qtmobility/src/sensors/qcompass.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Mon, 03 May 2010 13:18:40 +0300
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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 "qcompass.h"
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#include "qcompass_p.h"
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QTM_BEGIN_NAMESPACE
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IMPLEMENT_READING(QCompassReading)
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/*!
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    \class QCompassReading
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    \ingroup sensors_reading
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    \preliminary
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    \brief The QCompassReading class represents one reading from a
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           compass.
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    \section2 QCompassReading Units
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    The compass returns the azimuth of the device as degrees from
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    magnetic north in a clockwise direction based on the top of the UI.
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    There is also a value to indicate the calibration status of the device.
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    If the device is not calibrated the azimuth may not be accurate.
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    Digital compasses are susceptible to magnetic interference and may need
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    calibration after being placed near anything that emits a magnetic force.
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    Accuracy of the compass can be affected by any ferrous materials that are nearby.
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    The calibration status of the device is measured as a number from 0 to 1.
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    A value of 1 is the highest level that the device can support and 0 is
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    the worst.
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*/
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/*!
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    \property QCompassReading::azimuth
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    \brief the azimuth of the device.
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    Measured in degrees from magnetic north in a clockwise direction based
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    the top of the UI.
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    \sa {QCompassReading Units}
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*/
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qreal QCompassReading::azimuth() const
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{
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    return d->azimuth;
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}
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/*!
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    Sets the \a azimuth of the device.
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*/
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void QCompassReading::setAzimuth(qreal azimuth)
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{
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    d->azimuth = azimuth;
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}
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/*!
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    \property QCompassReading::calibrationLevel
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    \brief the calibration level of the reading.
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    Measured as a value from 0 to 1 with higher values being better.
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    \sa {QCompassReading Units}
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*/
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qreal QCompassReading::calibrationLevel() const
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{
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    return d->calibrationLevel;
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}
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/*!
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    Sets the calibration level of the reading to \a calibrationLevel.
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*/
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void QCompassReading::setCalibrationLevel(qreal calibrationLevel)
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{
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    d->calibrationLevel = calibrationLevel;
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}
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// =====================================================================
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/*!
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    \class QCompassFilter
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    \ingroup sensors_filter
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    \preliminary
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    \brief The QCompassFilter class is a convenience wrapper around QSensorFilter.
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    The only difference is that the filter() method features a pointer to QCompassReading
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    instead of QSensorReading.
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*/
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/*!
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    \fn QCompassFilter::filter(QCompassReading *reading)
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    Called when \a reading changes. Returns false to prevent the reading from propagating.
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    \sa QSensorFilter::filter()
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*/
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const char *QCompass::type("QCompass");
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/*!
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    \class QCompass
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    \ingroup sensors_type
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    \preliminary
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    \brief The QCompass class is a convenience wrapper around QSensor.
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    The only behavioural difference is that this class sets the type properly.
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    This class also features a reading() function that returns a QCompassReading instead of a QSensorReading.
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    For details about how the sensor works, see \l QCompassReading.
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    \sa QCompassReading
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*/
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/*!
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    \fn QCompass::QCompass(QObject *parent)
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    Construct the sensor as a child of \a parent.
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*/
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/*!
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    \fn QCompass::~QCompass()
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    Destroy the sensor. Stops the sensor if it has not already been stopped.
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*/
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/*!
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    \fn QCompass::reading() const
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    Returns the reading class for this sensor.
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    \sa QSensor::reading()
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*/
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#include "moc_qcompass.cpp"
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QTM_END_NAMESPACE
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