Canvas Mouse event

Hi, im a total newbie to QT.  Trying to pick up how to capture
mouse events located in a Q3Canvas (or any canvas at this point).
Ive been reading that QWidgets can catch mouse events, but
can Canvas class do so also?  If so how?

Im assuming I need to setup a QEvent and somehow use connect(),
but not sure how, if at all.

Thank you for your help.