360 lines
16 KiB
HTML
360 lines
16 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>gimpundo</title>
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2">
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<link rel="start" href="index.html" title="GIMP Library Reference Manual">
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<link rel="up" href="libgimp-image.html" title="Manupulating Images and their Properties">
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<link rel="prev" href="libgimp-gimptools.html" title="gimptools">
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<link rel="next" href="libgimp-gimpvectors.html" title="gimpvectors">
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<meta name="generator" content="GTK-Doc V1.10 (XML mode)">
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<link rel="stylesheet" href="style.css" type="text/css">
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<link rel="part" href="libgimp.html" title="Part I. GIMP Library">
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<link rel="chapter" href="libgimp-general.html" title="Functions not Related to Specific Images">
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<link rel="chapter" href="libgimp-image.html" title="Manupulating Images and their Properties">
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<link rel="chapter" href="libgimp-data.html" title="Data Objects">
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<link rel="chapter" href="libgimp-selectors.html" title="Controlling the Core's Selection Dialogs">
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<link rel="part" href="libgimpui.html" title="Part II. GIMP User Interface Library">
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<link rel="chapter" href="libgimpui-hierarchy.html" title="Object Hierarchy">
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<link rel="index" href="libgimp-index.html" title="Index">
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<link rel="index" href="libgimp-index-new-in-2-2.html" title="Index of new symbols in GIMP 2.2">
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<link rel="index" href="libgimp-index-new-in-2-4.html" title="Index of new symbols in GIMP 2.4">
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<link rel="index" href="libgimp-index-new-in-2-6.html" title="Index of new symbols in GIMP 2.6">
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<link rel="index" href="libgimp-index-deprecated.html" title="Index of deprecated symbols">
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</head>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2">
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<tr valign="middle">
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<td><a accesskey="p" href="libgimp-gimptools.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td>
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<td><a accesskey="u" href="libgimp-image.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td>
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<td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td>
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<th width="100%" align="center">GIMP Library Reference Manual</th>
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<td><a accesskey="n" href="libgimp-gimpvectors.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td>
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</tr>
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<tr><td colspan="5" class="shortcuts"><nobr><a href="#libgimp-gimpundo.synopsis" class="shortcut">Top</a>
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<a href="#libgimp-gimpundo.description" class="shortcut">Description</a></nobr></td></tr>
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</table>
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<div class="refentry" lang="en">
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<a name="libgimp-gimpundo"></a><div class="titlepage"></div>
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<div class="refnamediv"><table width="100%"><tr>
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<td valign="top">
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<h2><span class="refentrytitle"><a name="libgimp-gimpundo.top_of_page"></a>gimpundo</span></h2>
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<p>gimpundo — Control of undo/redo.</p>
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</td>
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<td valign="top" align="right"></td>
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</tr></table></div>
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<div class="refsynopsisdiv">
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<a name="libgimp-gimpundo.synopsis"></a><h2>Synopsis</h2>
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<pre class="synopsis">
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<a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> <a class="link" href="libgimp-gimpundo.html#gimp-image-undo-group-start" title="gimp_image_undo_group_start ()">gimp_image_undo_group_start</a> (<a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint32"
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>gint32</a> image_ID);
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<a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> <a class="link" href="libgimp-gimpundo.html#gimp-image-undo-group-end" title="gimp_image_undo_group_end ()">gimp_image_undo_group_end</a> (<a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint32"
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>gint32</a> image_ID);
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<a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> <a class="link" href="libgimp-gimpundo.html#gimp-image-undo-is-enabled" title="gimp_image_undo_is_enabled ()">gimp_image_undo_is_enabled</a> (<a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint32"
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>gint32</a> image_ID);
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<a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> <a class="link" href="libgimp-gimpundo.html#gimp-image-undo-disable" title="gimp_image_undo_disable ()">gimp_image_undo_disable</a> (<a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint32"
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>gint32</a> image_ID);
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<a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> <a class="link" href="libgimp-gimpundo.html#gimp-image-undo-enable" title="gimp_image_undo_enable ()">gimp_image_undo_enable</a> (<a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint32"
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>gint32</a> image_ID);
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<a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> <a class="link" href="libgimp-gimpundo.html#gimp-image-undo-freeze" title="gimp_image_undo_freeze ()">gimp_image_undo_freeze</a> (<a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint32"
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>gint32</a> image_ID);
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<a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> <a class="link" href="libgimp-gimpundo.html#gimp-image-undo-thaw" title="gimp_image_undo_thaw ()">gimp_image_undo_thaw</a> (<a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint32"
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>gint32</a> image_ID);
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</pre>
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</div>
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<div class="refsect1" lang="en">
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<a name="libgimp-gimpundo.description"></a><h2>Description</h2>
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<p>
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Control of undo/redo.
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</p>
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</div>
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<div class="refsect1" lang="en">
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<a name="libgimp-gimpundo.details"></a><h2>Details</h2>
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<div class="refsect2" lang="en">
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<a name="gimp-image-undo-group-start"></a><h3>gimp_image_undo_group_start ()</h3>
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<pre class="programlisting"><a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> gimp_image_undo_group_start (<a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint32"
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>gint32</a> image_ID);</pre>
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<p>
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Starts a group undo.
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</p>
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<p>
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This function is used to start a group undo--necessary for logically
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combining two or more undo operations into a single operation. This
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call must be used in conjunction with a <a class="link" href="libgimp-gimpundo.html#gimp-image-undo-group-end" title="gimp_image_undo_group_end ()"><code class="function">gimp_image_undo_group_end()</code></a>
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call.</p>
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<p>
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</p>
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<div class="variablelist"><table border="0">
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<col align="left" valign="top">
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<tbody>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>image_ID</code></em> :</span></p></td>
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<td> The ID of the image in which to open an undo group.
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</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> TRUE on success.
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</td>
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</tr>
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</tbody>
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</table></div>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<a name="gimp-image-undo-group-end"></a><h3>gimp_image_undo_group_end ()</h3>
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<pre class="programlisting"><a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> gimp_image_undo_group_end (<a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint32"
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>gint32</a> image_ID);</pre>
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<p>
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Finish a group undo.
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</p>
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<p>
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This function must be called once for each
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<a class="link" href="libgimp-gimpundo.html#gimp-image-undo-group-start" title="gimp_image_undo_group_start ()"><code class="function">gimp_image_undo_group_start()</code></a> call that is made.</p>
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<p>
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</p>
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<div class="variablelist"><table border="0">
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<col align="left" valign="top">
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<tbody>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>image_ID</code></em> :</span></p></td>
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<td> The ID of the image in which to close an undo group.
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</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> TRUE on success.
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</td>
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</tr>
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</tbody>
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</table></div>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<a name="gimp-image-undo-is-enabled"></a><h3>gimp_image_undo_is_enabled ()</h3>
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<pre class="programlisting"><a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> gimp_image_undo_is_enabled (<a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint32"
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>gint32</a> image_ID);</pre>
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<p>
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Check if the image's undo stack is enabled.
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</p>
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<p>
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This procedure checks if the image's undo stack is currently enabled
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or disabled. This is useful when several plugins or scripts call
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each other and want to check if their caller has already used
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<a class="link" href="libgimp-gimpundo.html#gimp-image-undo-disable" title="gimp_image_undo_disable ()"><code class="function">gimp_image_undo_disable()</code></a> or <a class="link" href="libgimp-gimpundo.html#gimp-image-undo-freeze" title="gimp_image_undo_freeze ()"><code class="function">gimp_image_undo_freeze()</code></a>.</p>
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<p>
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</p>
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<div class="variablelist"><table border="0">
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<col align="left" valign="top">
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<tbody>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>image_ID</code></em> :</span></p></td>
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<td> The image.
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</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> TRUE if undo is enabled for this image.
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</td>
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</tr>
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</tbody>
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</table></div>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<a name="gimp-image-undo-disable"></a><h3>gimp_image_undo_disable ()</h3>
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<pre class="programlisting"><a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> gimp_image_undo_disable (<a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint32"
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>gint32</a> image_ID);</pre>
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<p>
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Disable the image's undo stack.
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</p>
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<p>
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This procedure disables the image's undo stack, allowing subsequent
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operations to ignore their undo steps. This is generally called in
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conjunction with <a class="link" href="libgimp-gimpundo.html#gimp-image-undo-enable" title="gimp_image_undo_enable ()"><code class="function">gimp_image_undo_enable()</code></a> to temporarily disable an
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image undo stack. This is advantageous because saving undo steps can
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be time and memory intensive.</p>
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<p>
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</p>
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<div class="variablelist"><table border="0">
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<col align="left" valign="top">
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<tbody>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>image_ID</code></em> :</span></p></td>
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<td> The image.
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</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> TRUE if the image undo has been disabled.
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</td>
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</tr>
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</tbody>
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</table></div>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<a name="gimp-image-undo-enable"></a><h3>gimp_image_undo_enable ()</h3>
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<pre class="programlisting"><a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> gimp_image_undo_enable (<a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint32"
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>gint32</a> image_ID);</pre>
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<p>
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Enable the image's undo stack.
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</p>
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<p>
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This procedure enables the image's undo stack, allowing subsequent
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operations to store their undo steps. This is generally called in
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conjunction with <a class="link" href="libgimp-gimpundo.html#gimp-image-undo-disable" title="gimp_image_undo_disable ()"><code class="function">gimp_image_undo_disable()</code></a> to temporarily disable an
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image undo stack.</p>
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<p>
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</p>
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<div class="variablelist"><table border="0">
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<col align="left" valign="top">
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<tbody>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>image_ID</code></em> :</span></p></td>
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<td> The image.
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</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> TRUE if the image undo has been enabled.
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</td>
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</tr>
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</tbody>
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</table></div>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<a name="gimp-image-undo-freeze"></a><h3>gimp_image_undo_freeze ()</h3>
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<pre class="programlisting"><a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> gimp_image_undo_freeze (<a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint32"
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>gint32</a> image_ID);</pre>
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<p>
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Freeze the image's undo stack.
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</p>
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<p>
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This procedure freezes the image's undo stack, allowing subsequent
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operations to ignore their undo steps. This is generally called in
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conjunction with <a class="link" href="libgimp-gimpundo.html#gimp-image-undo-thaw" title="gimp_image_undo_thaw ()"><code class="function">gimp_image_undo_thaw()</code></a> to temporarily disable an
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image undo stack. This is advantageous because saving undo steps can
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be time and memory intensive. <a class="link" href="libgimp-gimpundo.html#gimp-image-undo-freeze" title="gimp_image_undo_freeze ()"><code class="function">gimp_image_undo_freeze()</code></a> /
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<a class="link" href="libgimp-gimpundo.html#gimp-image-undo-thaw" title="gimp_image_undo_thaw ()"><code class="function">gimp_image_undo_thaw()</code></a> and <a class="link" href="libgimp-gimpundo.html#gimp-image-undo-disable" title="gimp_image_undo_disable ()"><code class="function">gimp_image_undo_disable()</code></a> /
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<a class="link" href="libgimp-gimpundo.html#gimp-image-undo-enable" title="gimp_image_undo_enable ()"><code class="function">gimp_image_undo_enable()</code></a> differ in that the former does not free up
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all undo steps when undo is thawed, so is more suited to interactive
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in-situ previews. It is important in this case that the image is
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back to the same state it was frozen in before thawing, else 'undo'
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behaviour is undefined.</p>
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<p>
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</p>
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<div class="variablelist"><table border="0">
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<col align="left" valign="top">
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<tbody>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>image_ID</code></em> :</span></p></td>
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<td> The image.
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</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> TRUE if the image undo has been frozen.
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</td>
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</tr>
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</tbody>
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</table></div>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<a name="gimp-image-undo-thaw"></a><h3>gimp_image_undo_thaw ()</h3>
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<pre class="programlisting"><a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> gimp_image_undo_thaw (<a
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href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint32"
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>gint32</a> image_ID);</pre>
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<p>
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Thaw the image's undo stack.
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</p>
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<p>
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This procedure thaws the image's undo stack, allowing subsequent
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operations to store their undo steps. This is generally called in
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conjunction with <a class="link" href="libgimp-gimpundo.html#gimp-image-undo-freeze" title="gimp_image_undo_freeze ()"><code class="function">gimp_image_undo_freeze()</code></a> to temporarily freeze an
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image undo stack. <a class="link" href="libgimp-gimpundo.html#gimp-image-undo-thaw" title="gimp_image_undo_thaw ()"><code class="function">gimp_image_undo_thaw()</code></a> does NOT free the undo
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stack as <a class="link" href="libgimp-gimpundo.html#gimp-image-undo-enable" title="gimp_image_undo_enable ()"><code class="function">gimp_image_undo_enable()</code></a> does, so is suited for situations
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where one wishes to leave the undo stack in the same state in which
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one found it despite non-destructively playing with the image in the
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meantime. An example would be in-situ plugin previews. Balancing
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freezes and thaws and ensuring image consistancy is the
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responsibility of the caller.</p>
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<p>
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</p>
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<div class="variablelist"><table border="0">
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<col align="left" valign="top">
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<tbody>
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<tr>
|
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<td><p><span class="term"><em class="parameter"><code>image_ID</code></em> :</span></p></td>
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<td> The image.
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</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> TRUE if the image undo has been thawed.
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</td>
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