/****************************************************************************
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** This file is part of the documentation of the Qt Toolkit.
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** Alternatively, this file may be used under the terms of the GNU
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#ifndef QTCAST_H
#define QTCAST_H
#include
class MyWidget : public QWidget
{
Q_OBJECT
public:
MyWidget();
};
#endif
#include
#include
#include "qtcast.h"
MyWidget::MyWidget()
{
QObject *obj = new MyWidget;
QWidget *widget = qobject_cast(obj);
MyWidget *myWidget = qobject_cast(obj);
QLabel *label = qobject_cast(obj);
// label is 0
if (QLabel *label = qobject_cast(obj)) {
label->setText(tr("Ping"));
} else if (QPushButton *button = qobject_cast(obj)) {
button->setText(tr("Pong!"));
}
}
int main()
{
return 0;
}