Merge pull request #20264 from ericpre/fix_blitting_selector

jklymak · web-flow · commit 762666f87332 · 2021-05-20T09:42:05.000-07:00
Fix blitting selector
diff --git a/lib/matplotlib/widgets.py b/lib/matplotlib/widgets.py
@@ -1737,7 +1737,8 @@ def update_background(self, event):
                 self.canvas.draw()
             self.background = self.canvas.copy_from_bbox(self.ax.bbox)
         if needs_redraw:
-            self.update()
+            for artist in self.artists:
+                self.ax.draw_artist(artist)
 
     def connect_default_events(self):
         """Connect the major canvas events to methods."""
@@ -1781,6 +1782,8 @@ def update(self):
         if self.useblit:
             if self.background is not None:
                 self.canvas.restore_region(self.background)
+            else:
+                self.update_background(None)
             for artist in self.artists:
                 self.ax.draw_artist(artist)
             self.canvas.blit(self.ax.bbox)
