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  • Committer: Package Import Robot
  • Author(s): Robert Ancell
  • Date: 2013-01-10 12:53:20 UTC
  • mfrom: (1.14.16)
  • Revision ID: package-import@ubuntu.com-20130110125320-x13bjpwtqq36izs2
Tags: 2.24.14-0ubuntu1
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docs/reference/gtk/html/GtkTreeSortable.html
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<link rel="up" href="TreeWidgetObjects.html" title="Tree, List and Icon Grid Widgets">
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<link rel="prev" href="GtkIconView.html" title="GtkIconView">
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<link rel="next" href="GtkTreeModelSort.html" title="GtkTreeModelSort">
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<meta name="generator" content="GTK-Doc V1.18.1 (XML mode)">
 
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<meta name="generator" content="GTK-Doc V1.18 (XML mode)">
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<link rel="stylesheet" href="style.css" type="text/css">
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</head>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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                    <a class="link" href="GtkTreeSortable.html#GtkTreeSortable-struct" title="GtkTreeSortable">GtkTreeSortable</a>;
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struct              <a class="link" href="GtkTreeSortable.html#GtkTreeSortableIface" title="struct GtkTreeSortableIface">GtkTreeSortableIface</a>;
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<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a>                (<a class="link" href="GtkTreeSortable.html#GtkTreeIterCompareFunc" title="GtkTreeIterCompareFunc ()">*GtkTreeIterCompareFunc</a>)           (<em class="parameter"><code><a class="link" href="GtkTreeModel.html" title="GtkTreeModel"><span class="type">GtkTreeModel</span></a> *model</code></em>,
 
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<span class="returnvalue">gint</span>                (<a class="link" href="GtkTreeSortable.html#GtkTreeIterCompareFunc" title="GtkTreeIterCompareFunc ()">*GtkTreeIterCompareFunc</a>)           (<em class="parameter"><code><a class="link" href="GtkTreeModel.html" title="GtkTreeModel"><span class="type">GtkTreeModel</span></a> *model</code></em>,
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                                                         <em class="parameter"><code><a class="link" href="GtkTreeModel.html#GtkTreeIter"><span class="type">GtkTreeIter</span></a> *a</code></em>,
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                                                         <em class="parameter"><code><a class="link" href="GtkTreeModel.html#GtkTreeIter"><span class="type">GtkTreeIter</span></a> *b</code></em>,
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                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);
 
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                                                         <em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>);
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<span class="returnvalue">void</span>                <a class="link" href="GtkTreeSortable.html#gtk-tree-sortable-sort-column-changed" title="gtk_tree_sortable_sort_column_changed ()">gtk_tree_sortable_sort_column_changed</a>
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                                                        (<em class="parameter"><code><a class="link" href="GtkTreeSortable.html" title="GtkTreeSortable"><span class="type">GtkTreeSortable</span></a> *sortable</code></em>);
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<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            <a class="link" href="GtkTreeSortable.html#gtk-tree-sortable-get-sort-column-id" title="gtk_tree_sortable_get_sort_column_id ()">gtk_tree_sortable_get_sort_column_id</a>
 
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<span class="returnvalue">gboolean</span>            <a class="link" href="GtkTreeSortable.html#gtk-tree-sortable-get-sort-column-id" title="gtk_tree_sortable_get_sort_column_id ()">gtk_tree_sortable_get_sort_column_id</a>
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                                                        (<em class="parameter"><code><a class="link" href="GtkTreeSortable.html" title="GtkTreeSortable"><span class="type">GtkTreeSortable</span></a> *sortable</code></em>,
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                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *sort_column_id</code></em>,
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                                                         <em class="parameter"><code><a class="link" href="gtk-Standard-Enumerations.html#GtkSortType" title="enum GtkSortType"><span class="type">GtkSortType</span></a> *order</code></em>);
 
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                                                         <em class="parameter"><code><span class="type">gint</span> *sort_column_id</code></em>,
 
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                                                         <em class="parameter"><code><a class="link" href="gtk2-Standard-Enumerations.html#GtkSortType" title="enum GtkSortType"><span class="type">GtkSortType</span></a> *order</code></em>);
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<span class="returnvalue">void</span>                <a class="link" href="GtkTreeSortable.html#gtk-tree-sortable-set-sort-column-id" title="gtk_tree_sortable_set_sort_column_id ()">gtk_tree_sortable_set_sort_column_id</a>
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                                                        (<em class="parameter"><code><a class="link" href="GtkTreeSortable.html" title="GtkTreeSortable"><span class="type">GtkTreeSortable</span></a> *sortable</code></em>,
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                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> sort_column_id</code></em>,
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                                                         <em class="parameter"><code><a class="link" href="gtk-Standard-Enumerations.html#GtkSortType" title="enum GtkSortType"><span class="type">GtkSortType</span></a> order</code></em>);
 
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                                                         <em class="parameter"><code><span class="type">gint</span> sort_column_id</code></em>,
 
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                                                         <em class="parameter"><code><a class="link" href="gtk2-Standard-Enumerations.html#GtkSortType" title="enum GtkSortType"><span class="type">GtkSortType</span></a> order</code></em>);
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<span class="returnvalue">void</span>                <a class="link" href="GtkTreeSortable.html#gtk-tree-sortable-set-sort-func" title="gtk_tree_sortable_set_sort_func ()">gtk_tree_sortable_set_sort_func</a>     (<em class="parameter"><code><a class="link" href="GtkTreeSortable.html" title="GtkTreeSortable"><span class="type">GtkTreeSortable</span></a> *sortable</code></em>,
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                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> sort_column_id</code></em>,
 
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                                                         <em class="parameter"><code><span class="type">gint</span> sort_column_id</code></em>,
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                                                         <em class="parameter"><code><a class="link" href="GtkTreeSortable.html#GtkTreeIterCompareFunc" title="GtkTreeIterCompareFunc ()"><span class="type">GtkTreeIterCompareFunc</span></a> sort_func</code></em>,
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                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
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                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> destroy</code></em>);
 
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                                                         <em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>,
 
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                                                         <em class="parameter"><code><span class="type">GDestroyNotify</span> destroy</code></em>);
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<span class="returnvalue">void</span>                <a class="link" href="GtkTreeSortable.html#gtk-tree-sortable-set-default-sort-func" title="gtk_tree_sortable_set_default_sort_func ()">gtk_tree_sortable_set_default_sort_func</a>
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                                                        (<em class="parameter"><code><a class="link" href="GtkTreeSortable.html" title="GtkTreeSortable"><span class="type">GtkTreeSortable</span></a> *sortable</code></em>,
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                                                         <em class="parameter"><code><a class="link" href="GtkTreeSortable.html#GtkTreeIterCompareFunc" title="GtkTreeIterCompareFunc ()"><span class="type">GtkTreeIterCompareFunc</span></a> sort_func</code></em>,
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                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
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                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> destroy</code></em>);
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<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            <a class="link" href="GtkTreeSortable.html#gtk-tree-sortable-has-default-sort-func" title="gtk_tree_sortable_has_default_sort_func ()">gtk_tree_sortable_has_default_sort_func</a>
 
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                                                         <em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>,
 
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                                                         <em class="parameter"><code><span class="type">GDestroyNotify</span> destroy</code></em>);
 
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<span class="returnvalue">gboolean</span>            <a class="link" href="GtkTreeSortable.html#gtk-tree-sortable-has-default-sort-func" title="gtk_tree_sortable_has_default_sort_func ()">gtk_tree_sortable_has_default_sort_func</a>
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                                                        (<em class="parameter"><code><a class="link" href="GtkTreeSortable.html" title="GtkTreeSortable"><span class="type">GtkTreeSortable</span></a> *sortable</code></em>);
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</pre>
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</div>
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<a name="GtkTreeSortable.prerequisites"></a><h2>Prerequisites</h2>
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<p>
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GtkTreeSortable requires
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 <a class="link" href="GtkTreeModel.html" title="GtkTreeModel">GtkTreeModel</a> and  <a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject">GObject</a>.</p>
 
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 <a class="link" href="GtkTreeModel.html" title="GtkTreeModel">GtkTreeModel</a> and  GObject.</p>
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</div>
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<div class="refsect1">
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<a name="GtkTreeSortable.implementations"></a><h2>Known Implementations</h2>
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<div class="refsect1">
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<a name="GtkTreeSortable.signals"></a><h2>Signals</h2>
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<pre class="synopsis">
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  "<a class="link" href="GtkTreeSortable.html#GtkTreeSortable-sort-column-changed" title='The "sort-column-changed" signal'>sort-column-changed</a>"                            : <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">Run Last</code></a>
 
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  "<a class="link" href="GtkTreeSortable.html#GtkTreeSortable-sort-column-changed" title='The "sort-column-changed" signal'>sort-column-changed</a>"                            : <code class="literal">Run Last</code>
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</pre>
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</div>
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<div class="refsect1">
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<hr>
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<div class="refsect2">
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<a name="GtkTreeIterCompareFunc"></a><h3>GtkTreeIterCompareFunc ()</h3>
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<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a>                (*GtkTreeIterCompareFunc)           (<em class="parameter"><code><a class="link" href="GtkTreeModel.html" title="GtkTreeModel"><span class="type">GtkTreeModel</span></a> *model</code></em>,
 
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<pre class="programlisting"><span class="returnvalue">gint</span>                (*GtkTreeIterCompareFunc)           (<em class="parameter"><code><a class="link" href="GtkTreeModel.html" title="GtkTreeModel"><span class="type">GtkTreeModel</span></a> *model</code></em>,
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                                                         <em class="parameter"><code><a class="link" href="GtkTreeModel.html#GtkTreeIter"><span class="type">GtkTreeIter</span></a> *a</code></em>,
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                                                         <em class="parameter"><code><a class="link" href="GtkTreeModel.html#GtkTreeIter"><span class="type">GtkTreeIter</span></a> *b</code></em>,
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                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
 
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                                                         <em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>);</pre>
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<p>
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A GtkTreeIterCompareFunc should return a negative integer, zero, or a positive
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integer if <em class="parameter"><code>a</code></em> sorts before <em class="parameter"><code>b</code></em>, <em class="parameter"><code>a</code></em> sorts with <em class="parameter"><code>b</code></em>, or <em class="parameter"><code>a</code></em> sorts after <em class="parameter"><code>b</code></em>
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<hr>
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<div class="refsect2">
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<a name="gtk-tree-sortable-get-sort-column-id"></a><h3>gtk_tree_sortable_get_sort_column_id ()</h3>
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<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            gtk_tree_sortable_get_sort_column_id
 
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<pre class="programlisting"><span class="returnvalue">gboolean</span>            gtk_tree_sortable_get_sort_column_id
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                                                        (<em class="parameter"><code><a class="link" href="GtkTreeSortable.html" title="GtkTreeSortable"><span class="type">GtkTreeSortable</span></a> *sortable</code></em>,
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                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *sort_column_id</code></em>,
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                                                         <em class="parameter"><code><a class="link" href="gtk-Standard-Enumerations.html#GtkSortType" title="enum GtkSortType"><span class="type">GtkSortType</span></a> *order</code></em>);</pre>
 
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                                                         <em class="parameter"><code><span class="type">gint</span> *sort_column_id</code></em>,
 
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                                                         <em class="parameter"><code><a class="link" href="gtk2-Standard-Enumerations.html#GtkSortType" title="enum GtkSortType"><span class="type">GtkSortType</span></a> *order</code></em>);</pre>
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<p>
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Fills in <em class="parameter"><code>sort_column_id</code></em> and <em class="parameter"><code>order</code></em> with the current sort column and the
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order. It returns <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> unless the <em class="parameter"><code>sort_column_id</code></em> is 
 
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order. It returns <code class="literal">TRUE</code> unless the <em class="parameter"><code>sort_column_id</code></em> is 
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<code class="literal">GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID</code> or 
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<code class="literal">GTK_TREE_SORTABLE_UNSORTED_SORT_COLUMN_ID</code>.
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</p>
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</tr>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>order</code></em> :</span></p></td>
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<td>The <a class="link" href="gtk-Standard-Enumerations.html#GtkSortType" title="enum GtkSortType"><span class="type">GtkSortType</span></a> to be filled in</td>
 
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<td>The <a class="link" href="gtk2-Standard-Enumerations.html#GtkSortType" title="enum GtkSortType"><span class="type">GtkSortType</span></a> to be filled in</td>
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</tr>
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<tr>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
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<td>
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<a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the sort column is not one of the special sort
 
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<code class="literal">TRUE</code> if the sort column is not one of the special sort
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column ids.</td>
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</tr>
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</tbody>
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<a name="gtk-tree-sortable-set-sort-column-id"></a><h3>gtk_tree_sortable_set_sort_column_id ()</h3>
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<pre class="programlisting"><span class="returnvalue">void</span>                gtk_tree_sortable_set_sort_column_id
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                                                        (<em class="parameter"><code><a class="link" href="GtkTreeSortable.html" title="GtkTreeSortable"><span class="type">GtkTreeSortable</span></a> *sortable</code></em>,
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                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> sort_column_id</code></em>,
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                                                         <em class="parameter"><code><a class="link" href="gtk-Standard-Enumerations.html#GtkSortType" title="enum GtkSortType"><span class="type">GtkSortType</span></a> order</code></em>);</pre>
 
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                                                         <em class="parameter"><code><span class="type">gint</span> sort_column_id</code></em>,
 
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                                                         <em class="parameter"><code><a class="link" href="gtk2-Standard-Enumerations.html#GtkSortType" title="enum GtkSortType"><span class="type">GtkSortType</span></a> order</code></em>);</pre>
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<p>
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Sets the current sort column to be <em class="parameter"><code>sort_column_id</code></em>. The <em class="parameter"><code>sortable</code></em> will
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resort itself to reflect this change, after emitting a
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<div class="refsect2">
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<a name="gtk-tree-sortable-set-sort-func"></a><h3>gtk_tree_sortable_set_sort_func ()</h3>
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<pre class="programlisting"><span class="returnvalue">void</span>                gtk_tree_sortable_set_sort_func     (<em class="parameter"><code><a class="link" href="GtkTreeSortable.html" title="GtkTreeSortable"><span class="type">GtkTreeSortable</span></a> *sortable</code></em>,
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                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> sort_column_id</code></em>,
 
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                                                         <em class="parameter"><code><span class="type">gint</span> sort_column_id</code></em>,
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                                                         <em class="parameter"><code><a class="link" href="GtkTreeSortable.html#GtkTreeIterCompareFunc" title="GtkTreeIterCompareFunc ()"><span class="type">GtkTreeIterCompareFunc</span></a> sort_func</code></em>,
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                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
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                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> destroy</code></em>);</pre>
 
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                                                         <em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>,
 
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                                                         <em class="parameter"><code><span class="type">GDestroyNotify</span> destroy</code></em>);</pre>
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<p>
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Sets the comparison function used when sorting to be <em class="parameter"><code>sort_func</code></em>. If the
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current sort column id of <em class="parameter"><code>sortable</code></em> is the same as <em class="parameter"><code>sort_column_id</code></em>, then 
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</tr>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
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<td>User data to pass to <em class="parameter"><code>sort_func</code></em>, or <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
 
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<td>User data to pass to <em class="parameter"><code>sort_func</code></em>, or <a href="/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL:CAPS"><code class="literal">NULL</code></a>. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
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</td>
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</tr>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>destroy</code></em> :</span></p></td>
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<td>Destroy notifier of <em class="parameter"><code>user_data</code></em>, or <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
 
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<td>Destroy notifier of <em class="parameter"><code>user_data</code></em>, or <a href="/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL:CAPS"><code class="literal">NULL</code></a>. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
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</td>
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<pre class="programlisting"><span class="returnvalue">void</span>                gtk_tree_sortable_set_default_sort_func
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                                                        (<em class="parameter"><code><a class="link" href="GtkTreeSortable.html" title="GtkTreeSortable"><span class="type">GtkTreeSortable</span></a> *sortable</code></em>,
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                                                         <em class="parameter"><code><a class="link" href="GtkTreeSortable.html#GtkTreeIterCompareFunc" title="GtkTreeIterCompareFunc ()"><span class="type">GtkTreeIterCompareFunc</span></a> sort_func</code></em>,
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                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
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                                                         <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> destroy</code></em>);</pre>
 
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                                                         <em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>,
 
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                                                         <em class="parameter"><code><span class="type">GDestroyNotify</span> destroy</code></em>);</pre>
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<p>
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Sets the default comparison function used when sorting to be <em class="parameter"><code>sort_func</code></em>.  
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If the current sort column id of <em class="parameter"><code>sortable</code></em> is
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this function.
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</p>
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<p>
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If <em class="parameter"><code>sort_func</code></em> is <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, then there will be no default comparison function.
 
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If <em class="parameter"><code>sort_func</code></em> is <a href="/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL:CAPS"><code class="literal">NULL</code></a>, then there will be no default comparison function.
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This means that once the model  has been sorted, it can't go back to the
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default state. In this case, when the current sort column id of <em class="parameter"><code>sortable</code></em> 
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is <code class="literal">GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID</code>, the model will be unsorted.
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</tr>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
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<td>User data to pass to <em class="parameter"><code>sort_func</code></em>, or <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
 
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<td>User data to pass to <em class="parameter"><code>sort_func</code></em>, or <a href="/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL:CAPS"><code class="literal">NULL</code></a>. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
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</td>
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</tr>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>destroy</code></em> :</span></p></td>
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<td>Destroy notifier of <em class="parameter"><code>user_data</code></em>, or <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
 
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<td>Destroy notifier of <em class="parameter"><code>user_data</code></em>, or <a href="/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL:CAPS"><code class="literal">NULL</code></a>. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
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</td>
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</tr>
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</tbody>
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<hr>
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<div class="refsect2">
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<a name="gtk-tree-sortable-has-default-sort-func"></a><h3>gtk_tree_sortable_has_default_sort_func ()</h3>
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<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            gtk_tree_sortable_has_default_sort_func
 
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<pre class="programlisting"><span class="returnvalue">gboolean</span>            gtk_tree_sortable_has_default_sort_func
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                                                        (<em class="parameter"><code><a class="link" href="GtkTreeSortable.html" title="GtkTreeSortable"><span class="type">GtkTreeSortable</span></a> *sortable</code></em>);</pre>
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<p>
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Returns <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the model has a default sort function. This is used
 
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Returns <code class="literal">TRUE</code> if the model has a default sort function. This is used
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primarily by GtkTreeViewColumns in order to determine if a model can 
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go back to the default state, or not.
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</p>
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<tr>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
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<td>
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<a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a>, if the model has a default sort function</td>
 
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<code class="literal">TRUE</code>, if the model has a default sort function</td>
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</tr>
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</tbody>
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</table></div>
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<div class="refsect2">
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<a name="GtkTreeSortable-sort-column-changed"></a><h3>The <code class="literal">"sort-column-changed"</code> signal</h3>
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<pre class="programlisting"><span class="returnvalue">void</span>                user_function                      (<a class="link" href="GtkTreeSortable.html" title="GtkTreeSortable"><span class="type">GtkTreeSortable</span></a> *sortable,
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                                                        <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a>         user_data)      : <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">Run Last</code></a></pre>
 
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                                                        <span class="type">gpointer</span>         user_data)      : <code class="literal">Run Last</code></pre>
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<p>
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The ::sort-column-changed signal is emitted when the sort column
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or sort order of <em class="parameter"><code>sortable</code></em> is changed. The signal is emitted before
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</div>
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