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<h2><span class="refentrytitle"><a name="libbonobo-bonobo-item-handler.top_of_page"></a>BonoboItemHandler</span></h2>
<p>BonoboItemHandler — Simple Moniker Arguments</p>
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<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="libbonobo-bonobo-item-handler.functions"></a><h2>Functions</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<a class="link" href="libbonobo-bonobo-item-handler.html#BonoboItemHandler"><span class="returnvalue">BonoboItemHandler</span></a> *
</td>
<td class="function_name">
<a class="link" href="libbonobo-bonobo-item-handler.html#bonobo-item-handler-new" title="bonobo_item_handler_new ()">bonobo_item_handler_new</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="libbonobo-bonobo-item-handler.html#BonoboItemHandler"><span class="returnvalue">BonoboItemHandler</span></a> *
</td>
<td class="function_name">
<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> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="libbonobo-bonobo-item-handler.html#BonoboItemHandler"><span class="returnvalue">BonoboItemHandler</span></a> *
</td>
<td class="function_name">
<a class="link" href="libbonobo-bonobo-item-handler.html#bonobo-item-handler-construct" title="bonobo_item_handler_construct ()">bonobo_item_handler_construct</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Singly-Linked-Lists.html#GSList"><span class="returnvalue">GSList</span></a> *
</td>
<td class="function_name">
<a class="link" href="libbonobo-bonobo-item-handler.html#bonobo-item-option-parse" title="bonobo_item_option_parse ()">bonobo_item_option_parse</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="libbonobo-bonobo-item-handler.html#bonobo-item-options-free" title="bonobo_item_options_free ()">bonobo_item_options_free</a> <span class="c_punctuation">()</span>
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</div>
<a name="BonoboItemHandler"></a><div class="refsect1">
<a name="libbonobo-bonobo-item-handler.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="libbonobo-bonobo-item-handler.html#BonoboItemHandler-struct" title="struct BonoboItemHandler">BonoboItemHandler</a></td>
</tr>
<tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="libbonobo-bonobo-item-handler.html#BonoboItemHandlerClass" title="BonoboItemHandlerClass">BonoboItemHandlerClass</a></td>
</tr>
<tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="libbonobo-bonobo-item-handler.html#BonoboItemOption" title="BonoboItemOption">BonoboItemOption</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="libbonobo-bonobo-item-handler.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen"> <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a>
<span class="lineart">╰──</span> <a class="link" href="libbonobo-bonobo-object.html#BonoboObject">BonoboObject</a>
<span class="lineart">╰──</span> BonoboItemHandler
</pre>
</div>
<div class="refsect1">
<a name="libbonobo-bonobo-item-handler.description"></a><h2>Description</h2>
<p></p>
<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">
<a name="id-1.5.7.7.7"></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"><pre class="programlisting">
Bonobo_Unknown
getObject (BonoboItemHandler *h, const char *item_name,
gboolean only_if_exists, gpointer data,
CORBA_Environment *ev)
{
MyData *m = data;
if (strcmp (item_name, "friendly") == 0){
m->friendly = true;
}
/* we just return ourselves */
return bonobo_object_dup_ref (bonobo_object_corba_objref (h), NULL);
}
</pre></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">
<a name="id-1.5.7.7.8"></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"><pre class="programlisting">
GSList *l, *x;
x = bonobo_item_option_parse ("visible=true;image=blah.png");
for (l = x; l != NULL; l++){
BonoboItemOption *io = l->data;
printf ("Key=%s, Value=%s\n", io->key, io->value);
}
bonobo_item_option_free (x);
</pre></div>
</div>
</div>
<div class="refsect1">
<a name="libbonobo-bonobo-item-handler.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<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="refsect3">
<a name="id-1.5.7.8.2.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>enum_objects</p></td>
<td class="parameter_description"><p>callback invoked for Bonobo::ItemContainer::enum_objects</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>get_object</p></td>
<td class="parameter_description"><p>callback invoked for Bonobo::ItemContainer::get_objects</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>extra data passed on the callbacks</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.7.8.2.6"></a><h4>Returns</h4>
<p> The newly created BonoboItemHandler object</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<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="refsect3">
<a name="id-1.5.7.8.3.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>enum_objects</p></td>
<td class="parameter_description"><p>closure invoked for Bonobo::ItemContainer::enum_objects</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>get_object</p></td>
<td class="parameter_description"><p>closure invoked for Bonobo::ItemContainer::get_objects</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.7.8.3.6"></a><h4>Returns</h4>
<p> The newly created BonoboItemHandler object</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<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="refsect3">
<a name="id-1.5.7.8.4.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>handler</p></td>
<td class="parameter_description"><p>The handler object to construct</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>enum_objects</p></td>
<td class="parameter_description"><p>The closure implementing enumObjects</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>get_object</p></td>
<td class="parameter_description"><p>The closure implementing getObject</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.7.8.4.6"></a><h4>Returns</h4>
<p> The constructed BonoboItemContainer object.</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<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="refsect3">
<a name="id-1.5.7.8.5.5"></a><h4>Returns</h4>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<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="refsect3">
<a name="id-1.5.7.8.6.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>options</p></td>
<td class="parameter_description"><p>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></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="libbonobo-bonobo-item-handler.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="BonoboItemHandler-struct"></a><h3>struct BonoboItemHandler</h3>
<pre class="programlisting">struct BonoboItemHandler;</pre>
<p>
Bonobo::ItemHandler implementation
</p>
</div>
<hr>
<div class="refsect2">
<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">
<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>
</div>
<div class="refsect1">
<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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