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# window.cpp Example File
opengl/2dpainting/window.cpp

        /****************************************************************************
        **
        ** Copyright (C) 2006-2006 Trolltech ASA. All rights reserved.
        **
        ** This file is part of the documentation of the Qt Toolkit.
        **
        ** This file may be used under the terms of the GNU General Public
        ** License version 2.0 as published by the Free Software Foundation
        ** and appearing in the file LICENSE.GPL included in the packaging of
        ** this file.  Please review the following information to ensure GNU
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        ** http://www.trolltech.com/products/qt/opensource.html
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        ** review the following information:
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        #include <QtGui>
        #include "glwidget.h"
        #include "widget.h"
        #include "window.h"

        Window::Window()
            : QWidget()
        {
            Widget *native = new Widget(&helper, this);
            GLWidget *openGL = new GLWidget(&helper, this);
            QLabel *nativeLabel = new QLabel(tr("Native"));
            nativeLabel->setAlignment(Qt::AlignHCenter);
            QLabel *openGLLabel = new QLabel(tr("OpenGL"));
            openGLLabel->setAlignment(Qt::AlignHCenter);

            QGridLayout *layout = new QGridLayout;
            layout->addWidget(native, 0, 0);
            layout->addWidget(openGL, 0, 1);
            layout->addWidget(nativeLabel, 1, 0);
            layout->addWidget(openGLLabel, 1, 1);
            setLayout(layout);

            QTimer *timer = new QTimer(this);
            connect(timer, SIGNAL(timeout()), native, SLOT(animate()));
            connect(timer, SIGNAL(timeout()), openGL, SLOT(animate()));
            timer->start(50);

            setWindowTitle(tr("2D Painting on Native and OpenGL Widgets"));
        }