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/*
* Geoclue
* master-example.c - Example using the Master client API
*
* Author: Iain Holmes <iain@openedhand.com>
* Copyright 2008 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.
*
*/
/* This example uses geoclue master to get approximate position
* and address signals. Following params are
* given to geoclue_master_client_set_requirements():
* min_accuracy = GEOCLUE_ACCURACY_LEVEL_LOCALITY
* Locality means a city or a town. Expect coordinates
* to routinely have 10-20 km error.
* min_time = 0
* No limit on frequency of position-changed signals
* (this is not actually implemented yet)
* require_updates = TRUE
* We want position-changed and address-changed signals
* allowed_resources = GEOCLUE_RESOURCE_NETWORK
* Web services may be used but e.g. GPS is off limits
*
* To ensure at least one working provider for your testing, visit
* hostip.info and define your IPs location if it's not set or is
* marked as "guessed"
*
* */
#include <geoclue/geoclue-master.h>
#include <geoclue/geoclue-address.h>
#include <geoclue/geoclue-position.h>
/* Provider methods */
static void
provider_changed_cb (GeoclueMasterClient *client,
char *name,
char *description,
char *service,
char *path,
gpointer userdata)
{
g_print ("%s provider changed: %s\n", (char *)userdata, name);
}
/* Address methods */
static void
print_address_key_and_value (char *key, char *value, gpointer user_data)
{
g_print ("\t%s: %s\n", key, value);
}
static void
address_changed_cb (GeoclueAddress *address,
int timestamp,
GHashTable *details,
GeoclueAccuracy *accuracy)
{
GeoclueAccuracyLevel level;
geoclue_accuracy_get_details (accuracy, &level, NULL, NULL);
g_print ("New address (accuracy level %d):\n", level);
g_hash_table_foreach (details, (GHFunc)print_address_key_and_value, NULL);
g_print ("\n");
}
static GeoclueAddress *
init_address (GeoclueMasterClient *client)
{
GError *error = NULL;
GeoclueAddress *address;
GHashTable *details = NULL;
GeoclueAccuracyLevel level;
GeoclueAccuracy *accuracy = NULL;
int timestamp = 0;
/* create the object and connect to signal */
address = geoclue_master_client_create_address (client, &error);
if (!address) {
g_warning ("Creating GeoclueAddress failed: %s", error->message);
g_error_free (error);
return NULL;
}
g_signal_connect (G_OBJECT (address), "address-changed",
G_CALLBACK (address_changed_cb), NULL);
/* print initial address */
if (!geoclue_address_get_address (address, ×tamp,
&details, &accuracy,
&error)) {
g_printerr ("Error getting address: %s\n", error->message);
g_error_free (error);
} else {
geoclue_accuracy_get_details (accuracy, &level, NULL, NULL);
g_print ("Current address: (accuracy level %d):\n", level);
g_hash_table_foreach (details, (GHFunc)print_address_key_and_value, NULL);
g_print ("\n");
g_hash_table_destroy (details);
geoclue_accuracy_free (accuracy);
}
return address;
}
/* Position methods */
static void
position_changed_cb (GeocluePosition *position,
GeocluePositionFields fields,
int timestamp,
double latitude,
double longitude,
double altitude,
GeoclueAccuracy *accuracy,
gpointer userdata)
{
GeoclueAccuracyLevel level;
geoclue_accuracy_get_details (accuracy, &level, NULL, NULL);
g_print ("New position (accuracy level %d):\n", level);
if (fields & GEOCLUE_POSITION_FIELDS_LATITUDE &&
fields & GEOCLUE_POSITION_FIELDS_LONGITUDE) {
g_print ("\t%f, %f\n\n", latitude, longitude);
} else {
g_print ("\nlatitude and longitude not valid.\n");
}
}
static GeocluePosition *
init_position (GeoclueMasterClient *client)
{
GeocluePosition *position;
GError *error = NULL;
GeocluePositionFields fields;
double lat = 0.0, lon = 0.0;
GeoclueAccuracy *accuracy;
position = geoclue_master_client_create_position (client, &error);
if (!position) {
g_warning ("Creating GeocluePosition failed: %s", error->message);
g_error_free (error);
return NULL;
}
g_signal_connect (G_OBJECT (position), "position-changed",
G_CALLBACK (position_changed_cb), NULL);
/*print initial position */
fields = geoclue_position_get_position (position, NULL,
&lat, &lon, NULL,
&accuracy, &error);
if (error != NULL) {
g_warning ("%s", error->message);
g_error_free (error);
} else {
GeoclueAccuracyLevel level;
geoclue_accuracy_get_details (accuracy, &level, NULL, NULL);
g_print ("New position (accuracy level %d):\n", level);
if (fields & GEOCLUE_POSITION_FIELDS_LATITUDE &&
fields & GEOCLUE_POSITION_FIELDS_LONGITUDE) {
g_print ("\t%f, %f\n\n", lat, lon);
} else {
g_print ("\nlatitude and longitude not valid.\n");
}
geoclue_accuracy_free (accuracy);
}
return position;
}
int
main (int argc,
char **argv)
{
GeoclueMaster *master;
GeoclueMasterClient *client;
GeocluePosition *pos;
GeoclueAddress *addr;
GMainLoop *mainloop;
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), "address-provider-changed",
G_CALLBACK (provider_changed_cb), "Address");
g_signal_connect (G_OBJECT (client), "position-provider-changed",
G_CALLBACK (provider_changed_cb), "Position");
if (!geoclue_master_client_set_requirements (client,
GEOCLUE_ACCURACY_LEVEL_LOCALITY,
0,
TRUE,
GEOCLUE_RESOURCE_NETWORK,
NULL)){
g_printerr ("set_requirements failed");
g_object_unref (client);
return 1;
}
addr = init_address (client);
pos = init_position (client);
mainloop = g_main_loop_new (NULL, FALSE);
g_main_loop_run (mainloop);
g_main_loop_unref (mainloop);
g_object_unref (pos);
g_object_unref (addr);
g_object_unref (client);
return 0;
}
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