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MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent), ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    location = new LocationWatcher();
    if (location->source)
    {
       connect(location->source, SIGNAL(positionUpdated(QGeoPositionInfo)),
                this, SLOT(positionUpdated(QGeoPositionInfo)));

     //  ui->label->setText( QString("min %1").arg(location->source->minimumUpdateInterval()) );
    }
}


LocationWatcher::LocationWatcher(QObject *parent)
    : QObject(parent)
{
    source = QGeoPositionInfoSource::createDefaultSource(this);
    enabled = false;
    if (source) {
        source->setPreferredPositioningMethods(QGeoPositionInfoSource::AllPositioningMethods);  //QGeoPositionInfoSource::SatellitePositioningMethods
        source->setUpdateInterval(500); // this is the line that gives me trouble, so I just don't use it
   }
}

void LocationWatcher::enable()
{
    if (source) {
       source->startUpdates();
        enabled = true;
    }
}

void LocationWatcher::disable()
{
    if (source) {
        enabled = false;
        source->stopUpdates();
    }
}