Strange mouseReleaseEvent behaviour.

[ricardo]

your code will work in this case, i.e. if you pressed two or more mouse buttons then QMouseEvent::buttons will retrun all pressed buttons, that's why this function doesn't work for one button.

Wait. Still don't understand.
Which case? Mine or Spirit?

if I press two buttons at the same time, and I release them at the same time, how many event would I receive? 1 or 2?

I think moving the mouse I will receive only 1, so I have to use:
(event->buttons() & Qt::LeftButton) and (event->buttons() & Qt::RightButton)

But not on release and press, as I guess I will only receive 1. So I have to use:
(event->button() == Qt::LeftButton) or (event->button() == Qt::RightButton)

Am I right?

Thanks a lot for your help and time.