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<h2><span class="refentrytitle"><a name="at-spi-cspi-Registry-queries.top_of_page"></a>Registry queries</span></h2>
<p>Registry queries</p>
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<a name="at-spi-cspi-Registry-queries.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">enum                <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeySynthType" title="enum AccessibleKeySynthType">AccessibleKeySynthType</a>;
<span class="returnvalue">int</span>                 <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-getDesktopCount" title="SPI_getDesktopCount ()">SPI_getDesktopCount</a>                 (<em class="parameter"><code><span class="type">void</span></code></em>);
<a class="link" href="at-spi-cspi-Accessible-Objects.html#Accessible" title="struct Accessible"><span class="returnvalue">Accessible</span></a> *        <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-getDesktop" title="SPI_getDesktop ()">SPI_getDesktop</a>                      (<em class="parameter"><code><span class="type">int</span> i</code></em>);
<span class="returnvalue">int</span>                 <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-getDesktopList" title="SPI_getDesktopList ()">SPI_getDesktopList</a>                  (<em class="parameter"><code><a class="link" href="at-spi-cspi-Accessible-Objects.html#Accessible" title="struct Accessible"><span class="type">Accessible</span></a> ***desktop_list</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-freeDesktopList" title="SPI_freeDesktopList ()">SPI_freeDesktopList</a>                 (<em class="parameter"><code><a class="link" href="at-spi-cspi-Accessible-Objects.html#Accessible" title="struct Accessible"><span class="type">Accessible</span></a> **desktop_list</code></em>);

<span class="returnvalue">SPIBoolean</span>          (<a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeystrokeListenerCB" title="AccessibleKeystrokeListenerCB ()">*AccessibleKeystrokeListenerCB</a>)    (<em class="parameter"><code>const <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeystroke" title="AccessibleKeystroke"><span class="type">AccessibleKeystroke</span></a> *stroke</code></em>,
                                                         <em class="parameter"><code><span class="type">void</span> *user_data</code></em>);
typedef             <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeyEventMask" title="AccessibleKeyEventMask">AccessibleKeyEventMask</a>;
typedef             <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleModifierMaskType" title="AccessibleModifierMaskType">AccessibleModifierMaskType</a>;
typedef             <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeyMaskType" title="AccessibleKeyMaskType">AccessibleKeyMaskType</a>;
typedef             <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeyEventType" title="AccessibleKeyEventType">AccessibleKeyEventType</a>;
enum                <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeyListenerSyncType" title="enum AccessibleKeyListenerSyncType">AccessibleKeyListenerSyncType</a>;
typedef             <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeystroke" title="AccessibleKeystroke">AccessibleKeystroke</a>;
<span class="returnvalue">AccessibleKeySet</span> *  <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-createAccessibleKeySet" title="SPI_createAccessibleKeySet ()">SPI_createAccessibleKeySet</a>          (<em class="parameter"><code><span class="type">int</span> len</code></em>,
                                                         <em class="parameter"><code>const <span class="type">char</span> *keysyms</code></em>,
                                                         <em class="parameter"><code><span class="type">short</span> *keycodes</code></em>,
                                                         <em class="parameter"><code>const <span class="type">char</span> **keystrings</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-freeAccessibleKeySet" title="SPI_freeAccessibleKeySet ()">SPI_freeAccessibleKeySet</a>            (<em class="parameter"><code><span class="type">AccessibleKeySet</span> *keyset</code></em>);
<span class="returnvalue">AccessibleKeystrokeListener</span> * <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-createAccessibleKeystrokeListener" title="SPI_createAccessibleKeystrokeListener ()">SPI_createAccessibleKeystrokeListener</a>
                                                        (<em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeystrokeListenerCB" title="AccessibleKeystrokeListenerCB ()"><span class="type">AccessibleKeystrokeListenerCB</span></a> callback</code></em>,
                                                         <em class="parameter"><code><span class="type">void</span> *user_data</code></em>);
<span class="returnvalue">SPIBoolean</span>          <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-registerGlobalEventListener" title="SPI_registerGlobalEventListener ()">SPI_registerGlobalEventListener</a>     (<em class="parameter"><code><span class="type">AccessibleEventListener</span> *listener</code></em>,
                                                         <em class="parameter"><code>const <span class="type">char</span> *eventType</code></em>);
<span class="returnvalue">SPIBoolean</span>          <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-deregisterGlobalEventListener" title="SPI_deregisterGlobalEventListener ()">SPI_deregisterGlobalEventListener</a>   (<em class="parameter"><code><span class="type">AccessibleEventListener</span> *listener</code></em>,
                                                         <em class="parameter"><code>const <span class="type">char</span> *eventType</code></em>);
<span class="returnvalue">SPIBoolean</span>          <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-deregisterGlobalEventListenerAll" title="SPI_deregisterGlobalEventListenerAll ()">SPI_deregisterGlobalEventListenerAll</a>
                                                        (<em class="parameter"><code><span class="type">AccessibleEventListener</span> *listener</code></em>);
<span class="returnvalue">SPIBoolean</span>          <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-registerAccessibleKeystrokeListener" title="SPI_registerAccessibleKeystrokeListener ()">SPI_registerAccessibleKeystrokeListener</a>
                                                        (<em class="parameter"><code><span class="type">AccessibleKeystrokeListener</span> *listener</code></em>,
                                                         <em class="parameter"><code><span class="type">AccessibleKeySet</span> *keys</code></em>,
                                                         <em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeyMaskType" title="AccessibleKeyMaskType"><span class="type">AccessibleKeyMaskType</span></a> modmask</code></em>,
                                                         <em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeyEventMask" title="AccessibleKeyEventMask"><span class="type">AccessibleKeyEventMask</span></a> eventmask</code></em>,
                                                         <em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeyListenerSyncType" title="enum AccessibleKeyListenerSyncType"><span class="type">AccessibleKeyListenerSyncType</span></a> sync_type</code></em>);
<span class="returnvalue">SPIBoolean</span>          <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-deregisterAccessibleKeystrokeListener" title="SPI_deregisterAccessibleKeystrokeListener ()">SPI_deregisterAccessibleKeystrokeListener</a>
                                                        (<em class="parameter"><code><span class="type">AccessibleKeystrokeListener</span> *listener</code></em>,
                                                         <em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeyMaskType" title="AccessibleKeyMaskType"><span class="type">AccessibleKeyMaskType</span></a> modmask</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeystrokeListener-unref" title="AccessibleKeystrokeListener_unref ()">AccessibleKeystrokeListener_unref</a>   (<em class="parameter"><code><span class="type">AccessibleKeystrokeListener</span> *listener</code></em>);
<span class="returnvalue">SPIBoolean</span>          <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeystrokeListener-removeCallback" title="AccessibleKeystrokeListener_removeCallback ()">AccessibleKeystrokeListener_removeCallback</a>
                                                        (<em class="parameter"><code><span class="type">AccessibleKeystrokeListener</span> *listener</code></em>,
                                                         <em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeystrokeListenerCB" title="AccessibleKeystrokeListenerCB ()"><span class="type">AccessibleKeystrokeListenerCB</span></a> callback</code></em>);
<span class="returnvalue">SPIBoolean</span>          <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeystrokeListener-addCallback" title="AccessibleKeystrokeListener_addCallback ()">AccessibleKeystrokeListener_addCallback</a>
                                                        (<em class="parameter"><code><span class="type">AccessibleKeystrokeListener</span> *listener</code></em>,
                                                         <em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeystrokeListenerCB" title="AccessibleKeystrokeListenerCB ()"><span class="type">AccessibleKeystrokeListenerCB</span></a> callback</code></em>,
                                                         <em class="parameter"><code><span class="type">void</span> *user_data</code></em>);
<span class="returnvalue">SPIBoolean</span>          <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-generateKeyboardEvent" title="SPI_generateKeyboardEvent ()">SPI_generateKeyboardEvent</a>           (<em class="parameter"><code>long <span class="type">int</span> keyval</code></em>,
                                                         <em class="parameter"><code><span class="type">char</span> *keystring</code></em>,
                                                         <em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeySynthType" title="enum AccessibleKeySynthType"><span class="type">AccessibleKeySynthType</span></a> synth_type</code></em>);
<span class="returnvalue">SPIBoolean</span>          <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-generateMouseEvent" title="SPI_generateMouseEvent ()">SPI_generateMouseEvent</a>              (<em class="parameter"><code>long <span class="type">int</span> x</code></em>,
                                                         <em class="parameter"><code>long <span class="type">int</span> y</code></em>,
                                                         <em class="parameter"><code><span class="type">char</span> *name</code></em>);
                    <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceEvent" title="AccessibleDeviceEvent">AccessibleDeviceEvent</a>;
typedef             <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceEventMask" title="AccessibleDeviceEventMask">AccessibleDeviceEventMask</a>;
enum                <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceEventType" title="enum AccessibleDeviceEventType">AccessibleDeviceEventType</a>;
<span class="returnvalue">SPIBoolean</span>          (<a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceListenerCB" title="AccessibleDeviceListenerCB ()">*AccessibleDeviceListenerCB</a>)       (<em class="parameter"><code>const <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceEvent" title="AccessibleDeviceEvent"><span class="type">AccessibleDeviceEvent</span></a> *stroke</code></em>,
                                                         <em class="parameter"><code><span class="type">void</span> *user_data</code></em>);
<span class="returnvalue">AccessibleDeviceListener</span> * <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-createAccessibleDeviceListener" title="SPI_createAccessibleDeviceListener ()">SPI_createAccessibleDeviceListener</a>
                                                        (<em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceListenerCB" title="AccessibleDeviceListenerCB ()"><span class="type">AccessibleDeviceListenerCB</span></a> callback</code></em>,
                                                         <em class="parameter"><code><span class="type">void</span> *user_data</code></em>);
<span class="returnvalue">SPIBoolean</span>          <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-registerDeviceEventListener" title="SPI_registerDeviceEventListener ()">SPI_registerDeviceEventListener</a>     (<em class="parameter"><code><span class="type">AccessibleDeviceListener</span> *listener</code></em>,
                                                         <em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceEventMask" title="AccessibleDeviceEventMask"><span class="type">AccessibleDeviceEventMask</span></a> eventmask</code></em>,
                                                         <em class="parameter"><code><span class="type">void</span> *filter</code></em>);
<span class="returnvalue">SPIBoolean</span>          <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-deregisterDeviceEventListener" title="SPI_deregisterDeviceEventListener ()">SPI_deregisterDeviceEventListener</a>   (<em class="parameter"><code><span class="type">AccessibleDeviceListener</span> *listener</code></em>,
                                                         <em class="parameter"><code><span class="type">void</span> *filter</code></em>);
<span class="returnvalue">SPIBoolean</span>          <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceListener-addCallback" title="AccessibleDeviceListener_addCallback ()">AccessibleDeviceListener_addCallback</a>
                                                        (<em class="parameter"><code><span class="type">AccessibleDeviceListener</span> *listener</code></em>,
                                                         <em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceListenerCB" title="AccessibleDeviceListenerCB ()"><span class="type">AccessibleDeviceListenerCB</span></a> callback</code></em>,
                                                         <em class="parameter"><code><span class="type">void</span> *user_data</code></em>);
<span class="returnvalue">SPIBoolean</span>          <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceListener-removeCallback" title="AccessibleDeviceListener_removeCallback ()">AccessibleDeviceListener_removeCallback</a>
                                                        (<em class="parameter"><code><span class="type">AccessibleDeviceListener</span> *listener</code></em>,
                                                         <em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceListenerCB" title="AccessibleDeviceListenerCB ()"><span class="type">AccessibleDeviceListenerCB</span></a> callback</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceListener-unref" title="AccessibleDeviceListener_unref ()">AccessibleDeviceListener_unref</a>      (<em class="parameter"><code><span class="type">AccessibleDeviceListener</span> *listener</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="at-spi-cspi-Registry-queries.description"></a><h2>Description</h2>
<p>
</p>
</div>
<div class="refsect1">
<a name="at-spi-cspi-Registry-queries.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="AccessibleKeySynthType"></a><h3>enum AccessibleKeySynthType</h3>
<pre class="programlisting">typedef enum {
  SPI_KEY_PRESS,
  SPI_KEY_RELEASE, 
  SPI_KEY_PRESSRELEASE,
  SPI_KEY_SYM,
  SPI_KEY_STRING
} AccessibleKeySynthType;
</pre>
<p>
Specifies the type of a generated event.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="SPI-KEY-PRESS:CAPS"></a><span class="term"><code class="literal">SPI_KEY_PRESS</code></span></p></td>
<td>Generates a keypress event (requires a subsequent <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-KEY-RELEASE:CAPS"><span class="type">SPI_KEY_RELEASE</span></a> event)
</td>
</tr>
<tr>
<td><p><a name="SPI-KEY-RELEASE:CAPS"></a><span class="term"><code class="literal">SPI_KEY_RELEASE</code></span></p></td>
<td>Generates a key-release event
</td>
</tr>
<tr>
<td><p><a name="SPI-KEY-PRESSRELEASE:CAPS"></a><span class="term"><code class="literal">SPI_KEY_PRESSRELEASE</code></span></p></td>
<td>Generates a key press/release event pair.
</td>
</tr>
<tr>
<td><p><a name="SPI-KEY-SYM:CAPS"></a><span class="term"><code class="literal">SPI_KEY_SYM</code></span></p></td>
<td>Injects a "keysym" event into the stream, as if a press/release pair occurred; allows 
the user to specify the key via its symbolic name, as opposed to simulating a hardware press of a 
specific key.
</td>
</tr>
<tr>
<td><p><a name="SPI-KEY-STRING:CAPS"></a><span class="term"><code class="literal">SPI_KEY_STRING</code></span></p></td>
<td>Injects one or more keysym events into the keyboard buffer, or directly inserts 
a string value into the currently focussed text widget, if the widgets supports this.
<a class="link" href="at-spi-cspi-Registry-queries.html#SPI-KEY-STRING:CAPS"><span class="type">SPI_KEY_STRING</span></a> synthesis provides a shortcut for text substring insertion, and also allows the
insertion of text which is not currently available via the current keyboard's keymap.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="SPI-getDesktopCount"></a><h3>SPI_getDesktopCount ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>                 SPI_getDesktopCount                 (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Get the number of virtual desktops.
NOTE: currently multiple virtual desktops are not implemented, this
      function always returns '1'.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>an integer indicating the number of active virtual desktops.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="SPI-getDesktop"></a><h3>SPI_getDesktop ()</h3>
<pre class="programlisting"><a class="link" href="at-spi-cspi-Accessible-Objects.html#Accessible" title="struct Accessible"><span class="returnvalue">Accessible</span></a> *        SPI_getDesktop                      (<em class="parameter"><code><span class="type">int</span> i</code></em>);</pre>
<p>
Get the virtual desktop indicated by index <em class="parameter"><code>i</code></em>.
NOTE: currently multiple virtual desktops are not implemented, this
      function always returns '1'.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>i</code></em> :</span></p></td>
<td>an integer indicating which of the accessible desktops is to be returned.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a pointer to the 'i-th' virtual desktop's <a class="link" href="at-spi-cspi-Accessible-Objects.html#Accessible" title="struct Accessible"><span class="type">Accessible</span></a> representation.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="SPI-getDesktopList"></a><h3>SPI_getDesktopList ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>                 SPI_getDesktopList                  (<em class="parameter"><code><a class="link" href="at-spi-cspi-Accessible-Objects.html#Accessible" title="struct Accessible"><span class="type">Accessible</span></a> ***desktop_list</code></em>);</pre>
<p>
Get the list of virtual desktops.  On return, <em class="parameter"><code>list</code></em> will point
    to a newly-created, NULL terminated array of virtual desktop
    pointers.
    It is the responsibility of the caller to free this array when
    it is no longer needed.
</p>
<p>
Not Yet Implemented : this implementation always returns a single
<a class="link" href="at-spi-cspi-Accessible-Objects.html#Accessible" title="struct Accessible"><span class="type">Accessible</span></a> desktop.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>desktop_list</code></em> :</span></p></td>
<td>a pointer to an array of <a class="link" href="at-spi-cspi-Accessible-Objects.html#Accessible" title="struct Accessible"><span class="type">Accessible</span></a> references.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>an integer indicating how many virtual desktops have been
placed in the list pointed to by parameter <em class="parameter"><code>list</code></em>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="SPI-freeDesktopList"></a><h3>SPI_freeDesktopList ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                SPI_freeDesktopList                 (<em class="parameter"><code><a class="link" href="at-spi-cspi-Accessible-Objects.html#Accessible" title="struct Accessible"><span class="type">Accessible</span></a> **desktop_list</code></em>);</pre>
<p>
This routine frees the memory associated with the list.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>desktop_list</code></em> :</span></p></td>
<td>a pointer to an array of <a class="link" href="at-spi-cspi-Accessible-Objects.html#Accessible" title="struct Accessible"><span class="type">Accessible</span></a> objects
as returned from <em class="parameter"><code>SPI_getDesktopList</code></em>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="AccessibleKeystrokeListenerCB"></a><h3>AccessibleKeystrokeListenerCB ()</h3>
<pre class="programlisting"><span class="returnvalue">SPIBoolean</span>          (*AccessibleKeystrokeListenerCB)    (<em class="parameter"><code>const <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeystroke" title="AccessibleKeystroke"><span class="type">AccessibleKeystroke</span></a> *stroke</code></em>,
                                                         <em class="parameter"><code><span class="type">void</span> *user_data</code></em>);</pre>
<p>
A function prototype for a callback function called when a key event notification takes place.
</p>
<p>
This is a function which is specified when creating a KeystrokeListener.
It is called when an event being listened for occurs.
If it returns TRUE, this indicates that the event should be consumed
rather than passed through; only callbacks whose listeners are
registered with the SPI_KEYLISTENER_ALL_WINDOWS or
SPI_KEYLISTENER_CANCONSUME flags can be consumed.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>stroke</code></em> :</span></p></td>
<td>the <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeystroke" title="AccessibleKeystroke"><span class="type">AccessibleKeystroke</span></a> event for which notification is taking place.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>data passed to the callback each time it is notified, according to the data
which was passed in when the listener/callback was registered.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<code class="literal">TRUE</code> if the client wishes to consume the event and prevent its
dispatch to other listeners or the currently focussed application, if
the relevant callback was registered with the <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-KEYLISTENER-CANCONSUME:CAPS"><span class="type">SPI_KEYLISTENER_CANCONSUME</span></a> flag.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="AccessibleKeyEventMask"></a><h3>AccessibleKeyEventMask</h3>
<pre class="programlisting">typedef unsigned long AccessibleKeyEventMask;
</pre>
<p>
AccessibleKeyEventMask is a set of types of key events. It is used
in SPI_registerAccessibleKeystroketListener to specify the events to be
listener for.
</p>
</div>
<hr>
<div class="refsect2">
<a name="AccessibleModifierMaskType"></a><h3>AccessibleModifierMaskType</h3>
<pre class="programlisting">typedef unsigned long AccessibleModifierMaskType;
</pre>
<p>
AccessibleModifierMaskType is a synonym for AccessibleKeymaskType.
The defined values for AccessibleModifierMaskType can be found in
libspi/keymasks.h.
</p>
</div>
<hr>
<div class="refsect2">
<a name="AccessibleKeyMaskType"></a><h3>AccessibleKeyMaskType</h3>
<pre class="programlisting">typedef AccessibleModifierMaskType AccessibleKeyMaskType;
</pre>
<p>
AccessibleKeyMaskType is a mask which is a set of key event modifiers
which is specified in SPI_registerAccessibleKeystrokeListener.
</p>
</div>
<hr>
<div class="refsect2">
<a name="AccessibleKeyEventType"></a><h3>AccessibleKeyEventType</h3>
<pre class="programlisting">typedef AccessibleDeviceEventType AccessibleKeyEventType;
</pre>
<p>
This is a synonym for AccessibleDeviceEventType
</p>
</div>
<hr>
<div class="refsect2">
<a name="AccessibleKeyListenerSyncType"></a><h3>enum AccessibleKeyListenerSyncType</h3>
<pre class="programlisting">typedef enum {
  SPI_KEYLISTENER_NOSYNC = 0,
  SPI_KEYLISTENER_SYNCHRONOUS = 1,
  SPI_KEYLISTENER_CANCONSUME = 2,
  SPI_KEYLISTENER_ALL_WINDOWS = 4
} AccessibleKeyListenerSyncType;
</pre>
<p>
Specified the tyupe of a key listener event.
Certain of the values above can and should be bitwise-'OR'ed
together, observing the compatibility limitations specified in the description of
each value.  For instance, <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-KEYLISTENER-ALL-WINDOWS:CAPS"><span class="type">SPI_KEYLISTENER_ALL_WINDOWS</span></a> | <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-KEYLISTENER-CANCONSUME:CAPS"><span class="type">SPI_KEYLISTENER_CANCONSUME</span></a> is
a commonly used combination which gives the AT complete control over the delivery of matching
events.  However, such filters should be used sparingly as they may have a negative impact on 
system performance.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="SPI-KEYLISTENER-NOSYNC:CAPS"></a><span class="term"><code class="literal">SPI_KEYLISTENER_NOSYNC</code></span></p></td>
<td>Events may be delivered asynchronously, 
which means in some cases they may already have been delivered to the 
application before the AT client receives the notification.  
</td>
</tr>
<tr>
<td><p><a name="SPI-KEYLISTENER-SYNCHRONOUS:CAPS"></a><span class="term"><code class="literal">SPI_KEYLISTENER_SYNCHRONOUS</code></span></p></td>
<td>Events are delivered synchronously, before the 
currently focussed application sees them.  
</td>
</tr>
<tr>
<td><p><a name="SPI-KEYLISTENER-CANCONSUME:CAPS"></a><span class="term"><code class="literal">SPI_KEYLISTENER_CANCONSUME</code></span></p></td>
<td>Events may be consumed by the AT client.  Presumes and
requires <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-KEYLISTENER-SYNCHRONOUS:CAPS"><span class="type">SPI_KEYLISTENER_SYNCHRONOUS</span></a>, incompatible with <a class="link" href="at-spi-cspi-Registry-queries.html#SPI-KEYLISTENER-NOSYNC:CAPS"><span class="type">SPI_KEYLISTENER_NOSYNC</span></a>.
</td>
</tr>
<tr>
<td><p><a name="SPI-KEYLISTENER-ALL-WINDOWS:CAPS"></a><span class="term"><code class="literal">SPI_KEYLISTENER_ALL_WINDOWS</code></span></p></td>
<td>Events are received not from the application toolkit layer, but
from the device driver or windowing system subsystem; such notifications are 'global' in the 
sense that they are not broken or defeated by applications that participate poorly
in the accessibility APIs, or not at all; however because of the intrusive nature of
such snooping, it can have side-effects on certain older platforms.  If unconditional
event notifications, even when inaccessible or "broken" applications have focus, are not
required, it may be best to avoid this enum value/flag.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="AccessibleKeystroke"></a><h3>AccessibleKeystroke</h3>
<pre class="programlisting">typedef AccessibleDeviceEvent AccessibleKeystroke;
</pre>
<p>
This is a synonym for AccessibleDeviceEvent.
</p>
</div>
<hr>
<div class="refsect2">
<a name="SPI-createAccessibleKeySet"></a><h3>SPI_createAccessibleKeySet ()</h3>
<pre class="programlisting"><span class="returnvalue">AccessibleKeySet</span> *  SPI_createAccessibleKeySet          (<em class="parameter"><code><span class="type">int</span> len</code></em>,
                                                         <em class="parameter"><code>const <span class="type">char</span> *keysyms</code></em>,
                                                         <em class="parameter"><code><span class="type">short</span> *keycodes</code></em>,
                                                         <em class="parameter"><code>const <span class="type">char</span> **keystrings</code></em>);</pre>
<p>
Create a new <span class="type">AccessibleKeySet</span> of a specified length.
A KeySet is used typically to match key event values, and a matches are made
using the following criteria: a match exists with a key event if all non-null
i-th members of the keyset match the key event.
If both keystring and keysym values are NULL, a keycode value match is
forced, thus the match for keysym=0, keycode=0, keystring=NULL is
keycode 0.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>len</code></em> :</span></p></td>
<td>the number of key values in the key set.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>keysyms</code></em> :</span></p></td>
<td>a UTF-8 string containing symbolic key values to be matched, or NULL if
matching is performed against other key values instead.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>keycodes</code></em> :</span></p></td>
<td>an array of unsigned short values which are the hardware keycodes
to be matched, or NULL if the keyset is specified solely by keysyms
and/or keystrings.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>keystrings</code></em> :</span></p></td>
<td>an array of null-terminated character strings which specify key
name values to match, or NULL if the keyset is specified solely by
keycodes and/or keysyms.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a pointer to a newly-created <span class="type">AccessibleKeySet</span>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="SPI-freeAccessibleKeySet"></a><h3>SPI_freeAccessibleKeySet ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                SPI_freeAccessibleKeySet            (<em class="parameter"><code><span class="type">AccessibleKeySet</span> *keyset</code></em>);</pre>
<p>
Release the memory used by an AccessibleKeySet.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>keyset</code></em> :</span></p></td>
<td>An AccessibleKeyset to free.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="SPI-createAccessibleKeystrokeListener"></a><h3>SPI_createAccessibleKeystrokeListener ()</h3>
<pre class="programlisting"><span class="returnvalue">AccessibleKeystrokeListener</span> * SPI_createAccessibleKeystrokeListener
                                                        (<em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeystrokeListenerCB" title="AccessibleKeystrokeListenerCB ()"><span class="type">AccessibleKeystrokeListenerCB</span></a> callback</code></em>,
                                                         <em class="parameter"><code><span class="type">void</span> *user_data</code></em>);</pre>
<p>
Create a new <span class="type">AccessibleKeystrokeListener</span> with a specified callback function.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>callback</code></em> :</span></p></td>
<td>an <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeystrokeListenerCB" title="AccessibleKeystrokeListenerCB ()"><span class="type">AccessibleKeystrokeListenerCB</span></a> callback function, or NULL.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>a pointer to data which will be passed to the callback when invoked.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a pointer to a newly-created <span class="type">AccessibleKeystrokeListener</span>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="SPI-registerGlobalEventListener"></a><h3>SPI_registerGlobalEventListener ()</h3>
<pre class="programlisting"><span class="returnvalue">SPIBoolean</span>          SPI_registerGlobalEventListener     (<em class="parameter"><code><span class="type">AccessibleEventListener</span> *listener</code></em>,
                                                         <em class="parameter"><code>const <span class="type">char</span> *eventType</code></em>);</pre>
<p>
Legal object event types:
</p>
<p>
   (property change events)
</p>
<p>
           object:property-change
           object:property-change:accessible-name
           object:property-change:accessible-description
           object:property-change:accessible-parent
           object:property-change:accessible-value
           object:property-change:accessible-role
           object:property-change:accessible-table-caption
           object:property-change:accessible-table-column-description
           object:property-change:accessible-table-column-header
           object:property-change:accessible-table-row-description
           object:property-change:accessible-table-row-header
           object:property-change:accessible-table-summary
</p>
<p>
   (other object events)
</p>
<p>
           object:state-changed 
           object:children-changed
           object:visible-data-changed
           object:selection-changed
           object:text-selection-changed
           object:text-changed
           object:text-caret-moved
           object:row-inserted
           object:row-reordered
           object:row-deleted
           object:column-inserted
           object:column-reordered
           object:column-deleted
           object:model-changed
           object:active-descendant-changed
</p>
<p>
 (window events)
</p>
<p>
           window:minimize
           window:maximize
           window:restore
           window:close
           window:create
           window:reparent
           window:desktop-create
           window:desktop-destroy
           window:activate
           window:deactivate
           window:raise
           window:lower
           window:move
           window:resize
           window:shade
           window:unshade
           window:restyle
</p>
<p>
 (other events)
</p>
<p>
           focus:
           mouse:abs
           mouse:rel
           mouse:b1p
           mouse:b1r
           mouse:b2p
           mouse:b2r
           mouse:b3p
           mouse:b3r
</p>
<p>
NOTE: this string may be UTF-8, but should not contain byte value 56
           (ascii ':'), except as a delimiter, since non-UTF-8 string
           delimiting functions are used internally.
           In general, listening to
           toolkit-specific events is not recommended.
</p>
<p>
Add an in-process callback function to an existing AccessibleEventListener.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>listener</code></em> :</span></p></td>
<td>the <span class="type">AccessibleEventListener</span> to be registered against an
event type.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>eventType</code></em> :</span></p></td>
<td>a character string indicating the type of events for which
notification is requested.  Format is
EventClass:major_type:minor_type:detail
where all subfields other than EventClass are optional.
EventClasses include "object", "window", "mouse",
and toolkit events (e.g. "Gtk", "AWT").
Examples: "focus:", "Gtk:GtkWidget:button-press-event".</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<span class="type">TRUE</span> if successful, otherwise <span class="type">FALSE</span>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="SPI-deregisterGlobalEventListener"></a><h3>SPI_deregisterGlobalEventListener ()</h3>
<pre class="programlisting"><span class="returnvalue">SPIBoolean</span>          SPI_deregisterGlobalEventListener   (<em class="parameter"><code><span class="type">AccessibleEventListener</span> *listener</code></em>,
                                                         <em class="parameter"><code>const <span class="type">char</span> *eventType</code></em>);</pre>
<p>
deregisters an AccessibleEventListener from the registry, for a specific
            event type.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>listener</code></em> :</span></p></td>
<td>the <span class="type">AccessibleEventListener</span> registered against an event type.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>eventType</code></em> :</span></p></td>
<td>a string specifying the event type for which this
listener is to be deregistered.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<span class="type">TRUE</span> if successful, otherwise <span class="type">FALSE</span>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="SPI-deregisterGlobalEventListenerAll"></a><h3>SPI_deregisterGlobalEventListenerAll ()</h3>
<pre class="programlisting"><span class="returnvalue">SPIBoolean</span>          SPI_deregisterGlobalEventListenerAll
                                                        (<em class="parameter"><code><span class="type">AccessibleEventListener</span> *listener</code></em>);</pre>
<p>
deregisters an AccessibleEventListener from the registry, for all
           event types it may be listening to. Use
           AccessibleEventListener_unref to release the
           listener reference.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>listener</code></em> :</span></p></td>
<td>the <span class="type">AccessibleEventListener</span> to be registered against
an event type.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<span class="type">TRUE</span> if successful, otherwise <span class="type">FALSE</span>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="SPI-registerAccessibleKeystrokeListener"></a><h3>SPI_registerAccessibleKeystrokeListener ()</h3>
<pre class="programlisting"><span class="returnvalue">SPIBoolean</span>          SPI_registerAccessibleKeystrokeListener
                                                        (<em class="parameter"><code><span class="type">AccessibleKeystrokeListener</span> *listener</code></em>,
                                                         <em class="parameter"><code><span class="type">AccessibleKeySet</span> *keys</code></em>,
                                                         <em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeyMaskType" title="AccessibleKeyMaskType"><span class="type">AccessibleKeyMaskType</span></a> modmask</code></em>,
                                                         <em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeyEventMask" title="AccessibleKeyEventMask"><span class="type">AccessibleKeyEventMask</span></a> eventmask</code></em>,
                                                         <em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeyListenerSyncType" title="enum AccessibleKeyListenerSyncType"><span class="type">AccessibleKeyListenerSyncType</span></a> sync_type</code></em>);</pre>
<p>
Register a listener for keystroke events, either pre-emptively for
            all windows (SPI_KEYLISTENER_ALL_WINDOWS),
            non-preemptively (SPI_KEYLISTENER_NOSYNC), or
            pre-emptively at the toolkit level (SPI_KEYLISTENER_CANCONSUME).
            If ALL_WINDOWS or CANCONSUME are used, the event is consumed
            upon receipt if one of <em class="parameter"><code>listener</code></em>'s callbacks returns <span class="type">TRUE</span>.
            ( Other sync_type values may be available in the future )
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>listener</code></em> :</span></p></td>
<td>a pointer to the <span class="type">AccessibleKeystrokeListener</span> for which
keystroke events are requested.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>keys</code></em> :</span></p></td>
<td>a pointer to the <span class="type">AccessibleKeySet</span> indicating which
keystroke events are requested, or <span class="type">SPI_KEYSET_ALL_KEYS</span>
to indicate that all keycodes and keyvals for the specified
modifier set are to be included.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>modmask</code></em> :</span></p></td>
<td>an <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeyMaskType" title="AccessibleKeyMaskType"><span class="type">AccessibleKeyMaskType</span></a> mask indicating which
key event modifiers must be set in combination with <em class="parameter"><code>keys</code></em>,
events will only be reported for key events for which all
modifiers in <em class="parameter"><code>modmask</code></em> are set.  If you wish to listen for
events with multiple modifier combinations you must call
<code class="function">registerAccessibleKeystrokeListener()</code> once for each combination.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>eventmask</code></em> :</span></p></td>
<td>an <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeyMaskType" title="AccessibleKeyMaskType"><span class="type">AccessibleKeyMaskType</span></a> mask indicating which
types of key events are requested (<a class="link" href="at-spi-cspi-Registry-queries.html#SPI-KEY-PRESSED:CAPS"><span class="type">SPI_KEY_PRESSED</span></a>, etc.).</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>sync_type</code></em> :</span></p></td>
<td>a <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeyListenerSyncType" title="enum AccessibleKeyListenerSyncType"><span class="type">AccessibleKeyListenerSyncType</span></a> parameter indicating
the behavior of the notification/listener transaction.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<span class="type">TRUE</span> if successful, otherwise <span class="type">FALSE</span>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="SPI-deregisterAccessibleKeystrokeListener"></a><h3>SPI_deregisterAccessibleKeystrokeListener ()</h3>
<pre class="programlisting"><span class="returnvalue">SPIBoolean</span>          SPI_deregisterAccessibleKeystrokeListener
                                                        (<em class="parameter"><code><span class="type">AccessibleKeystrokeListener</span> *listener</code></em>,
                                                         <em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeyMaskType" title="AccessibleKeyMaskType"><span class="type">AccessibleKeyMaskType</span></a> modmask</code></em>);</pre>
<p>
Removes a keystroke event listener from the registry's listener queue,
           ceasing notification of events with modifiers matching <em class="parameter"><code>modmask</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>listener</code></em> :</span></p></td>
<td>a pointer to the <span class="type">AccessibleKeystrokeListener</span> for which
keystroke events are requested.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>modmask</code></em> :</span></p></td>
<td>the key modifier mask for which this listener is to be
'deregistered' (of type <span class="type">AccessibleeyMaskType</span>).</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<span class="type">TRUE</span> if successful, otherwise <span class="type">FALSE</span>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="AccessibleKeystrokeListener-unref"></a><h3>AccessibleKeystrokeListener_unref ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                AccessibleKeystrokeListener_unref   (<em class="parameter"><code><span class="type">AccessibleKeystrokeListener</span> *listener</code></em>);</pre>
<p>
Decrements an <span class="type">AccessibleKeystrokeListener</span>'s reference count.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>listener</code></em> :</span></p></td>
<td>a pointer to the <span class="type">AccessibleKeystrokeListener</span> being operated on.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="AccessibleKeystrokeListener-removeCallback"></a><h3>AccessibleKeystrokeListener_removeCallback ()</h3>
<pre class="programlisting"><span class="returnvalue">SPIBoolean</span>          AccessibleKeystrokeListener_removeCallback
                                                        (<em class="parameter"><code><span class="type">AccessibleKeystrokeListener</span> *listener</code></em>,
                                                         <em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeystrokeListenerCB" title="AccessibleKeystrokeListenerCB ()"><span class="type">AccessibleKeystrokeListenerCB</span></a> callback</code></em>);</pre>
<p>
Remove an in-process callback function from an existing <span class="type">AccessibleKeystrokeListener</span>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>listener</code></em> :</span></p></td>
<td>the <span class="type">AccessibleKeystrokeListener</span> instance to modify.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>callback</code></em> :</span></p></td>
<td>an <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeystrokeListenerCB" title="AccessibleKeystrokeListenerCB ()"><span class="type">AccessibleKeystrokeListenerCB</span></a> function pointer.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<span class="type">TRUE</span> if successful, otherwise <span class="type">FALSE</span>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="AccessibleKeystrokeListener-addCallback"></a><h3>AccessibleKeystrokeListener_addCallback ()</h3>
<pre class="programlisting"><span class="returnvalue">SPIBoolean</span>          AccessibleKeystrokeListener_addCallback
                                                        (<em class="parameter"><code><span class="type">AccessibleKeystrokeListener</span> *listener</code></em>,
                                                         <em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeystrokeListenerCB" title="AccessibleKeystrokeListenerCB ()"><span class="type">AccessibleKeystrokeListenerCB</span></a> callback</code></em>,
                                                         <em class="parameter"><code><span class="type">void</span> *user_data</code></em>);</pre>
<p>
Add an in-process callback function to an existing <span class="type">AccessibleKeystrokeListener</span>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>listener</code></em> :</span></p></td>
<td>the <span class="type">AccessibleKeystrokeListener</span> instance to modify.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>callback</code></em> :</span></p></td>
<td>an <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeystrokeListenerCB" title="AccessibleKeystrokeListenerCB ()"><span class="type">AccessibleKeystrokeListenerCB</span></a> function pointer.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>a pointer to data which will be passed to the callback when invoked.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<span class="type">TRUE</span> if successful, otherwise <span class="type">FALSE</span>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="SPI-generateKeyboardEvent"></a><h3>SPI_generateKeyboardEvent ()</h3>
<pre class="programlisting"><span class="returnvalue">SPIBoolean</span>          SPI_generateKeyboardEvent           (<em class="parameter"><code>long <span class="type">int</span> keyval</code></em>,
                                                         <em class="parameter"><code><span class="type">char</span> *keystring</code></em>,
                                                         <em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeySynthType" title="enum AccessibleKeySynthType"><span class="type">AccessibleKeySynthType</span></a> synth_type</code></em>);</pre>
<p>
Synthesize a keyboard event (as if a hardware keyboard event occurred in the
current UI context).
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>keyval</code></em> :</span></p></td>
<td>a long integer indicating the keycode or keysym of the key event
being synthesized.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>keystring</code></em> :</span></p></td>
<td>an (optional) UTF-8 string which, if <em class="parameter"><code>keyval</code></em> is NULL,
indicates a 'composed' keyboard input string which is
being synthesized; this type of keyboard event synthesis does
not emulate hardware keypresses but injects the string
as though a composing input method (such as XIM) were used.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>synth_type</code></em> :</span></p></td>
<td>a <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleKeySynthType" title="enum AccessibleKeySynthType"><span class="type">AccessibleKeySynthType</span></a> flag indicating whether <em class="parameter"><code>keyval</code></em>
is to be interpreted as a keysym rather than a keycode
(CSPI_KEYSYM), or whether to synthesize
SPI_KEY_PRESS, SPI_KEY_RELEASE, or both (SPI_KEY_PRESSRELEASE).</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<span class="type">TRUE</span> if successful, otherwise <span class="type">FALSE</span>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="SPI-generateMouseEvent"></a><h3>SPI_generateMouseEvent ()</h3>
<pre class="programlisting"><span class="returnvalue">SPIBoolean</span>          SPI_generateMouseEvent              (<em class="parameter"><code>long <span class="type">int</span> x</code></em>,
                                                         <em class="parameter"><code>long <span class="type">int</span> y</code></em>,
                                                         <em class="parameter"><code><span class="type">char</span> *name</code></em>);</pre>
<p>
Synthesize a mouse event at a specific screen coordinate.
Most AT clients should use the <span class="type">AccessibleAction</span> interface when
tempted to generate mouse events, rather than this method.
Event names: b1p = button 1 press; b2r = button 2 release;
             b3c = button 3 click; b2d = button 2 double-click;
             abs = absolute motion; rel = relative motion.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td>a <span class="type">long</span> indicating the screen x coordinate of the mouse event.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em> :</span></p></td>
<td>a <span class="type">long</span> indicating the screen y coordinate of the mouse event.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
<td>a string indicating which mouse event to be synthesized
(e.g. "b1p", "b1c", "b2r", "rel", "abs").</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<span class="type">TRUE</span> if successful, otherwise <span class="type">FALSE</span>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="AccessibleDeviceEvent"></a><h3>AccessibleDeviceEvent</h3>
<pre class="programlisting">typedef struct {
  long                   keyID;
  short                  keycode;
  char *                 keystring;
  long                   timestamp;
  AccessibleDeviceEventType type;
  unsigned short         modifiers;
  SPIBoolean             is_text;	
} AccessibleDeviceEvent;
</pre>
<p>
A structure encapsulating information relevant to a device event notification.
</p>
<p>
AccessibleDeviceEvent is a struct which encapsulates a device event.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><span class="type">char</span> *<em class="structfield"><code><a name="AccessibleDeviceEvent.keystring"></a>keystring</code></em>;</span></p></td>
<td>A symbolic name for the key or switch, or, if is_text is true, a string approximating the
inserted text characters which would result from this event, if a text entry field has keyboard focus.</td>
</tr>
<tr>
<td><p><span class="term"><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceEventType" title="enum AccessibleDeviceEventType"><span class="type">AccessibleDeviceEventType</span></a> <em class="structfield"><code><a name="AccessibleDeviceEvent.type"></a>type</code></em>;</span></p></td>
<td>The <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceEventType" title="enum AccessibleDeviceEventType"><span class="type">AccessibleDeviceEventType</span></a> identifying the specific type of event.</td>
</tr>
<tr>
<td><p><span class="term">unsigned <span class="type">short</span> <em class="structfield"><code><a name="AccessibleDeviceEvent.modifiers"></a>modifiers</code></em>;</span></p></td>
<td></td>
</tr>
<tr>
<td><p><span class="term"><span class="type">SPIBoolean</span> <em class="structfield"><code><a name="AccessibleDeviceEvent.is-text"></a>is_text</code></em>;</span></p></td>
<td>A boolean value indicating whether the event represents 'printable' text (i.e. whether it
changes the current insertion buffer of a focussed text entry component or not).  Whitespace
is considered "printable" in this context, since it typically inserts characters into the buffer.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="AccessibleDeviceEventMask"></a><h3>AccessibleDeviceEventMask</h3>
<pre class="programlisting">typedef unsigned long AccessibleDeviceEventMask;
</pre>
<p>
AccessibleDeviceEventMask is a set of types of key events. It is used
in SPI_registerDeviceEventListener to specify the events to be listener for.
</p>
</div>
<hr>
<div class="refsect2">
<a name="AccessibleDeviceEventType"></a><h3>enum AccessibleDeviceEventType</h3>
<pre class="programlisting">typedef enum {
  SPI_KEY_PRESSED  = 1&lt;&lt;0,
  SPI_KEY_RELEASED = 1&lt;&lt;1,
  SPI_BUTTON_PRESSED = 1&lt;&lt;2,
  SPI_BUTTON_RELEASED = 1&lt;&lt;3
} AccessibleDeviceEventType;
</pre>
<p>
The type of an AccessibleDeviceEvent.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="SPI-KEY-PRESSED:CAPS"></a><span class="term"><code class="literal">SPI_KEY_PRESSED</code></span></p></td>
<td>A device key has been pressed.
</td>
</tr>
<tr>
<td><p><a name="SPI-KEY-RELEASED:CAPS"></a><span class="term"><code class="literal">SPI_KEY_RELEASED</code></span></p></td>
<td>A device key has been released.
</td>
</tr>
<tr>
<td><p><a name="SPI-BUTTON-PRESSED:CAPS"></a><span class="term"><code class="literal">SPI_BUTTON_PRESSED</code></span></p></td>
<td>A device button or switch (other than a keyboard key) 
has been pressed.
</td>
</tr>
<tr>
<td><p><a name="SPI-BUTTON-RELEASED:CAPS"></a><span class="term"><code class="literal">SPI_BUTTON_RELEASED</code></span></p></td>
<td>A device button or switch has been released.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="AccessibleDeviceListenerCB"></a><h3>AccessibleDeviceListenerCB ()</h3>
<pre class="programlisting"><span class="returnvalue">SPIBoolean</span>          (*AccessibleDeviceListenerCB)       (<em class="parameter"><code>const <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceEvent" title="AccessibleDeviceEvent"><span class="type">AccessibleDeviceEvent</span></a> *stroke</code></em>,
                                                         <em class="parameter"><code><span class="type">void</span> *user_data</code></em>);</pre>
<p>
A callback function prototype via which clients receive device event notifications.
</p>
<p>
This is a function which is specified when creating a DeviceListener.
It is called when an event being listened for occurs.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>stroke</code></em> :</span></p></td>
<td>The <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceEvent" title="AccessibleDeviceEvent"><span class="type">AccessibleDeviceEvent</span></a> for which notification is being received.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>Data which is passed to the client each time this callback is notified.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<code class="literal">TRUE</code> if the client wishes to consume/preempt the event, preventing it from being
relayed to the currently focussed application, <code class="literal">FALSE</code> if the event delivery should proceed as normal.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="SPI-createAccessibleDeviceListener"></a><h3>SPI_createAccessibleDeviceListener ()</h3>
<pre class="programlisting"><span class="returnvalue">AccessibleDeviceListener</span> * SPI_createAccessibleDeviceListener
                                                        (<em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceListenerCB" title="AccessibleDeviceListenerCB ()"><span class="type">AccessibleDeviceListenerCB</span></a> callback</code></em>,
                                                         <em class="parameter"><code><span class="type">void</span> *user_data</code></em>);</pre>
<p>
Create a new <span class="type">AccessibleDeviceListener</span> with a specified callback function.
</p>
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<td><p><span class="term"><em class="parameter"><code>callback</code></em> :</span></p></td>
<td>an <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceListenerCB" title="AccessibleDeviceListenerCB ()"><span class="type">AccessibleDeviceListenerCB</span></a> callback function, or NULL.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>a pointer to data which will be passed to the callback when invoked.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a pointer to a newly-created <span class="type">AccessibleDeviceListener</span>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="SPI-registerDeviceEventListener"></a><h3>SPI_registerDeviceEventListener ()</h3>
<pre class="programlisting"><span class="returnvalue">SPIBoolean</span>          SPI_registerDeviceEventListener     (<em class="parameter"><code><span class="type">AccessibleDeviceListener</span> *listener</code></em>,
                                                         <em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceEventMask" title="AccessibleDeviceEventMask"><span class="type">AccessibleDeviceEventMask</span></a> eventmask</code></em>,
                                                         <em class="parameter"><code><span class="type">void</span> *filter</code></em>);</pre>
<p>
Register a listener for device events, for instance button events.
</p>
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<td><p><span class="term"><em class="parameter"><code>listener</code></em> :</span></p></td>
<td>a pointer to the <span class="type">AccessibleDeviceListener</span> which requests
the events.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>eventmask</code></em> :</span></p></td>
<td>an <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceEventMask" title="AccessibleDeviceEventMask"><span class="type">AccessibleDeviceEventMask</span></a> mask indicating which
types of key events are requested (<a class="link" href="at-spi-cspi-Registry-queries.html#SPI-KEY-PRESSED:CAPS"><span class="type">SPI_KEY_PRESSED</span></a>, etc.).</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>filter</code></em> :</span></p></td>
<td>Unused parameter.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<span class="type">TRUE</span> if successful, otherwise <span class="type">FALSE</span>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="SPI-deregisterDeviceEventListener"></a><h3>SPI_deregisterDeviceEventListener ()</h3>
<pre class="programlisting"><span class="returnvalue">SPIBoolean</span>          SPI_deregisterDeviceEventListener   (<em class="parameter"><code><span class="type">AccessibleDeviceListener</span> *listener</code></em>,
                                                         <em class="parameter"><code><span class="type">void</span> *filter</code></em>);</pre>
<p>
Removes a device event listener from the registry's listener queue,
           ceasing notification of events of the specified type.
</p>
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<td><p><span class="term"><em class="parameter"><code>listener</code></em> :</span></p></td>
<td>a pointer to the <span class="type">AccessibleDeviceListener</span> for which
device events are requested.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>filter</code></em> :</span></p></td>
<td>Unused parameter.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<span class="type">TRUE</span> if successful, otherwise <span class="type">FALSE</span>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="AccessibleDeviceListener-addCallback"></a><h3>AccessibleDeviceListener_addCallback ()</h3>
<pre class="programlisting"><span class="returnvalue">SPIBoolean</span>          AccessibleDeviceListener_addCallback
                                                        (<em class="parameter"><code><span class="type">AccessibleDeviceListener</span> *listener</code></em>,
                                                         <em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceListenerCB" title="AccessibleDeviceListenerCB ()"><span class="type">AccessibleDeviceListenerCB</span></a> callback</code></em>,
                                                         <em class="parameter"><code><span class="type">void</span> *user_data</code></em>);</pre>
<p>
Add an in-process callback function to an existing <span class="type">AccessibleDeviceListener</span>.
</p>
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<td><p><span class="term"><em class="parameter"><code>listener</code></em> :</span></p></td>
<td>the <span class="type">AccessibleDeviceListener</span> instance to modify.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>callback</code></em> :</span></p></td>
<td>an <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceListenerCB" title="AccessibleDeviceListenerCB ()"><span class="type">AccessibleDeviceListenerCB</span></a> function pointer.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>a pointer to data which will be passed to the callback when invoked.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<span class="type">TRUE</span> if successful, otherwise <span class="type">FALSE</span>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="AccessibleDeviceListener-removeCallback"></a><h3>AccessibleDeviceListener_removeCallback ()</h3>
<pre class="programlisting"><span class="returnvalue">SPIBoolean</span>          AccessibleDeviceListener_removeCallback
                                                        (<em class="parameter"><code><span class="type">AccessibleDeviceListener</span> *listener</code></em>,
                                                         <em class="parameter"><code><a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceListenerCB" title="AccessibleDeviceListenerCB ()"><span class="type">AccessibleDeviceListenerCB</span></a> callback</code></em>);</pre>
<p>
Remove an in-process callback function from an existing <span class="type">AccessibleDeviceListener</span>.
</p>
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<col align="left" valign="top">
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<td><p><span class="term"><em class="parameter"><code>listener</code></em> :</span></p></td>
<td>the <span class="type">AccessibleDeviceListener</span> instance to modify.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>callback</code></em> :</span></p></td>
<td>an <a class="link" href="at-spi-cspi-Registry-queries.html#AccessibleDeviceListenerCB" title="AccessibleDeviceListenerCB ()"><span class="type">AccessibleDeviceListenerCB</span></a> function pointer.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<span class="type">TRUE</span> if successful, otherwise <span class="type">FALSE</span>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="AccessibleDeviceListener-unref"></a><h3>AccessibleDeviceListener_unref ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                AccessibleDeviceListener_unref      (<em class="parameter"><code><span class="type">AccessibleDeviceListener</span> *listener</code></em>);</pre>
<p>
Decrements an <span class="type">AccessibleDeviceListener</span>'s reference count.
</p>
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<td><p><span class="term"><em class="parameter"><code>listener</code></em> :</span></p></td>
<td>a pointer to the <span class="type">AccessibleDeviceListener</span> being operated on.</td>
</tr></tbody>
</table></div>
</div>
</div>
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