Maemo 5 liblocation minimalistic test application

Comments

Moderator note;- when expressed "on console" we would assume in the emulator. Which produces the standard location

To run this on a phone requires more code as the console will not open on many Symbian phones

Jim Gilmour

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Article

Created: divanov (20 May 2010)

Last edited: hamishwillee (11 Oct 2012)

While more extended example with UI exists here: Qt for Maemo: Location Example sometimes we need a minimalistic test application for investigation purposes. This application simply prints out information obtained from liblocation to the console.

#include <QCoreApplication>
#include <QDebug>
 
extern "C" {
#include <location/location-gps-device.h>
#include <location/location-gpsd-control.h>
}
 
static void printLocationInfo(LocationGPSDevice *device, const char *label)
{
    qDebug() << QString("%1:\n"
                 "time:\t%2\nept:\t%3\nlat:\t%4\nlong:\t%5\neph:\t%6\nspeed:\%7\neps:\t%8\ntrack:\t%9\nepd:\t%10\nsatellites:\t%11\n")
                .arg(label)
                .arg(device->fix->time)
                .arg(device->fix->ept)
                .arg(device->fix->latitude)
                .arg(device->fix->longitude)
                .arg(device->fix->eph)
                .arg(device->fix->speed)
                .arg(device->fix->eps)
                .arg(device->fix->track)
                .arg(device->fix->epd)
                .arg(device->satellites_in_use);
}
 
static void changed(LocationGPSDevice *device, gpointer userdata)
{
    Q_UNUSED(userdata);
 
    printLocationInfo(device, "CHANGED");
}
 
static void connected(LocationGPSDevice *device, gpointer userdata)
{
    Q_UNUSED(userdata);
 
    printLocationInfo(device, "CONNECTED");
}
 
static void disconnected(LocationGPSDevice *device, gpointer userdata)
{
    Q_UNUSED(userdata);
 
    printLocationInfo(device, "DISCONNECTED");
}
 
int main(int argc, char *argv[])
{
    QCoreApplication app(argc, argv);
    LocationGPSDevice *device;
    LocationGPSDControl *control;
 
    g_type_init ();
 
    control = location_gpsd_control_get_default();
    if (control)
        location_gpsd_control_start(control);
 
    device = (LocationGPSDevice*)g_object_new(LOCATION_TYPE_GPS_DEVICE, NULL);
    if (device) {
        g_signal_connect(device, "changed", G_CALLBACK(changed), 0);
        g_signal_connect(device, "connected", G_CALLBACK(connected), 0);
        g_signal_connect(device, "disconnected", G_CALLBACK(disconnected), 0);
    }
 
    int ret = app.exec();
 
    if (device)
        g_object_unref(device);
    if (control)
        location_gpsd_control_stop(control);
 
    return ret;
}

Do not forget to add to your .pro file:

CONFIG += link_pkgconfig
PKGCONFIG += liblocation