change bounding of QGraphicsScene

[wysota]

my goals?
so, loading a large svg file and creating some special map viewer for this file,

We won't make progress this way, you know...

But let's have it your way...

-how can i draw a svg file in background of a QGraphicsScene that cover whole scene?

For example using QGraphicsScene::drawBackground()

-- when scaling a scene my background must scale too?

It can, it doesn't have to.