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This is the verbatim text of the qdesktopwidget.h include file. It is provided only for illustration; the copyright remains with Trolltech.

---

/****************************************************************************
** $Id$
**
** Definition of QDesktopWidget class.
**
** Created :
**
** Copyright (C) 1992-2001 Trolltech AS.  All rights reserved.
**
** This file is part of the kernel module of the Qt GUI Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech AS of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
** licenses for Unix/X11 may use this file in accordance with the Qt Commercial
** License Agreement provided with the Software.
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** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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#ifndef QDESKTOPWIDGET_H
#define QDESKTOPWIDGET_H

#ifndef QT_H
#include "qwidget.h"
#endif // QT_H

class QDesktopWidgetPrivate; /* Don't touch! */

class Q_EXPORT QDesktopWidget : public QWidget
{
    Q_OBJECT
public:
    QDesktopWidget();
    ~QDesktopWidget();

    bool isVirtualDesktop() const;

    int numScreens() const;
    int primaryScreen() const;

    int screenNumber( QWidget *widget = 0 ) const;
    int screenNumber( const QPoint & ) const;

    QWidget *screen( int screen = -1 );

    const QRect& screenGeometry( int screen = -1 ) const;

    // ### use Qt::HANDLE ?
    // ### if related, reimplement QPaintDevice::handle() to avoid warnings
#ifdef Q_WS_MAC
    GDHandle handle( int screen ) const;
#else
    // void *handle( int ) const { return 0; }
#endif

private:
    QDesktopWidgetPrivate *d;
};

#endif //QDESKTOPWIDGET_H