qtmobility/src/sensors/qrotationsensor.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 "qrotationsensor.h"
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#include "qrotationsensor_p.h"
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QTM_BEGIN_NAMESPACE
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IMPLEMENT_READING(QRotationReading)
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/*!
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    \class QRotationReading
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    \ingroup sensors_reading
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    \preliminary
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    \brief The QRotationReading class represents one reading from the
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           rotation sensor.
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    \section2 QRotationReading Units
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    The rotation reading contains 3 angles, measured in degrees that define the orientation
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    of the device in three-dimensional space. The three angles are applied to the device in the
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    following order.
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    \list
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    \o Right-handed rotation z (-180, 180]. Starting from the x axis and incrementing towards the
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       y axis.
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    \o Right-handed rotation x (-90, 90]. Starting from the new (once-rotated) y axis and
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       incrementing towards the z axis.
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    \o Right-handed rotation y (-180, 180]. Starting from the new (twice-rotated) z axis and
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       incrementing towards the x axis.
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    \endlist
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    \image Rotation_angles.png Visual representation of the rotation angles.
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    The 0 point for the z angle is defined as a fixed, external entity and is device-specific. While magnetic
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    north is typically used as this reference point it may not be. Do not attempt to compare values
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    for the z angle between devices or even on the same device if it has moved a significant distance.
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    If the device cannot detect a fixed, external entity the z angle will always be 0 and the
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    QRotationSensor::hasZ property will be set to false.
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    The 0 point for the x and y angles are defined as when the x and y axes of the device are oriented
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    towards the horizon.
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*/
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/*!
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    \property QRotationReading::x
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    \brief the rotation around the x axis.
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    Measured as degrees.
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    \sa {QRotationReading Units}
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*/
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qreal QRotationReading::x() const
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{
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    return d->x;
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}
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/*!
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    Sets the rotation around the x axis to \a x.
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*/
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void QRotationReading::setX(qreal x)
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{
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    d->x = x;
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}
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/*!
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    \property QRotationReading::y
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    \brief the rotation around the y axis.
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    Measured as degrees.
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    \sa {QRotationReading Units}
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*/
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qreal QRotationReading::y() const
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{
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    return d->y;
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}
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/*!
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    Sets the rotation around the y axis to \a y.
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*/
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void QRotationReading::setY(qreal y)
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{
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    d->y = y;
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}
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/*!
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    \property QRotationReading::z
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    \brief the rotation around the z axis.
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    Measured as degrees.
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    \sa {QRotationReading Units}
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*/
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qreal QRotationReading::z() const
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{
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    return d->z;
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}
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/*!
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    Sets the rotation around the z axis to \a z.
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*/
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void QRotationReading::setZ(qreal z)
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{
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    d->z = z;
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}
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// =====================================================================
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/*!
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    \class QRotationFilter
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    \ingroup sensors_filter
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    \preliminary
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    \brief The QRotationFilter class is a convenience wrapper around QSensorFilter.
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    The only difference is that the filter() method features a pointer to QRotationReading
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    instead of QSensorReading.
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*/
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/*!
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    \fn QRotationFilter::filter(QRotationReading *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 *QRotationSensor::type("QRotationSensor");
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/*!
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    \class QRotationSensor
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    \ingroup sensors_type
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    \preliminary
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    \brief The QRotationSensor 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 QRotationReading instead of a QSensorReading.
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    For details about how the sensor works, see \l QRotationReading.
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    \sa QRotationReading
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*/
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/*!
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    \fn QRotationSensor::QRotationSensor(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 QRotationSensor::~QRotationSensor()
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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 QRotationSensor::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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/*!
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    \property QRotationSensor::hasZ
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    \brief a value indicating if the z angle is available.
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    Returns true if z is available.
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    Returns false if z is not available.
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*/
1
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#include "moc_qrotationsensor.cpp"
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QTM_END_NAMESPACE
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