[pitivi] timeline: Do not show keyframes while playing

[Thibault Saunier <tsaunier src gnome org>]

commit b339056076360bd28eb4976270c18cb9be7e07b3
Author: Thibault Saunier <tsaunier gnome org>
Date:   Tue Nov 3 11:47:11 2015 +0100

    timeline: Do not show keyframes while playing
    
    Fixes T3348
    
    Differential Revision: https://phabricator.freedesktop.org/D484
    Reviewed-by: Alex Băluț <alexandru balut gmail com>

 pitivi/timeline/elements.py |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/pitivi/timeline/elements.py b/pitivi/timeline/elements.py
index bfb17c8..8aa2579 100644
--- a/pitivi/timeline/elements.py
+++ b/pitivi/timeline/elements.py
@@ -416,6 +416,9 @@ class TimelineElement(Gtk.Layout, timelineUtils.Zoomable, Loggable):
         Gtk.Layout.do_set_property(self, property_id, value, pspec)
 
     def __showKeyframes(self):
+        if self.timeline.app.project_manager.current_project.pipeline.getState() == Gst.State.PLAYING:
+            return False
+
         if not self.__keyframeCurve:
             return False