void TrackRecorder::exportGpx(QString name, QString desc, QString type) {
qDebug()<<"Exporting track to gpx";
if(m_points.size() < 1) {
qDebug()<<"Nothing to save";
return; // Nothing to save
}
QString homeDir = QStandardPaths::writableLocation(QStandardPaths::HomeLocation);
QString subDir = "Rena";
QString filename;
if(!name.isEmpty()) {
filename = m_points.at(0).timestamp().toUTC().toString(Qt::ISODate)
+ " - " + name + ".gpx";
} else {
filename = m_points.at(0).timestamp().toUTC().toString(Qt::ISODate)
+ ".gpx";
}
qDebug()<<"File:"<<homeDir<<"/"<<subDir<<"/"<<filename;
QDir home = QDir(homeDir);
if(!home.exists(subDir)) {
qDebug()<<"Directory does not exist, creating";
if(home.mkdir(subDir)) {
qDebug()<<"Directory created";
} else {
qDebug()<<"Directory creation failed, aborting";
return;
}
}
QSaveFile file;
file.setFileName(homeDir + "/" + subDir + "/" + filename);
if(!file.open(QIODevice::WriteOnly | QIODevice::Text)) {
qDebug()<<"File opening failed, aborting";
return;
}
QXmlStreamWriter xml;
xml.setDevice(&file);
xml.setAutoFormatting(true); // Human readable output
xml.writeStartDocument();
xml.writeDefaultNamespace("http://www.topografix.com/GPX/1/1");
xml.writeStartElement("gpx");
xml.writeAttribute("version", "1.1");
xml.writeAttribute("Creator", "Rena for Sailfish");
// Now this is a bit redundant, but to be able to write the totals in the metadata section we do need to loop
// through the whole pointset here...
qreal duration = 0;
qreal distance = 0;
qreal avg_speed = 0;
qreal max_speed = 0;
QDateTime start_time(m_points.at(0).timestamp());
QDateTime stop_time(m_points.at(m_points.size()-1).timestamp());
duration = start_time.secsTo(stop_time);
for(int i=1 ; i < m_points.size(); i++) {
if(m_points.at(i-1).coordinate().type() != QGeoCoordinate::Coordinate3D) {
break; // No position info, skip this point
}
QGeoCoordinate first(m_points.at(i-1).coordinate().latitude(), m_points.at(i-1).coordinate().longitude());
QGeoCoordinate second(m_points.at(i).coordinate().latitude(), m_points.at(i).coordinate().longitude());
distance += first.distanceTo(second);
if(m_points.at(i).attribute(QGeoPositionInfo::GroundSpeed) > max_speed) {
max_speed = m_points.at(i).attribute(QGeoPositionInfo::GroundSpeed);
}
}
if(distance == 0 || duration == 0) {
avg_speed = 0;
} else {
avg_speed = distance / duration;
}
xml.writeStartElement("metadata");
if(!name.isEmpty()) {
xml.writeTextElement("name", name);
}
if(!desc.isEmpty()) {
xml.writeTextElement("desc", desc);
}
if(!type.isEmpty()) {
xml.writeTextElement("type", type);
}
xml.writeTextElement("duration", QString::number(duration));
xml.writeTextElement("distance", QString::number(distance));
xml.writeTextElement("avg_speed", QString::number(avg_speed));
xml.writeTextElement("max_speed", QString::number(max_speed));
xml.writeEndElement(); // metadata
xml.writeStartElement("trk");
xml.writeStartElement("trkseg");
for(int i=0 ; i < m_points.size(); i++) {
if(m_points.at(i).coordinate().type() == QGeoCoordinate::InvalidCoordinate) {
break; // No position info, skip this point
}
xml.writeStartElement("trkpt");
xml.writeAttribute("lat", QString::number(m_points.at(i).coordinate().latitude(), 'g', 15));
xml.writeAttribute("lon", QString::number(m_points.at(i).coordinate().longitude(), 'g', 15));
xml.writeTextElement("time", m_points.at(i).timestamp().toUTC().toString(Qt::ISODate));
if(m_points.at(i).coordinate().type() == QGeoCoordinate::Coordinate3D) {
xml.writeTextElement("ele", QString::number(m_points.at(i).coordinate().altitude(), 'g', 15));
}
xml.writeStartElement("extensions");
if(m_points.at(i).hasAttribute(QGeoPositionInfo::Direction)) {
xml.writeTextElement("dir", QString::number(m_points.at(i).attribute(QGeoPositionInfo::Direction), 'g', 15));
}
if(m_points.at(i).hasAttribute(QGeoPositionInfo::GroundSpeed)) {
xml.writeTextElement("g_spd", QString::number(m_points.at(i).attribute(QGeoPositionInfo::GroundSpeed), 'g', 15));
}
if(m_points.at(i).hasAttribute(QGeoPositionInfo::VerticalSpeed)) {
xml.writeTextElement("v_spd", QString::number(m_points.at(i).attribute(QGeoPositionInfo::VerticalSpeed), 'g', 15));
}
if(m_points.at(i).hasAttribute(QGeoPositionInfo::MagneticVariation)) {
xml.writeTextElement("m_var", QString::number(m_points.at(i).attribute(QGeoPositionInfo::MagneticVariation), 'g', 15));
}
if(m_points.at(i).hasAttribute(QGeoPositionInfo::HorizontalAccuracy)) {
xml.writeTextElement("h_acc", QString::number(m_points.at(i).attribute(QGeoPositionInfo::HorizontalAccuracy), 'g', 15));
}
if(m_points.at(i).hasAttribute(QGeoPositionInfo::VerticalAccuracy)) {
xml.writeTextElement("v_acc", QString::number(m_points.at(i).attribute(QGeoPositionInfo::VerticalAccuracy), 'g', 15));
}
xml.writeEndElement(); // extensions
xml.writeEndElement(); // trkpt
}
xml.writeEndElement(); // trkseg
xml.writeEndElement(); // trk
xml.writeEndElement(); // gpx
xml.writeEndDocument();
file.commit();
if(file.error()) {
qDebug()<<"Error in writing to a file";
qDebug()<<file.errorString();
} else {
QDir renaDir = QDir(homeDir + "/" + subDir);
renaDir.remove("Autosave");
}
}
