want to draw points in QGraphicsScene

[jacek]

You can draw small circles instead of points or you can create a custom item that represents a set of points.

[aamer4yu]

If ur points are constant, u can draw them in background or foreground

These might help you -

QGraphicsScene::drawForeground ( QPainter * painter, const QRectF & rect )
QGraphicsScene::drawBackground ( QPainter * painter, const QRectF & rect )