Unsolved enum QGraphicsView::ViewportUpdateMode

[Qt Enthusiast]

Hi All
From the documentation , it is not clear to me what is viewport in QgraphicView and what does the enum http://doc.qt.io/qt-4.8/qgraphicsview.html#ViewportUpdateMode-enum means

[SGaist]

Hi,

The viewport is what shows the content widget. This enum allows you to fine-tune the way the it is updated.