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<div id="projectname">GEIS
 <span id="projectnumber">2.0</span>
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<div id="projectbrief">Gesture Engine Interface Support</div>
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<div class="title">Input Devices</div> </div>
<div class="ingroups"><a class="el" href="group__geis__v1.html">The Simplified GEIS Interface</a></div></div><!--header-->
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Data Structures</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="struct_geis_input_funcs.html">GeisInputFuncs</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">Callback functions used to handle changes in the available input devices. <a href="struct_geis_input_funcs.html#details">More...</a><br/></td></tr>
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Macros</h2></td></tr>
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#define </td><td class="memItemRight" valign="bottom"><b>GEIS_ALL_INPUT_DEVICES</b></td></tr>
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Typedefs</h2></td></tr>
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typedef unsigned int </td><td class="memItemRight" valign="bottom"><b>GeisInputDeviceId</b></td></tr>
<tr class="memitem:ga60635065ce0e1af35ff298e10d8aa7e0"><td class="memItemLeft" align="right" valign="top">typedef void(* </td><td class="memItemRight" valign="bottom"><a class="el" href="group__geis__v1__input.html#ga60635065ce0e1af35ff298e10d8aa7e0">GeisInputCallback</a> )(void *cookie, GeisInputDeviceId device_id, void *attrs)</td></tr>
<tr class="memdesc:ga60635065ce0e1af35ff298e10d8aa7e0"><td class="mdescLeft"> </td><td class="mdescRight">Prototype for input device callback functions. <a href="#ga60635065ce0e1af35ff298e10d8aa7e0"></a><br/></td></tr>
<tr class="memitem:ga9bc2c727d6eda87a1c19d93cee1a72f5"><td class="memItemLeft" align="right" valign="top">typedef struct <a class="el" href="struct_geis_input_funcs.html">GeisInputFuncs</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__geis__v1__input.html#ga9bc2c727d6eda87a1c19d93cee1a72f5">GeisInputFuncs</a></td></tr>
<tr class="memdesc:ga9bc2c727d6eda87a1c19d93cee1a72f5"><td class="mdescLeft"> </td><td class="mdescRight">Callback functions used to handle changes in the available input devices. <a href="#ga9bc2c727d6eda87a1c19d93cee1a72f5"></a><br/></td></tr>
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Functions</h2></td></tr>
<tr class="memitem:gae60ac69abf1c59fa45ab9713440cff78"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__geis__common.html#ga7fe40cb68bb7a98f5429284514872790">GeisStatus</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__geis__v1__input.html#gae60ac69abf1c59fa45ab9713440cff78">geis_input_devices</a> (<a class="el" href="class_geis_instance.html">GeisInstance</a> geis_instance, <a class="el" href="struct_geis_input_funcs.html">GeisInputFuncs</a> *func, void *cookie)</td></tr>
<tr class="memdesc:gae60ac69abf1c59fa45ab9713440cff78"><td class="mdescLeft"> </td><td class="mdescRight">Registers a callback to receive information on input devices. <a href="#gae60ac69abf1c59fa45ab9713440cff78"></a><br/></td></tr>
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<a name="details" id="details"></a><h2>Detailed Description</h2>
<h2>Typedef Documentation</h2>
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<td class="memname">typedef void(* GeisInputCallback)(void *cookie, GeisInputDeviceId device_id, void *attrs)</td>
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<p>Prototype for input device callback functions. </p>
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<td class="memname">typedef struct <a class="el" href="struct_geis_input_funcs.html">GeisInputFuncs</a> <a class="el" href="struct_geis_input_funcs.html">GeisInputFuncs</a></td>
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<p>Callback functions used to handle changes in the available input devices. </p>
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<h2>Function Documentation</h2>
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<td class="memname"><a class="el" href="group__geis__common.html#ga7fe40cb68bb7a98f5429284514872790">GeisStatus</a> geis_input_devices </td>
<td>(</td>
<td class="paramtype"><a class="el" href="class_geis_instance.html">GeisInstance</a> </td>
<td class="paramname"><em>geis_instance</em>, </td>
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<td class="paramtype"><a class="el" href="struct_geis_input_funcs.html">GeisInputFuncs</a> * </td>
<td class="paramname"><em>func</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">void * </td>
<td class="paramname"><em>cookie</em> </td>
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<td>)</td>
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<p>Registers a callback to receive information on input devices. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">geis_instance</td><td>points to a geis gesture subscription instance </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">func</td><td>points to a <a class="el" href="struct_geis_input_funcs.html" title="Callback functions used to handle changes in the available input devices.">GeisInputFuncs</a> table </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">cookie</td><td>an application specific value to be passed to the callback</td></tr>
</table>
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</dl>
<p>The callback is called for each gesture-capable input device available for the display region associated with the geis subscription instance. Over time, as gesture-capable input devices appear and disappear or change their abilities or configuration, the callback may be called again.</p>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">GEIS_BAD_ARGUMENT</td><td>an invalid argument value was passed </td></tr>
<tr><td class="paramname">GEIS_STATUS_SUCCESS</td><td>normal successful completion </td></tr>
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