Question

这里是qtimer.h包含文件的所有文本，一字不差。它仅仅用来说明，版权由Trolltech保留。

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/****************************************************************************
** $Id:  qt/qtimer.h   3.0.5   edited Oct 12 2001 $
**
** Definition of QTimer class
**
** Created : 931111
**
** Copyright (C) 1992-2000 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 may use this file in accordance with the Qt Commercial License
** Agreement provided with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
**   information about Qt Commercial License Agreements.
** See http://www.trolltech.com/qpl/ for QPL licensing information.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/

#ifndef QTIMER_H
#define QTIMER_H

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


class Q_EXPORT QTimer : public QObject
{
    Q_OBJECT
public:
    QTimer( QObject *parent=0, const char *name=0 );
   ~QTimer();

    bool	isActive() const;

    int		start( int msec, bool sshot = FALSE );
    void	changeInterval( int msec );
    void	stop();

    static void singleShot( int msec, QObject *receiver, const char *member );

signals:
    void	timeout();

protected:
    bool	event( QEvent * );

private:
    int id;
    uint single : 1;
    uint nulltimer : 1;

private:	// Disabled copy constructor and operator=
#if defined(Q_DISABLE_COPY)
    QTimer( const QTimer & );
    QTimer &operator=( const QTimer & );
#endif
};


inline bool QTimer::isActive() const
{
    return id >= 0;
}


#endif // QTIMER_H