Qt-based BB10 API Examples Documentation

TossGame.cpp Example File

tossgame/src/TossGame.cpp
    /****************************************************************************
     **
     ** Portions Copyright (C) 2012, 2013  BlackBerry Limited.
     ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
     ** All rights reserved.
     ** Contact: BlackBerry Ltd. (http://www.blackberry.com/company/contact/)
     ** Contact: Nokia Corporation (qt-info@nokia.com)
     **
     ** This file is part of the examples of the BB10 Platform and is derived
     ** from a similar file that is part of the Qt Toolkit.
     **
     ** 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 BlackBerry, nor the name of Nokia
     **     Corporation 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
     ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
     **
     ****************************************************************************/

    #include "TossGame.hpp"

    #include <QtCore/QDebug>

    TossGame::TossGame(QObject *parent)
        : QObject(parent)
        , m_gesture(Rock)
        , m_active(false)
        , m_close(false)
    {
        // At first we have to connect to the sensor backend...
        if (!m_sensor.connectToBackend()) {
            qWarning() << "Cannot connect to proximity sensor backend!";
        }

        // ... and then add a filter that will process the reported data
        m_sensor.addFilter(this);
    }

    bool TossGame::filter(QProximityReading *reading)
    {
        if (m_close != reading->close()) { // Only react if the state changed
            m_close = reading->close();

            if (!m_close) { // If the user moves the device away from the body
                m_gesture = static_cast<Gesture>(qrand() % 3);
                emit gestureChanged();
            }
        }

        // Do no further processing of the sensor data
        return false;
    }

    TossGame::Gesture TossGame::gesture() const
    {
        return m_gesture;
    }

    bool TossGame::active() const
    {
        return m_active;
    }

    void TossGame::setActive(bool active)
    {
        if (m_active == active)
            return;

        m_active = active;
        emit activeChanged();

        // Start or stop the gathering of data
        if (m_active)
            m_sensor.start();
        else
            m_sensor.stop();
    }