How to grab screen on thread?

[Alex Snet]

Hi!

I know how to grab screen in GUI thread:

QPixmap::grabWindow( QApplication::desktop()->winId() );

QPixmap::grabWindow( QApplication::desktop()->winId() );

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But how to grab the screen in another thread?
If I do it how i write before application returns this:

QPixmap: It is not safe to use pixmaps outside the GUI thread