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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>Gwyddion Widgets Library Reference Manual: gwygrainvaluemenu</title>
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<div class="refentry">
<a name="libgwydgets-gwygrainvaluemenu"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="libgwydgets-gwygrainvaluemenu.top_of_page"></a>gwygrainvaluemenu</span></h2>
<p>gwygrainvaluemenu — Grain value display/selector</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="libgwydgets-gwygrainvaluemenu.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include &lt;libgwydgets/gwydgets.h&gt;

enum                <a class="link" href="libgwydgets-gwygrainvaluemenu.html#GwyGrainValueStoreColumn" title="enum GwyGrainValueStoreColumn">GwyGrainValueStoreColumn</a>;
<a href="http://developer.gnome.org/doc/API/2.0/gtk/GtkWidget.html"><span class="returnvalue">GtkWidget</span></a> *         <a class="link" href="libgwydgets-gwygrainvaluemenu.html#gwy-grain-value-tree-view-new" title="gwy_grain_value_tree_view_new ()">gwy_grain_value_tree_view_new</a>       (<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> show_id</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> *first_column</code></em>,
                                                         <em class="parameter"><code>...</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="libgwydgets-gwygrainvaluemenu.html#gwy-grain-value-tree-view-set-expanded-groups" title="gwy_grain_value_tree_view_set_expanded_groups ()">gwy_grain_value_tree_view_set_expanded_groups</a>
                                                        (<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/gtk/GtkTreeView.html"><span class="type">GtkTreeView</span></a> *treeview</code></em>,
                                                         <em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> expanded_bits</code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>               <a class="link" href="libgwydgets-gwygrainvaluemenu.html#gwy-grain-value-tree-view-get-expanded-groups" title="gwy_grain_value_tree_view_get_expanded_groups ()">gwy_grain_value_tree_view_get_expanded_groups</a>
                                                        (<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/gtk/GtkTreeView.html"><span class="type">GtkTreeView</span></a> *treeview</code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a>                <a class="link" href="libgwydgets-gwygrainvaluemenu.html#gwy-grain-value-tree-view-n-enabled" title="gwy_grain_value_tree_view_n_enabled ()">gwy_grain_value_tree_view_n_enabled</a> (<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/gtk/GtkTreeView.html"><span class="type">GtkTreeView</span></a> *treeview</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="libgwydgets-gwygrainvaluemenu.html#gwy-grain-value-tree-view-get-enabled" title="gwy_grain_value_tree_view_get_enabled ()">gwy_grain_value_tree_view_get_enabled</a>
                                                        (<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/gtk/GtkTreeView.html"><span class="type">GtkTreeView</span></a> *treeview</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="libgwydgets-gwygrainvaluemenu.html#gwy-grain-value-tree-view-set-enabled" title="gwy_grain_value_tree_view_set_enabled ()">gwy_grain_value_tree_view_set_enabled</a>
                                                        (<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/gtk/GtkTreeView.html"><span class="type">GtkTreeView</span></a> *treeview</code></em>,
                                                         <em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> **names</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="libgwydgets-gwygrainvaluemenu.html#gwy-grain-value-tree-view-select" title="gwy_grain_value_tree_view_select ()">gwy_grain_value_tree_view_select</a>    (<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/gtk/GtkTreeView.html"><span class="type">GtkTreeView</span></a> *treeview</code></em>,
                                                         <em class="parameter"><code><a href="../libgwyprocess/GwyGrainValue.html"><span class="type">GwyGrainValue</span></a> *gvalue</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="libgwydgets-gwygrainvaluemenu.html#gwy-grain-value-tree-view-set-same-units" title="gwy_grain_value_tree_view_set_same_units ()">gwy_grain_value_tree_view_set_same_units</a>
                                                        (<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/gtk/GtkTreeView.html"><span class="type">GtkTreeView</span></a> *treeview</code></em>,
                                                         <em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> same_units</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="libgwydgets-gwygrainvaluemenu.description"></a><h2>Description</h2>
</div>
<div class="refsect1">
<a name="libgwydgets-gwygrainvaluemenu.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GwyGrainValueStoreColumn"></a><h3>enum GwyGrainValueStoreColumn</h3>
<pre class="programlisting">typedef enum {
    GWY_GRAIN_VALUE_STORE_COLUMN_ITEM,
    GWY_GRAIN_VALUE_STORE_COLUMN_GROUP,
    GWY_GRAIN_VALUE_STORE_COLUMN_ENABLED
} GwyGrainValueStoreColumn;
</pre>
<p>
Columns of the grain value tree view <a href="/usr/share/gtk-doc/html/gtk3/GtkTreeStore.html"><span class="type">GtkTreeStore</span></a> model.
</p>
<p>
It must not be assumed these are the only columns in the tree store.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><a name="GWY-GRAIN-VALUE-STORE-COLUMN-ITEM:CAPS"></a><span class="term"><code class="literal">GWY_GRAIN_VALUE_STORE_COLUMN_ITEM</code></span></p></td>
<td>Grain value itself (<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> for
                                    non-leaves), the column type is
                                    <a href="../libgwyprocess/GwyGrainValue.html"><span class="type">GwyGrainValue</span></a>.
</td>
</tr>
<tr>
<td><p><a name="GWY-GRAIN-VALUE-STORE-COLUMN-GROUP:CAPS"></a><span class="term"><code class="literal">GWY_GRAIN_VALUE_STORE_COLUMN_GROUP</code></span></p></td>
<td>Grain value group, useful namely for
                                     non-leaves (identical to the value
                                     group for leaves), the column type is
                                     <a href="../libgwyprocess/GwyGrainValue.html#GwyGrainValueGroup"><span class="type">GwyGrainValueGroup</span></a>.
</td>
</tr>
<tr>
<td><p><a name="GWY-GRAIN-VALUE-STORE-COLUMN-ENABLED:CAPS"></a><span class="term"><code class="literal">GWY_GRAIN_VALUE_STORE_COLUMN_ENABLED</code></span></p></td>
<td>Enabled/disabled state (meaning is
                                       undefined for non-leaves and
                                       reserved for future use), the column
                                       type is <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a>.
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.8</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-grain-value-tree-view-new"></a><h3>gwy_grain_value_tree_view_new ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gtk3/GtkWidget.html"><span class="returnvalue">GtkWidget</span></a> *         gwy_grain_value_tree_view_new       (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> show_id</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> *first_column</code></em>,
                                                         <em class="parameter"><code>...</code></em>);</pre>
<p>
Creates a new tree view selector of grain values.
</p>
<p>
Possible column names are <code class="literal">"name"</code> for the grain value
name, <code class="literal">"symbol_markup"</code> for the rich text symbol,
<code class="literal">"symbol"</code> for identifier-style symbol and
<code class="literal">"enabled"</code> for a checkbox column.
</p>
<p>
The tree view selection is set to <a href="/usr/share/gtk-doc/html/gtk3/gtk3-Standard-Enumerations.html#GTK-SELECTION-BROWSE:CAPS"><code class="literal">GTK_SELECTION_BROWSE</code></a> mode and it is
allowed only on leaves.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>show_id</code></em> :</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 include grain id number among the values, <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> to
exclude it.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>first_column</code></em> :</span></p></td>
<td>The first column to show (may be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> for no columns).</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>...</code></em> :</span></p></td>
<td>
<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>-terminated list of columns to show.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>A new tree view with grain values.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.8</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-grain-value-tree-view-set-expanded-groups"></a><h3>gwy_grain_value_tree_view_set_expanded_groups ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_grain_value_tree_view_set_expanded_groups
                                                        (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gtk3/GtkTreeView.html"><span class="type">GtkTreeView</span></a> *treeview</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> expanded_bits</code></em>);</pre>
<p>
Restores a grain value tree view group expansion state.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>treeview</code></em> :</span></p></td>
<td>A tree view with grain values.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>expanded_bits</code></em> :</span></p></td>
<td>Integer with bits of <a href="../libgwyprocess/GwyGrainValue.html#GwyGrainValueGroup"><span class="type">GwyGrainValueGroup</span></a> set if the
corresponding group should be expanded.  Typically this
is either zero or a value previously obtained from
<a class="link" href="libgwydgets-gwygrainvaluemenu.html#gwy-grain-value-tree-view-get-expanded-groups" title="gwy_grain_value_tree_view_get_expanded_groups ()"><code class="function">gwy_grain_value_tree_view_get_expanded_groups()</code></a>.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.8</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-grain-value-tree-view-get-expanded-groups"></a><h3>gwy_grain_value_tree_view_get_expanded_groups ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>               gwy_grain_value_tree_view_get_expanded_groups
                                                        (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gtk3/GtkTreeView.html"><span class="type">GtkTreeView</span></a> *treeview</code></em>);</pre>
<p>
Obtains the group expansion state of a grain value tree view.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>treeview</code></em> :</span></p></td>
<td>A tree view with grain values.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The expansion state, see
<a class="link" href="libgwydgets-gwygrainvaluemenu.html#gwy-grain-value-tree-view-set-expanded-groups" title="gwy_grain_value_tree_view_set_expanded_groups ()"><code class="function">gwy_grain_value_tree_view_set_expanded_groups()</code></a> for details.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.8</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-grain-value-tree-view-n-enabled"></a><h3>gwy_grain_value_tree_view_n_enabled ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a>                gwy_grain_value_tree_view_n_enabled (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gtk3/GtkTreeView.html"><span class="type">GtkTreeView</span></a> *treeview</code></em>);</pre>
<p>
Gets the number of enabled values in a grain value tree view.
</p>
<p>
Enabled values are those with <a class="link" href="libgwydgets-gwygrainvaluemenu.html#GWY-GRAIN-VALUE-STORE-COLUMN-ENABLED:CAPS"><code class="literal">GWY_GRAIN_VALUE_STORE_COLUMN_ENABLED</code></a> column
set to <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> in the model.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>treeview</code></em> :</span></p></td>
<td>A tree view with grain values.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The number of enabled values.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.8</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-grain-value-tree-view-get-enabled"></a><h3>gwy_grain_value_tree_view_get_enabled ()</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_grain_value_tree_view_get_enabled
                                                        (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gtk3/GtkTreeView.html"><span class="type">GtkTreeView</span></a> *treeview</code></em>);</pre>
<p>
Obtains the list of enabled values in a grain value tree view.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>treeview</code></em> :</span></p></td>
<td>A tree view with grain values.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The list of grain value names.  The list must be freed by the
caller, the strings are however owned by the individual grain
values and must not be freed.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.8</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-grain-value-tree-view-set-enabled"></a><h3>gwy_grain_value_tree_view_set_enabled ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_grain_value_tree_view_set_enabled
                                                        (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gtk3/GtkTreeView.html"><span class="type">GtkTreeView</span></a> *treeview</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> **names</code></em>);</pre>
<p>
Sets the set of enabled values in a grain value tree view.
</p>
<p>
The tree is possibly expanded so that all enabled values are visible.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>treeview</code></em> :</span></p></td>
<td>A tree view with grain values.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>names</code></em> :</span></p></td>
<td>Array of grain value names to enables.  All grain values not present
here are disabled.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.8</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-grain-value-tree-view-select"></a><h3>gwy_grain_value_tree_view_select ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_grain_value_tree_view_select    (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gtk3/GtkTreeView.html"><span class="type">GtkTreeView</span></a> *treeview</code></em>,
                                                         <em class="parameter"><code><a href="../libgwyprocess/GwyGrainValue.html"><span class="type">GwyGrainValue</span></a> *gvalue</code></em>);</pre>
<p>
Selects a particular grain value in a grain value tree view.
</p>
<p>
If the <em class="parameter"><code>gvalue</code></em> group is currently unexpanded, it will be expanded to
show it, and the tree view may scroll to make it visible.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>treeview</code></em> :</span></p></td>
<td>A tree view with grain values.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gvalue</code></em> :</span></p></td>
<td>The grain value to select.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.8</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-grain-value-tree-view-set-same-units"></a><h3>gwy_grain_value_tree_view_set_same_units ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_grain_value_tree_view_set_same_units
                                                        (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gtk3/GtkTreeView.html"><span class="type">GtkTreeView</span></a> *treeview</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> same_units</code></em>);</pre>
<p>
Sets the availability of grain values that require the same lateral and
value units.
</p>
<p>
This <em class="parameter"><code>same_units</code></em> is <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>, grain values requiring matching units will be
disabled.  This means they will not be selectable, names and symbols will
be displayed greyed out, checkboxes will be made non-activatable (if they
are currently checked, they will not be unchecked but they will be displayed
as inconsistent).
</p>
<p>
By default <em class="parameter"><code>same_units</code></em> is <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a>.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>treeview</code></em> :</span></p></td>
<td>A tree view with grain values.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>same_units</code></em> :</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 the lateral and value units match and therefore all
grain values are calculable, <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> if they don't match and
values that require same units are disabled.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.8</p>
</div>
</div>
</div>
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