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<a href="#GOUndoUnary.description" class="shortcut">Description</a>
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<a href="#GOUndoUnary.object-hierarchy" class="shortcut">Object Hierarchy</a>
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<div class="refentry">
<a name="GOUndoUnary"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="GOUndoUnary.top_of_page"></a>GOUndoUnary</span></h2>
<p>GOUndoUnary</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="GOUndoUnary.synopsis"></a><h2>Synopsis</h2>
<a name="GOUndo"></a><a name="GOUndoBinary"></a><a name="GOUndoGroup"></a><pre class="synopsis">struct <a class="link" href="GOUndoUnary.html#GOUndo-struct" title="struct GOUndo">GOUndo</a>;
struct <a class="link" href="GOUndoUnary.html#GOUndoBinary-struct" title="struct GOUndoBinary">GOUndoBinary</a>;
struct <a class="link" href="GOUndoUnary.html#GOUndoBinaryClass" title="struct GOUndoBinaryClass">GOUndoBinaryClass</a>;
<span class="returnvalue">void</span> (<a class="link" href="GOUndoUnary.html#GOUndoBinaryFunc" title="GOUndoBinaryFunc ()">*GOUndoBinaryFunc</a>) (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> a</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> b</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> data</code></em>);
struct <a class="link" href="GOUndoUnary.html#GOUndoClass" title="struct GOUndoClass">GOUndoClass</a>;
struct <a class="link" href="GOUndoUnary.html#GOUndoGroup-struct" title="struct GOUndoGroup">GOUndoGroup</a>;
struct <a class="link" href="GOUndoUnary.html#GOUndoGroupClass" title="struct GOUndoGroupClass">GOUndoGroupClass</a>;
struct <a class="link" href="GOUndoUnary.html#GOUndoUnary-struct" title="struct GOUndoUnary">GOUndoUnary</a>;
struct <a class="link" href="GOUndoUnary.html#GOUndoUnaryClass" title="struct GOUndoUnaryClass">GOUndoUnaryClass</a>;
<span class="returnvalue">void</span> (<a class="link" href="GOUndoUnary.html#GOUndoUnaryFunc" title="GOUndoUnaryFunc ()">*GOUndoUnaryFunc</a>) (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> a</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> data</code></em>);
<a class="link" href="GOUndoUnary.html#GOUndo"><span class="returnvalue">GOUndo</span></a> * <a class="link" href="GOUndoUnary.html#go-undo-binary-new" title="go_undo_binary_new ()">go_undo_binary_new</a> (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> a</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> b</code></em>,
<em class="parameter"><code><a class="link" href="GOUndoUnary.html#GOUndoBinaryFunc" title="GOUndoBinaryFunc ()"><span class="type">GOUndoBinaryFunc</span></a> undo</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Miscellaneous-Utility-Functions.html#GFreeFunc"><span class="type">GFreeFunc</span></a> fa</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Miscellaneous-Utility-Functions.html#GFreeFunc"><span class="type">GFreeFunc</span></a> fb</code></em>);
<a class="link" href="GOUndoUnary.html#GOUndo"><span class="returnvalue">GOUndo</span></a> * <a class="link" href="GOUndoUnary.html#go-undo-combine" title="go_undo_combine ()">go_undo_combine</a> (<em class="parameter"><code><a class="link" href="GOUndoUnary.html#GOUndo"><span class="type">GOUndo</span></a> *a</code></em>,
<em class="parameter"><code><a class="link" href="GOUndoUnary.html#GOUndo"><span class="type">GOUndo</span></a> *b</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GOUndoUnary.html#go-undo-group-add" title="go_undo_group_add ()">go_undo_group_add</a> (<em class="parameter"><code><a class="link" href="GOUndoUnary.html#GOUndoGroup"><span class="type">GOUndoGroup</span></a> *g</code></em>,
<em class="parameter"><code><a class="link" href="GOUndoUnary.html#GOUndo"><span class="type">GOUndo</span></a> *u</code></em>);
<a class="link" href="GOUndoUnary.html#GOUndoGroup"><span class="returnvalue">GOUndoGroup</span></a> * <a class="link" href="GOUndoUnary.html#go-undo-group-new" title="go_undo_group_new ()">go_undo_group_new</a> (<em class="parameter"><code><span class="type">void</span></code></em>);
<a class="link" href="GOUndoUnary.html#GOUndo"><span class="returnvalue">GOUndo</span></a> * <a class="link" href="GOUndoUnary.html#go-undo-unary-new" title="go_undo_unary_new ()">go_undo_unary_new</a> (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> a</code></em>,
<em class="parameter"><code><a class="link" href="GOUndoUnary.html#GOUndoUnaryFunc" title="GOUndoUnaryFunc ()"><span class="type">GOUndoUnaryFunc</span></a> undo</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Miscellaneous-Utility-Functions.html#GFreeFunc"><span class="type">GFreeFunc</span></a> fa</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GOUndoUnary.html#go-undo-undo" title="go_undo_undo ()">go_undo_undo</a> (<em class="parameter"><code><a class="link" href="GOUndoUnary.html#GOUndo"><span class="type">GOUndo</span></a> *u</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GOUndoUnary.html#go-undo-undo-with-data" title="go_undo_undo_with_data ()">go_undo_undo_with_data</a> (<em class="parameter"><code><a class="link" href="GOUndoUnary.html#GOUndo"><span class="type">GOUndo</span></a> *u</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> data</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="GOUndoUnary.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>
+----GOUndo
+----<a class="link" href="GOUndoUnary.html#GOUndoBinary">GOUndoBinary</a>
+----<a class="link" href="GOUndoUnary.html#GOUndoGroup">GOUndoGroup</a>
+----<a class="link" href="GOUndoUnary.html" title="GOUndoUnary">GOUndoUnary</a>
</pre>
<pre class="synopsis">
<a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a>
+----<a class="link" href="GOUndoUnary.html#GOUndo">GOUndo</a>
+----GOUndoBinary
</pre>
<pre class="synopsis">
<a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a>
+----<a class="link" href="GOUndoUnary.html#GOUndo">GOUndo</a>
+----GOUndoGroup
</pre>
<pre class="synopsis">
<a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a>
+----<a class="link" href="GOUndoUnary.html#GOUndo">GOUndo</a>
+----GOUndoUnary
</pre>
</div>
<div class="refsect1">
<a name="GOUndoUnary.description"></a><h2>Description</h2>
<p>
</p>
</div>
<div class="refsect1">
<a name="GOUndoUnary.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GOUndo-struct"></a><h3>struct GOUndo</h3>
<pre class="programlisting">struct GOUndo;</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GOUndoBinary-struct"></a><h3>struct GOUndoBinary</h3>
<pre class="programlisting">struct GOUndoBinary;</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GOUndoBinaryClass"></a><h3>struct GOUndoBinaryClass</h3>
<pre class="programlisting">struct GOUndoBinaryClass {
GOUndoClass base;
};
</pre>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><a class="link" href="GOUndoUnary.html#GOUndoClass" title="struct GOUndoClass"><span class="type">GOUndoClass</span></a> <em class="structfield"><code><a name="GOUndoBinaryClass.base"></a>base</code></em>;</span></p></td>
<td>base class.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GOUndoBinaryFunc"></a><h3>GOUndoBinaryFunc ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> (*GOUndoBinaryFunc) (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> a</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> b</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> data</code></em>);</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GOUndoClass"></a><h3>struct GOUndoClass</h3>
<pre class="programlisting">struct GOUndoClass {
GObjectClass base;
void (*undo) (GOUndo *u, gpointer data);
};
</pre>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObjectClass"><span class="type">GObjectClass</span></a> <em class="structfield"><code><a name="GOUndoClass.base"></a>base</code></em>;</span></p></td>
<td>base class.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GOUndoClass.undo"></a>undo</code></em> ()</span></p></td>
<td>undo.
};</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GOUndoGroup-struct"></a><h3>struct GOUndoGroup</h3>
<pre class="programlisting">struct GOUndoGroup;</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GOUndoGroupClass"></a><h3>struct GOUndoGroupClass</h3>
<pre class="programlisting">struct GOUndoGroupClass {
GOUndoClass base;
};
</pre>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><a class="link" href="GOUndoUnary.html#GOUndoClass" title="struct GOUndoClass"><span class="type">GOUndoClass</span></a> <em class="structfield"><code><a name="GOUndoGroupClass.base"></a>base</code></em>;</span></p></td>
<td>base class.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GOUndoUnary-struct"></a><h3>struct GOUndoUnary</h3>
<pre class="programlisting">struct GOUndoUnary;</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GOUndoUnaryClass"></a><h3>struct GOUndoUnaryClass</h3>
<pre class="programlisting">struct GOUndoUnaryClass {
GOUndoClass base;
};
</pre>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><a class="link" href="GOUndoUnary.html#GOUndoClass" title="struct GOUndoClass"><span class="type">GOUndoClass</span></a> <em class="structfield"><code><a name="GOUndoUnaryClass.base"></a>base</code></em>;</span></p></td>
<td>base class.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GOUndoUnaryFunc"></a><h3>GOUndoUnaryFunc ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> (*GOUndoUnaryFunc) (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> a</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> data</code></em>);</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="go-undo-binary-new"></a><h3>go_undo_binary_new ()</h3>
<pre class="programlisting"><a class="link" href="GOUndoUnary.html#GOUndo"><span class="returnvalue">GOUndo</span></a> * go_undo_binary_new (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> a</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> b</code></em>,
<em class="parameter"><code><a class="link" href="GOUndoUnary.html#GOUndoBinaryFunc" title="GOUndoBinaryFunc ()"><span class="type">GOUndoBinaryFunc</span></a> undo</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Miscellaneous-Utility-Functions.html#GFreeFunc"><span class="type">GFreeFunc</span></a> fa</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Miscellaneous-Utility-Functions.html#GFreeFunc"><span class="type">GFreeFunc</span></a> fb</code></em>);</pre>
<p>
This function creates a new undo object for undo operations of two
arguments. (In addition, an undo-time argument is added for context.)
</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>a</code></em> :</span></p></td>
<td>first argument for undo operation</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>b</code></em> :</span></p></td>
<td>second argument for undo operation</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>undo</code></em> :</span></p></td>
<td>function to call with arguments <em class="parameter"><code>a</code></em> and <em class="parameter"><code>b</code></em> for undo. <span class="annotation">[<acronym title="The callback is valid until first called."><span class="acronym">scope async</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>fa</code></em> :</span></p></td>
<td>optional function to free <em class="parameter"><code>a</code></em>. <span class="annotation">[<acronym title="The callback is valid until first called."><span class="acronym">scope async</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>fb</code></em> :</span></p></td>
<td>optional function to free <em class="parameter"><code>b</code></em>. <span class="annotation">[<acronym title="The callback is valid until first called."><span class="acronym">scope async</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a new undo object. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="go-undo-combine"></a><h3>go_undo_combine ()</h3>
<pre class="programlisting"><a class="link" href="GOUndoUnary.html#GOUndo"><span class="returnvalue">GOUndo</span></a> * go_undo_combine (<em class="parameter"><code><a class="link" href="GOUndoUnary.html#GOUndo"><span class="type">GOUndo</span></a> *a</code></em>,
<em class="parameter"><code><a class="link" href="GOUndoUnary.html#GOUndo"><span class="type">GOUndo</span></a> *b</code></em>);</pre>
<p>
This function takes ownership of the argument references and gives ownership
of the result to the caller. Either argument may be NULL in which case the
other is returned.
</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>a</code></em> :</span></p></td>
<td>optional first undo operation. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>b</code></em> :</span></p></td>
<td>optional last undo operation. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the combination of two undo operations. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="go-undo-group-add"></a><h3>go_undo_group_add ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> go_undo_group_add (<em class="parameter"><code><a class="link" href="GOUndoUnary.html#GOUndoGroup"><span class="type">GOUndoGroup</span></a> *g</code></em>,
<em class="parameter"><code><a class="link" href="GOUndoUnary.html#GOUndo"><span class="type">GOUndo</span></a> *u</code></em>);</pre>
<p>
This function adds <em class="parameter"><code>u</code></em> to <em class="parameter"><code>g</code></em>.
</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>g</code></em> :</span></p></td>
<td>undo group</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>u</code></em> :</span></p></td>
<td>undo object</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="go-undo-group-new"></a><h3>go_undo_group_new ()</h3>
<pre class="programlisting"><a class="link" href="GOUndoUnary.html#GOUndoGroup"><span class="returnvalue">GOUndoGroup</span></a> * go_undo_group_new (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
This function creates a new undo group for compounding undo objects.
</p>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a new, empty undo group.</td>
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<div class="refsect2">
<a name="go-undo-unary-new"></a><h3>go_undo_unary_new ()</h3>
<pre class="programlisting"><a class="link" href="GOUndoUnary.html#GOUndo"><span class="returnvalue">GOUndo</span></a> * go_undo_unary_new (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> a</code></em>,
<em class="parameter"><code><a class="link" href="GOUndoUnary.html#GOUndoUnaryFunc" title="GOUndoUnaryFunc ()"><span class="type">GOUndoUnaryFunc</span></a> undo</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Miscellaneous-Utility-Functions.html#GFreeFunc"><span class="type">GFreeFunc</span></a> fa</code></em>);</pre>
<p>
This function creates a new undo object for undo operations of one
argument. (In addition, an undo-time argument is added for context.)
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<td><p><span class="term"><em class="parameter"><code>a</code></em> :</span></p></td>
<td>argument for undo operation</td>
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<td><p><span class="term"><em class="parameter"><code>undo</code></em> :</span></p></td>
<td>function to call with argument <em class="parameter"><code>a</code></em> for undo. <span class="annotation">[<acronym title="The callback is valid until first called."><span class="acronym">scope async</span></acronym>]</span>
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<td><p><span class="term"><em class="parameter"><code>fa</code></em> :</span></p></td>
<td>optional function to free <em class="parameter"><code>a</code></em>. <span class="annotation">[<acronym title="The callback is valid until first called."><span class="acronym">scope async</span></acronym>]</span>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a new undo object. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
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<div class="refsect2">
<a name="go-undo-undo"></a><h3>go_undo_undo ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> go_undo_undo (<em class="parameter"><code><a class="link" href="GOUndoUnary.html#GOUndo"><span class="type">GOUndo</span></a> *u</code></em>);</pre>
<p>
Execute the stored undo operation.
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<td><p><span class="term"><em class="parameter"><code>u</code></em> :</span></p></td>
<td>undo object</td>
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<div class="refsect2">
<a name="go-undo-undo-with-data"></a><h3>go_undo_undo_with_data ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> go_undo_undo_with_data (<em class="parameter"><code><a class="link" href="GOUndoUnary.html#GOUndo"><span class="type">GOUndo</span></a> *u</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> data</code></em>);</pre>
<p>
Execute the stored undo operation. <em class="parameter"><code>data</code></em> is supplied to the undo
operation as an extra argument. It is meant not to affect the undo
operation in any way, but rather supply a context through which
progress and errors can be reported.
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<td><p><span class="term"><em class="parameter"><code>u</code></em> :</span></p></td>
<td>undo object</td>
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<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td>
<td>user data</td>
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