Fix order of execution in paintEvent

astrofrog · astrofrog · commit 6b159846fdae · 2017-07-25T09:48:09.000+01:00
diff --git a/lib/matplotlib/backends/backend_qt5agg.py b/lib/matplotlib/backends/backend_qt5agg.py
@@ -66,6 +66,11 @@ def paintEvent(self, e):
         shown onscreen.
         """
 
+        # if the canvas does not have a renderer, then give up and wait for
+        # FigureCanvasAgg.draw(self) to be called
+        if not hasattr(self, 'renderer'):
+            return
+
         # As described in __init__ above, we need to be careful in cases with
         # mixed resolution displays if dpi_ratio is changing between painting
         # events.
@@ -83,11 +88,6 @@ def paintEvent(self, e):
             self.resizeEvent(event)
             self._dpi_ratio_prev = self._dpi_ratio
 
-        # if the canvas does not have a renderer, then give up and wait for
-        # FigureCanvasAgg.draw(self) to be called
-        if not hasattr(self, 'renderer'):
-            return
-
         painter = QtGui.QPainter(self)
 
         if self._bbox_queue:
