Qt in other class

[fullmetalcoder]

But the thing is, I don't want to give up the controll to QApplication::exec(). I can't run it and get back to the other code I was running before that? That is the problem.

Don't let the number of questions fool you. It might be a sign of a REAL newbee.

Just do it!
Basically, the whole QtCore module is accessible (containers and so on) without any need of QApplication::exec() but if you want piece of GUI you'll need to give up the control and rely on the event loop...

[wysota]

If you want to run some code in parallel to operating on a GUI, you might consider running it in a separate thread or as a timeout slot for a QTimer object.