qtmobility/examples/sensors/grueplugin/gruesensorimpl.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Mon, 03 May 2010 13:18:40 +0300
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permissions -rw-r--r--
Revision: 201015 Kit: 201018
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/****************************************************************************
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**
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the Qt Mobility Components.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file.  Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights.  These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "gruesensorimpl.h"
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#include <QDebug>
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const char *gruesensorimpl::id("grue.gruesensor");
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gruesensorimpl::gruesensorimpl(QSensor *sensor)
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    : QSensorBackend(sensor)
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{
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    lightSensor = new QAmbientLightSensor(this);
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    lightSensor->addFilter(this);
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    lightSensor->connectToBackend();
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    setReading<GrueSensorReading>(&m_reading);
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    setDataRates(lightSensor);
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    addOutputRange(0, 1, 0.1);
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    setDescription(QLatin1String("Grue Sensor"));
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}
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void gruesensorimpl::start()
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{
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    lightSensor->setDataRate(sensor()->dataRate());
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    lightSensor->start();
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}
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void gruesensorimpl::stop()
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{
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    lightSensor->stop();
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}
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bool gruesensorimpl::filter(QAmbientLightReading *reading)
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{
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    qreal chance;
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    switch (reading->lightLevel()) {
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    case QAmbientLightReading::Undefined:
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        chance = 0.5; // No idea... call it 50/50
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        break;
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    case QAmbientLightReading::Dark:
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        chance = 1.0;
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        break;
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    case QAmbientLightReading::Twilight:
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        chance = 0.1;
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        break;
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    default:
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        chance = 0.0;
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        break;
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    }
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4
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    if (chance != m_reading.chanceOfBeingEaten()) {
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        m_reading.setTimestamp(reading->timestamp());
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        m_reading.setChanceOfBeingEaten(chance);
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        newReadingAvailable();
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    }
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    return true;
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}
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