[Qt-interest] QPainter: It is not safe to use drawPixmap() outside the GUI thread

[Oliver.Knoll at comit.ch]

Andre Somers wrote on Thursday, October 29, 2009 8:28 AM:

> ... A frequent method of using threaded rendering is to
> paint to such QImages in threads, send them to the GUI thread when
> they are done, and have the GUI thread paint those images to it's UI.

Just for the record: the famous "Mandelbrot" example here:

  http://doc.trolltech.com/4.5/threads-mandelbrot.html

In this case it is multithreaded and I *think* (by just quickly browsing over above documentation) the worker thread paints into a QImage.

Cheers, Oliver
-- 
Oliver Knoll
Dipl. Informatik-Ing. ETH
COMIT AG - ++41 79 520 95 22