Qt-interest Archive, January 2007
Re: QGraphicsView and layers
Message 1 in thread
Fabian Hohmuth wrote:
> The second approach would give me the visibility management, but I'm
> reluctant to misuse a non-drawing item (the layer) as a parent for
> drawing items. I can also see issues with bounding box, contains() etc.
Invisible helper items are a very nice way to solve this problem. You get
everything you want from a layer, and all you need to do to switch the
stacking order is to change the layer items' Z value. Non-drawing items are
the cheapest kind of items to maintain.
Andreas
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