[pitivi] viewer: Redraw the current frame whenever the drawing area draws

[Thibault Saunier <tsaunier src gnome org>]

commit a0e64eff3a6b852096a6b6c29d7ad9fbbb7d36df
Author: Thibault Saunier <tsaunier gnome org>
Date:   Tue Sep 9 23:07:31 2014 +0200

    viewer: Redraw the current frame whenever the drawing area draws
    
    Avoid artefacts when we resize the drawing area.

 pitivi/viewer.py |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/pitivi/viewer.py b/pitivi/viewer.py
index dd16d0d..930dd59 100644
--- a/pitivi/viewer.py
+++ b/pitivi/viewer.py
@@ -810,6 +810,7 @@ class ViewerWidget(Gtk.AspectFrame, Loggable):
 
         self.drawing_area = Gtk.DrawingArea()
         self.drawing_area.set_double_buffered(False)
+        self.drawing_area.connect("draw", self._drawCb, None)
         # We keep the ViewerWidget hidden initially, or the desktop wallpaper
         # would show through the non-double-buffered widget!
         if realizedCb:
@@ -832,6 +833,10 @@ class ViewerWidget(Gtk.AspectFrame, Loggable):
         # for state in range(Gtk.StateType.INSENSITIVE + 1):
         # self.modify_bg(state, self.style.black)
 
+    def _drawCb(self, unused, unused1, unused2):
+        if self.sink:
+            self.sink.expose()
+
     def setDisplayAspectRatio(self, ratio):
         self.set_property("ratio", float(ratio))