commit a249f16af03ab2091b59e12faaefe642f95a85ea
author Fredrik Lundh <fredrik@pythonware.com> Thu Sep 07 15:05:09 2000 +0000
committer Fredrik Lundh <fredrik@pythonware.com> Thu Sep 07 15:05:09 2000 +0000
tree 7415799a6a48fc9f13fce2a44675a15a016ec024
parent ebba420285990ab01973765eea03498eab170ae7

Older Tk versions don't support mousewheel support.  Set event.delta
to zero if that's the case (closes bug #113727)

Lib/lib-tk/Tkinter.py

diff --git a/Lib/lib-tk/Tkinter.py b/Lib/lib-tk/Tkinter.py
index e2f09a5..3a1d7a4 100644
--- a/Lib/lib-tk/Tkinter.py
+++ b/Lib/lib-tk/Tkinter.py
@@ -1050,7 +1050,10 @@
             e.widget = W
         e.x_root = getint(X)
         e.y_root = getint(Y)
-        e.delta = getint(D)
+        try:
+            e.delta = getint(D)
+        except ValueError:
+            e.delta = 0
         return (e,)
     def _report_exception(self):
         """Internal function."""