/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
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**
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** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
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** packaging of this file. Please review the following information to
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****************************************************************************/
#ifndef QTCAST_H
#define QTCAST_H
#include <QWidget>
class MyWidget : public QWidget
{
Q_OBJECT
public:
MyWidget();
};
#endif
#include <QLabel>
#include <QPushButton>
#include "qtcast.h"
MyWidget::MyWidget()
{
QObject *obj = new MyWidget;
QWidget *widget = qobject_cast<QWidget *>(obj);
MyWidget *myWidget = qobject_cast<MyWidget *>(obj);
QLabel *label = qobject_cast<QLabel *>(obj);
// label is 0
if (QLabel *label = qobject_cast<QLabel *>(obj)) {
label->setText(tr("Ping"));
} else if (QPushButton *button = qobject_cast<QPushButton *>(obj)) {
button->setText(tr("Pong!"));
}
}
int main()
{
return 0;
}
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