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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<a href="#GypsySatellite.synopsis" class="shortcut">Top</a>
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<a href="#GypsySatellite.description" class="shortcut">Description</a>
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<a href="#GypsySatellite.object-hierarchy" class="shortcut">Object Hierarchy</a>
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<a href="#GypsySatellite.properties" class="shortcut">Properties</a>
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<a href="#GypsySatellite.signals" class="shortcut">Signals</a>
</td></tr>
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<div class="refentry" title="GypsySatellite">
<a name="GypsySatellite"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="GypsySatellite.top_of_page"></a>GypsySatellite</span></h2>
<p>GypsySatellite — Object for obtaining satellite information</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv" title="Synopsis">
<a name="GypsySatellite.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
<a class="link" href="GypsySatellite.html#GypsySatellite-struct" title="GypsySatellite">GypsySatellite</a>;
#define <a class="link" href="GypsySatellite.html#GYPSY-SATELLITE-DBUS-INTERFACE--CAPS" title="GYPSY_SATELLITE_DBUS_INTERFACE">GYPSY_SATELLITE_DBUS_INTERFACE</a>
#define <a class="link" href="GypsySatellite.html#GYPSY-SATELLITE-DBUS-SERVICE--CAPS" title="GYPSY_SATELLITE_DBUS_SERVICE">GYPSY_SATELLITE_DBUS_SERVICE</a>
<a class="link" href="GypsySatellite.html#GypsySatelliteDetails" title="GypsySatelliteDetails">GypsySatelliteDetails</a>;
<a class="link" href="GypsySatellite.html" title="GypsySatellite">GypsySatellite</a> * <a class="link" href="GypsySatellite.html#gypsy-satellite-new" title="gypsy_satellite_new ()">gypsy_satellite_new</a> (const char *object_path);
<a
href="http://library.gnome.org/devel/glib/unstable/glib-Pointer-Arrays.html#GPtrArray"
>GPtrArray</a> * <a class="link" href="GypsySatellite.html#gypsy-satellite-get-satellites" title="gypsy_satellite_get_satellites ()">gypsy_satellite_get_satellites</a> (<a class="link" href="GypsySatellite.html" title="GypsySatellite">GypsySatellite</a> *satellite,
<a
href="http://library.gnome.org/devel/glib/unstable/glib-Error-Reporting.html#GError"
>GError</a> **error);
void <a class="link" href="GypsySatellite.html#gypsy-satellite-free-satellite-array" title="gypsy_satellite_free_satellite_array ()">gypsy_satellite_free_satellite_array</a>
(<a
href="http://library.gnome.org/devel/glib/unstable/glib-Pointer-Arrays.html#GPtrArray"
>GPtrArray</a> *satellites);
</pre>
</div>
<div class="refsect1" title="Object Hierarchy">
<a name="GypsySatellite.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
<a
href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"
>GObject</a>
+----GypsySatellite
</pre>
</div>
<div class="refsect1" title="Properties">
<a name="GypsySatellite.properties"></a><h2>Properties</h2>
<pre class="synopsis">
"<a class="link" href="GypsySatellite.html#GypsySatellite--object-path" title='The "object-path" property'>object-path</a>" <a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"
>gchar</a>* : Write / Construct Only
</pre>
</div>
<div class="refsect1" title="Signals">
<a name="GypsySatellite.signals"></a><h2>Signals</h2>
<pre class="synopsis">
"<a class="link" href="GypsySatellite.html#GypsySatellite-satellites-changed" title='The "satellites-changed" signal'>satellites-changed</a>" : Run Last
</pre>
</div>
<div class="refsect1" title="Description">
<a name="GypsySatellite.description"></a><h2>Description</h2>
<p>
<a class="link" href="GypsySatellite.html" title="GypsySatellite"><span class="type">GypsySatellite</span></a> is used whenever the client program wishes to know about
changes in the satellite details. The satellite details contain the satellite
ID number (the PRN), the elevation, the azimuth, the signal-to-noise ratio
(SNR) and whether or not the satellite was used to calculate the fix.
</p>
<p>
A <a class="link" href="GypsySatellite.html" title="GypsySatellite"><span class="type">GypsySatellite</span></a> object is created using <a class="link" href="GypsySatellite.html#gypsy-satellite-new" title="gypsy_satellite_new ()"><code class="function">gypsy_satellite_new()</code></a> using the
D-Bus path of the GPS device. This path is returned from the
<a class="link" href="GypsyControl.html#gypsy-control-create" title="gypsy_control_create ()"><code class="function">gypsy_control_create()</code></a> function. The client can then find out about the
visible satellites with <a class="link" href="GypsySatellite.html#gypsy-satellite-get-satellites" title="gypsy_satellite_get_satellites ()"><code class="function">gypsy_satellite_get_satellites()</code></a> which returns a
GPtrArray containing the <a class="link" href="GypsySatellite.html#GypsySatelliteDetails" title="GypsySatelliteDetails"><span class="type">GypsySatelliteDetails</span></a> for each visible satellite.
Once the client is finished with this GPtrArray
<a class="link" href="GypsySatellite.html#gypsy-satellite-free-satellite-array" title="gypsy_satellite_free_satellite_array ()"><code class="function">gypsy_satellite_free_satellite_array()</code></a> should be used to free the data.
</p>
<p>
As the satellite information changes <a class="link" href="GypsySatellite.html" title="GypsySatellite"><span class="type">GypsySatellite</span></a> will emit the
satellite-changed signal. This signal contains the satellite details in
a GPtrArray. In this case the satellite array does not need to be freed
with <a class="link" href="GypsySatellite.html#gypsy-satellite-free-satellite-array" title="gypsy_satellite_free_satellite_array ()"><code class="function">gypsy_satellite_free_satellite_array()</code></a>.
</p>
<p>
Although gypsy-daemon only emits signals whenever the associated data has
changed, satellite data is constantly changing, so so the satellite-changed
signal will be emitted at a rate of once every second.
</p>
<p>
</p>
<div class="informalexample"><pre class="programlisting">
GypsySatellite *satellite;
GError *error = NULL;
. . .
/ * path comes from the gypsy_control_create() function * /
satellite = gypsy_satellite_new (path);
g_signal_connect (satellite, "satellite-changed", G_CALLBACK (satellite_changed), NULL);
. . .
static void satellite_changed (GypsySatellite *satellite,
GPtrArray *satellites,
gpointer userdata)
{
int i;
for (i = 0; i < satellites->len; i++) {
GypsySatelliteDetails *details = satellites->pdata[i];
g_print ("Satellite %d: %s", details->satellite_id, details->in_use ? "In use" : "Not in use");
}
}
</pre></div>
<p>
</p>
</div>
<div class="refsect1" title="Details">
<a name="GypsySatellite.details"></a><h2>Details</h2>
<div class="refsect2" title="GypsySatellite">
<a name="GypsySatellite-struct"></a><h3>GypsySatellite</h3>
<pre class="programlisting">typedef struct _GypsySatellite GypsySatellite;</pre>
<p>
There are no public fields in <a class="link" href="GypsySatellite.html" title="GypsySatellite"><span class="type">GypsySatellite</span></a>.</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" title="GYPSY_SATELLITE_DBUS_INTERFACE">
<a name="GYPSY-SATELLITE-DBUS-INTERFACE--CAPS"></a><h3>GYPSY_SATELLITE_DBUS_INTERFACE</h3>
<pre class="programlisting">#define GYPSY_SATELLITE_DBUS_INTERFACE "org.freedesktop.Gypsy.Satellite"
</pre>
<p>
A define containing the name of the Satellite interface</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" title="GYPSY_SATELLITE_DBUS_SERVICE">
<a name="GYPSY-SATELLITE-DBUS-SERVICE--CAPS"></a><h3>GYPSY_SATELLITE_DBUS_SERVICE</h3>
<pre class="programlisting">#define GYPSY_SATELLITE_DBUS_SERVICE "org.freedesktop.Gypsy"
</pre>
<p>
A define containing the address of the Satellite service.</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" title="GypsySatelliteDetails">
<a name="GypsySatelliteDetails"></a><h3>GypsySatelliteDetails</h3>
<pre class="programlisting">typedef struct {
int satellite_id;
gboolean in_use;
guint elevation;
guint azimuth;
guint snr;
} GypsySatelliteDetails;
</pre>
<p>
A structure defining a satellite</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term">int <em class="structfield"><code>satellite_id</code></em>;</span></p></td>
<td> The satellite PRN id
</td>
</tr>
<tr>
<td><p><span class="term"><a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"
>gboolean</a> <em class="structfield"><code>in_use</code></em>;</span></p></td>
<td> Whether this satellite was used in calculating the fix
</td>
</tr>
<tr>
<td><p><span class="term"><a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"
>guint</a> <em class="structfield"><code>elevation</code></em>;</span></p></td>
<td> The satellite elevation
</td>
</tr>
<tr>
<td><p><span class="term"><a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"
>guint</a> <em class="structfield"><code>azimuth</code></em>;</span></p></td>
<td> The satellite azimuth
</td>
</tr>
<tr>
<td><p><span class="term"><a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"
>guint</a> <em class="structfield"><code>snr</code></em>;</span></p></td>
<td> The signal to noise ratio
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="gypsy_satellite_new ()">
<a name="gypsy-satellite-new"></a><h3>gypsy_satellite_new ()</h3>
<pre class="programlisting"><a class="link" href="GypsySatellite.html" title="GypsySatellite">GypsySatellite</a> * gypsy_satellite_new (const char *object_path);</pre>
<p>
Creates a new <a class="link" href="GypsySatellite.html" title="GypsySatellite"><span class="type">GypsySatellite</span></a> object that listens for satellite changes
from the GPS found at <em class="parameter"><code>object_path</code></em>.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object_path</code></em> :</span></p></td>
<td> Object path to the GPS device
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> A <a class="link" href="GypsySatellite.html" title="GypsySatellite"><span class="type">GypsySatellite</span></a> object
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="gypsy_satellite_get_satellites ()">
<a name="gypsy-satellite-get-satellites"></a><h3>gypsy_satellite_get_satellites ()</h3>
<pre class="programlisting"><a
href="http://library.gnome.org/devel/glib/unstable/glib-Pointer-Arrays.html#GPtrArray"
>GPtrArray</a> * gypsy_satellite_get_satellites (<a class="link" href="GypsySatellite.html" title="GypsySatellite">GypsySatellite</a> *satellite,
<a
href="http://library.gnome.org/devel/glib/unstable/glib-Error-Reporting.html#GError"
>GError</a> **error);</pre>
<p>
Retrieves the <a class="link" href="GypsySatellite.html#GypsySatelliteDetails" title="GypsySatelliteDetails"><span class="type">GypsySatelliteDetails</span></a> about the satellites that the
GPS is able to see.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>satellite</code></em> :</span></p></td>
<td> A <a class="link" href="GypsySatellite.html" title="GypsySatellite"><span class="type">GypsySatellite</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td> A <a
href="http://library.gnome.org/devel/glib/unstable/glib-Error-Reporting.html#GError"
><span class="type">GError</span></a> for error return
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> A <a
href="http://library.gnome.org/devel/glib/unstable/glib-Pointer-Arrays.html#GPtrArray"
><span class="type">GPtrArray</span></a> of <a class="link" href="GypsySatellite.html#GypsySatelliteDetails" title="GypsySatelliteDetails"><span class="type">GypsySatelliteDetails</span></a> or <a
href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL--CAPS"
><span class="type">NULL</span></a> on error.
Should be freed using <a class="link" href="GypsySatellite.html#gypsy-satellite-free-satellite-array" title="gypsy_satellite_free_satellite_array ()"><code class="function">gypsy_satellite_free_satellite_array()</code></a>.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="gypsy_satellite_free_satellite_array ()">
<a name="gypsy-satellite-free-satellite-array"></a><h3>gypsy_satellite_free_satellite_array ()</h3>
<pre class="programlisting">void gypsy_satellite_free_satellite_array
(<a
href="http://library.gnome.org/devel/glib/unstable/glib-Pointer-Arrays.html#GPtrArray"
>GPtrArray</a> *satellites);</pre>
<p>
Frees all resources used in the array.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>satellites</code></em> :</span></p></td>
<td> <a
href="http://library.gnome.org/devel/glib/unstable/glib-Pointer-Arrays.html#GPtrArray"
><span class="type">GPtrArray</span></a> containing <a class="link" href="GypsySatellite.html#GypsySatelliteDetails" title="GypsySatelliteDetails"><span class="type">GypsySatelliteDetails</span></a>
</td>
</tr></tbody>
</table></div>
</div>
</div>
<div class="refsect1" title="Property Details">
<a name="GypsySatellite.property-details"></a><h2>Property Details</h2>
<div class="refsect2" title='The "object-path" property'>
<a name="GypsySatellite--object-path"></a><h3>The <code class="literal">"object-path"</code> property</h3>
<pre class="programlisting"> "object-path" <a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"
>gchar</a>* : Write / Construct Only</pre>
<p>The DBus path to the object.</p>
<p>Default value: ""</p>
</div>
</div>
<div class="refsect1" title="Signal Details">
<a name="GypsySatellite.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2" title='The "satellites-changed" signal'>
<a name="GypsySatellite-satellites-changed"></a><h3>The <code class="literal">"satellites-changed"</code> signal</h3>
<pre class="programlisting">void user_function (<a class="link" href="GypsySatellite.html" title="GypsySatellite">GypsySatellite</a> *satellites,
<a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"
>gpointer</a> arg1,
<a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"
>gpointer</a> user_data) : Run Last</pre>
<p>
The ::satellites-changed signal is emitted every time the GPS
reports a change in the satellite data.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>satellites</code></em> :</span></p></td>
<td> A <a
href="http://library.gnome.org/devel/glib/unstable/glib-Pointer-Arrays.html#GPtrArray"
><span class="type">GPtrArray</span></a> containing <a class="link" href="GypsySatellite.html#GypsySatelliteDetails" title="GypsySatelliteDetails"><span class="type">GypsySatelliteDetails</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user data set when the signal handler was connected.</td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
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