ENH : add stale flag to Barb

tacaswell · tacaswell · commit d6b85037b5e0 · 2015-04-30T17:37:43.000-04:00
diff --git a/lib/matplotlib/quiver.py b/lib/matplotlib/quiver.py
@@ -1135,6 +1135,7 @@ def set_UVC(self, U, V, C=None):
         # Update the offsets in case the masked data changed
         xy = np.hstack((x[:, np.newaxis], y[:, np.newaxis]))
         self._offsets = xy
+        self.stale = True
 
     def set_offsets(self, xy):
         """
@@ -1150,6 +1151,8 @@ def set_offsets(self, xy):
                                           self.u, self.v)
         xy = np.hstack((x[:, np.newaxis], y[:, np.newaxis]))
         mcollections.PolyCollection.set_offsets(self, xy)
+        self.stale = True
+
     set_offsets.__doc__ = mcollections.PolyCollection.set_offsets.__doc__
 
     barbs_doc = _barbs_doc
