diff options
Diffstat (limited to 'src/location/qgeosatelliteinfosource_wince.cpp')
| -rw-r--r-- | src/location/qgeosatelliteinfosource_wince.cpp | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/src/location/qgeosatelliteinfosource_wince.cpp b/src/location/qgeosatelliteinfosource_wince.cpp new file mode 100644 index 00000000..5b5ae48c --- /dev/null +++ b/src/location/qgeosatelliteinfosource_wince.cpp @@ -0,0 +1,169 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the Qt Mobility Components. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QList> +#include <QHash> + +#include <qgeosatelliteinfo.h> + +#include "qgeosatelliteinfosource_wince_p.h" +#include "qgeoinfothread_wince_p.h" + +QTM_BEGIN_NAMESPACE + +// ========== QGeoSatelliteInfoValidator ========== + +QGeoSatelliteInfoValidator::QGeoSatelliteInfoValidator() : QGeoInfoValidator() {} + +QGeoSatelliteInfoValidator::~QGeoSatelliteInfoValidator() {} + +// Returns true if data contains at least the minimal amount of data we need to produce one of the +// QGeoSatelliteInfoSource signals, otherwise returns false. +bool QGeoSatelliteInfoValidator::valid(const GPS_POSITION &data) const +{ + if (((data.dwValidFields & GPS_VALID_SATELLITE_COUNT) == 0) + || ((data.dwValidFields & GPS_VALID_SATELLITES_IN_VIEW) == 0) + || ((data.dwValidFields & GPS_VALID_SATELLITES_IN_VIEW_PRNS) == 0) + || ((data.dwValidFields & GPS_VALID_SATELLITES_IN_VIEW_SIGNAL_TO_NOISE_RATIO) == 0)) { + return false; + } + return true; +} + +// ========== QGeoSatelliteInfoSourceWinCE ========== + +QGeoSatelliteInfoSourceWinCE::QGeoSatelliteInfoSourceWinCE(QObject *parent) : QGeoSatelliteInfoSource(parent) +{ + QGeoSatelliteInfoValidator *validator = new QGeoSatelliteInfoValidator(); + + // The QGeoInfoThreadWinCE instance takes ownership of the validator. + infoThread = new QGeoInfoThreadWinCE(validator, false, this); + infoThread->setUpdateInterval(DefaultUpdateInterval); + infoThread->start(); + + // QGeoInfoThreadWinCE takes care of registering GPS_POSITION as a metatype. + connect(infoThread, SIGNAL(dataUpdated(GPS_POSITION)), this, SLOT(dataUpdated(GPS_POSITION))); + connect(infoThread, SIGNAL(updateTimeout()), this, SIGNAL(requestTimeout())); +} + +QGeoSatelliteInfoSourceWinCE::~QGeoSatelliteInfoSourceWinCE() +{ + delete infoThread; +} + +void QGeoSatelliteInfoSourceWinCE::startUpdates() +{ + infoThread->startUpdates(); +} + +void QGeoSatelliteInfoSourceWinCE::stopUpdates() +{ + infoThread->stopUpdates(); +} + +void QGeoSatelliteInfoSourceWinCE::requestUpdate(int timeout) +{ + if (timeout < 0) + emit requestTimeout(); + else + infoThread->requestUpdate(timeout); +} + +/* + This is _only_ called when QGeoSatelliteInfoValidator::valid() returns true for the position. + This means that it is implied that: + - (data.dwValidFields & GPS_VALID_SATELLITE_COUNT) != 0 + - (data.dwValidFields & GPS_VALID_SATELLITES_IN_VIEW) != 0 + - (data.dwValidFields & GPS_VALID_SATELLITES_IN_VIEW_PRNS) != 0 + - (data.dwValidFields & GPS_VALID_SATELLITES_IN_VIEW_SIGNAL_TO_NOISE_RATIO) != 0 + + This guarantees that the newly created position will be valid. + If the code is changed such that this is no longer guaranteed then this method will need to be + updated to test for those conditions. +*/ +void QGeoSatelliteInfoSourceWinCE::dataUpdated(GPS_POSITION data) +{ + // Satellites in view are hashed on the PRN values since the PRN value is how we + // determine which of the satellites are in use. + QHash<int, QGeoSatelliteInfo> satellitesInView; + + for (unsigned int i = 0; i < data.dwSatellitesInView; ++i) { + QGeoSatelliteInfo satellite; + + satellite.setPrnNumber(data.rgdwSatellitesInViewPRNs[i]); + satellite.setSignalStrength(data.rgdwSatellitesInViewSignalToNoiseRatio[i]); + + // The following properties are optional, and so are set if the data is present and valid + // in the GPS_POSITION structure. + if ((data.dwValidFields & GPS_VALID_SATELLITES_IN_VIEW_AZIMUTH) != 0) { + satellite.setAttribute(QGeoSatelliteInfo::Azimuth, + data.rgdwSatellitesInViewAzimuth[i]); + } + + if ((data.dwValidFields & GPS_VALID_SATELLITES_IN_VIEW_ELEVATION) != 0) { + satellite.setAttribute(QGeoSatelliteInfo::Elevation, + data.rgdwSatellitesInViewElevation[i]); + } + + satellitesInView.insert(satellite.prnNumber(), satellite); + } + + emit satellitesInViewUpdated(satellitesInView.values()); + + // If the PRN data for the satellites which were used is unavailable we are done... + if ((data.dwValidFields & GPS_VALID_SATELLITES_USED_PRNS) == 0) + return; + + // ...otherwise we construct the list of satellites which are in use and emit the appropriate + // signal + QList<QGeoSatelliteInfo> satellitesInUse; + + for (unsigned int i = 0; i < data.dwSatelliteCount; ++i) { + int inUsePRN = data.rgdwSatellitesUsedPRNs[i]; + if (satellitesInView.contains(inUsePRN)) + satellitesInUse << satellitesInView.value(inUsePRN); + } + + emit satellitesInUseUpdated(satellitesInUse); +} + +#include "moc_qgeosatelliteinfosource_wince_p.cpp" +QTM_END_NAMESPACE |