[Qt-interest] QGraphicsItem and setZValue..how it works?

[Riccardo Roasio]

But there is a way to solve this problem?

Can i change the z value dinamically?

Thanks,
Riccardo

2009/10/19 Thiago Macieira <thiago at kde.org>

> Em Segunda-feira 19 Outubro 2009, às 11:03:30, você escreveu:
> > Hi,
> >
> > i have two QGraphicsItem with setZValue(32)
> > Those items are represented as rectangle on the screen
> >
> > both items have childs (smallest rectangle) with setZValue(40)
> >
> > The problem is this:
> >
> > If i drag a child of the first item on the second one it is drawed under
> >  the item while i espect it to be over the item due to the bigger Z
> >  value....
> >
> > Whi this appens?
>
> The Z-order applies to siblings only. So if you have two items that are
> children of the same parent with different z-order, the one with highest z-
> order will be drawn on top of the other.
>
> However, that's not what you have. You have two items that are siblings
> with
> the same z-order (32). And each of those has a child item, whose z-order
> doesn't matter.
>
> Since the two siblings have the same z-order, they and their children are
> drawn according to pointer address (I think). That's why the grandchild
> item
> is drawn under the child, even though the z-order is greater.
>
> --
> Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
>  Senior Product Manager - Nokia, Qt Development Frameworks
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