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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>GypsyPosition</title>
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<tr><td colspan="5" class="shortcuts">
<a href="#GypsyPosition.synopsis" class="shortcut">Top</a>
                   | 
                  <a href="#GypsyPosition.description" class="shortcut">Description</a>
                   | 
                  <a href="#GypsyPosition.object-hierarchy" class="shortcut">Object Hierarchy</a>
                   | 
                  <a href="#GypsyPosition.properties" class="shortcut">Properties</a>
                   | 
                  <a href="#GypsyPosition.signals" class="shortcut">Signals</a>
</td></tr>
</table>
<div class="refentry" title="GypsyPosition">
<a name="GypsyPosition"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="GypsyPosition.top_of_page"></a>GypsyPosition</span></h2>
<p>GypsyPosition — Object for obtaining positions from gypsy-daemon</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv" title="Synopsis">
<a name="GypsyPosition.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">                    <a class="link" href="GypsyPosition.html#GypsyPosition-struct" title="GypsyPosition">GypsyPosition</a>;
#define             <a class="link" href="GypsyPosition.html#GYPSY-POSITION-DBUS-INTERFACE:CAPS" title="GYPSY_POSITION_DBUS_INTERFACE">GYPSY_POSITION_DBUS_INTERFACE</a>
#define             <a class="link" href="GypsyPosition.html#GYPSY-POSITION-DBUS-SERVICE:CAPS" title="GYPSY_POSITION_DBUS_SERVICE">GYPSY_POSITION_DBUS_SERVICE</a>
enum                <a class="link" href="GypsyPosition.html#GypsyPositionFields" title="enum GypsyPositionFields">GypsyPositionFields</a>;
<a class="link" href="GypsyPosition.html" title="GypsyPosition"><span class="returnvalue">GypsyPosition</span></a> *     <a class="link" href="GypsyPosition.html#gypsy-position-new" title="gypsy_position_new ()">gypsy_position_new</a>                  (<em class="parameter"><code>const <span class="type">char</span> *object_path</code></em>);
<a class="link" href="GypsyPosition.html#GypsyPositionFields" title="enum GypsyPositionFields"><span class="returnvalue">GypsyPositionFields</span></a>  <a class="link" href="GypsyPosition.html#gypsy-position-get-position" title="gypsy_position_get_position ()">gypsy_position_get_position</a>        (<em class="parameter"><code><a class="link" href="GypsyPosition.html" title="GypsyPosition"><span class="type">GypsyPosition</span></a> *position</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> *timestamp</code></em>,
                                                         <em class="parameter"><code><span class="type">double</span> *latitude</code></em>,
                                                         <em class="parameter"><code><span class="type">double</span> *longitude</code></em>,
                                                         <em class="parameter"><code><span class="type">double</span> *altitude</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);
</pre>
</div>
<div class="refsect1" title="Object Hierarchy">
<a name="GypsyPosition.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
  <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a>
   +----GypsyPosition
</pre>
</div>
<div class="refsect1" title="Properties">
<a name="GypsyPosition.properties"></a><h2>Properties</h2>
<pre class="synopsis">
  "<a class="link" href="GypsyPosition.html#GypsyPosition--object-path" title='The "object-path" property'>object-path</a>"              <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a>*                : Write / Construct Only
</pre>
</div>
<div class="refsect1" title="Signals">
<a name="GypsyPosition.signals"></a><h2>Signals</h2>
<pre class="synopsis">
  "<a class="link" href="GypsyPosition.html#GypsyPosition-position-changed" title='The "position-changed" signal'>position-changed</a>"                               : Run First / No Recursion
</pre>
</div>
<div class="refsect1" title="Description">
<a name="GypsyPosition.description"></a><h2>Description</h2>
<p>
<a class="link" href="GypsyPosition.html" title="GypsyPosition"><span class="type">GypsyPosition</span></a> is used whenever the client program wishes to know about
GPS position changes. It can report the current position, and has a signal
to notify listeners of changes.
</p>
<p>
A <a class="link" href="GypsyPosition.html" title="GypsyPosition"><span class="type">GypsyPosition</span></a> object is created using <a class="link" href="GypsyPosition.html#gypsy-position-new" title="gypsy_position_new ()"><code class="function">gypsy_position_new()</code></a> using the 
D-Bus path of the GPS device. This path is returned from the 
<a class="link" href="gypsy-gypsy-control.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
position with <a class="link" href="GypsyPosition.html#gypsy-position-get-position" title="gypsy_position_get_position ()"><code class="function">gypsy_position_get_position()</code></a>.
</p>
<p>
As the position information changes <a class="link" href="GypsyPosition.html" title="GypsyPosition"><span class="type">GypsyPosition</span></a> will emit the 
position-changed signal. This signal contains the fix position if 
gypsy-daemon knows it. It has a fields paramater which is a bitmask of
<a class="link" href="GypsyPosition.html#GypsyPositionFields" title="enum GypsyPositionFields"><span class="type">GypsyPositionFields</span></a> which indicates which of the latitude, longitude or
altitude contains valid information. The timestamp will always be valid
if it is greater than 0.
</p>
<p>
</p>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1
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21</pre></td>
        <td class="listing_code"><pre class="programlisting">GypsyPosition <span class="symbol">*</span>position<span class="symbol">;</span>
GError <span class="symbol">*</span>error <span class="symbol">=</span> NULL<span class="symbol">;</span>

<span class="symbol">. . .</span>

<span class="symbol">/ *</span> path comes from the <span class="function"><a href="gypsy-gypsy-control.html#gypsy-control-create">gypsy_control_create</a></span><span class="symbol">()</span> function <span class="symbol">* /</span>
position <span class="symbol">=</span> <span class="function"><a href="GypsyPosition.html#gypsy-position-new">gypsy_position_new</a></span> <span class="symbol">(</span>path<span class="symbol">);</span>
<span class="function"><a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#g-signal-connect">g_signal_connect</a></span> <span class="symbol">(</span>position<span class="symbol">,</span> <span class="string">&quot;position-changed&quot;</span><span class="symbol">,</span> <span class="function"><a href="/usr/share/gtk-doc/html/gobject/gobject-Closures.html#G-CALLBACK:CAPS">G_CALLBACK</a></span> <span class="symbol">(</span>position_changed<span class="symbol">),</span> NULL<span class="symbol">);</span>

<span class="symbol">. . .</span>

<span class="gtkdoc kwb">static void</span> <span class="function">position_changed</span> <span class="symbol">(</span>GypsyPosition <span class="symbol">*</span>position<span class="symbol">,</span> 
GypsyPositionFields fields<span class="symbol">,</span>
<span class="gtkdoc kwb">int</span> timestamp<span class="symbol">,</span>
<span class="gtkdoc kwb">double</span> latitude<span class="symbol">,</span>
<span class="gtkdoc kwb">double</span> longitude<span class="symbol">,</span>
<span class="gtkdoc kwb">double</span> altitude<span class="symbol">,</span>
gpointer userdata<span class="symbol">)</span>
<span class="symbol">{</span>
  <span class="function"><a href="/usr/share/gtk-doc/html/glib/glib-Warnings-and-Assertions.html#g-print">g_print</a></span> <span class="symbol">(</span><span class="string">&quot;latitude, longitude (%f, %f)</span><span class="gtkdoc esc">\n</span><span class="string">&quot;</span><span class="symbol">, (</span>fields <span class="symbol">&amp;</span> GYPSY_POSITION_FIELDS_LATITUDE<span class="symbol">)</span> ? latitude <span class="symbol">: -</span><span class="number">1.0</span><span class="symbol">, (</span>fields <span class="symbol">&amp;</span> GYPSY_POSITION_FIELDS_LONGITUDE<span class="symbol">)</span> ? longitude <span class="symbol">: -</span><span class="number">1.0</span><span class="symbol">);</span>
<span class="symbol">}</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p>
</p>
</div>
<div class="refsect1" title="Details">
<a name="GypsyPosition.details"></a><h2>Details</h2>
<div class="refsect2" title="GypsyPosition">
<a name="GypsyPosition-struct"></a><h3>GypsyPosition</h3>
<pre class="programlisting">typedef struct _GypsyPosition GypsyPosition;</pre>
<p>
There are no public fields in <a class="link" href="GypsyPosition.html" title="GypsyPosition"><span class="type">GypsyPosition</span></a>.
</p>
</div>
<hr>
<div class="refsect2" title="GYPSY_POSITION_DBUS_INTERFACE">
<a name="GYPSY-POSITION-DBUS-INTERFACE:CAPS"></a><h3>GYPSY_POSITION_DBUS_INTERFACE</h3>
<pre class="programlisting">#define GYPSY_POSITION_DBUS_INTERFACE "org.freedesktop.Gypsy.Position"
</pre>
<p>
A define containing the name of the Position interface
</p>
</div>
<hr>
<div class="refsect2" title="GYPSY_POSITION_DBUS_SERVICE">
<a name="GYPSY-POSITION-DBUS-SERVICE:CAPS"></a><h3>GYPSY_POSITION_DBUS_SERVICE</h3>
<pre class="programlisting">#define GYPSY_POSITION_DBUS_SERVICE "org.freedesktop.Gypsy"
</pre>
<p>
A define containing the address of the Position service
</p>
</div>
<hr>
<div class="refsect2" title="enum GypsyPositionFields">
<a name="GypsyPositionFields"></a><h3>enum GypsyPositionFields</h3>
<pre class="programlisting">typedef enum {
	GYPSY_POSITION_FIELDS_NONE = 0,
	GYPSY_POSITION_FIELDS_LATITUDE = 1 &lt;&lt; 0,
	GYPSY_POSITION_FIELDS_LONGITUDE = 1 &lt;&lt; 1,
	GYPSY_POSITION_FIELDS_ALTITUDE = 1 &lt;&lt; 2
} GypsyPositionFields;
</pre>
<p>
A bitmask telling which fields in the position_changed callback are valid
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="GYPSY-POSITION-FIELDS-NONE:CAPS"></a><span class="term"><code class="literal">GYPSY_POSITION_FIELDS_NONE</code></span></p></td>
<td>None of the fields are valid
</td>
</tr>
<tr>
<td><p><a name="GYPSY-POSITION-FIELDS-LATITUDE:CAPS"></a><span class="term"><code class="literal">GYPSY_POSITION_FIELDS_LATITUDE</code></span></p></td>
<td>The latitude field is valid
</td>
</tr>
<tr>
<td><p><a name="GYPSY-POSITION-FIELDS-LONGITUDE:CAPS"></a><span class="term"><code class="literal">GYPSY_POSITION_FIELDS_LONGITUDE</code></span></p></td>
<td>The longitude field is valid
</td>
</tr>
<tr>
<td><p><a name="GYPSY-POSITION-FIELDS-ALTITUDE:CAPS"></a><span class="term"><code class="literal">GYPSY_POSITION_FIELDS_ALTITUDE</code></span></p></td>
<td>The altitude field is valid
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="gypsy_position_new ()">
<a name="gypsy-position-new"></a><h3>gypsy_position_new ()</h3>
<pre class="programlisting"><a class="link" href="GypsyPosition.html" title="GypsyPosition"><span class="returnvalue">GypsyPosition</span></a> *     gypsy_position_new                  (<em class="parameter"><code>const <span class="type">char</span> *object_path</code></em>);</pre>
<p>
Creates a new <a class="link" href="GypsyPosition.html" title="GypsyPosition"><span class="type">GypsyPosition</span></a> object that listens for position changes
from the GPS found at <em class="parameter"><code>object_path</code></em>.
</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="GypsyPosition.html" title="GypsyPosition"><span class="type">GypsyPosition</span></a> object
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="gypsy_position_get_position ()">
<a name="gypsy-position-get-position"></a><h3>gypsy_position_get_position ()</h3>
<pre class="programlisting"><a class="link" href="GypsyPosition.html#GypsyPositionFields" title="enum GypsyPositionFields"><span class="returnvalue">GypsyPositionFields</span></a>  gypsy_position_get_position        (<em class="parameter"><code><a class="link" href="GypsyPosition.html" title="GypsyPosition"><span class="type">GypsyPosition</span></a> *position</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> *timestamp</code></em>,
                                                         <em class="parameter"><code><span class="type">double</span> *latitude</code></em>,
                                                         <em class="parameter"><code><span class="type">double</span> *longitude</code></em>,
                                                         <em class="parameter"><code><span class="type">double</span> *altitude</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);</pre>
<p>
Obtains the current position, if known, from the GPS device.
<em class="parameter"><code>timestamp</code></em>, <em class="parameter"><code>latitude</code></em>, <em class="parameter"><code>longitude</code></em> and <em class="parameter"><code>altitude</code></em> can be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><span class="type">NULL</span></a> if the result
is not required.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>position</code></em> :</span></p></td>
<td>A <a class="link" href="GypsyPosition.html" title="GypsyPosition"><span class="type">GypsyPosition</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>timestamp</code></em> :</span></p></td>
<td>Pointer to store the timestamp
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>latitude</code></em> :</span></p></td>
<td>Pointer to store the latitude
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>longitude</code></em> :</span></p></td>
<td>Pointer to store the longitude
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>altitude</code></em> :</span></p></td>
<td>Pointer to store the altitude
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>Pointer to store a <a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> Bitmask of <a class="link" href="GypsyPosition.html#GypsyPositionFields" title="enum GypsyPositionFields"><span class="type">GypsyPositionFields</span></a> indicating what field was set
</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1" title="Property Details">
<a name="GypsyPosition.property-details"></a><h2>Property Details</h2>
<div class="refsect2" title='The "object-path" property'>
<a name="GypsyPosition--object-path"></a><h3>The <code class="literal">"object-path"</code> property</h3>
<pre class="programlisting">  "object-path"              <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a>*                : Write / Construct Only</pre>
<p>
The path of the Gypsy GPS object
</p>
<p>Default value: ""</p>
</div>
</div>
<div class="refsect1" title="Signal Details">
<a name="GypsyPosition.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2" title='The "position-changed" signal'>
<a name="GypsyPosition-position-changed"></a><h3>The <code class="literal">"position-changed"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                user_function                      (<a class="link" href="GypsyPosition.html" title="GypsyPosition"><span class="type">GypsyPosition</span></a> *fields,
                                                        <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a>           timestamp,
                                                        <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a>           latitude,
                                                        <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a>        longitude,
                                                        <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a>        altitude,
                                                        <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a>        arg5,
                                                        <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a>       user_data)      : Run First / No Recursion</pre>
<p>
The ::position-changed signal is emitted when the GPS device
indicates that one or more of the position fields has changed.
The fields which have changed will be indicated in the <em class="parameter"><code>fields</code></em>
bitmask.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>fields</code></em> :</span></p></td>
<td>A bitmask of <a class="link" href="GypsyPosition.html#GypsyPositionFields" title="enum GypsyPositionFields"><span class="type">GypsyPositionFields</span></a> indicating which of the following fields are valid
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>timestamp</code></em> :</span></p></td>
<td>The timestamp when this change occurred
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>latitude</code></em> :</span></p></td>
<td>The new latitude
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>longitude</code></em> :</span></p></td>
<td>The new longitude
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>altitude</code></em> :</span></p></td>
<td>The new altitude
</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>
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