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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtLocation module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qgeosatelliteinfosource_npe_backend_p.h"
#include <qdebug.h>
// Bitmask Table for satStatus
// Satellite is above elevation mask
#define SATELLITES_STATUS_VISIBLE 0x0002 // --------------1-
// Satellite used in position calculation
#define SATELLITES_STATUS_USED_POS 0x0004 // -------------1--
QGeoSatelliteInfoSourceNpeBackend::QGeoSatelliteInfoSourceNpeBackend(QObject *parent):
QGeoSatelliteInfoSource(parent),m_locationdConn(0), satOngoing(false),
mSatelliteError(QGeoSatelliteInfoSource::UnknownSourceError)
{
requestTimer = new QTimer(this);
QObject::connect(requestTimer, SIGNAL(timeout()), this, SLOT(requestTimerExpired()));
}
bool QGeoSatelliteInfoSourceNpeBackend::init()
{
m_locationdConn = new LocationDaemonConnection(this);
//check for Error: Could not connect to socket (locationd not started?)
if (!m_locationdConn->connected())
return(false);
connect(m_locationdConn, SIGNAL(satelliteUpdate(QList<SatelliteData>)), this, SLOT(onSatelliteUpdate(QList<SatelliteData>)));
connect(m_locationdConn, SIGNAL(connectionError(LocationDaemonConnection::SocketError)), this, SLOT(onConnectionError(LocationDaemonConnection::SocketError)));
return(true);
}
void QGeoSatelliteInfoSourceNpeBackend::setUpdateInterval(int msec)
{
int minInterval = m_locationdConn->minimumUpdateInterval();
if (msec < minInterval && msec != 0)
msec = minInterval;
QGeoSatelliteInfoSource::setUpdateInterval(msec);
if (!requestTimer->isActive())
m_locationdConn->setUpdateInterval(msec);
}
int QGeoSatelliteInfoSourceNpeBackend::minimumUpdateInterval() const
{
return(m_locationdConn->minimumUpdateInterval());
}
void QGeoSatelliteInfoSourceNpeBackend::startUpdates()
{
if (!satOngoing) {
satOngoing = true;
m_locationdConn->startSatelliteUpdates();
}
}
void QGeoSatelliteInfoSourceNpeBackend::stopUpdates()
{
if (satOngoing) {
satOngoing = false;
// if there's still a pending sat update request, wait for it to complete before stopping satellite updates
if (!requestTimer->isActive())
m_locationdConn->stopSatelliteUpdates();
}
}
void QGeoSatelliteInfoSourceNpeBackend::requestUpdate(int timeout)
{
// ignore if another requestUpdate is still pending
if (!requestTimer->isActive()) {
int minimumInterval = minimumUpdateInterval();
if (timeout == 0)
timeout = 5*minimumInterval; // set reasonable timeout if provided timeout is 0
// do not start request if timeout can not be fulfilled by the source
if (timeout < minimumInterval) {
emit requestTimeout();
return;
}
// get satellite update as fast as possible in case of ongoing tracking session
if ( satOngoing ) {
if ( QGeoSatelliteInfoSource::updateInterval() != minimumInterval)
m_locationdConn->setUpdateInterval(minimumInterval);
} else { // request the update only if no tracking session is active
m_locationdConn->requestSatelliteUpdate();
}
requestTimer->start(timeout);
}
}
void QGeoSatelliteInfoSourceNpeBackend::requestTimerExpired()
{
emit requestTimeout();
shutdownRequestSession();
}
void QGeoSatelliteInfoSourceNpeBackend::shutdownRequestSession()
{
requestTimer->stop();
// Restore updateInterval from before Request Session in case of ongoing tracking session
if ( satOngoing ) {
int minimumInterval = minimumUpdateInterval();
if ( QGeoSatelliteInfoSource::updateInterval() != minimumInterval)
setUpdateInterval(QGeoSatelliteInfoSource::updateInterval());
} else {
// If our timer expired before we could get a sat update, make sure we stop the locationd request
// (which would otherwise go on until a valid satellite update is obtained).
m_locationdConn->stopSatelliteUpdates();
}
}
void QGeoSatelliteInfoSourceNpeBackend::onSatelliteUpdate(const QList<SatelliteData> &satellites)
{
QList<QGeoSatelliteInfo> inUse;
QList<QGeoSatelliteInfo> inView;
QListIterator<SatelliteData> it(satellites);
if (!satellites.empty()) {
while (it.hasNext())
{
QGeoSatelliteInfo satinfo;
const SatelliteData &satellite = it.next();
satinfo.setAttribute(QGeoSatelliteInfo::Elevation, satellite.elevation);
satinfo.setAttribute(QGeoSatelliteInfo::Azimuth, satellite.azimuth);
satinfo.setSatelliteIdentifier(satellite.id);
satinfo.setSignalStrength(satellite.signalStrength);
if (satellite.satSystem == LocationdStrings::PositionInfo::kGPS)
satinfo.setSatelliteSystem(QGeoSatelliteInfo::GPS);
else if (satellite.satSystem == LocationdStrings::PositionInfo::kGLONASS)
satinfo.setSatelliteSystem(QGeoSatelliteInfo::GLONASS);
else
satinfo.setSatelliteSystem(QGeoSatelliteInfo::Undefined);
if (satellite.status & SATELLITES_STATUS_VISIBLE) {
inView.append(satinfo);
if (satellite.status & SATELLITES_STATUS_USED_POS)
inUse.append(satinfo);
}
}
if (inUse.count() > 0) // emit updated signal if satellite list is not empty
emit satellitesInUseUpdated(inUse);
qDebug() << "emit satelliteUpdated signals: in use count: " << inUse.count() << ", in view count: " <<inView.count();
if (inView.count() > 0)
emit satellitesInViewUpdated(inView);
if ( requestTimer->isActive() )
shutdownRequestSession();
}
}
QGeoSatelliteInfoSource::Error QGeoSatelliteInfoSourceNpeBackend::error() const
{
return mSatelliteError;
}
void QGeoSatelliteInfoSourceNpeBackend::setError(QGeoSatelliteInfoSource::Error satelliteError)
{
mSatelliteError = satelliteError;
emit QGeoSatelliteInfoSource::error(satelliteError);
}
void QGeoSatelliteInfoSourceNpeBackend::onConnectionError(LocationDaemonConnection::SocketError socketError)
{
switch (socketError) {
case LocationDaemonConnection::ClosedError:
setError(ClosedError);
break;
case LocationDaemonConnection::AccessError:
setError(AccessError);
break;
default:
setError(UnknownSourceError);
}
}
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