liblocation does not work in consol app?

[mismael]

hi everybody;
i wrote a liblocation class and it works fine in any Gui app, but when
i try to apply it in a console application the calss does not work.
is it possible to run liblocation code in console application?

[divanov]

Why not?

#include <glib-object.h>
#include <conic/conic.h>
#include <dbus/dbus-glib-lowlevel.h>

#include <QCoreApplication>
#include <QDebug>

static void
my_connection_handler(ConIcConnection *connection,
                      ConIcConnectionEvent *event,
                      gpointer user_data)
{
    Q_UNUSED(connection);
    Q_UNUSED(user_data);

    qDebug("Connection event has been catched. Leaving.");
    QCoreApplication::quit();
}

int
main (int argc,
      char **argv)
{
    DBusConnection *conn;
    DBusError err;

    dbus_error_init(&err);
    conn = dbus_bus_get(DBUS_BUS_SYSTEM, &err);
    if (conn) {
        /* This is crucial for using conic library */
        dbus_connection_setup_with_g_main(conn, NULL);
    } else {
        qDebug("Unable to connect to the D-BUS daemon: %s", err.message);
        dbus_error_free(&err);
    }

    int ret;
    QCoreApplication app(argc, argv);

    gboolean success = FALSE;
    ConIcConnection *connection = con_ic_connection_new();
    g_signal_connect(G_OBJECT(connection), "connection-event",
                     G_CALLBACK(my_connection_handler), NULL);

    success = con_ic_connection_connect(connection, CON_IC_CONNECT_FLAG_NONE);
    if (!success)
        qDebug("Request for connection failed");
    else
        qDebug("Successful request for connection");

    ret = app.exec();

    success = con_ic_connection_disconnect(connection);
    g_object_unref(connection);

    qDebug("Bye!");

    return ret;
}

[mismael]

Dear ,
liblocation not libconic!

[divanov]

Dear ,
liblocation not libconic!

Well, no difference.

[mismael]

no i used liblocation in a QCoreApplication but it does not work and when i used QApplication
it worked fine .
i think this becuase of the use of g_Signal_connect.

[divanov]

no i used liblocation in a QCoreApplication but it does not work and when i used QApplication
it worked fine .
i think this becuase of the use of g_Signal_connect.

conic example is also using g_signal_connect and it works fine.

[mismael]

here are the code i used with QCoreApplication but does not connect to the gps.

#include "gps.h"
#include <QDebug>
#ifdef Q_WS_HILDON
Gps::Gps(QObject *parent) :
        QObject(parent)
{

    control = location_gpsd_control_get_default();
    device = (LocationGPSDevice *)g_object_new(LOCATION_TYPE_GPS_DEVICE, NULL);
    
    g_object_set(G_OBJECT(control),
                 "preferred-method", LOCATION_METHOD_USER_SELECTED,
                 "preferred-interval", LOCATION_INTERVAL_DEFAULT,
                 NULL);
    
    g_signal_connect(control, "error-verbose", G_CALLBACK(on_error), (Gps*)this);
    g_signal_connect(device, "changed", G_CALLBACK(on_changed), (Gps*)this);
    //g_signal_connect(control, "gpsd-stopped", G_CALLBACK(on_stop), loop);
    //start();
}

Gps::~Gps()
{
    if(control)
        delete control;
    if(device)
        delete device;

}
void on_changed(LocationGPSDevice *device, Gps* data)
{
    if (!device)
        return;
    
    if (device->fix) {
        if (device->fix->fields & LOCATION_GPS_DEVICE_LATLONG_SET && device->fix->eph <= 500000) {
            qDebug("lat = %f, long = %f", device->fix->latitude, device->fix->longitude);
            data->m_longitude = device->fix->longitude;
            data->m_latitude = device->fix->latitude;
            emit data->gpsChanged();
//            qDebug()<<"statlite mode is =========="<<device->fix->mode;
//            qDebug()<<"the status is  ============"<<device->status;
//            qDebug()<<"satalites in view====="<<device->satellites_in_view;
//            qDebug()<<"satalites in use====="<<device->satellites_in_use;
//            qDebug()<<"online ========= "<< device->online;
            qDebug()<<"eph==========="<<device->fix->eph;
        }
        if(device->fix->fields & LOCATION_GPS_DEVICE_TRACK_SET )
        {
            data->m_track = device->fix->track;
        }

    }
}

void Gps::stop()
{
    location_gpsd_control_stop(control);
}
bool Gps::start()
{
    location_gpsd_control_start(control);
    return FALSE;
}
void on_error(LocationGPSDControl *control, LocationGPSDControlError error, Gps* user_data)
{
    switch (error) {
    case LOCATION_ERROR_USER_REJECTED_DIALOG:
        qDebug("User didn't enable requested methods");
        break;
    case LOCATION_ERROR_USER_REJECTED_SETTINGS:
        qDebug("User changed settings, which disabled location");
        break;
    case LOCATION_ERROR_BT_GPS_NOT_AVAILABLE:
        qDebug("Problems with BT GPS");
        break;
    case LOCATION_ERROR_METHOD_NOT_ALLOWED_IN_OFFLINE_MODE:
        qDebug("Requested method is not allowed in offline mode");
        break;
    case LOCATION_ERROR_SYSTEM:
        qDebug("System error");
        break;
    }
}

double Gps::getLatitude()
{
    return m_latitude;
}

double Gps::getLongitude()
{
    return m_longitude;
}

double Gps::getTrack()
{
    return m_track;
}
int Gps::getStatus()
{
    qDebug()<<"int Gps::getStatus()";
    if(device->status == LOCATION_GPS_DEVICE_STATUS_FIX)
        return 1;
    else
        return 0;
}
#endif

the code used in the main func...

QCoreApplication a(argc, argv);

when i used the same code but with QApplication it worked fine .
where are the problem

[vivainio]

the code used in the main func...

QCoreApplication a(argc, argv);

Did you have a.exec() too, so that you'll have the mainloop?

[mismael]

yes i have

return a.exec();

it is a strang thing it shloud work but it did not i think that QCoreApplication may be does not
support g_signal_connect

[vivainio]

it is a strang thing it shloud work but it did not i think that QCoreApplication may be does not
support g_signal_connect

To proceed with troubleshooting - were you running the command line program as root by any chance? Or did you "su - user" before running it?

[mismael]

no, i am not a root user .
i think if you have a time , take my class and try it your self, if it worked tell me what you did.

[vivainio]

no, i am not a root user .
i think if you have a time , take my class and try it your self, if it worked tell me what you did.

Please submit a self-contained example that compiles and I'll take a stab at debugging it.

[divanov]

A working example was submitted to this thread:
http://discussion.forum.nokia.com/fo...d.php?t=194755