> One last question... I can't seem to find  
> "QGraphicsItem.addToIndex()" and
> "QGraphicsItem.removeFromIndex()" in the documentation. What exactly  
> are
> these doing in this context? My suspicion is that calling
> "removeFromIndex()" and then "addToIndex()" is doing something  
> similar to
> calling "update()"?

Hi

addToIndex / removeFromIndex are internal functions which should not  
be used :) The more proper solution would have been to use  
prepareGeometryChange() which is public documented API and which will  
in turn call update() if required.

-
Gunnar
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