- Qt 5.3
- Qt Bluetooth
- Bluetooth QML Ping Pong example
- pingpong.h Example File
- Qt 5.3.2 Reference Documentation

# pingpong.h Example File

pingpong/pingpong.h

    /***************************************************************************
    **
    ** Copyright (C) 2014 BlackBerry Limited. All rights reserved.
    ** Contact: http://www.qt-project.org/legal
    **
    ** This file is part of the examples of the QtBluetooth module of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
    ** You may use this file under the terms of the BSD license as follows:
    **
    ** "Redistribution and use in source and binary forms, with or without
    ** modification, are permitted provided that the following conditions are
    ** met:
    **   * Redistributions of source code must retain the above copyright
    **     notice, this list of conditions and the following disclaimer.
    **   * Redistributions in binary form must reproduce the above copyright
    **     notice, this list of conditions and the following disclaimer in
    **     the documentation and/or other materials provided with the
    **     distribution.
    **   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
    **     of its contributors may be used to endorse or promote products derived
    **     from this software without specific prior written permission.
    **
    **
    ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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    ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
    **
    ** $QT_END_LICENSE$
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    ****************************************************************************/

    #ifndef PINGPONG_H
    #define PINGPONG_H

    #include <QTimer>
    #include <QObject>
    #include <qbluetoothserver.h>
    #include <qbluetoothserviceinfo.h>
    #include <qbluetoothlocaldevice.h>
    #include <qbluetoothservicediscoveryagent.h>

    static const QString serviceUuid(QStringLiteral("e8e10f95-1a70-4b27-9ccf-02010264e9c9"));

    class PingPong: public QObject
    {
        Q_OBJECT
        Q_PROPERTY(float ballX READ ballX NOTIFY ballChanged)
        Q_PROPERTY(float ballY READ ballY NOTIFY ballChanged)
        Q_PROPERTY(float leftBlockY READ leftBlockY NOTIFY leftBlockChanged)
        Q_PROPERTY(float rightBlockY READ rightBlockY NOTIFY rightBlockChanged)
        Q_PROPERTY(bool showDialog READ showDialog NOTIFY showDialogChanged)
        Q_PROPERTY(QString message READ message NOTIFY showDialogChanged)
        Q_PROPERTY(int role READ role NOTIFY roleChanged)
        Q_PROPERTY(int leftResult READ leftResult NOTIFY resultChanged)
        Q_PROPERTY(int rightResult READ rightResult NOTIFY resultChanged)
    public:
        PingPong();
        ~PingPong();
        float ballX() const;
        float ballY() const;
        float leftBlockY() const;
        float rightBlockY() const;
        void checkBoundaries();
        void updateDirection();
        bool showDialog() const;
        QString message() const;
        void setMessage(const QString &message);
        int role() const;
        int leftResult() const;
        int rightResult() const;
        void checkResult();

    public slots:
        void startGame();
        void update();
        void setSize(const float &x, const float &y);
        void updateBall(const float &bX, const float &bY);
        void updateLeftBlock(const float &lY);
        void updateRightBlock(const float &rY);
        void startServer();
        void startClient();
        void clientConnected();
        void clientDisconnected();
        void serverConnected();
        void serverDisconnected();
        void socketError(QBluetoothSocket::SocketError);
        void serverError(QBluetoothServer::Error);
        void serviceScanError(QBluetoothServiceDiscoveryAgent::Error);
        void done();
        void addService(const QBluetoothServiceInfo &);
        void readSocket();

    Q_SIGNALS:
        void ballChanged();
        void leftBlockChanged();
        void rightBlockChanged();
        void showDialogChanged();
        void roleChanged();
        void resultChanged();

    private:
        QBluetoothServer *m_serverInfo;
        QBluetoothServiceInfo m_serviceInfo;
        QBluetoothSocket *socket;
        QBluetoothServiceDiscoveryAgent *discoveryAgent;

        float m_ballX;
        float m_ballY;
        float m_ballPreviousX;
        float m_ballPreviousY;
        float m_leftBlockY;
        float m_rightBlockY;
        QTimer *m_timer;
        float m_boardWidth;
        float m_boardHeight;
        float m_direction;
        float m_targetX;
        float m_targetY;
        int interval;
        int m_resultLeft;
        int m_resultRight;
        bool m_showDialog;
        QString m_message;
        int m_role;
        float m_proportionX;
        float m_proportionY;
        bool m_serviceFound;
    };

    #endif // PINGPONG_H