[Qt-interest] [SOLVED] Re: How to Map Back a QGraphicsItem by position ?

[Aaron Lewis]

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On 05/10/2010 12:41 PM, Ross Bencina wrote:
> Hi Aaron
> 
> Once you've implemented type() you can use qgraphicsitem_cast<> to do a 
> type-safe downcast, similar to the usual C++ dynamic_cast operator, it will 
> return NULL if the cast fails.
> 
> // YourItemType is a subclass of QGraphicsItem
> 
> QGraphicsItem *graphicsItem = ?? // get a graphics item from somewhere
> YourItemType *item= qgraphicsitem_cast<YourItemType*>(graphicsItem);
> if(item)
> {
>     // graphicsItem has type YourItemType, do something with it here.
> }
> 

All Good for a safe cast , thanks Ross ;-)


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Best Regards,
Aaron Lewis - PGP: 0x4A6D32A0
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