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50 #include <QtCore>
51
52 #include "logfilepositionsource.h"
53
LogFilePositionSource(QObject * parent)54 LogFilePositionSource::LogFilePositionSource(QObject *parent)
55 : QGeoPositionInfoSource(parent),
56 logFile(new QFile(this)),
57 timer(new QTimer(this))
58 {
59 connect(timer, SIGNAL(timeout()), this, SLOT(readNextPosition()));
60
61 logFile->setFileName(":/simplelog.txt");
62 if (!logFile->open(QIODevice::ReadOnly))
63 qWarning() << "Error: cannot open source file" << logFile->fileName();
64 }
65
lastKnownPosition(bool) const66 QGeoPositionInfo LogFilePositionSource::lastKnownPosition(bool /*fromSatellitePositioningMethodsOnly*/) const
67 {
68 return lastPosition;
69 }
70
supportedPositioningMethods() const71 LogFilePositionSource::PositioningMethods LogFilePositionSource::supportedPositioningMethods() const
72 {
73 return AllPositioningMethods;
74 }
75
minimumUpdateInterval() const76 int LogFilePositionSource::minimumUpdateInterval() const
77 {
78 return 500;
79 }
80
startUpdates()81 void LogFilePositionSource::startUpdates()
82 {
83 int interval = updateInterval();
84 if (interval < minimumUpdateInterval())
85 interval = minimumUpdateInterval();
86
87 timer->start(interval);
88 }
89
stopUpdates()90 void LogFilePositionSource::stopUpdates()
91 {
92 timer->stop();
93 }
94
requestUpdate(int)95 void LogFilePositionSource::requestUpdate(int /*timeout*/)
96 {
97 // For simplicity, ignore timeout - assume that if data is not available
98 // now, no data will be added to the file later
99 if (logFile->canReadLine())
100 readNextPosition();
101 else
102 emit updateTimeout();
103 }
104
readNextPosition()105 void LogFilePositionSource::readNextPosition()
106 {
107 QByteArray line = logFile->readLine().trimmed();
108 if (!line.isEmpty()) {
109 QList<QByteArray> data = line.split(' ');
110 double latitude;
111 double longitude;
112 bool hasLatitude = false;
113 bool hasLongitude = false;
114 QDateTime timestamp = QDateTime::fromString(QString(data.value(0)), Qt::ISODate);
115 latitude = data.value(1).toDouble(&hasLatitude);
116 longitude = data.value(2).toDouble(&hasLongitude);
117
118 if (hasLatitude && hasLongitude && timestamp.isValid()) {
119 QGeoCoordinate coordinate(latitude, longitude);
120 QGeoPositionInfo info(coordinate, timestamp);
121 if (info.isValid()) {
122 lastPosition = info;
123 emit positionUpdated(info);
124 }
125 }
126 }
127 }
128
error() const129 QGeoPositionInfoSource::Error LogFilePositionSource::error() const
130 {
131 return QGeoPositionInfoSource::NoError;
132 }
133