[pitivi] If the sink has a double-buffer property set that to False.

[Edward Hervey <edwardrv src gnome org>]

commit b67e6d3ce086f2bb93d05a9ae9f9b407fb0a20ce
Author: Alessandro Decina <alessandro d gmail com>
Date:   Mon Sep 7 18:14:03 2009 +0200

    If the sink has a double-buffer property set that to False.

 pitivi/plumber.py   |   11 +++++++++--
 pitivi/ui/viewer.py |    1 -
 2 files changed, 9 insertions(+), 3 deletions(-)
---
diff --git a/pitivi/plumber.py b/pitivi/plumber.py
index aa37a51..6589a66 100644
--- a/pitivi/plumber.py
+++ b/pitivi/plumber.py
@@ -80,8 +80,15 @@ class DefaultVideoSink(SinkFactory):
 
         if self._realsink:
             props = list(self._realsink.props)
-            if "force-aspect-ratio"in [prop.name for prop in props]:
-                self._realsink.set_property("force-aspect-ratio", True)
+            try:
+                self._realsink.props.force_aspect_ratio = True
+            except AttributeError:
+                pass
+
+            try:
+                self._realsink.props.double_buffer = False
+            except AttributeError:
+                pass
 
             self._realsink.props.sync = self.sync
             self._realsink.props.qos = self.sync
diff --git a/pitivi/ui/viewer.py b/pitivi/ui/viewer.py
index 3043eeb..b1c3783 100644
--- a/pitivi/ui/viewer.py
+++ b/pitivi/ui/viewer.py
@@ -454,7 +454,6 @@ class ViewerWidget(gtk.DrawingArea, Loggable):
         Loggable.__init__(self)
         self.action = action # FIXME : Check if it's a view action
         self.unset_flags(gtk.SENSITIVE)
-        self.unset_flags(gtk.DOUBLE_BUFFERED)
         for state in range(gtk.STATE_INSENSITIVE + 1):
             self.modify_bg(state, self.style.black)