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+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+** * Redistributions of source code must retain the above copyright
+** notice, this list of conditions and the following disclaimer.
+** * Redistributions in binary form must reproduce the above copyright
+** notice, this list of conditions and the following disclaimer in
+** the documentation and/or other materials provided with the
+** distribution.
+** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+** of its contributors may be used to endorse or promote products derived
+** from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include <QtCore>
+
+#include "logfilepositionsource.h"
+
+LogFilePositionSource::LogFilePositionSource(QObject *parent)
+ : QGeoPositionInfoSource(parent),
+ logFile(new QFile(this)),
+ timer(new QTimer(this))
+{
+ connect(timer, SIGNAL(timeout()), this, SLOT(readNextPosition()));
+
+ logFile->setFileName(QCoreApplication::applicationDirPath()
+ + QDir::separator() + "simplelog.txt");
+ if (!logFile->open(QIODevice::ReadOnly))
+ qWarning() << "Error: cannot open source file" << logFile->fileName();
+}
+
+QGeoPositionInfo LogFilePositionSource::lastKnownPosition(bool /*fromSatellitePositioningMethodsOnly*/) const
+{
+ return lastPosition;
+}
+
+LogFilePositionSource::PositioningMethods LogFilePositionSource::supportedPositioningMethods() const
+{
+ return AllPositioningMethods;
+}
+
+int LogFilePositionSource::minimumUpdateInterval() const
+{
+ return 500;
+}
+
+void LogFilePositionSource::startUpdates()
+{
+ int interval = updateInterval();
+ if (interval < minimumUpdateInterval())
+ interval = minimumUpdateInterval();
+
+ timer->start(interval);
+}
+
+void LogFilePositionSource::stopUpdates()
+{
+ timer->stop();
+}
+
+void LogFilePositionSource::requestUpdate(int /*timeout*/)
+{
+ // For simplicity, ignore timeout - assume that if data is not available
+ // now, no data will be added to the file later
+ if (logFile->canReadLine())
+ readNextPosition();
+ else
+ emit updateTimeout();
+}
+
+void LogFilePositionSource::readNextPosition()
+{
+ QByteArray line = logFile->readLine().trimmed();
+ if (!line.isEmpty()) {
+ QList<QByteArray> data = line.split(' ');
+ double latitude;
+ double longitude;
+ bool hasLatitude = false;
+ bool hasLongitude = false;
+ QDateTime timestamp = QDateTime::fromString(QString(data.value(0)), Qt::ISODate);
+ latitude = data.value(1).toDouble(&hasLatitude);
+ longitude = data.value(2).toDouble(&hasLongitude);
+
+ if (hasLatitude && hasLongitude && timestamp.isValid()) {
+ QGeoCoordinate coordinate(latitude, longitude);
+ QGeoPositionInfo info(coordinate, timestamp);
+ if (info.isValid()) {
+ lastPosition = info;
+ emit positionUpdated(info);
+ }
+ }
+ }
+}
+
+QGeoPositionInfoSource::Error LogFilePositionSource::error() const
+{
+ return QGeoPositionInfoSource::NoError;
+}