[PyQt] Screenshot with no show

David Boddie david at boddie.org.uk
Tue Jun 21 19:16:24 BST 2011

On Tue Jun 21 10:40:56 BST 2011, Mads Ipsen wrote:

> I have a GLWidget (OpenGL) based window which is used for displaying
> chemical structures. I would like to use this window to generate
> thumbnails used as icons for the files containing the chemical structures.
> I would like to hide this process of icon generation from the user, so
> is there any way that you can
>     * Show/display a GLWidget/QWidget in some sort of virtual frame
>       buffer, in such a way that is does NOT appear visual to the user.
>     * Dump the contents of the invisible window into a pixmap.

You probably want to look at the QGLPixelBuffer class and the associated
example (which is only available in C++...) for inspiration:



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