Matthias Kleine wrote:
> Gunnar Sletta wrote:
>  > If you replace your moving car items with QGraphicsPixmapItem's, does
>  > that solve the performance problem?
> 
> I came up with a similar idea. Looking at the C++ code I realized that 
> QGraphicsItemGroup already provides bounding box caching. Simply 
> wrapping my custom graphics items in item groups should do the trick. 
> Unfortunately, when trying to add a custom graphics item to a item group 
> I end up with the following error:
> 
> QtJambiTypeManager::convertInternalToExternal: Cannot convert to type 
> 'com/trolltech/qt/gui/QGraphicsItem$ConcreteWrapper' from 'QGraphicsItem*'
> 
> Any idea where this might come from?

Do you have the code?

-

Gunnar
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