uLaunch | source qlaunch ( Nintendo Switch HOME menu

I am creating a launcher, in the style of Albert, Alfred or uLauncher. My application runs in the background and shows up when a hotkey is pressed. I use pynput to listen to hotkeys. I cannot use PyQt5 hotkey's feature (can't I?) because I need to listen to keyboard events in the system scope, not only the application's scope.

When the shortcut is pressed, it calls the show() method of my widget. The only issue is that I can't get the focus back on my window, despite the use of raise_, setFocus and activateWindow.

I found a (ugly) workaround that consists in openning a QMessageBox (+ tweaking its appearance to make it invisible, but I didn't put that in the example code) and closing it immediately after.

When I was working on Linux, that workaround was doing the job, and I was ready to forget how ugly it is for it does the job. But I switched to Windows (on which my app must run too), and now this cheeky trick seems to cause freeze then crash of my application. Karma? For sure.

Any ways, my application is useless if it cannot catch focus, so I'm asking two questions, and I'd be happy with only one being solved. :)

• Do you know why showing the QMessageBox causes a crash?
• Do you know any other way to get the focus back on my application?

Here is an example code to play with.

Thank you very much :)

EDIT: I just found out that even with deactivating the QMessageBox workaround, the application eventually crashes (after 5, 20, 30 calls of the hotkey). So the issue might as well be in the way I bind my shortcut to the GUI, I fear a thread issue, but this is way beyond my knowledge :/