Fix bug where using zoom tool on polar plot prevents it from panning subsequently

mdboom · mdboom · commit 30ac5e52f6e7 · 2010-11-08T16:33:23.000Z
svn path=/branches/v1_0_maint/; revision=8778
diff --git a/lib/matplotlib/backend_bases.py b/lib/matplotlib/backend_bases.py
@@ -2310,7 +2310,7 @@ def __init__(self, canvas):
         self._init_toolbar()
         self._idDrag=self.canvas.mpl_connect('motion_notify_event', self.mouse_move)
 
-        self._ids_zoom = None
+        self._ids_zoom = []
         self._zoom_mode = None
 
         self._button_pressed = None # determined by the button pressed at start
@@ -2576,10 +2576,11 @@ def drag_zoom(self, event):
 
     def release_zoom(self, event):
         'the release mouse button callback in zoom to rect mode'
-        if not self._xypress: return
-
         for zoom_id in self._ids_zoom:
             self.canvas.mpl_disconnect(zoom_id)
+        self._ids_zoom = []
+
+        if not self._xypress: return
 
         last_a = []
 
