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/*
* Geoclue
* master-example.c - Example using the Master client API
*
* Authors: Iain Holmes <iain@openedhand.com>
* Jussi Kukkonen <jku@o-hand.com>
* Copyright 2008 by Garmin Ltd. or its subsidiaries
* 2008 OpenedHand Ltd
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
*/
/* This example shows typical GPS-like usage. Following params are
* given to geoclue_master_client_set_requirements():
* min_accuracy = GEOCLUE_ACCURACY_LEVEL_DETAILED
* We require the highest level of accuracy
* min_time = 0
* No limit on frequency of position-changed signals
* (this is not actually implemented yet)
* require_updates = TRUE
* We need position-changed signals
* allowed_resources = GEOCLUE_RESOURCE_ALL
* Any available resource can be used
*
* Geoclue master will try to select a suitable provider based on these
* requirements -- currently only Gypsy and Gpsd providers fulfill
* the above requiremens. Gpsd-provider should work out-of-the-box as
* long as gpsd is running in the default port. Gypsy provider requires
* that you set device name in the options: see README for details.
*
*/
#include <string.h>
#include <geoclue/geoclue-master.h>
#include <geoclue/geoclue-position.h>
static void
provider_changed_cb (GeoclueMasterClient *client,
char *iface,
char *name,
char *description,
gpointer userdata)
{
if (strlen (name) == 0) {
g_print ("No provider available\n");
} else {
g_print ("now using provider: %s\n", name);
}
}
static void
position_changed_cb (GeocluePosition *position,
GeocluePositionFields fields,
int timestamp,
double latitude,
double longitude,
double altitude,
GeoclueAccuracy *accuracy,
gpointer userdata)
{
if (fields & GEOCLUE_POSITION_FIELDS_LATITUDE &&
fields & GEOCLUE_POSITION_FIELDS_LONGITUDE) {
GeoclueAccuracyLevel level;
geoclue_accuracy_get_details (accuracy, &level, NULL, NULL);
g_print ("got position (accuracy level %d):\n", level);
g_print ("\t%f, %f\n", latitude, longitude);
} else {
g_print ("position emitted, but latitude and longitude are not valid.\n");
}
}
int
main (int argc,
char **argv)
{
GError *error = NULL;
GMainLoop *mainloop;
GeoclueMaster *master;
GeoclueMasterClient *client;
GeocluePosition *position;
g_type_init ();
master = geoclue_master_get_default ();
client = geoclue_master_create_client (master, NULL, NULL);
g_object_unref (master);
g_signal_connect (G_OBJECT (client), "position-provider-changed",
G_CALLBACK (provider_changed_cb), NULL);
/* We want provider that has detailed accuracy and emits signals.
* The provider is allowed to use any resources available. */
if (!geoclue_master_client_set_requirements (client,
GEOCLUE_ACCURACY_LEVEL_DETAILED,
0, TRUE,
GEOCLUE_RESOURCE_ALL,
NULL)){
g_printerr ("Setting requirements failed");
g_object_unref (client);
return 1;
}
position = geoclue_master_client_create_position (client, &error);
if (!position) {
g_warning ("Creating GeocluePosition failed: %s", error->message);
g_error_free (error);
g_object_unref (client);
return 1;
}
g_signal_connect (G_OBJECT (position), "position-changed",
G_CALLBACK (position_changed_cb), NULL);
mainloop = g_main_loop_new (NULL, FALSE);
g_main_loop_run (mainloop);
g_main_loop_unref (mainloop);
g_object_unref (client);
g_object_unref (position);
return 0;
}
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