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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
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<title>BtIcDevice: Buzztrax Bt-Ic Reference Manual</title>
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<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle">
<td width="100%" align="left" class="shortcuts">
<a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span>
<a href="#BtIcDevice.description" class="shortcut">Description</a></span><span id="nav_hierarchy"> <span class="dim">|</span>
<a href="#BtIcDevice.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_properties"> <span class="dim">|</span>
<a href="#BtIcDevice.properties" class="shortcut">Properties</a></span>
</td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
<td><a accesskey="u" href="libbtic.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
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</tr></table>
<div class="refentry">
<a name="BtIcDevice"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="BtIcDevice.top_of_page"></a>BtIcDevice</span></h2>
<p>BtIcDevice — buzztraxs interaction controller device</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="BtIcDevice.functions"></a><h2>Functions</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="BtIcDevice.html#btic-device-add-control" title="btic_device_add_control ()">btic_device_add_control</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="BtIcControl.html" title="BtIcControl"><span class="returnvalue">BtIcControl</span></a> *
</td>
<td class="function_name">
<a class="link" href="BtIcDevice.html#btic-device-get-control-by-id" title="btic_device_get_control_by_id ()">btic_device_get_control_by_id</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="BtIcControl.html" title="BtIcControl"><span class="returnvalue">BtIcControl</span></a> *
</td>
<td class="function_name">
<a class="link" href="BtIcDevice.html#btic-device-get-control-by-name" title="btic_device_get_control_by_name ()">btic_device_get_control_by_name</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="BtIcDevice.html#btic-device-has-controls" title="btic_device_has_controls ()">btic_device_has_controls</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="BtIcDevice.html#btic-device-start" title="btic_device_start ()">btic_device_start</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="BtIcDevice.html#btic-device-stop" title="btic_device_stop ()">btic_device_stop</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="BtIcDevice.html#btic-device-virtual-start" title="btic_device_virtual_start ()">*btic_device_virtual_start</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="BtIcDevice.html#btic-device-virtual-stop" title="btic_device_virtual_stop ()">*btic_device_virtual_stop</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="BtIcDevice.properties"></a><h2>Properties</h2>
<div class="informaltable"><table border="0">
<colgroup>
<col width="150px" class="properties_type">
<col width="300px" class="properties_name">
<col width="200px" class="properties_flags">
</colgroup>
<tbody>
<tr>
<td class="property_type"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a></td>
<td class="property_name"><a class="link" href="BtIcDevice.html#BtIcDevice--controls" title="The “controls” property">controls</a></td>
<td class="property_flags">Read</td>
</tr>
<tr>
<td class="property_type">
<a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *</td>
<td class="property_name"><a class="link" href="BtIcDevice.html#BtIcDevice--name" title="The “name” property">name</a></td>
<td class="property_flags">Read / Write / Construct Only</td>
</tr>
<tr>
<td class="property_type">
<a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *</td>
<td class="property_name"><a class="link" href="BtIcDevice.html#BtIcDevice--udi" title="The “udi” property">udi</a></td>
<td class="property_flags">Read / Write / Construct Only</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="BtIcDevice.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody><tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="BtIcDevice.html#BtIcDevice-struct" title="struct BtIcDevice">BtIcDevice</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="BtIcDevice.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen"> <a href="/usr/share/gtk-doc/html/gobjectgobject-The-Base-Object-Type.html#GObject-struct">GObject</a>
<span class="lineart">╰──</span> BtIcDevice
<span class="lineart">├──</span> <a class="link" href="BtIcASeqDevice.html" title="BtIcASeqDevice">BtIcASeqDevice</a>
<span class="lineart">├──</span> <a class="link" href="BtIcInputDevice.html" title="BtIcInputDevice">BtIcInputDevice</a>
<span class="lineart">╰──</span> <a class="link" href="BtIcMidiDevice.html" title="BtIcMidiDevice">BtIcMidiDevice</a>
</pre>
</div>
<div class="refsect1">
<a name="BtIcDevice.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include <libbtic/ic.h>
</pre>
</div>
<div class="refsect1">
<a name="BtIcDevice.description"></a><h2>Description</h2>
<p>Abstract base class for control devices. Subclasses will provide
functionality to query capabilities and register <a class="link" href="BtIcControl.html" title="BtIcControl"><span class="type">BtIcControl</span></a> instances.
They will also read from the device and trigger the change events on their
controls (via value property). To activate reading from a device, the
application needs to call <a class="link" href="BtIcDevice.html#btic-device-start" title="btic_device_start ()"><code class="function">btic_device_start()</code></a>. The device is activates on the
first such call. Each activation is counted and thus should be paired with a
call to <a class="link" href="BtIcDevice.html#btic-device-stop" title="btic_device_stop ()"><code class="function">btic_device_stop()</code></a> to stop the device on the last call.</p>
<p>This baseclass manages the added controls. They can be queried by calling
<a class="link" href="BtIcDevice.html#btic-device-get-control-by-id" title="btic_device_get_control_by_id ()"><code class="function">btic_device_get_control_by_id()</code></a> or iterating the list in
BtIcDevice::controls.</p>
</div>
<div class="refsect1">
<a name="BtIcDevice.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="btic-device-add-control"></a><h3>btic_device_add_control ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
btic_device_add_control (<em class="parameter"><code>const <a class="link" href="BtIcDevice.html" title="BtIcDevice"><span class="type">BtIcDevice</span></a> *self</code></em>,
<em class="parameter"><code>const <a class="link" href="BtIcControl.html" title="BtIcControl"><span class="type">BtIcControl</span></a> *control</code></em>);</pre>
<p>Add the given <em class="parameter"><code>control</code></em>
to the list that the device manages. Takes ownership
of the control.</p>
<div class="refsect3">
<a name="id-1.4.7.9.2.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>self</p></td>
<td class="parameter_description"><p>the device</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>control</p></td>
<td class="parameter_description"><p>new control</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="btic-device-get-control-by-id"></a><h3>btic_device_get_control_by_id ()</h3>
<pre class="programlisting"><a class="link" href="BtIcControl.html" title="BtIcControl"><span class="returnvalue">BtIcControl</span></a> *
btic_device_get_control_by_id (<em class="parameter"><code>const <a class="link" href="BtIcDevice.html" title="BtIcDevice"><span class="type">BtIcDevice</span></a> *self</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="type">guint</span></a> id</code></em>);</pre>
<p>Look up a control by <em class="parameter"><code>id</code></em>
.</p>
<div class="refsect3">
<a name="id-1.4.7.9.3.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>self</p></td>
<td class="parameter_description"><p>the device</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>id</p></td>
<td class="parameter_description"><p>the control id</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.4.7.9.3.6"></a><h4>Returns</h4>
<p> the found instance or <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. This does not increase
the ref-count!. </p>
<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-0-6.html#api-index-0.6">0.6</a></p>
</div>
<hr>
<div class="refsect2">
<a name="btic-device-get-control-by-name"></a><h3>btic_device_get_control_by_name ()</h3>
<pre class="programlisting"><a class="link" href="BtIcControl.html" title="BtIcControl"><span class="returnvalue">BtIcControl</span></a> *
btic_device_get_control_by_name (<em class="parameter"><code>const <a class="link" href="BtIcDevice.html" title="BtIcDevice"><span class="type">BtIcDevice</span></a> *self</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>);</pre>
<p>Look up a control by <em class="parameter"><code>name</code></em>
.</p>
<div class="refsect3">
<a name="id-1.4.7.9.4.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>self</p></td>
<td class="parameter_description"><p>the device</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>name</p></td>
<td class="parameter_description"><p>the control name</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.4.7.9.4.6"></a><h4>Returns</h4>
<p> the found instance or <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-0-9.html#api-index-0.9">0.9</a></p>
</div>
<hr>
<div class="refsect2">
<a name="btic-device-has-controls"></a><h3>btic_device_has_controls ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
btic_device_has_controls (<em class="parameter"><code>const <a class="link" href="BtIcDevice.html" title="BtIcDevice"><span class="type">BtIcDevice</span></a> *self</code></em>);</pre>
<p>Check if the device has controls. This is useful to check after device
creation. One reason for not having any controls could also be missing
read-permissions on the device node.</p>
<div class="refsect3">
<a name="id-1.4.7.9.5.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>self</p></td>
<td class="parameter_description"><p>the device</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-0-6.html#api-index-0.6">0.6</a></p>
</div>
<hr>
<div class="refsect2">
<a name="btic-device-start"></a><h3>btic_device_start ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
btic_device_start (<em class="parameter"><code>const <a class="link" href="BtIcDevice.html" title="BtIcDevice"><span class="type">BtIcDevice</span></a> *self</code></em>);</pre>
<p>Starts the io-loop for the device. This can be called multiple times and must
be paired by an equal amount of <a class="link" href="BtIcDevice.html#btic-device-stop" title="btic_device_stop ()"><code class="function">btic_device_stop()</code></a> calls.</p>
<div class="refsect3">
<a name="id-1.4.7.9.6.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>self</p></td>
<td class="parameter_description"><p>the <a class="link" href="BtIcDevice.html" title="BtIcDevice"><span class="type">BtIcDevice</span></a> instance to use</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.4.7.9.6.6"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> for success</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="btic-device-stop"></a><h3>btic_device_stop ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
btic_device_stop (<em class="parameter"><code>const <a class="link" href="BtIcDevice.html" title="BtIcDevice"><span class="type">BtIcDevice</span></a> *self</code></em>);</pre>
<p>Stops the io-loop for the device. This must be called as often as the device
has been started using <a class="link" href="BtIcDevice.html#btic-device-start" title="btic_device_start ()"><code class="function">btic_device_start()</code></a>.</p>
<div class="refsect3">
<a name="id-1.4.7.9.7.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>self</p></td>
<td class="parameter_description"><p>the <a class="link" href="BtIcDevice.html" title="BtIcDevice"><span class="type">BtIcDevice</span></a> instance to use</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.4.7.9.7.6"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> for success</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="btic-device-virtual-start"></a><h3>btic_device_virtual_start ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
<span class="c_punctuation">(</span>*btic_device_virtual_start<span class="c_punctuation">)</span> (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gconstpointer"><span class="type">gconstpointer</span></a> self</code></em>);</pre>
<p>Subclasses will override this methods with a function that counts start calls
and runs the device-io for starts>0.</p>
<div class="refsect3">
<a name="id-1.4.7.9.8.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>self</p></td>
<td class="parameter_description"><p>device instance</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.4.7.9.8.6"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> for success</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="btic-device-virtual-stop"></a><h3>btic_device_virtual_stop ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
<span class="c_punctuation">(</span>*btic_device_virtual_stop<span class="c_punctuation">)</span> (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gconstpointer"><span class="type">gconstpointer</span></a> self</code></em>);</pre>
<p>Subclasses will override this methods with a function that counts stop calls
and stops the device-io for starts==0.</p>
<div class="refsect3">
<a name="id-1.4.7.9.9.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>self</p></td>
<td class="parameter_description"><p>device instance</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.4.7.9.9.6"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> for success</p>
</div>
</div>
</div>
<div class="refsect1">
<a name="BtIcDevice.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="BtIcDevice-struct"></a><h3>struct BtIcDevice</h3>
<pre class="programlisting">struct BtIcDevice;</pre>
<p>buzztraxs interaction controller device</p>
</div>
</div>
<div class="refsect1">
<a name="BtIcDevice.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="BtIcDevice--controls"></a><h3>The <code class="literal">“controls”</code> property</h3>
<pre class="programlisting"> “controls” <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a></pre>
<p>A copy of the list of device controls.</p>
<p>Flags: Read</p>
</div>
<hr>
<div class="refsect2">
<a name="BtIcDevice--name"></a><h3>The <code class="literal">“name”</code> property</h3>
<pre class="programlisting"> “name” <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *</pre>
<p>device name.</p>
<p>Flags: Read / Write / Construct Only</p>
<p>Default value: NULL</p>
</div>
<hr>
<div class="refsect2">
<a name="BtIcDevice--udi"></a><h3>The <code class="literal">“udi”</code> property</h3>
<pre class="programlisting"> “udi” <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *</pre>
<p>device udi.</p>
<p>Flags: Read / Write / Construct Only</p>
<p>Default value: NULL</p>
</div>
</div>
</div>
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