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/*
* Geoclue
* position-example.c - Example using the Position client API
*
* Author: Jussi Kukkonen <jku@openedhand.com>
* Copyright 2007 by Garmin Ltd. or its subsidiaries
*
* 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.
*
*/
#include <glib.h>
#include <geoclue/geoclue-position.h>
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;
double horiz_acc;
geoclue_accuracy_get_details (accuracy, &level, &horiz_acc, NULL);
g_print ("Current position:\n");
g_print ("\t%f, %f\n", latitude, longitude);
g_print ("\tAccuracy level %d (%.0f meters)\n", level, horiz_acc);
} else {
g_print ("Latitude and longitude not available.\n");
}
}
static GHashTable *
parse_options (int argc,
char **argv)
{
GHashTable *options;
int i;
options = g_hash_table_new (g_str_hash, g_str_equal);
for (i = 2; i < argc; i += 2) {
g_hash_table_insert (options, argv[i], argv[i + 1]);
}
return options;
}
int main (int argc, char** argv)
{
gchar *service, *path;
GeocluePosition *pos = NULL;
GeocluePositionFields fields;
int timestamp;
double lat, lon;
GeoclueAccuracy *accuracy = NULL;
GMainLoop *mainloop;
GError *error = NULL;
g_type_init();
if (argc < 2 || argc % 2 != 0) {
g_printerr ("Usage:\n position-example <provider_name> [option,value]\n");
return 1;
}
g_print ("Using provider '%s'\n", argv[1]);
service = g_strdup_printf ("org.freedesktop.Geoclue.Providers.%s", argv[1]);
path = g_strdup_printf ("/org/freedesktop/Geoclue/Providers/%s", argv[1]);
mainloop = g_main_loop_new (NULL, FALSE);
/* Create new GeocluePosition */
pos = geoclue_position_new (service, path);
if (pos == NULL) {
g_printerr ("Error while creating GeocluePosition object.\n");
return 1;
}
g_free (service);
g_free (path);
if (argc > 2) {
GHashTable *options;
options = parse_options (argc, argv);
if (!geoclue_provider_set_options (GEOCLUE_PROVIDER (pos), options, &error)) {
g_printerr ("Error setting options: %s\n",
error->message);
g_error_free (error);
error = NULL;
}
g_hash_table_destroy (options);
}
/* Query current position. We're not interested in altitude
this time, so leave it NULL. Same can be done with all other
arguments that aren't interesting to the client */
fields = geoclue_position_get_position (pos, ×tamp,
&lat, &lon, NULL,
&accuracy, &error);
if (error) {
g_printerr ("Error getting position: %s\n", error->message);
g_error_free (error);
g_object_unref (pos);
return 1;
}
/* Print out coordinates if they are valid */
if (fields & GEOCLUE_POSITION_FIELDS_LATITUDE &&
fields & GEOCLUE_POSITION_FIELDS_LONGITUDE) {
GeoclueAccuracyLevel level;
double horiz_acc;
geoclue_accuracy_get_details (accuracy, &level, &horiz_acc, NULL);
g_print ("Current position:\n");
g_print ("\t%f, %f\n", lat, lon);
g_print ("\tAccuracy level %d (%.0f meters)\n", level, horiz_acc);
} else {
g_print ("Latitude and longitude not available.\n");
}
geoclue_accuracy_free (accuracy);
g_signal_connect (G_OBJECT (pos), "position-changed",
G_CALLBACK (position_changed_cb), NULL);
g_main_loop_run (mainloop);
return 0;
}
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