[Pythonmac-SIG] Tkinter bug

[mark brady]

There seems to be bug in Tkinter regarding canvas cursor locations.
The following code prints the cursor location when the mouse is
clicked in a scrollable canvas which is in a frame:

       def drawCallback(event):
          
           canvas = event.widget
           x = canvas.canvasx(event.x)
           y = canvas.canvasy(event.y)
           print "clicked at", int(x+.5), int(y+.5)

Before scrolling there seems to be an offset of about 4 form the actual
canvas location.  Maybe the frame location is being used.  I suspect this
because there is a blank border of about 4 pixels between the frame and
the canvas.

After scrolling, the error goes away.

-Mark