poly_editor: if the last vertex is moved, also move the first vertex as they overlap

Will Silva · Will Silva · commit 96bac8963792 · 2016-10-26T14:52:10.000-07:00
* this case is likely to not occur since it seems that the first vertex handle is rendered over the last vertex handle
diff --git a/examples/event_handling/poly_editor.py b/examples/event_handling/poly_editor.py
@@ -143,6 +143,8 @@ def motion_notify_callback(self, event):
         self.poly.xy[self._ind] = x, y
         if self._ind == 0:
             self.poly.xy[-1] = x, y
+        elif self._ind == len(self.poly.xy) - 1:
+            self.poly.xy[0] = x, y
         self.line.set_data(zip(*self.poly.xy))
 
         self.canvas.restore_region(self.background)
