How to Disable Scroll Bar of QGraphicsView (or QWidget) ??

[jiapei100]

Hi, all:

I successfully load an image in QGraphicsView.
However, I'd love to show it without scrolling bar because I can ensure the size of the image is just equal to the size of the Widget view (I'm using the widget QGraphicsView).

But, it seems whenever I tried to load an image, the scroll bar will automatically jump out to show "I(the scroll bar )'m here". How can I disable this scroll bar?

BTW:
An image is attached and the red curves show the scroll bar which is not what I expected.
Before I load an image (or image sequence), there is no such kind of bar.



Best Regards
JIA Pei