MouseDoubleClickEvent on a QGraphicsScene

[paolom]

Hi,
I've a question...

I use QGraphicsView. I've this method on a sublcasses of QGraphicsScene:

void MPApplicationScene::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event)
 {
     if(items(event->scenePos()).last()!=0)
     {
         emit itemSelected(items(event->scenePos()).last());
     }
 }

void MPApplicationScene::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event)
 {
     if(items(event->scenePos()).last()!=0)
     {
         emit itemSelected(items(event->scenePos()).last());
     }
 }

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In my QGraphicsScene I've more than one item. One of this kinds is a subclasses of QGraphicsItem and other are QGraphicsRectItem. The QGraphicsItem item have a z value more little (for this I use the last() function of the item list obtained with the items() QGraphicsScene function).

How can I be sure that the items that I double clicked are instance of the subclasses of the QGraphicsItem and not other (QGraphicsRectItem for example)?!?

Is there any method to understand which kind of instance is a specify object?!?!

Thanks