0200

    keyframes: stop motion-notify-event propagation
    
    ... at the right moment

 pitivi/timeline/elements.py |   17 ++++++++++++-----
 1 files changed, 12 insertions(+), 5 deletions(-)
---
diff --git a/pitivi/timeline/elements.py b/pitivi/timeline/elements.py
index 62e699f..6dd1e20 100644
--- a/pitivi/timeline/elements.py
+++ b/pitivi/timeline/elements.py
@@ -113,6 +113,8 @@ class KeyframeCurve(FigureCanvas, Loggable):
         self.__dragged = False
         self.__offset = None
         self.__handling_motion = False
+
+        self.connect("motion-notify-event", self.__gtkMotionEventCb)
         self.connect("event", self._eventCb)
 
         self.mpl_connect('button_press_event', self.__mplButtonPressEventCb)
@@ -146,15 +148,20 @@ class KeyframeCurve(FigureCanvas, Loggable):
             self.__updatePlots()
 
     # Callbacks
+
+    def __gtkMotionEventCb(self, widget, event):
+        """
+        We need to do that here, because mpl's callbacks can't stop
+        signal propagation.
+        """
+        if self.__handling_motion:
+            return True
+        return False
+
     def _eventCb(self, element, event):
         if event.type == Gdk.EventType.LEAVE_NOTIFY:
             cursor = NORMAL_CURSOR
             self.__timeline.get_window().set_cursor(cursor)
-        elif event.type == Gdk.EventType.MOTION_NOTIFY:
-            # We need to do that here, because mpl's callbacks can't stop
-            # signal propagation.
-            if self.__handling_motion:
-                return True
         return False
 
     def __mplButtonPressEventCb(self, event):