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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "logfilepositionsource.h"
#include <QtCore/qdebug.h>
#include <QtCore/qfile.h>
#include <QtCore/qtimer.h>
LogFilePositionSource::LogFilePositionSource(QObject *parent)
: QGeoPositionInfoSource(parent),
logFile(new QFile(this)),
timer(new QTimer(this))
{
connect(timer, &QTimer::timeout, this, &LogFilePositionSource::readNextPosition);
logFile->setFileName(":/simplelog.txt");
if (!logFile->open(QIODevice::ReadOnly))
qWarning() << "Error: cannot open source file" << logFile->fileName();
}
QGeoPositionInfo LogFilePositionSource::lastKnownPosition(bool /*satelliteMethodsOnly*/) const
{
return lastPosition;
}
LogFilePositionSource::PositioningMethods LogFilePositionSource::supportedPositioningMethods() const
{
return AllPositioningMethods;
}
int LogFilePositionSource::minimumUpdateInterval() const
{
return 500;
}
void LogFilePositionSource::startUpdates()
{
lastError = QGeoPositionInfoSource::NoError;
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
lastError = QGeoPositionInfoSource::NoError;
if (logFile->canReadLine()) {
readNextPosition();
} else {
lastError = QGeoPositionInfoSource::UpdateTimeoutError;
emit QGeoPositionInfoSource::errorOccurred(lastError);
}
}
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 lastError;
}
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