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# ratecontroller.h Example File
network/torrent/ratecontroller.h

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        ** Copyright (C) 2004-2006 Trolltech ASA. All rights reserved.
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        ** This file is part of the documentation of the Qt Toolkit.
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        ** and appearing in the file LICENSE.GPL included in the packaging of
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        #ifndef RATECONTROLLER_H
        #define RATECONTROLLER_H

        #include <QObject>
        #include <QSet>
        #include <QTime>

        class PeerWireClient;

        class RateController : public QObject
        {
            Q_OBJECT
        public:
            inline RateController(QObject *parent = 0)
                : QObject(parent), transferScheduled(false) { }
            static RateController *instance();

            void addSocket(PeerWireClient *socket);
            void removeSocket(PeerWireClient *socket);

            inline int uploadLimit() const { return upLimit; }
            inline int downloadLimit() const { return downLimit; }
            inline void setUploadLimit(int bytesPerSecond) { upLimit = bytesPerSecond; }
            void setDownloadLimit(int bytesPerSecond);

        public slots:
            void transfer();
            void scheduleTransfer();

        private:
            QTime stopWatch;
            QSet<PeerWireClient *> sockets;
            int upLimit;
            int downLimit;
            bool transferScheduled;
        };

        #endif