How to draw something in widget(qt?

QT: Have parent Widget class draw something in addition to the child class widget

• More and more this seems like a philosophical QT question: I have a widget representing a window A I have a widget representing a window, deriving from A, called B B draws its stuff, but I want "A" to contribute some drawing, e.g. draw an image OVER what "B" draws. I want "B" to be completely unaware of this, not having to cooperate with "A" other than deriving from it. Is that possible?

• Answer:

  Override http://doc.trolltech.com/latest/qwidget.html#event in A: bool A::event ( QEvent * e) { bool handled = QWidget::event(e); if(e->type() == QEvent::Paint) { // cast e to QPaintEvent and do the overlay painting } return handled; }