linux - QWidget / X11: Prevent window from beeing activated/focussed by mouse clicks -

I would like to develop a system-word on-screen keyboard in QT / QML, injection of important events through Xlib works fine

My problem now: If a keyboard-button is clicked, the window will lose focus with the selected input field. As a result, the major events will not be delivered on the already selected input field.

Does anybody know that with mouse click active / focusing to stop QWidget from beating? Every signal is welcome and a code example would be great!

Thank you very much in advance, frime