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/****************************************************************************
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**
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the documentation of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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//! [0]
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QT -= gui
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//! [0]
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//! [1]
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QT += network opengl sql qt3support
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//! [1]
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//! [2]
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CONFIG += uic3
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//! [2]
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//! [3]
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#include <QClassName>
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//! [3]
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//! [4]
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#include <QString>
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#include <QApplication>
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#include <QSqlTableModel>
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//! [4]
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//! [5]
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#include <qclassname.h>
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//! [5]
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//! [6]
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#include <QtCore>
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//! [6]
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//! [7]
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using namespace Qt;
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//! [7]
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//! [8]
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QLabel *label1 = new QLabel("Hello", this);
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QLabel *label2 = new QLabel(this, "Hello");
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//! [8]
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//! [9]
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MyWidget::MyWidget(QWidget *parent, const char *name)
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: QWidget(parent, name)
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{
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...
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}
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//! [9]
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//! [10]
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// DEPRECATED
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if (obj->inherits("QPushButton")) {
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QPushButton *pushButton = (QPushButton *)obj;
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...
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}
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//! [10]
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//! [11]
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QPushButton *pushButton = qobject_cast<QPushButton *>(obj);
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if (pushButton) {
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...
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}
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//! [11]
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//! [12]
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QLabel *label = new QLabel;
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QPointer<QLabel> safeLabel = label;
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safeLabel->setText("Hello world!");
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delete label;
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// safeLabel is now 0, whereas label is a dangling pointer
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//! [12]
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//! [13]
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QT += qt3support
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//! [13]
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//! [14]
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DEFINES += QT3_SUPPORT
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//! [14]
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//! [15]
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DEFINES += QT3_SUPPORT_WARNINGS
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//! [15]
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//! [16]
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DEFINES += QT3_SUPPORT
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//! [16]
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