Cannot receive mouse event when using touch panel

kingkong

OS: RPI 4 bullseye
QT version: 5.15.2
Touch panel: https://www.waveshare.com/wiki/5inch_DSI_LCD

Hello everybody, I'm a noob of QT.
I try to implement a function to let the image label be full screen by double click.

The function can work when using mouse.
Using touch panel, the lable first state is normal size, and do "normal size->full screen-> normal size" is ok.
But after back to normal size, the application cannot receive the mouse event anymore.

Code:
https://github.com/mmarktsai/pyqt_photo_viewer

Any help is very appreciate!

SGaist

Hi and welcome to devnet,

You should avoid replacing objects method like that with a method from a different class. Use proper overloading to keep things clean. You should also avoid replacing self by something else. That is making your code confusing at best.

kingkong

@SGaist

Thanks for your suggestion! I've modified it.

Do you have any idea to fix the problem about missing mouse event with touch panel?

SGaist

Does it show other signs of misbehavior ?

kingkong

I use eventfilter to dump all events.
There are touch events at first.
After I let the image label be full screen and back to normal size, the touch event cannot get anymore.
But the mouse events can still work.

SGaist

Does it affect only your application ?

kingkong

Yes, only the application cannot get any mouse event.
The RPI desktop still can work.

SGaist

What happens if you switch to another one and then come back to it ?

kingkong

If I switch to another window and back to my window, my window still cannot work correctly.

https://drive.google.com/file/d/1H0MAkPo4HQB5sBBZ1_FhkshPtRSSD7Wf/view?usp=sharing

SGaist

I would install a native event filter to see if there's something coming but not processed.