[Tkinter-discuss] window flashes rapidly

[Lynn Oliver]

I'm not sure whether to describe this as a flicker or rapid flashing; probably what is happening is that the window is being redrawn continuously as fast as possible.  The visual effect is like a fast strobe.

I don't explicitly use any pack() methods at all, but I'll take a look and see if that's a possibility.

Lynn

On May 1, 2012, at 7:42 PM, Emiliano Gavilan wrote:

> 2012/5/1 Lynn Oliver <raycores at gmail.com>:
>> I'm using python 2.7.2 with Tcl/Tk 8.5.11, and I'm using a lot of ttk themed widgets in the UI.  The layout is a ttk.notebook with a number of frames per tab; some tabs have frames that are created/destroyed based on user selections.
>> 
>> Occasionally when I execute the program, either within the debugger or by itself, the entire window flashes rapidly and continues until I terminate the script.   I had noticed that certain dimensions in the frames that are dynamically replaced caused the flashing whenever I caused the frames to change, and by making small adjustments it seemed that I had eliminated the problem.
>> 
>> However it still happens occasionally--but not repeatably on my system--and now I've gotten a report from a tester that it flashes on his system when he hasn't done anything that causes frames to be created.  As soon as he clicks on a certain button widget the entire UI starts flashing.  The same scenario doesn't cause it to flash on my system.
>> 
>> Does anyone know what causes this?  Any suggestions for tracking down and eliminating the problem?
> 
> I don't know what you mean by "flashing". If you mean that the main
> window geometry adjusts continouosly
> then probably you are mixing pack() and grid() methods on the same
> master widget.
> 
> Regards
> Emiliano