BUG: zoom outside picture

nguy · Jun 2, 2016 · ba46b52 · ba46b52
1 parent c72ed25
commit ba46b52
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/artview/components/tools.py b/artview/components/tools.py
@@ -283,6 +283,9 @@ def onZoom(self, event):
         xdata = event.xdata  # get event x location
         ydata = event.ydata  # get event y location
 
+        if (xdata is None) or (ydata is None):
+            return
+
         if event.button == 'down':
             # deal with zoom in
             scale_factor = 1 / self.base_scale