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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<a href="#GypsyAccuracy.synopsis" class="shortcut">Top</a>
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<a href="#GypsyAccuracy.description" class="shortcut">Description</a>
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<a href="#GypsyAccuracy.object-hierarchy" class="shortcut">Object Hierarchy</a>
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<a href="#GypsyAccuracy.properties" class="shortcut">Properties</a>
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<a href="#GypsyAccuracy.signals" class="shortcut">Signals</a>
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<div class="refentry" title="GypsyAccuracy">
<a name="GypsyAccuracy"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="GypsyAccuracy.top_of_page"></a>GypsyAccuracy</span></h2>
<p>GypsyAccuracy — Object for obtaining accuracy information from gypsy-daemon</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv" title="Synopsis">
<a name="GypsyAccuracy.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
<a class="link" href="GypsyAccuracy.html#GypsyAccuracy-struct" title="GypsyAccuracy">GypsyAccuracy</a>;
#define <a class="link" href="GypsyAccuracy.html#GYPSY-ACCURACY-DBUS-SERVICE--CAPS" title="GYPSY_ACCURACY_DBUS_SERVICE">GYPSY_ACCURACY_DBUS_SERVICE</a>
#define <a class="link" href="GypsyAccuracy.html#GYPSY-ACCURACY-DBUS-INTERFACE--CAPS" title="GYPSY_ACCURACY_DBUS_INTERFACE">GYPSY_ACCURACY_DBUS_INTERFACE</a>
enum <a class="link" href="GypsyAccuracy.html#GypsyAccuracyFields" title="enum GypsyAccuracyFields">GypsyAccuracyFields</a>;
<a class="link" href="GypsyAccuracy.html" title="GypsyAccuracy">GypsyAccuracy</a> * <a class="link" href="GypsyAccuracy.html#gypsy-accuracy-new" title="gypsy_accuracy_new ()">gypsy_accuracy_new</a> (const char *object_path);
<a class="link" href="GypsyAccuracy.html#GypsyAccuracyFields" title="enum GypsyAccuracyFields">GypsyAccuracyFields</a> <a class="link" href="GypsyAccuracy.html#gypsy-accuracy-get-accuracy" title="gypsy_accuracy_get_accuracy ()">gypsy_accuracy_get_accuracy</a> (<a class="link" href="GypsyAccuracy.html" title="GypsyAccuracy">GypsyAccuracy</a> *accuracy,
double *pdop,
double *hdop,
double *vdop,
<a
href="http://library.gnome.org/devel/glib/unstable/glib-Error-Reporting.html#GError"
>GError</a> **error);
</pre>
</div>
<div class="refsect1" title="Object Hierarchy">
<a name="GypsyAccuracy.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>
+----GypsyAccuracy
</pre>
</div>
<div class="refsect1" title="Properties">
<a name="GypsyAccuracy.properties"></a><h2>Properties</h2>
<pre class="synopsis">
"<a class="link" href="GypsyAccuracy.html#GypsyAccuracy--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="GypsyAccuracy.signals"></a><h2>Signals</h2>
<pre class="synopsis">
"<a class="link" href="GypsyAccuracy.html#GypsyAccuracy-accuracy-changed" title='The "accuracy-changed" signal'>accuracy-changed</a>" : Run First / No Recursion
</pre>
</div>
<div class="refsect1" title="Description">
<a name="GypsyAccuracy.description"></a><h2>Description</h2>
<p>
<a class="link" href="GypsyAccuracy.html" title="GypsyAccuracy"><span class="type">GypsyAccuracy</span></a> is used whenever the client program wishes to know about GPS
accuracy changes. It can report the current accuracy, and has a signal to
notify listeners to changes. The accuracy consists of positional accuracy,
horizontal accuracy (on the latitude/longitude plane) and vertical
(altitudinal) accuracy.
</p>
<p>
A <a class="link" href="GypsyAccuracy.html" title="GypsyAccuracy"><span class="type">GypsyAccuracy</span></a> object is created using <a class="link" href="GypsyAccuracy.html#gypsy-accuracy-new" title="gypsy_accuracy_new ()"><code class="function">gypsy_accuracy_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
course with <a class="link" href="GypsyAccuracy.html#gypsy-accuracy-get-accuracy" title="gypsy_accuracy_get_accuracy ()"><code class="function">gypsy_accuracy_get_accuracy()</code></a>.
</p>
<p>
As the accuracy information changes <a class="link" href="GypsyAccuracy.html" title="GypsyAccuracy"><span class="type">GypsyAccuracy</span></a> will emit the
accuracy-changed signal. This signal contains the accuracy information if
gypsy-daemon knows it. It has a fields paramater which is a bitmask of
<a class="link" href="GypsyAccuracy.html#GypsyAccuracyFields" title="enum GypsyAccuracyFields"><span class="type">GypsyAccuracyFields</span></a> which indicates which of the position, horizontal or
vertical contains valid information.
</p>
<p>
</p>
<div class="informalexample"><pre class="programlisting">
GypsyAccuracy *accuracy;
GError *error = NULL;
. . .
/ * path comes from the gypsy_control_create() function * /
accuracy = gypsy_accuracy_new (path);
g_signal_connect (accuracy, "accuracy-changed", G_CALLBACK (accuracy_changed), NULL);
. . .
static void
accuracy_changed (GypsyAccuracy *accuracy,
GypsyAccuracyFields fields,
double position,
double horizontal,
double vertical,
gpointer userdata)
{
g_print ("horizontal: %f\n", (fields & GYPSY_ACCURACY_FIELDS_HORIZONTAL) ? horizontal : -1.0);
}
</pre></div>
<p>
</p>
</div>
<div class="refsect1" title="Details">
<a name="GypsyAccuracy.details"></a><h2>Details</h2>
<div class="refsect2" title="GypsyAccuracy">
<a name="GypsyAccuracy-struct"></a><h3>GypsyAccuracy</h3>
<pre class="programlisting">typedef struct _GypsyAccuracy GypsyAccuracy;</pre>
<p>
There are no public fields in <a class="link" href="GypsyAccuracy.html" title="GypsyAccuracy"><span class="type">GypsyAccuracy</span></a>.</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" title="GYPSY_ACCURACY_DBUS_SERVICE">
<a name="GYPSY-ACCURACY-DBUS-SERVICE--CAPS"></a><h3>GYPSY_ACCURACY_DBUS_SERVICE</h3>
<pre class="programlisting">#define GYPSY_ACCURACY_DBUS_SERVICE "org.freedesktop.Gypsy"
</pre>
<p>
A define containing the address of the Accuracy service</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" title="GYPSY_ACCURACY_DBUS_INTERFACE">
<a name="GYPSY-ACCURACY-DBUS-INTERFACE--CAPS"></a><h3>GYPSY_ACCURACY_DBUS_INTERFACE</h3>
<pre class="programlisting">#define GYPSY_ACCURACY_DBUS_INTERFACE "org.freedesktop.Gypsy.Accuracy"
</pre>
<p>
A define containing the name of the Accuracy interface</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" title="enum GypsyAccuracyFields">
<a name="GypsyAccuracyFields"></a><h3>enum GypsyAccuracyFields</h3>
<pre class="programlisting">typedef enum {
GYPSY_ACCURACY_FIELDS_NONE = 0,
GYPSY_ACCURACY_FIELDS_POSITION = 1 << 0,
GYPSY_ACCURACY_FIELDS_HORIZONTAL = 1 << 1,
GYPSY_ACCURACY_FIELDS_VERTICAL = 1 << 2,
} GypsyAccuracyFields;
</pre>
<p>
A bitmask telling which fields in the accuracy_changed callback are valid</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="GYPSY-ACCURACY-FIELDS-NONE--CAPS"></a><span class="term"><code class="literal">GYPSY_ACCURACY_FIELDS_NONE</code></span></p></td>
<td> None of the fields are valid
</td>
</tr>
<tr>
<td><p><a name="GYPSY-ACCURACY-FIELDS-POSITION--CAPS"></a><span class="term"><code class="literal">GYPSY_ACCURACY_FIELDS_POSITION</code></span></p></td>
<td> The Position (3D) DOP field is valid
</td>
</tr>
<tr>
<td><p><a name="GYPSY-ACCURACY-FIELDS-HORIZONTAL--CAPS"></a><span class="term"><code class="literal">GYPSY_ACCURACY_FIELDS_HORIZONTAL</code></span></p></td>
<td> The Horizonal (2D) DOP field is valid
</td>
</tr>
<tr>
<td><p><a name="GYPSY-ACCURACY-FIELDS-VERTICAL--CAPS"></a><span class="term"><code class="literal">GYPSY_ACCURACY_FIELDS_VERTICAL</code></span></p></td>
<td> The Vertical (altitude) DOP field is valid
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="gypsy_accuracy_new ()">
<a name="gypsy-accuracy-new"></a><h3>gypsy_accuracy_new ()</h3>
<pre class="programlisting"><a class="link" href="GypsyAccuracy.html" title="GypsyAccuracy">GypsyAccuracy</a> * gypsy_accuracy_new (const char *object_path);</pre>
<p>
Creates a new <a class="link" href="GypsyAccuracy.html" title="GypsyAccuracy"><span class="type">GypsyAccuracy</span></a> object that listens for accuracy 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="GypsyAccuracy.html" title="GypsyAccuracy"><span class="type">GypsyAccuracy</span></a> object
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="gypsy_accuracy_get_accuracy ()">
<a name="gypsy-accuracy-get-accuracy"></a><h3>gypsy_accuracy_get_accuracy ()</h3>
<pre class="programlisting"><a class="link" href="GypsyAccuracy.html#GypsyAccuracyFields" title="enum GypsyAccuracyFields">GypsyAccuracyFields</a> gypsy_accuracy_get_accuracy (<a class="link" href="GypsyAccuracy.html" title="GypsyAccuracy">GypsyAccuracy</a> *accuracy,
double *pdop,
double *hdop,
double *vdop,
<a
href="http://library.gnome.org/devel/glib/unstable/glib-Error-Reporting.html#GError"
>GError</a> **error);</pre>
<p>
Obtains the current accuracy, if known, from the GPS device. <em class="parameter"><code>pdop</code></em>, <em class="parameter"><code>hdop</code></em>
and <em class="parameter"><code>vdop</code></em> can be <a
href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL--CAPS"
><span class="type">NULL</span></a> if the result is not required.</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>accuracy</code></em> :</span></p></td>
<td> A <a class="link" href="GypsyAccuracy.html" title="GypsyAccuracy"><span class="type">GypsyAccuracy</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>pdop</code></em> :</span></p></td>
<td> Pointer to store the position DOP
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>hdop</code></em> :</span></p></td>
<td> Pointer to store the horizonal DOP
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>vdop</code></em> :</span></p></td>
<td> Pointer to store the vertical DOP
</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="http://library.gnome.org/devel/glib/unstable/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="GypsyAccuracy.html#GypsyAccuracyFields" title="enum GypsyAccuracyFields"><span class="type">GypsyAccuracyFields</span></a> indicating what fields were set
</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1" title="Property Details">
<a name="GypsyAccuracy.property-details"></a><h2>Property Details</h2>
<div class="refsect2" title='The "object-path" property'>
<a name="GypsyAccuracy--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 path of the Gypsy GPS object</p>
<p>
</p>
<p>Default value: ""</p>
</div>
</div>
<div class="refsect1" title="Signal Details">
<a name="GypsyAccuracy.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2" title='The "accuracy-changed" signal'>
<a name="GypsyAccuracy-accuracy-changed"></a><h3>The <code class="literal">"accuracy-changed"</code> signal</h3>
<pre class="programlisting">void user_function (<a class="link" href="GypsyAccuracy.html" title="GypsyAccuracy">GypsyAccuracy</a> *fields,
<a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"
>gint</a> pdop,
<a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gdouble"
>gdouble</a> hdop,
<a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gdouble"
>gdouble</a> vdop,
<a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gdouble"
>gdouble</a> arg4,
<a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"
>gpointer</a> user_data) : Run First / No Recursion</pre>
<p>
The ::accuracy-changed signal is emitted when the GPS device
indicates that one or more of the accuracy fields has changed.
The fields which have changed will be indicated in the <em class="parameter"><code>fields</code></em>
bitmask.</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>fields</code></em> :</span></p></td>
<td> A bitmask of <a class="link" href="GypsyAccuracy.html#GypsyAccuracyFields" title="enum GypsyAccuracyFields"><span class="type">GypsyAccuracyFields</span></a> indicating which of the following fields are valid
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>pdop</code></em> :</span></p></td>
<td> The new position DOP
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>hdop</code></em> :</span></p></td>
<td> The new horizonal DOP
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>vdop</code></em> :</span></p></td>
<td> The new vertical DOP
</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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