MNT: when blitting in make artist animated

tacaswell · tacaswell · commit c75f75dc4f05 · 2015-08-13T21:42:37.000-04:00
When using blitting in animation make sure to set the blitted artsts as
animated so that changing their state does not trigger the normal stale
-&gt; draw_idle cascade.
diff --git a/lib/matplotlib/animation.py b/lib/matplotlib/animation.py
@@ -1094,6 +1094,8 @@ def _init_draw(self):
             self._draw_frame(next(self.new_frame_seq()))
         else:
             self._drawn_artists = self._init_func()
+            for a in self._drawn_artists:
+                a.set_animated(True)
 
     def _draw_frame(self, framedata):
         # Save the data for potential saving of movies.
@@ -1106,3 +1108,5 @@ def _draw_frame(self, framedata):
         # Call the func with framedata and args. If blitting is desired,
         # func needs to return a sequence of any artists that were modified.
         self._drawn_artists = self._func(framedata, *self._args)
+        for a in self._drawn_artists:
+            a.set_animated(True)
