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<a href="#GwyDataChooser.description" class="shortcut">Description</a>
|
<a href="#GwyDataChooser.object-hierarchy" class="shortcut">Object Hierarchy</a>
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<a href="#GwyDataChooser.implemented-interfaces" class="shortcut">Implemented Interfaces</a>
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<div class="refentry">
<a name="GwyDataChooser"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="GwyDataChooser.top_of_page"></a>GwyDataChooser</span></h2>
<p>GwyDataChooser — Data object choosers</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="GwyDataChooser.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include <app/gwyapp.h>
<a class="link" href="GwyDataChooser.html#GwyDataChooser-struct" title="GwyDataChooser">GwyDataChooser</a>;
<a class="link" href="GwyDataChooser.html#GwyDataChooserClass" title="GwyDataChooserClass">GwyDataChooserClass</a>;
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> (<a class="link" href="GwyDataChooser.html#GwyDataChooserFilterFunc" title="GwyDataChooserFilterFunc ()">*GwyDataChooserFilterFunc</a>) (<em class="parameter"><code><a href="./../libgwyddion/libgwyddion/GwyContainer.html"><span class="type">GwyContainer</span></a> *data</code></em>,
<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> id</code></em>,
<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);
<a href="./../libgwyddion/libgwyddion/GwyContainer.html"><span class="returnvalue">GwyContainer</span></a> * <a class="link" href="GwyDataChooser.html#gwy-data-chooser-get-active" title="gwy_data_chooser_get_active ()">gwy_data_chooser_get_active</a> (<em class="parameter"><code><a class="link" href="GwyDataChooser.html" title="GwyDataChooser"><span class="type">GwyDataChooser</span></a> *chooser</code></em>,
<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *id</code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/gtk/GtkTreeModel.html"><span class="returnvalue">GtkTreeModel</span></a> * <a class="link" href="GwyDataChooser.html#gwy-data-chooser-get-filter" title="gwy_data_chooser_get_filter ()">gwy_data_chooser_get_filter</a> (<em class="parameter"><code><a class="link" href="GwyDataChooser.html" title="GwyDataChooser"><span class="type">GwyDataChooser</span></a> *chooser</code></em>);
const <a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * <a class="link" href="GwyDataChooser.html#gwy-data-chooser-get-none" title="gwy_data_chooser_get_none ()">gwy_data_chooser_get_none</a> (<em class="parameter"><code><a class="link" href="GwyDataChooser.html" title="GwyDataChooser"><span class="type">GwyDataChooser</span></a> *chooser</code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/gtk/GtkWidget.html"><span class="returnvalue">GtkWidget</span></a> * <a class="link" href="GwyDataChooser.html#gwy-data-chooser-new-channels" title="gwy_data_chooser_new_channels ()">gwy_data_chooser_new_channels</a> (<em class="parameter"><code><span class="type">void</span></code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="GwyDataChooser.html#gwy-data-chooser-set-active" title="gwy_data_chooser_set_active ()">gwy_data_chooser_set_active</a> (<em class="parameter"><code><a class="link" href="GwyDataChooser.html" title="GwyDataChooser"><span class="type">GwyDataChooser</span></a> *chooser</code></em>,
<em class="parameter"><code><a href="./../libgwyddion/libgwyddion/GwyContainer.html"><span class="type">GwyContainer</span></a> *data</code></em>,
<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> id</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GwyDataChooser.html#gwy-data-chooser-set-filter" title="gwy_data_chooser_set_filter ()">gwy_data_chooser_set_filter</a> (<em class="parameter"><code><a class="link" href="GwyDataChooser.html" title="GwyDataChooser"><span class="type">GwyDataChooser</span></a> *chooser</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataChooser.html#GwyDataChooserFilterFunc" title="GwyDataChooserFilterFunc ()"><span class="type">GwyDataChooserFilterFunc</span></a> filter</code></em>,
<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/gtk/gtk-Types.html#GtkDestroyNotify"><span class="type">GtkDestroyNotify</span></a> destroy</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GwyDataChooser.html#gwy-data-chooser-set-none" title="gwy_data_chooser_set_none ()">gwy_data_chooser_set_none</a> (<em class="parameter"><code><a class="link" href="GwyDataChooser.html" title="GwyDataChooser"><span class="type">GwyDataChooser</span></a> *chooser</code></em>,
<em class="parameter"><code>const <a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *none</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="GwyDataChooser.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
<a href="http://developer.gnome.org/doc/API/2.0/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a>
+----<a href="http://developer.gnome.org/doc/API/2.0/gobject/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a>
+----<a href="http://developer.gnome.org/doc/API/2.0/gtk/GtkObject.html">GtkObject</a>
+----<a href="http://developer.gnome.org/doc/API/2.0/gtk/GtkWidget.html">GtkWidget</a>
+----<a href="/usr/share/gtk-doc/html/gtk/GtkContainer.html">GtkContainer</a>
+----<a href="/usr/share/gtk-doc/html/gtk/GtkBin.html">GtkBin</a>
+----<a href="/usr/share/gtk-doc/html/gtk/GtkComboBox.html">GtkComboBox</a>
+----GwyDataChooser
</pre>
</div>
<div class="refsect1">
<a name="GwyDataChooser.implemented-interfaces"></a><h2>Implemented Interfaces</h2>
<p>
GwyDataChooser implements
AtkImplementorIface, <a href="/usr/share/gtk-doc/html/gtk/GtkBuildable.html">GtkBuildable</a>, <a href="/usr/share/gtk-doc/html/gtk/GtkCellLayout.html">GtkCellLayout</a> and <a href="/usr/share/gtk-doc/html/gtk/GtkCellEditable.html">GtkCellEditable</a>.</p>
</div>
<div class="refsect1">
<a name="GwyDataChooser.description"></a><h2>Description</h2>
<p>
<a class="link" href="GwyDataChooser.html" title="GwyDataChooser"><span class="type">GwyDataChooser</span></a> is an base data object chooser class. Choosers for
particular data objects can be created with functions like
<a class="link" href="GwyDataChooser.html#gwy-data-chooser-new-channels" title="gwy_data_chooser_new_channels ()"><code class="function">gwy_data_chooser_new_channels()</code></a> and then manipulated through
<a class="link" href="GwyDataChooser.html" title="GwyDataChooser"><span class="type">GwyDataChooser</span></a> interface.
</p>
<p>
The widget type used to implement choosers is not a part of the interface
and may be subject of future changes. In any case <a class="link" href="GwyDataChooser.html" title="GwyDataChooser"><span class="type">GwyDataChooser</span></a> has
a <code class="code">"changed"</code> signal emitted when the selected item changes.
</p>
<p>
It is possible to offer only data objects matching some criteria. For
example to offer only data fields compatible with another data field,
one can use:
</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</pre></td>
<td class="listing_code"><pre class="programlisting"><span class="usertype">GtkWidget</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">chooser</span><span class="symbol">;</span>
<span class="usertype">GwyDataField</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">model</span><span class="symbol">;</span>
<span class="normal">model </span><span class="symbol">=</span><span class="normal"> </span><span class="symbol">...;</span>
<span class="normal">chooser </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="#gwy-data-chooser-new-channels">gwy_data_chooser_new_channels</a></span><span class="symbol">();</span>
<span class="function"><a href="#gwy-data-chooser-set-filter">gwy_data_chooser_set_filter</a></span><span class="symbol">(</span><span class="function">GWY_DATA_CHOOSER</span><span class="symbol">(</span><span class="normal">chooser</span><span class="symbol">),</span>
<span class="normal"> compatible_field_filter</span><span class="symbol">,</span><span class="normal"> model</span><span class="symbol">,</span>
<span class="normal"> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">);</span></pre></td>
</tr>
</tbody>
</table>
</div>
<p>
where the filter function looks like
</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
13
14
15
16
17
18</pre></td>
<td class="listing_code"><pre class="programlisting"><span class="keyword">static</span><span class="normal"> <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean">gboolean</a></span>
<span class="function">compatible_field_filter</span><span class="symbol">(</span><span class="usertype">GwyContainer</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">data</span><span class="symbol">,</span>
<span class="normal"> </span><span class="usertype">gint</span><span class="normal"> id</span><span class="symbol">,</span>
<span class="normal"> </span><span class="usertype">gpointer</span><span class="normal"> user_data</span><span class="symbol">)</span>
<span class="cbracket">{</span>
<span class="normal"> </span><span class="usertype">GwyDataField</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">model</span><span class="symbol">,</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">data_field</span><span class="symbol">;</span>
<span class="normal"> </span><span class="usertype">GQuark</span><span class="normal"> quark</span><span class="symbol">;</span>
<span class="normal"> </span>
<span class="normal"> quark </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="libgwyapp-data-browser.html#gwy-app-get-data-key-for-id">gwy_app_get_data_key_for_id</a></span><span class="symbol">(</span><span class="normal">id</span><span class="symbol">);</span>
<span class="normal"> data_field </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="./../libgwyddion/libgwyddion/GwyContainer.html#gwy-container-get-object">gwy_container_get_object</a></span><span class="symbol">(</span><span class="normal">data</span><span class="symbol">,</span><span class="normal"> quark</span><span class="symbol">);</span>
<span class="normal"> model </span><span class="symbol">=</span><span class="normal"> </span><span class="function">GWY_DATA_FIELD</span><span class="symbol">(</span><span class="normal">user_data</span><span class="symbol">);</span>
<span class="normal"> </span><span class="keyword">return</span><span class="normal"> </span><span class="symbol">!</span><span class="normal"><a href="./../libgwyprocess/libgwyprocess/libgwyprocess-arithmetic.html#gwy-data-field-check-compatibility">gwy_data_field_check_compatibility</a></span>
<span class="normal"> </span><span class="symbol">(</span><span class="normal">data_field</span><span class="symbol">,</span><span class="normal"> model</span><span class="symbol">,</span>
<span class="normal"> <a href="./../libgwyprocess/libgwyprocess/libgwyprocess-gwyprocessenums.html#GWY-DATA-COMPATIBILITY-RES:CAPS">GWY_DATA_COMPATIBILITY_RES</a></span>
<span class="normal"> </span><span class="symbol">|</span><span class="normal"> <a href="./../libgwyprocess/libgwyprocess/libgwyprocess-gwyprocessenums.html#GWY-DATA-COMPATIBILITY-REAL:CAPS">GWY_DATA_COMPATIBILITY_REAL</a></span>
<span class="normal"> </span><span class="symbol">|</span><span class="normal"> <a href="./../libgwyprocess/libgwyprocess/libgwyprocess-gwyprocessenums.html#GWY-DATA-COMPATIBILITY-LATERAL:CAPS">GWY_DATA_COMPATIBILITY_LATERAL</a></span>
<span class="normal"> </span><span class="symbol">|</span><span class="normal"> <a href="./../libgwyprocess/libgwyprocess/libgwyprocess-gwyprocessenums.html#GWY-DATA-COMPATIBILITY-VALUE:CAPS">GWY_DATA_COMPATIBILITY_VALUE</a></span><span class="symbol">);</span>
<span class="cbracket">}</span></pre></td>
</tr>
</tbody>
</table>
</div>
<p>
</p>
</div>
<div class="refsect1">
<a name="GwyDataChooser.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GwyDataChooser-struct"></a><h3>GwyDataChooser</h3>
<pre class="programlisting">typedef struct _GwyDataChooser GwyDataChooser;</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GwyDataChooserClass"></a><h3>GwyDataChooserClass</h3>
<pre class="programlisting">typedef struct _GwyDataChooserClass GwyDataChooserClass;</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GwyDataChooserFilterFunc"></a><h3>GwyDataChooserFilterFunc ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> (*GwyDataChooserFilterFunc) (<em class="parameter"><code><a href="./../libgwyddion/libgwyddion/GwyContainer.html"><span class="type">GwyContainer</span></a> *data</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> id</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>
The type of data chooser filter function.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td>
<td>Data container.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>id</code></em> :</span></p></td>
<td>Id of particular data in <em class="parameter"><code>data</code></em>.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>Data passed to <a class="link" href="GwyDataChooser.html#gwy-data-chooser-set-filter" title="gwy_data_chooser_set_filter ()"><code class="function">gwy_data_chooser_set_filter()</code></a>.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> to display this data in the chooser, <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> to omit it.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-chooser-get-active"></a><h3>gwy_data_chooser_get_active ()</h3>
<pre class="programlisting"><a href="./../libgwyddion/libgwyddion/GwyContainer.html"><span class="returnvalue">GwyContainer</span></a> * gwy_data_chooser_get_active (<em class="parameter"><code><a class="link" href="GwyDataChooser.html" title="GwyDataChooser"><span class="type">GwyDataChooser</span></a> *chooser</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *id</code></em>);</pre>
<p>
Gets the selected item in a data chooser.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>chooser</code></em> :</span></p></td>
<td>A data chooser.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>id</code></em> :</span></p></td>
<td>Location to store selected data id to (may be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>).</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The container selected data lies in, <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if nothing is selected
or `none' item is selected.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-chooser-get-filter"></a><h3>gwy_data_chooser_get_filter ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gtk/GtkTreeModel.html"><span class="returnvalue">GtkTreeModel</span></a> * gwy_data_chooser_get_filter (<em class="parameter"><code><a class="link" href="GwyDataChooser.html" title="GwyDataChooser"><span class="type">GwyDataChooser</span></a> *chooser</code></em>);</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-chooser-get-none"></a><h3>gwy_data_chooser_get_none ()</h3>
<pre class="programlisting">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * gwy_data_chooser_get_none (<em class="parameter"><code><a class="link" href="GwyDataChooser.html" title="GwyDataChooser"><span class="type">GwyDataChooser</span></a> *chooser</code></em>);</pre>
<p>
Gets the label of the item corresponding to no data.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>chooser</code></em> :</span></p></td>
<td>A data chooser.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The label corresponding to no data, an empty string for the default
label and <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if the chooser does not display `none' item.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-chooser-new-channels"></a><h3>gwy_data_chooser_new_channels ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gtk/GtkWidget.html"><span class="returnvalue">GtkWidget</span></a> * gwy_data_chooser_new_channels (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Creates a data chooser for data channels.
</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>A new channel chooser. Nothing may be assumed about the type and
properties of the returned widget as they can change in the future.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-chooser-set-active"></a><h3>gwy_data_chooser_set_active ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gwy_data_chooser_set_active (<em class="parameter"><code><a class="link" href="GwyDataChooser.html" title="GwyDataChooser"><span class="type">GwyDataChooser</span></a> *chooser</code></em>,
<em class="parameter"><code><a href="./../libgwyddion/libgwyddion/GwyContainer.html"><span class="type">GwyContainer</span></a> *data</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> id</code></em>);</pre>
<p>
Selects a data in a data chooser.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>chooser</code></em> :</span></p></td>
<td>A data chooser.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td>
<td>Container to select, <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> to select none (if the chooser contains
`none' item).</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>id</code></em> :</span></p></td>
<td>Id of particular data to select in <em class="parameter"><code>data</code></em>.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if selected item was set.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-chooser-set-filter"></a><h3>gwy_data_chooser_set_filter ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_data_chooser_set_filter (<em class="parameter"><code><a class="link" href="GwyDataChooser.html" title="GwyDataChooser"><span class="type">GwyDataChooser</span></a> *chooser</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataChooser.html#GwyDataChooserFilterFunc" title="GwyDataChooserFilterFunc ()"><span class="type">GwyDataChooserFilterFunc</span></a> filter</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>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gtk/gtk-Types.html#GtkDestroyNotify"><span class="type">GtkDestroyNotify</span></a> destroy</code></em>);</pre>
<p>
Sets the filter applied to a data chooser.
</p>
<p>
The display of an item corresponding to no data is controlled by
<a class="link" href="GwyDataChooser.html#gwy-data-chooser-set-none" title="gwy_data_chooser_set_none ()"><code class="function">gwy_data_chooser_set_none()</code></a>, <em class="parameter"><code>filter</code></em> function is only called for real data.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>chooser</code></em> :</span></p></td>
<td>A data chooser.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>filter</code></em> :</span></p></td>
<td>The filter function.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>The data passed to <em class="parameter"><code>filter</code></em>.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>destroy</code></em> :</span></p></td>
<td>Destroy notifier of <em class="parameter"><code>user_data</code></em> or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-chooser-set-none"></a><h3>gwy_data_chooser_set_none ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_data_chooser_set_none (<em class="parameter"><code><a class="link" href="GwyDataChooser.html" title="GwyDataChooser"><span class="type">GwyDataChooser</span></a> *chooser</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> *none</code></em>);</pre>
<p>
Sets the label of the item corresponding to no data.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>chooser</code></em> :</span></p></td>
<td>A data chooser.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>none</code></em> :</span></p></td>
<td>Label to use for item corresponding to no data. Passing <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>,
disables such an item, an empty string enables it with
the default label.</td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
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