A simple excample:

A QlineEdit's lostFocus()-signal is connected to a slot in my class, who inherits QWidget.
The QLineEdit resides inside the same class.

While debugging my system, I experience that the slot is executed 3 times when the lineEdit looses focus. I would expect it to be called only ones.

I wonder if this has something to do with Qt's eventhandling? If so, how does this work?

I hope somebody can explaine this to me.