void MainWindow::on_pbGetGPSData_clicked()
{
    int iSatellitesUsed = 0;
    double Longitude = 0;
    gpsmm gps_rec("localhost", "2947");
    if (gps_rec.stream(WATCH_ENABLE|WATCH_JSON) == NULL) {
        cerr << "No GPSD running.\n";
    }
    // Infinite loop
   for (;;)
   {
        struct gps_data_t* newdata;
         if (!gps_rec.waiting(5000000)) // if no new data then skip next block and come back here
            continue;
        if ((newdata = gps_rec.read()) == NULL) //else there is new data, but check its not Null
        {
            ui->leGPSstatus->setText("Read Error");
        }
        else // if not Null then printoutresults
        {
            iSatellitesUsed = newdata->satellites_used;
            Longitude = newdata->fix.longitude;
            if(iSatellitesUsed>0)
                goto updateGPSdata;
        }

     } // infinite loop end

    updateGPSdata:

    int test=0;
    ui->leGPS->setText(QString::number(iSatellitesUsed));
    ui->leGPSlongitude->setText(QString::number(Longitude));

}