/****************************************************************************

**

** Copyright (C) 2010 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.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** 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

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

//! [0]

QT -= gui

//! [0]

//! [1]

QT += network opengl sql qt3support

//! [1]

//! [2]

CONFIG += uic3

//! [2]

//! [3]

#include <QClassName>

//! [3]

//! [4]

#include <QString>

#include <QApplication>

#include <QSqlTableModel>

//! [4]

//! [5]

#include <qclassname.h>

//! [5]

//! [6]

#include <QtCore>

//! [6]

//! [7]

using namespace Qt;

//! [7]

//! [8]

QLabel *label1 = new QLabel("Hello", this);

QLabel *label2 = new QLabel(this, "Hello");

//! [8]

//! [9]

MyWidget::MyWidget(QWidget *parent, const char *name)

    : QWidget(parent, name)

{

    ...

}

//! [9]

//! [10]

// DEPRECATED

if (obj->inherits("QPushButton")) {

    QPushButton *pushButton = (QPushButton *)obj;

    ...

}

//! [10]

//! [11]

QPushButton *pushButton = qobject_cast<QPushButton *>(obj);

if (pushButton) {

    ...

}

//! [11]

//! [12]

QLabel *label = new QLabel;

QPointer<QLabel> safeLabel = label;

safeLabel->setText("Hello world!");

delete label;

// safeLabel is now 0, whereas label is a dangling pointer

//! [12]

//! [13]

QT += qt3support

//! [13]

//! [14]

DEFINES += QT3_SUPPORT

//! [14]

//! [15]

DEFINES += QT3_SUPPORT_WARNINGS

//! [15]

//! [16]

DEFINES += QT3_SUPPORT

//! [16]