identify QGraphicItem

[avis_phoenix]

I have a class of QGraphicItem type that contains special properties and I wanted that when selected one of them, it knew as he is the one that they selected but not like QGraphicItem but like an object of the class which I did, somebody knows like doing this?
Thanks

[darksaga]

how about:

MyItem *item = NULL;
	item = qobject_cast<MyItem *>(selectedItem());
	if (item != NULL){
		item->doSomething();
	}

MyItem *item = NULL;
	item = qobject_cast<MyItem *>(selectedItem());
	if (item != NULL){
		item->doSomething();
	}

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[Gopala Krishna]

qobject_cast works only if the item also inherits QObject which the default QGraphicsItems don't inherit.
So my advice is to use qgraphicsitem_cast instead (replace qobject_cast with qgraphics_cast in above example). Read this qt doc.

[Bitto]

Or just use standard C++ dynamic_cast<T>(). qobject_cast and qgraphicsitem_cast are only necessary for apps that are compiled with RTTI disabled; mostly for embedded apps, or for old compilers. For modern apps, I just use dynamic_cast ;-).

Note: qgraphicsitem_cast does not support polymorphic casts.

[avis_phoenix]

Well when it tries to use qgraphicsitem_cast I could not, then I wanted some tutorial or example to using it , Thanks.

Sorry for my bad english.

[avis_phoenix]

Well... here the correct code for use qgraphicsitem_cast:

Eitem = NULL;
    foreach (QGraphicsItem *item, Scene->selectedItems())
    {
        Eitem = qgraphicsitem_cast<MyClass*>(item);
        if (Eitem != NULL)
        {
              //My Code
        }
    }

Eitem = NULL;
    foreach (QGraphicsItem *item, Scene->selectedItems())
    {
        Eitem = qgraphicsitem_cast<MyClass*>(item);
        if (Eitem != NULL)
        {
              //My Code
        }
    }

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Thanks for all