the task of redrawing a window when it is revealed is down to the window manager, not the application
When Firefox freezes (happens to me sometimes when running adobe flash plugin), its window becomes completely gray. I can switch to other applications, but Firefox does not update its windows. I fear you are not right here.
لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re^5: Perl/Tk window contents disappear when obscured then revealed by choroba
in thread Perl/Tk window contents disappear when obscured then revealed by Another Ed

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