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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<a href="#libbonobo-bonobo-item-handler.synopsis" class="shortcut">Top</a>
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                  <a href="#libbonobo-bonobo-item-handler.description" class="shortcut">Description</a>
                   | 
                  <a href="#libbonobo-bonobo-item-handler.object-hierarchy" class="shortcut">Object Hierarchy</a>
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<div class="refentry" title="BonoboItemHandler">
<a name="libbonobo-bonobo-item-handler"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="libbonobo-bonobo-item-handler.top_of_page"></a>BonoboItemHandler</span></h2>
<p>BonoboItemHandler — Simple Moniker Arguments</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv" title="Synopsis">
<a name="libbonobo-bonobo-item-handler.synopsis"></a><h2>Synopsis</h2>
<a name="BonoboItemHandler"></a><pre class="synopsis">                    <a class="link" href="libbonobo-bonobo-item-handler.html#BonoboItemHandler-struct" title="BonoboItemHandler">BonoboItemHandler</a>;
                    <a class="link" href="libbonobo-bonobo-item-handler.html#BonoboItemHandlerClass" title="BonoboItemHandlerClass">BonoboItemHandlerClass</a>;
<a class="link" href="libbonobo-bonobo-item-handler.html#BonoboItemHandler"><span class="returnvalue">BonoboItemHandler</span></a> * <a class="link" href="libbonobo-bonobo-item-handler.html#bonobo-item-handler-new" title="bonobo_item_handler_new ()">bonobo_item_handler_new</a>             (<em class="parameter"><code><span class="type">BonoboItemHandlerEnumObjectsFn</span> enum_objects</code></em>,
                                                         <em class="parameter"><code><span class="type">BonoboItemHandlerGetObjectFn</span> get_object</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);
<a class="link" href="libbonobo-bonobo-item-handler.html#BonoboItemHandler"><span class="returnvalue">BonoboItemHandler</span></a> * <a class="link" href="libbonobo-bonobo-item-handler.html#bonobo-item-handler-new-closure" title="bonobo_item_handler_new_closure ()">bonobo_item_handler_new_closure</a>     (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobject/gobject-Closures.html#GClosure"><span class="type">GClosure</span></a> *enum_objects</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobject/gobject-Closures.html#GClosure"><span class="type">GClosure</span></a> *get_object</code></em>);
<a class="link" href="libbonobo-bonobo-item-handler.html#BonoboItemHandler"><span class="returnvalue">BonoboItemHandler</span></a> * <a class="link" href="libbonobo-bonobo-item-handler.html#bonobo-item-handler-construct" title="bonobo_item_handler_construct ()">bonobo_item_handler_construct</a>       (<em class="parameter"><code><a class="link" href="libbonobo-bonobo-item-handler.html#BonoboItemHandler"><span class="type">BonoboItemHandler</span></a> *handler</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobject/gobject-Closures.html#GClosure"><span class="type">GClosure</span></a> *enum_objects</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobject/gobject-Closures.html#GClosure"><span class="type">GClosure</span></a> *get_object</code></em>);
                    <a class="link" href="libbonobo-bonobo-item-handler.html#BonoboItemOption" title="BonoboItemOption">BonoboItemOption</a>;
<a href="/usr/share/gtk-doc/html/glib/glib-Singly-Linked-Lists.html#GSList"><span class="returnvalue">GSList</span></a> *            <a class="link" href="libbonobo-bonobo-item-handler.html#bonobo-item-option-parse" title="bonobo_item_option_parse ()">bonobo_item_option_parse</a>            (<em class="parameter"><code>const <span class="type">char</span> *option_string</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="libbonobo-bonobo-item-handler.html#bonobo-item-options-free" title="bonobo_item_options_free ()">bonobo_item_options_free</a>            (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Singly-Linked-Lists.html#GSList"><span class="type">GSList</span></a> *options</code></em>);
</pre>
</div>
<div class="refsect1" title="Object Hierarchy">
<a name="libbonobo-bonobo-item-handler.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
  <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a>
   +----<a class="link" href="libbonobo-bonobo-object.html#BonoboObject">BonoboObject</a>
         +----BonoboItemHandler
</pre>
</div>
<div class="refsect1" title="Description">
<a name="libbonobo-bonobo-item-handler.description"></a><h2>Description</h2>
<p>
    Sometimes you want to pass "arguments" to a component.
    Consider the component with the following OAFIID:
</p>
<p><code class="literal">OAFIID:GNOME_FileSelector</code></p>
<p>
    You might want to be able to set configuration options from
    its moniker name, without having to ever use the property bag
    API. For example:</p>
<p><code class="literal">
    OAFIID:GNOME_FileSelector!AcceptMimeTypes=image/*</code></p>
<div class="refsect2" title="Implementing it">
<a name="id430686"></a><h3>Implementing it</h3>
<p>
	Create a BonoboItemHandler.  This component will
	let you do argument parsing of any kind.</p>
<p>
	You have to provide two functions: <code class="function">enumObjects</code>
	(this can be empty) and <code class="function">getObject</code>.</p>
<p>The getObject function will be called when the moniker
	mechanism is trying to resolve a set of arguments to your
	function.</p>
<p>Like this:</p>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1
2
3
4
5
6
7
8
9
10
11
12</pre></td>
        <td class="listing_code"><pre class="programlisting">Bonobo_Unknown
<span class="function">getObject</span> <span class="symbol">(</span>BonoboItemHandler <span class="symbol">*</span>h<span class="symbol">,</span> <span class="gtkdoc kwb">const char</span> <span class="symbol">*</span>item_name<span class="symbol">,</span>
           gboolean only_if_exists<span class="symbol">,</span> gpointer data<span class="symbol">,</span>
           CORBA_Environment <span class="symbol">*</span>ev<span class="symbol">)</span>
<span class="symbol">{</span>
        MyData <span class="symbol">*</span>m <span class="symbol">=</span> data<span class="symbol">;</span>
        <span class="keyword">if</span> <span class="symbol">(</span><span class="function">strcmp</span> <span class="symbol">(</span>item_name<span class="symbol">,</span> <span class="string">&quot;friendly&quot;</span><span class="symbol">) ==</span> <span class="number">0</span><span class="symbol">){</span>
                m<span class="symbol">-&gt;</span>friendly <span class="symbol">=</span> <span class="keyword">true</span><span class="symbol">;</span>
        <span class="symbol">}</span>
        <span class="comment">/* we just return ourselves */</span>
        <span class="keyword">return</span> <span class="function"><a href="libbonobo-bonobo-object.html#bonobo-object-dup-ref">bonobo_object_dup_ref</a></span> <span class="symbol">(</span><span class="function"><a href="libbonobo-bonobo-object.html#bonobo-object-corba-objref">bonobo_object_corba_objref</a></span> <span class="symbol">(</span>h<span class="symbol">),</span> NULL<span class="symbol">);</span>
<span class="symbol">}</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p>
	So basically during the `getObject' operation you will be
	given a chance to process the `item_name' string which is
	basically like a command line argument (for the sake of
	explaining this) and based on this information you can
	customize your component.
    </p>
</div>
<hr>
<div class="refsect2" title="Sample functions">
<a name="id430738"></a><h3>Sample functions</h3>
<p>
	Sometimes you will want to specify a bunch of options to
	configure your component, like this:
    </p>
<p><code class="literal">OAFIID:MyComponent!visible=true;image=blah.png</code></p>
<p>
	So we are separating the various options with semi-colons
	here.  To simplify your code, we have provided a couple of
	functions that given the following string:</p>
<p><code class="literal">visible=true;image=blah.png</code></p>
<p>Will return a GList split with BonoboItemOptions:</p>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1
2
3
4
5
6
7</pre></td>
        <td class="listing_code"><pre class="programlisting">GSList <span class="symbol">*</span>l<span class="symbol">, *</span>x<span class="symbol">;</span>
x <span class="symbol">=</span> <span class="function"><a href="libbonobo-bonobo-item-handler.html#bonobo-item-option-parse">bonobo_item_option_parse</a></span> <span class="symbol">(</span><span class="string">&quot;visible=true;image=blah.png&quot;</span><span class="symbol">);</span>
<span class="keyword">for</span> <span class="symbol">(</span>l <span class="symbol">=</span> x<span class="symbol">;</span> l <span class="symbol">!=</span> NULL<span class="symbol">;</span> l<span class="symbol">++){</span>
	BonoboItemOption <span class="symbol">*</span>io <span class="symbol">=</span> l<span class="symbol">-&gt;</span>data<span class="symbol">;</span>
	<span class="function">printf</span> <span class="symbol">(</span><span class="string">&quot;Key=%s, Value=%s</span><span class="gtkdoc esc">\n</span><span class="string">&quot;</span><span class="symbol">,</span> io<span class="symbol">-&gt;</span>key<span class="symbol">,</span> io<span class="symbol">-&gt;</span>value<span class="symbol">);</span>
<span class="symbol">}</span>
<span class="function">bonobo_item_option_free</span> <span class="symbol">(</span>x<span class="symbol">);</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

</div>
</div>
<div class="refsect1" title="Details">
<a name="libbonobo-bonobo-item-handler.details"></a><h2>Details</h2>
<div class="refsect2" title="BonoboItemHandler">
<a name="BonoboItemHandler-struct"></a><h3>BonoboItemHandler</h3>
<pre class="programlisting">typedef struct _BonoboItemHandler BonoboItemHandler;</pre>
<p>
Bonobo::ItemHandler implementation
</p>
</div>
<hr>
<div class="refsect2" title="BonoboItemHandlerClass">
<a name="BonoboItemHandlerClass"></a><h3>BonoboItemHandlerClass</h3>
<pre class="programlisting">typedef struct {
	BonoboObjectClass parent_class;

	POA_Bonobo_ItemContainer__epv epv;
} BonoboItemHandlerClass;
</pre>
<p>
BonoboItemHandler class
</p>
</div>
<hr>
<div class="refsect2" title="bonobo_item_handler_new ()">
<a name="bonobo-item-handler-new"></a><h3>bonobo_item_handler_new ()</h3>
<pre class="programlisting"><a class="link" href="libbonobo-bonobo-item-handler.html#BonoboItemHandler"><span class="returnvalue">BonoboItemHandler</span></a> * bonobo_item_handler_new             (<em class="parameter"><code><span class="type">BonoboItemHandlerEnumObjectsFn</span> enum_objects</code></em>,
                                                         <em class="parameter"><code><span class="type">BonoboItemHandlerGetObjectFn</span> get_object</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>
Creates a new BonoboItemHandler object.  These are used to hold
client sites.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>enum_objects</code></em> :</span></p></td>
<td>callback invoked for Bonobo::ItemContainer::enum_objects
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>get_object</code></em> :</span></p></td>
<td>callback invoked for Bonobo::ItemContainer::get_objects
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>extra data passed on the callbacks
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> The newly created BonoboItemHandler object
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="bonobo_item_handler_new_closure ()">
<a name="bonobo-item-handler-new-closure"></a><h3>bonobo_item_handler_new_closure ()</h3>
<pre class="programlisting"><a class="link" href="libbonobo-bonobo-item-handler.html#BonoboItemHandler"><span class="returnvalue">BonoboItemHandler</span></a> * bonobo_item_handler_new_closure     (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobject/gobject-Closures.html#GClosure"><span class="type">GClosure</span></a> *enum_objects</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobject/gobject-Closures.html#GClosure"><span class="type">GClosure</span></a> *get_object</code></em>);</pre>
<p>
Creates a new BonoboItemHandler object.  These are used to hold
client sites.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>enum_objects</code></em> :</span></p></td>
<td>closure invoked for Bonobo::ItemContainer::enum_objects
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>get_object</code></em> :</span></p></td>
<td>closure invoked for Bonobo::ItemContainer::get_objects
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> The newly created BonoboItemHandler object
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="bonobo_item_handler_construct ()">
<a name="bonobo-item-handler-construct"></a><h3>bonobo_item_handler_construct ()</h3>
<pre class="programlisting"><a class="link" href="libbonobo-bonobo-item-handler.html#BonoboItemHandler"><span class="returnvalue">BonoboItemHandler</span></a> * bonobo_item_handler_construct       (<em class="parameter"><code><a class="link" href="libbonobo-bonobo-item-handler.html#BonoboItemHandler"><span class="type">BonoboItemHandler</span></a> *handler</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobject/gobject-Closures.html#GClosure"><span class="type">GClosure</span></a> *enum_objects</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobject/gobject-Closures.html#GClosure"><span class="type">GClosure</span></a> *get_object</code></em>);</pre>
<p>
Constructs the <em class="parameter"><code>container</code></em> BonoboObject using the provided closures
for the actual implementation.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>handler</code></em> :</span></p></td>
<td>The handler object to construct
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>enum_objects</code></em> :</span></p></td>
<td>The closure implementing enumObjects
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>get_object</code></em> :</span></p></td>
<td>The closure implementing getObject
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> The constructed BonoboItemContainer object.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="BonoboItemOption">
<a name="BonoboItemOption"></a><h3>BonoboItemOption</h3>
<pre class="programlisting">typedef struct {
	char *key;
	char *value;
} BonoboItemOption;
</pre>
<p>
A key-value pair.
</p>
</div>
<hr>
<div class="refsect2" title="bonobo_item_option_parse ()">
<a name="bonobo-item-option-parse"></a><h3>bonobo_item_option_parse ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Singly-Linked-Lists.html#GSList"><span class="returnvalue">GSList</span></a> *            bonobo_item_option_parse            (<em class="parameter"><code>const <span class="type">char</span> *option_string</code></em>);</pre>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>option_string</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="bonobo_item_options_free ()">
<a name="bonobo-item-options-free"></a><h3>bonobo_item_options_free ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                bonobo_item_options_free            (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Singly-Linked-Lists.html#GSList"><span class="type">GSList</span></a> *options</code></em>);</pre>
<p>
Use this to release a list returned by <a class="link" href="libbonobo-bonobo-item-handler.html#bonobo-item-option-parse" title="bonobo_item_option_parse ()"><code class="function">bonobo_item_option_parse()</code></a>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>options</code></em> :</span></p></td>
<td>a GSList of BonoboItemOption structures that was returned by <a class="link" href="libbonobo-bonobo-item-handler.html#bonobo-item-option-parse" title="bonobo_item_option_parse ()"><code class="function">bonobo_item_option_parse()</code></a>
</td>
</tr></tbody>
</table></div>
</div>
</div>
<div class="refsect1" title="See Also">
<a name="libbonobo-bonobo-item-handler.see-also"></a><h2>See Also</h2>
<p>
   A simplistic implementation exists in <a class="link" href="libbonobo-bonobo-item-container.html#BonoboItemContainer"><span class="type">BonoboItemContainer</span></a>.
</p>
</div>
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