how to Fit QGraphicsScene in a QGraphicsView

Question

I want to to fit a QGraphicsScene in a QGraphicsView with different dimensions, such that it will shrink or expand according to size of view, and there should be no any scrollbar.

Answer 1

This worked for me:

void MyGraphicsView::zoomToFit()
{
    fitInView(scene()->sceneRect(), Qt::KeepAspectRatio);
}

You might want to adjust the scene rectangle to have a little margin; might look better, depending on your content.

Answer 2

scaling the view like bellow doing what required:

view->scale(frameWidth / sceneWidth, frameHeight / sceneHeight);