Terminating process after closing QWidget

[anda_skoa]

Ah so a QTimer can't do anything without an event loop?

Exactly.

But is there any difference between the main event loop (application.exec()) and QDialogs event loop?

No. The dialog's event loop is a "nested event loop", it will temporarily be in control of processing events its "parent" eventloop would otherwise process.
In this case the parent loop is the main loop.

I found out that QTimer is not interested in it, it just starts when any event loop starts...

Indeed.

Cheers,
_