qtmobility/plugins/sensors/maemo6/maemo6als.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 11 Jun 2010 14:26:25 +0300
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Revision: 201021 Kit: 2010123
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/****************************************************************************
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**
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** Copyright (C) 2010 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 "maemo6als.h"
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const char *maemo6als::id("maemo6.als");
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bool maemo6als::m_initDone = false;
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maemo6als::maemo6als(QSensor *sensor)
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    : maemo6sensorbase(sensor)
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{
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    setReading<QAmbientLightReading>(&m_reading);
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    if (!m_initDone) {
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        initSensor<ALSSensorChannelInterface>("alssensor");
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        if (m_sensorInterface)
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            QObject::connect(static_cast<const ALSSensorChannelInterface*>(m_sensorInterface), SIGNAL(ALSChanged(const Unsigned&)), this, SLOT(slotDataAvailable(const Unsigned&)));
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        else
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            qWarning() << "Unable to initialize ambient light sensor.";
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        // metadata
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        addDataRate(1, 1); // 1Hz
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        sensor->setDataRate(1);
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        addOutputRange(0, 5, 1);
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        setDescription(QLatin1String("Measures ambient light intensity given as 5 pre-defined levels"));
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        m_initDone = true;
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    }
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}
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void maemo6als::slotDataAvailable(const Unsigned& data)
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{
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    // Convert from integer to fixed levels
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    // TODO: verify levels
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    QAmbientLightReading::LightLevel level;
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    int x = data.x();
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    if (x < 0) {
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        level = QAmbientLightReading::Undefined;
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    } else if (x < 10) {
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        level = QAmbientLightReading::Dark;
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    } else if (x < 50) {
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        level = QAmbientLightReading::Twilight;
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    } else if (x < 100) {
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        level = QAmbientLightReading::Light;
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    } else if (x < 150) {
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        level = QAmbientLightReading::Bright;
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    } else {
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        level = QAmbientLightReading::Sunny;
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    }
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    if (level != m_reading.lightLevel()) {
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        m_reading.setLightLevel(level);
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        m_reading.setTimestamp(data.UnsignedData().timestamp_);
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        newReadingAvailable();
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    }
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}