[3092255] Fix the direction of scroll event in Tk backend to match other backends.

mdboom · mdboom · commit feb143a97b0f · 2010-10-22T15:00:31.000Z
svn path=/branches/v1_0_maint/; revision=8758
diff --git a/lib/matplotlib/backends/backend_tkagg.py b/lib/matplotlib/backends/backend_tkagg.py
@@ -312,8 +312,8 @@ def scroll_event(self, event):
         x = event.x
         y = self.figure.bbox.height - event.y
         num = getattr(event, 'num', None)
-        if   num==4: step = -1
-        elif num==5: step = +1
+        if   num==4: step = +1
+        elif num==5: step = -1
         else:        step =  0
 
         FigureCanvasBase.scroll_event(self, x, y, step, guiEvent=event)
