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<a href="#libbonobo-bonobo-persist-file.object-hierarchy" class="shortcut">Object Hierarchy</a>
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<div class="refentry" title="BonoboPersistFile">
<a name="libbonobo-bonobo-persist-file"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="libbonobo-bonobo-persist-file.top_of_page"></a>BonoboPersistFile</span></h2>
<p>BonoboPersistFile — Interface for anything that can save / load itself from a file.</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv" title="Synopsis">
<a name="libbonobo-bonobo-persist-file.synopsis"></a><h2>Synopsis</h2>
<a name="BonoboPersistFile"></a><pre class="synopsis"> <a class="link" href="libbonobo-bonobo-persist-file.html#BonoboPersistFile-struct" title="BonoboPersistFile">BonoboPersistFile</a>;
<span class="returnvalue">int</span> (<a class="link" href="libbonobo-bonobo-persist-file.html#BonoboPersistFileIOFn" title="BonoboPersistFileIOFn ()">*BonoboPersistFileIOFn</a>) (<em class="parameter"><code><a class="link" href="libbonobo-bonobo-persist-file.html#BonoboPersistFile"><span class="type">BonoboPersistFile</span></a> *pf</code></em>,
<em class="parameter"><code>const <span class="type">CORBA_char</span> *uri</code></em>,
<em class="parameter"><code><span class="type">CORBA_Environment</span> *ev</code></em>,
<em class="parameter"><code><span class="type">void</span> *closure</code></em>);
<a class="link" href="libbonobo-bonobo-persist-file.html#BonoboPersistFileClass" title="BonoboPersistFileClass">BonoboPersistFileClass</a>;
<a class="link" href="libbonobo-bonobo-persist-file.html#BonoboPersistFile"><span class="returnvalue">BonoboPersistFile</span></a> * <a class="link" href="libbonobo-bonobo-persist-file.html#bonobo-persist-file-new" title="bonobo_persist_file_new ()">bonobo_persist_file_new</a> (<em class="parameter"><code><a class="link" href="libbonobo-bonobo-persist-file.html#BonoboPersistFileIOFn" title="BonoboPersistFileIOFn ()"><span class="type">BonoboPersistFileIOFn</span></a> load_fn</code></em>,
<em class="parameter"><code><a class="link" href="libbonobo-bonobo-persist-file.html#BonoboPersistFileIOFn" title="BonoboPersistFileIOFn ()"><span class="type">BonoboPersistFileIOFn</span></a> save_fn</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *iid</code></em>,
<em class="parameter"><code><span class="type">void</span> *closure</code></em>);
<a class="link" href="libbonobo-bonobo-persist-file.html#BonoboPersistFile"><span class="returnvalue">BonoboPersistFile</span></a> * <a class="link" href="libbonobo-bonobo-persist-file.html#bonobo-persist-file-construct" title="bonobo_persist_file_construct ()">bonobo_persist_file_construct</a> (<em class="parameter"><code><a class="link" href="libbonobo-bonobo-persist-file.html#BonoboPersistFile"><span class="type">BonoboPersistFile</span></a> *pf</code></em>,
<em class="parameter"><code><a class="link" href="libbonobo-bonobo-persist-file.html#BonoboPersistFileIOFn" title="BonoboPersistFileIOFn ()"><span class="type">BonoboPersistFileIOFn</span></a> load_fn</code></em>,
<em class="parameter"><code><a class="link" href="libbonobo-bonobo-persist-file.html#BonoboPersistFileIOFn" title="BonoboPersistFileIOFn ()"><span class="type">BonoboPersistFileIOFn</span></a> save_fn</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *iid</code></em>,
<em class="parameter"><code><span class="type">void</span> *closure</code></em>);
</pre>
</div>
<div class="refsect1" title="Object Hierarchy">
<a name="libbonobo-bonobo-persist-file.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>
+----<a class="link" href="libbonobo-bonobo-persist.html#BonoboPersist">BonoboPersist</a>
+----BonoboPersistFile
</pre>
</div>
<div class="refsect1" title="Description">
<a name="libbonobo-bonobo-persist-file.description"></a><h2>Description</h2>
<p>
The PersistFile interface is a useful interface for Bonoboizing
legacy applications, however, for new / correct applications it
is far preferable to implement the <a class="link" href="libbonobo-bonobo-persist-stream.html#BonoboPersistStream"><span class="type">BonoboPersistStream</span></a> interface,
since this will not only result in a nice clean to your application
architecture, but also allow the transparent use of local, remote,
and synthetic streams.
</p>
<p>
This interface works by connecting callbacks to the methods, in
a pretty deprecated fashion, it is probably better nowadays to
simply sub-class the BonoboXObject and override the epv methods.
Either way, after all the caveats here is an example use:
</p>
<div class="example">
<a name="id442991"></a><p class="title"><b>Example 25. Persist file implementation</b></p>
<div class="example-contents">
<table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
<tbody>
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<td class="listing_code"><pre class="programlisting"><span class="gtkdoc kwb">static</span> gint
<span class="function">load_from_file</span> <span class="symbol">(</span>BonoboPersistFile <span class="symbol">*</span>pf<span class="symbol">,</span>
<span class="gtkdoc kwb">const</span> CORBA_char <span class="symbol">*</span>filename<span class="symbol">,</span>
CORBA_Environment <span class="symbol">*</span>ev<span class="symbol">,</span>
<span class="gtkdoc kwb">void</span> <span class="symbol">*</span>closure<span class="symbol">)</span>
<span class="symbol">{</span>
EogImageData <span class="symbol">*</span>image_data <span class="symbol">=</span> closure<span class="symbol">;</span>
<span class="function"><a href="/usr/share/gtk-doc/html/glib/glib-Message-Logging.html#g-warning">g_warning</a></span> <span class="symbol">(</span><span class="string">"Load from '%s'"</span><span class="symbol">,</span> filename<span class="symbol">);</span>
<span class="keyword">return</span> <span class="number">0</span><span class="symbol">;</span> <span class="comment">/* Return 0 on success */</span>
<span class="symbol">}</span>
<span class="gtkdoc kwb">static</span> gint
<span class="function">save_to_file</span> <span class="symbol">(</span>BonoboPersistFile <span class="symbol">*</span>pf<span class="symbol">,</span>
<span class="gtkdoc kwb">const</span> CORBA_char <span class="symbol">*</span>filename<span class="symbol">,</span>
CORBA_Environment <span class="symbol">*</span>ev<span class="symbol">,</span>
<span class="gtkdoc kwb">void</span> <span class="symbol">*</span>closure<span class="symbol">)</span>
<span class="symbol">{</span>
EogImageData <span class="symbol">*</span>image_data <span class="symbol">=</span> closure<span class="symbol">;</span>
<span class="function"><a href="/usr/share/gtk-doc/html/glib/glib-Message-Logging.html#g-warning">g_warning</a></span> <span class="symbol">(</span><span class="string">"Save to '%s'"</span><span class="symbol">,</span> filename<span class="symbol">);</span>
<span class="keyword">return</span> <span class="number">0</span><span class="symbol">;</span> <span class="comment">/* Return 0 on success */</span>
<span class="symbol">}</span></pre></td>
</tr>
</tbody>
</table>
</div>
</div>
<p><br class="example-break">
Having implemented the callbacks we then have to register them
and aggregate the interface to our object:
</p>
<div class="example">
<a name="id443009"></a><p class="title"><b>Example 26. Aggregating a new PersistFile</b></p>
<div class="example-contents">
<table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td class="listing_lines" align="right"><pre>1
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<td class="listing_code"><pre class="programlisting">EogImageData <span class="symbol">*</span>
<span class="function">eog_image_data_construct</span> <span class="symbol">(</span>EogImageData <span class="symbol">*</span>image_data<span class="symbol">)</span>
<span class="symbol">{</span>
BonoboObject <span class="symbol">*</span>retval<span class="symbol">;</span>
BonoboPersistFile <span class="symbol">*</span>file<span class="symbol">;</span>
file <span class="symbol">=</span> <span class="function"><a href="libbonobo-bonobo-persist-file.html#bonobo-persist-file-new">bonobo_persist_file_new</a></span> <span class="symbol">(</span>
load_from_file<span class="symbol">,</span> save_to_file<span class="symbol">,</span> image_data<span class="symbol">);</span>
<span class="keyword">if</span> <span class="symbol">(</span>file <span class="symbol">==</span> NULL<span class="symbol">) {</span>
<span class="function"><a href="libbonobo-bonobo-object.html#bonobo-object-unref">bonobo_object_unref</a></span> <span class="symbol">(</span><span class="function">BONOBO_OBJECT</span> <span class="symbol">(</span>image_data<span class="symbol">));</span>
<span class="keyword">return</span> NULL<span class="symbol">;</span>
<span class="symbol">}</span>
<span class="function"><a href="libbonobo-bonobo-object.html#bonobo-object-add-interface">bonobo_object_add_interface</a></span> <span class="symbol">(</span><span class="function">BONOBO_OBJECT</span> <span class="symbol">(</span>image_data<span class="symbol">),</span>
<span class="function">BONOBO_OBJECT</span> <span class="symbol">(</span>file<span class="symbol">));</span>
<span class="keyword">return</span> image_data<span class="symbol">;</span>
<span class="symbol">}</span></pre></td>
</tr>
</tbody>
</table>
</div>
</div>
<p><br class="example-break">
Note again, that you should be writing a BonoboPersistStream
interface, however if you have already done this you might like
to just have hooks through so that old apps can use the PersistFile
interface:
</p>
<div class="example">
<a name="id443027"></a><p class="title"><b>Example 27. Chaining to a <span class="type">PersistStream</span> implementation</b></p>
<div class="example-contents">
<table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td class="listing_lines" align="right"><pre>1
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36</pre></td>
<td class="listing_code"><pre class="programlisting"><span class="gtkdoc kwb">static</span> gint
<span class="function">load_from_file</span> <span class="symbol">(</span>BonoboPersistFile <span class="symbol">*</span>pf<span class="symbol">,</span>
<span class="gtkdoc kwb">const</span> CORBA_char <span class="symbol">*</span>filename<span class="symbol">,</span>
CORBA_Environment <span class="symbol">*</span>ev<span class="symbol">,</span>
<span class="gtkdoc kwb">void</span> <span class="symbol">*</span>closure<span class="symbol">)</span>
<span class="symbol">{</span>
Bonobo_PersistStream ps <span class="symbol">=</span> closure<span class="symbol">;</span>
BonoboStream <span class="symbol">*</span>stream<span class="symbol">;</span>
stream <span class="symbol">=</span> <span class="function">bonobo_stream_open</span> <span class="symbol">(</span>
BONOBO_IO_DRIVER_FS<span class="symbol">,</span>
filename<span class="symbol">,</span> Bonobo_STORAGE_READ<span class="symbol">,</span>
<span class="number">0</span><span class="symbol">);</span>
<span class="keyword">if</span> <span class="symbol">(!</span>stream<span class="symbol">)</span>
<span class="keyword">return</span> <span class="number">0</span><span class="symbol">;</span>
<span class="symbol">..</span> extract content type from file <span class="symbol">...</span>
<span class="function">Bonobo_PersistStream_load</span> <span class="symbol">(</span>ps<span class="symbol">,</span> type<span class="symbol">,</span> ev<span class="symbol">);</span>
<span class="keyword">return</span> <span class="number">0</span><span class="symbol">;</span> <span class="comment">/* Return 0 on success */</span>
<span class="symbol">}</span>
<span class="gtkdoc kwb">static</span> gint
<span class="function">save_to_file</span> <span class="symbol">(</span>BonoboPersistFile <span class="symbol">*</span>pf<span class="symbol">,</span>
<span class="gtkdoc kwb">const</span> CORBA_char <span class="symbol">*</span>filename<span class="symbol">,</span>
CORBA_Environment <span class="symbol">*</span>ev<span class="symbol">,</span>
<span class="gtkdoc kwb">void</span> <span class="symbol">*</span>closure<span class="symbol">)</span>
<span class="symbol">{</span>
Bonobo_PersistStream ps <span class="symbol">=</span> closure<span class="symbol">;</span>
BonoboStream <span class="symbol">*</span>stream<span class="symbol">;</span>
stream <span class="symbol">=</span> <span class="function">bonobo_stream_open</span> <span class="symbol">(</span>
BONOBO_IO_DRIVER_FS<span class="symbol">,</span>
filename<span class="symbol">,</span> Bonobo_STORAGE_WRITE <span class="symbol">|</span> Bonobo_STORAGE_CREATE<span class="symbol">,</span>
S_IRUSR <span class="symbol">|</span> S_IWUSR <span class="symbol">|</span> S_IRGRP<span class="symbol">);</span>
<span class="keyword">if</span> <span class="symbol">(!</span>stream<span class="symbol">)</span>
<span class="keyword">return</span> <span class="number">0</span><span class="symbol">;</span>
<span class="symbol">..</span> work out content type we want to save <span class="symbol">...</span>
<span class="function">Bonobo_PersistStream_save</span> <span class="symbol">(</span>ps<span class="symbol">,</span> type<span class="symbol">,</span> ev<span class="symbol">);</span>
<span class="keyword">return</span> <span class="number">0</span><span class="symbol">;</span> <span class="comment">/* Return 0 on success */</span>
<span class="symbol">}</span></pre></td>
</tr>
</tbody>
</table>
</div>
</div>
<p><br class="example-break">
The mime type data can be extracted from gnome-vfs or gnome-mime.
</p>
</div>
<div class="refsect1" title="Details">
<a name="libbonobo-bonobo-persist-file.details"></a><h2>Details</h2>
<div class="refsect2" title="BonoboPersistFile">
<a name="BonoboPersistFile-struct"></a><h3>BonoboPersistFile</h3>
<pre class="programlisting">typedef struct _BonoboPersistFile BonoboPersistFile;</pre>
<div class="warning" title="Warning" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Warning</h3>
<p><code class="literal">BonoboPersistFile</code> is deprecated and should not be used in newly-written code.</p>
</div>
<p>
</p>
</div>
<hr>
<div class="refsect2" title="BonoboPersistFileIOFn ()">
<a name="BonoboPersistFileIOFn"></a><h3>BonoboPersistFileIOFn ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> (*BonoboPersistFileIOFn) (<em class="parameter"><code><a class="link" href="libbonobo-bonobo-persist-file.html#BonoboPersistFile"><span class="type">BonoboPersistFile</span></a> *pf</code></em>,
<em class="parameter"><code>const <span class="type">CORBA_char</span> *uri</code></em>,
<em class="parameter"><code><span class="type">CORBA_Environment</span> *ev</code></em>,
<em class="parameter"><code><span class="type">void</span> *closure</code></em>);</pre>
<div class="warning" title="Warning" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Warning</h3>
<p><code class="literal">BonoboPersistFileIOFn</code> is deprecated and should not be used in newly-written code.</p>
</div>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>pf</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>uri</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>ev</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>closure</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="BonoboPersistFileClass">
<a name="BonoboPersistFileClass"></a><h3>BonoboPersistFileClass</h3>
<pre class="programlisting">typedef struct {
BonoboPersistClass parent_class;
POA_Bonobo_PersistFile__epv epv;
/* methods */
int (*load) (BonoboPersistFile *ps,
const CORBA_char *uri,
CORBA_Environment *ev);
int (*save) (BonoboPersistFile *ps,
const CORBA_char *uri,
CORBA_Environment *ev);
char *(*get_current_file) (BonoboPersistFile *ps,
CORBA_Environment *ev);
} BonoboPersistFileClass;
</pre>
<div class="warning" title="Warning" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Warning</h3>
<p><code class="literal">BonoboPersistFileClass</code> is deprecated and should not be used in newly-written code.</p>
</div>
<p>
</p>
</div>
<hr>
<div class="refsect2" title="bonobo_persist_file_new ()">
<a name="bonobo-persist-file-new"></a><h3>bonobo_persist_file_new ()</h3>
<pre class="programlisting"><a class="link" href="libbonobo-bonobo-persist-file.html#BonoboPersistFile"><span class="returnvalue">BonoboPersistFile</span></a> * bonobo_persist_file_new (<em class="parameter"><code><a class="link" href="libbonobo-bonobo-persist-file.html#BonoboPersistFileIOFn" title="BonoboPersistFileIOFn ()"><span class="type">BonoboPersistFileIOFn</span></a> load_fn</code></em>,
<em class="parameter"><code><a class="link" href="libbonobo-bonobo-persist-file.html#BonoboPersistFileIOFn" title="BonoboPersistFileIOFn ()"><span class="type">BonoboPersistFileIOFn</span></a> save_fn</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *iid</code></em>,
<em class="parameter"><code><span class="type">void</span> *closure</code></em>);</pre>
<div class="warning" title="Warning" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Warning</h3>
<p><code class="literal">bonobo_persist_file_new</code> is deprecated and should not be used in newly-written code.</p>
</div>
<p>
Creates a BonoboPersistFile object. The <em class="parameter"><code>load_fn</code></em> and <em class="parameter"><code>save_fn</code></em>
parameters might be NULL. If this is the case, the load and save
operations are performed by the class load and save methods
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>load_fn</code></em> :</span></p></td>
<td>Loading routine
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>save_fn</code></em> :</span></p></td>
<td>Saving routine
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>iid</code></em> :</span></p></td>
<td>OAF IID of the object this interface is aggregated to
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>closure</code></em> :</span></p></td>
<td>Data passed to IO routines.
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> the <a class="link" href="libbonobo-bonobo-persist-file.html#BonoboPersistFile"><span class="type">BonoboPersistFile</span></a>.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="bonobo_persist_file_construct ()">
<a name="bonobo-persist-file-construct"></a><h3>bonobo_persist_file_construct ()</h3>
<pre class="programlisting"><a class="link" href="libbonobo-bonobo-persist-file.html#BonoboPersistFile"><span class="returnvalue">BonoboPersistFile</span></a> * bonobo_persist_file_construct (<em class="parameter"><code><a class="link" href="libbonobo-bonobo-persist-file.html#BonoboPersistFile"><span class="type">BonoboPersistFile</span></a> *pf</code></em>,
<em class="parameter"><code><a class="link" href="libbonobo-bonobo-persist-file.html#BonoboPersistFileIOFn" title="BonoboPersistFileIOFn ()"><span class="type">BonoboPersistFileIOFn</span></a> load_fn</code></em>,
<em class="parameter"><code><a class="link" href="libbonobo-bonobo-persist-file.html#BonoboPersistFileIOFn" title="BonoboPersistFileIOFn ()"><span class="type">BonoboPersistFileIOFn</span></a> save_fn</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *iid</code></em>,
<em class="parameter"><code><span class="type">void</span> *closure</code></em>);</pre>
<div class="warning" title="Warning" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Warning</h3>
<p><code class="literal">bonobo_persist_file_construct</code> is deprecated and should not be used in newly-written code.</p>
</div>
<p>
Initializes the BonoboPersistFile object. The <em class="parameter"><code>load_fn</code></em> and <em class="parameter"><code>save_fn</code></em>
parameters might be NULL. If this is the case, the load and save
operations are performed by the class load and save methods
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>pf</code></em> :</span></p></td>
<td>A BonoboPersistFile
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>load_fn</code></em> :</span></p></td>
<td>Loading routine
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>save_fn</code></em> :</span></p></td>
<td>Saving routine
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>iid</code></em> :</span></p></td>
<td>OAF IID of the object this interface is aggregated to
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>closure</code></em> :</span></p></td>
<td>Data passed to IO routines.
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> the <a class="link" href="libbonobo-bonobo-persist-file.html#BonoboPersistFile"><span class="type">BonoboPersistFile</span></a>.
</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1" title="See Also">
<a name="libbonobo-bonobo-persist-file.see-also"></a><h2>See Also</h2>
<p>
<a class="link" href="libbonobo-bonobo-persist-stream.html#BonoboPersistStream"><span class="type">BonoboPersistStream</span></a>, <a class="link" href="libbonobo-bonobo-persist.html#BonoboPersist"><span class="type">BonoboPersist</span></a>
</p>
</div>
</div>
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