QScrollView and repaint

[munna]

In the constructor I have :

viewport()->setBackgroundMode( Qt::NoBackground );	viewport()->setFocusPolicy(QWidget::StrongFocus);

viewport()->setBackgroundMode( Qt::NoBackground );	viewport()->setFocusPolicy(QWidget::StrongFocus);

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Apart from the above two lines, I dont do much with the viewport. I only use resizeContents according to the size of my drawing and then call repaint().

Can you please explain this a little more? All this while I thought I was doing the write thing.

Thanks a lot