From 72292f73c0a77a4489b9889f86b8e32d4270cb30 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steven.silvester@ieee.org>
Date: Sat, 11 Oct 2014 09:15:10 -0500
Subject: [PATCH] Use a manual hack to remove the canvas events for old MPL

---
 skimage/viewer/canvastools/recttool.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/skimage/viewer/canvastools/recttool.py b/skimage/viewer/canvastools/recttool.py
index fcd10aca..ce81c38d 100644
--- a/skimage/viewer/canvastools/recttool.py
+++ b/skimage/viewer/canvastools/recttool.py
@@ -51,8 +51,11 @@ class RectangleTool(CanvasToolBase, RectangleSelector):
         RectangleSelector.__init__(self, self.ax, lambda *args: None,
                                    rectprops=props)
         # Events are handled by the viewer
-        for c in self.cids:
-            self.canvas.mpl_disconnect(c)
+        try:
+            self.disconnect_events()
+        except AttributeError:
+            # disconnect the events manually (hack for older mpl verions)
+            [self.canvas.mpl_disconnect(i) for i in range(5)]
 
         # Alias rectangle attribute, which is initialized in RectangleSelector.
         self._rect = self.to_draw