[Qt-interest] Best way to combine QGraphicsItem and qobject_cast

[Malyushytsky, Alex]

Consider using setData:

void QGraphicsItem::setData ( int key, const QVariant & value )

Alex

-----Original Message-----
From: qt-interest-bounces+alex=wai.com at qt.nokia.com [mailto:qt-interest-bounces+alex=wai.com at qt.nokia.com] On Behalf Of NoRulez
Sent: Monday, January 03, 2011 6:56 PM
To: Qt Interest MailingList
Subject: [Qt-interest] Best way to combine QGraphicsItem and qobject_cast

Hi,

I've several QGraphicsItems such as QGraphicsRectItem.
Now I want to have a setId() and a getId() function for each item.
So, what is the best way to do so?

As the result I want to do something like

foreach (QGraphicsItem *pItem, pScene->selectedItems()) {
    qDebug() << qobject_cast<MyBaseClass*>(pItem)->getId();
}

My idea was to add a class and inherit from it:

class MyBaseClass : public QObject {
    Q_OBJECT
public:
    void setId(const QString&);
    QString getId() const;
};

class MyItem : public QGraphicsRectItem, public MyBaseClass {
};

Thanks in advance

Best Regards
NoRulez
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