taking into account possible None values of x and y

TarasKuzyo · TarasKuzyo · commit a20f6e1b51fa · 2018-06-29T09:48:54.000+03:00
diff --git a/lib/matplotlib/backend_bases.py b/lib/matplotlib/backend_bases.py
@@ -1342,10 +1342,10 @@ class LocationEvent(Event):
 
     Attributes
     ----------
-    x : scalar
+    x : int
         x position - pixels from left of canvas
 
-    y : scalar
+    y : int
         y position - pixels from bottom of canvas
 
     inaxes : bool
@@ -1365,8 +1365,8 @@ def __init__(self, name, canvas, x, y, guiEvent=None):
         *x*, *y* in figure coords, 0,0 = bottom, left
         """
         Event.__init__(self, name, canvas, guiEvent=guiEvent)
-        self.x = int(x)          # x position - pixels from left of canvas
-        self.y = int(y)          # y position - pixels from right of canvas
+        self.x = int(x) if x is not None else 0   # x position - pixels from left of canvas
+        self.y = int(y) if y is not None else 0   # y position - pixels from right of canvas
         self.inaxes = None  # the Axes instance if mouse us over axes
         self.xdata = None   # x coord of mouse in data coords
         self.ydata = None   # y coord of mouse in data coords
