[PyQt] Drawing on desktop (root window) under X11

[Maurizio Berti]

The Qt documentation ( https://doc.qt.io/qt-5/qapplication.html#desktop )
says this about QDesktopWidget:

On X11, it is also possible to draw on the desktop.


However, I've not been able to understand how this can be done.
I found a very old C++ example (
https://doc.qt.io/archives/3.3/desktop-example.html ) but I couldn't port
it.
Installing an eventFilter on the returned QDesktopWidget won't get any
QPaintEvent (only PolishRequest and Polish events), and subclassing
QApplication to return a subclassed QDesktopWidget won't do anything too.

Does anybody know anything about this?

Thanks,
Maurizio

-- 
È difficile avere una convinzione precisa quando si parla delle ragioni del
cuore. - "Sostiene Pereira", Antonio Tabucchi
http://www.jidesk.net
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