[Qt-interest] Can an Qt Application contain 2 mainwindow?

[Till Oliver Knoll]

[3rd attempt to get the recipient right... *sigh*]

Am 22.09.2011 um 11:46 schrieb Vincent Cai <wcai at cypress.com>:
> The error happens when I try to new b window in other thread.
> 

Meeep! Bummer! ;) A classic one I'd say ;)

You can only create or modify widgets in the "main" (aka "GUI") thread - the thread where QApplication "lives in", to be specific (which usually happens to be the thread which the OS starts for you when calling your entry main() function, since that is the place where one usually instantiates QApplication).

Check the Qt thread docs again, specifically the chapter about "painting and threads".

Cheers, Oliver
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