/usr/share/gtk-doc/html/geoclue/simple-example.html is in libgeoclue-dev 0.12.0-1ubuntu12.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Using basic Geoclue providers: simple example in C</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
<link rel="home" href="index.html" title="Geoclue Reference Manual">
<link rel="up" href="ch01.html" title="Using Geoclue in applications">
<link rel="prev" href="ch01.html" title="Using Geoclue in applications">
<link rel="next" href="simple-master-example.html" title="Master provider: simple example in C">
<meta name="generator" content="GTK-Doc V1.13 (XML mode)">
<link rel="stylesheet" href="style.css" type="text/css">
<link rel="chapter" href="ch01.html" title="Using Geoclue in applications">
<link rel="reference" href="rn01.html" title="C API">
<link rel="reference" href="rn02.html" title="D-Bus API">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2"><tr valign="middle">
<td><a accesskey="p" href="ch01.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td>
<td><a accesskey="u" href="ch01.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td>
<th width="100%" align="center">Geoclue Reference Manual</th>
<td><a accesskey="n" href="simple-master-example.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td>
</tr></table>
<div class="section" title="Using basic Geoclue providers: simple example in C">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="simple-example"></a>Using basic Geoclue providers: simple example in C</h2></div></div></div>
<p>There are several examples in the geoclue source, these are included here to
give a quick overview.
</p>
<p>
Here is a very simple example of using a specific Geoclue Position provider.
Note that we're using the synchronous version of the method call here, so
geoclue_position_get_position() will block until the response comes (or until D-Bus timeouts).
</p>
<pre class="programlisting">
#include <geoclue/geoclue-position.h>
int main()
{
GeocluePosition *pos;
GeocluePositionFields fields;
double lat, lon;
GError *error = NULL;
g_type_init ();
/* Create the position object */
pos = geoclue_position_new ("org.freedesktop.Geoclue.Providers.Hostip",
"/org/freedesktop/Geoclue/Providers/Hostip");
/* call get_position. Note that unneeded output variables (here
timestamp, altitude and accuracy) can be left NULL */
fields = geoclue_position_get_position (pos, NULL,
&lat, &lon, NULL,
NULL, &error);
if (error) {
g_printerr ("Error in get_position: %s.\n", error->message);
g_error_free (error);
g_object_unref (pos);
return 1;
}
if (fields & GEOCLUE_POSITION_FIELDS_LATITUDE &&
fields & GEOCLUE_POSITION_FIELDS_LONGITUDE) {
g_print ("According to Hostip.info we're at %.3f, %.3f.\n",
lat, lon);
} else {
g_print ("Hostip does not have a valid location available.\nVisit http://www.hostip.info/ to correct this");
}
g_object_unref (pos);
return 0;
}
</pre>
<p>Save as test-hostip.c and compile with
</p>
<pre class="programlisting">
gcc `pkg-config --libs --cflags geoclue` -o test-hostip test-hostip.c
</pre>
<p>Here is a similarly simple example using GLib mainloop and Gypsy provider with
position-changed signals:
</p>
<pre class="programlisting">
#include <geoclue/geoclue-position.h>
/* device name or bluetooth address */
#define GPS_DEVICE_NAME "00:02:76:C5:81:BF"
static void
position_changed (GeocluePosition *position,
GeocluePositionFields fields,
int timestamp,
double latitude,
double longitude,
double altitude,
GeoclueAccuracy *accuracy,
gpointer userdata)
{
g_print ("Position changed:\n");
if (fields & GEOCLUE_POSITION_FIELDS_LATITUDE &&
fields & GEOCLUE_POSITION_FIELDS_LONGITUDE) {
g_print ("\t%f, %f\n\n", latitude, longitude);
} else {
g_print ("\tLatitude and longitude not available.\n\n");
}
}
int main()
{
GMainLoop *loop;
GHashTable *options;
GeocluePosition *pos;
GError *error = NULL;
g_type_init ();
/* Create the position object */
pos = geoclue_position_new ("org.freedesktop.Geoclue.Providers.Gypsy",
"/org/freedesktop/Geoclue/Providers/Gypsy");
/* Set GPS device name option for Gypsy */
options = g_hash_table_new (g_str_hash, g_str_equal);
g_hash_table_insert (options, "org.freedesktop.Geoclue.GPSDevice", GPS_DEVICE_NAME);
if (!geoclue_provider_set_options (GEOCLUE_PROVIDER (pos), options, &error)) {
g_printerr ("Error setting options: %s\n", error->message);
g_error_free (error);
g_hash_table_destroy (options);
g_object_unref (pos);
return 1;
}
g_hash_table_destroy (options);
/* connect to signal */
g_signal_connect (G_OBJECT (pos), "position-changed",
G_CALLBACK (position_changed), NULL);
g_print ("Waiting for position change signals...\n");
loop = g_main_loop_new (NULL, FALSE);
g_main_loop_run (loop);
g_main_loop_unref (loop);
g_object_unref (pos);
return 0;
}
</pre>
</div>
<div class="footer">
<hr>
Generated by GTK-Doc V1.13</div>
</body>
</html>
|