I have created a GUI using the Tk "canvas" widget that contains a menu list with two mutually exclusive menu items - say "A" and "B". When "A" is selected, "B" should be disabled (greyed out) and vice versa. Therefore, when the currently active option is selected, the menu list needs to be repainted switching the active and disabled items. However, the first time that this happens, the height of the canvas window shrinks - by about the height of the menu tab. The height of the window remains unchanged for all subsequent menu actions. I have printed out the variable containing the nominated height of the window before and after making the selection and it does not change. I can compensate for this action by making the original window height slightly larger in the first place. However, I would rather that the shrinkage did not happen at all. Has anyone seen this happen for themselves and does anyone know how to prevent the window from shrinking in the first place?
Any suggestions would be most welcome. Many thanks Geoff
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