QGraphicsView pan

[Talei]

Hello,
Any idea how to pan viewport regardless of scene size?

What I want is to pan around scene ignoring scene "size". So that way I could pan for example to left few hundreds unit.

Regards

PS: What I want to achieve is similar to the functionality of setDragMode(ScrollHandDrag); but with arbitrary view transformation (scene rect smaller then view one).

[anda_skoa]

Doesn't QGraphicsView::translate() do that?

Cheers,
_

[Talei]

I'm already using translate and no it does not do what I want.

With translate it moves scene inside sceneRect().
Scene do expand when new items are created to accommodate them, but what I want is to move in "infinite scape" so the sceneRect() is not taken into accound while moving in pan mode.

Example:
Scene rect is i.e. 800x800 I do pan to position -1600 units and create item. Item is created on mouse position with will be offset by pan position, i.e. -1600 + mapToScene(cursorpos).
But now I cant move with translate to -1600 units.

Another problem is that I do define size of the scene to view rect, because without this when I do create item near edge then scene center moves to item center.

So bottom line is that I would like to freely pan around scene ignoring scene size and when item is created scene size is of course resized.

[Talei]

Something that is puzzling me is this:
when newly created scene is put on view sceneRect is 0 and View display (in default case) white background and user can create object anywhere on that 0,0 scene.

I'm looking how it's done in that case.