QGraphicsView framework performance

[wysota]

It's hard to help without knowing details about your scene. If animating items cover a relatively small portion of the view then I'd disable full viewport update. If "static" items are indeed static and not interactive, I'd replace them with drawBackground. If the scene is not interactive, I'd disable interactivity on the view. I'd also enable caching for the items. That's something to start experimenting with.

[saifulkhan]

Thanks for this nice tricks. Is there any way to set those static custom QGraphicsItems as a background of the view? Currently I add these static items in the same scene where I add those animated items. But for time being I can afford to remove interaction from the static items, though ideally its not the case.

I have added the following:

view->setViewportUpdateMode( QGraphicsView::MinimalViewportUpdate );

Enable item caching: setCacheMode( QGraphicsItem :: DeviceCoordinateCache, bound.size().toSize() );

[wysota]

Is there any way to set those static custom QGraphicsItems as a background of the view?

You'd have to draw them yourself. If that's too complex for you then at least enable caching for them.