[Interest] Unnecessary repaints.

[william.crocker at analog.com]

>>
>> Or, can you recommend a better way to diagnose
>> this problem. (The whole thing needs to be rewritten
>> now that I am older and wiser, but not just yet.)
>>
> I'd try to log calls to update() on the widget, and dump the stacktrack for each
> of those to a file. You can do that (at least on gdb) by setting a breakpoint on
> it with some commands to run on the breakpoint, after wich you immediately
> resume. If you really break, it will be much harder to trace as returning to the
> running application afterwards will itself cause a repaint. Run your app for a
> bit, and inspect the file to see how your update got called.
>

There are multiple widgets involved
and my app contains 168 calls to update().

:-)

> André
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