ENH : add stale flag to Legend

tacaswell · tacaswell · commit 006548690b75 · 2015-05-01T21:52:41.000-04:00
diff --git a/lib/matplotlib/legend.py b/lib/matplotlib/legend.py
@@ -421,6 +421,7 @@ def _set_loc(self, loc):
         self._legend_box.set_offset(_findoffset)
 
         self._loc_real = loc
+        self.stale = True
 
     def _get_loc(self):
         return self._loc_real
@@ -481,6 +482,7 @@ def draw(self, renderer):
         self._legend_box.draw(renderer)
 
         renderer.close_group('legend')
+        self.stale = False
 
     def _approx_text_height(self, renderer=None):
         """
@@ -807,6 +809,7 @@ def set_title(self, title, prop=None):
             self._legend_title_box.set_visible(True)
         else:
             self._legend_title_box.set_visible(False)
+        self.stale = True
 
     def get_title(self):
         'return Text instance for the legend title'
@@ -829,6 +832,7 @@ def set_frame_on(self, b):
         ACCEPTS: [ *True* | *False* ]
         """
         self._drawFrame = b
+        self.stale = True
 
     def get_bbox_to_anchor(self):
         """
@@ -869,6 +873,7 @@ def set_bbox_to_anchor(self, bbox, transform=None):
 
         self._bbox_to_anchor = TransformedBbox(self._bbox_to_anchor,
                                                transform)
+        self.stale = True
 
     def _get_anchored_bbox(self, loc, bbox, parentbbox, renderer):
         """
