Drawing polygon using event filter in Qt

[benz6699]

You are drawing on "this". Is "this" an object of a class that is a QPaintDevice?

Any specific reason for the event filter hack instead of implementing the event handling in the scene?

Cheers,
_

"this" is "class QTGraphicsShape : public QMainWindow"

The reason I use event filter is that my drawing feature is only activated when I click certain button. Is it unnecessary in this case?