Merge pull request #17268 from meeseeksmachine/auto-backport-of-pr-17261-on-v3.2.x

QuLogic · web-flow · commit 723d216c31a1 · 2020-04-29T22:39:35.000-04:00
Backport PR #17261 on branch v3.2.x (avoid calling wx.Bitmap() if width or height is zero)
diff --git a/lib/matplotlib/backends/backend_wx.py b/lib/matplotlib/backends/backend_wx.py
@@ -776,14 +776,14 @@ def _onSize(self, evt):
                 # no change in size
                 return
         self._width, self._height = size
-        # Create a new, correctly sized bitmap
-        self.bitmap = wx.Bitmap(self._width, self._height)
-
         self._isDrawn = False
 
         if self._width <= 1 or self._height <= 1:
             return  # Empty figure
 
+        # Create a new, correctly sized bitmap
+        self.bitmap = wx.Bitmap(self._width, self._height)
+
         dpival = self.figure.dpi
         winch = self._width / dpival
         hinch = self._height / dpival
