<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Graphics.UI.Gtk.Layout.Expander</title><link href="ocean.css" rel="stylesheet" type="text/css" title="Ocean" /><script src="haddock-util.js" type="text/javascript"></script><script type="text/javascript">//<![CDATA[
window.onload = function () {pageLoad();setSynopsis("mini_Graphics-UI-Gtk-Layout-Expander.html");};
//]]>
</script></head><body><div id="package-header"><ul class="links" id="page-menu"><li><a href="src/Graphics-UI-Gtk-Layout-Expander.html">Source</a></li><li><a href="index.html">Contents</a></li><li><a href="doc-index.html">Index</a></li></ul><p class="caption">gtk-0.12.0: Binding to the Gtk+ graphical user interface library.</p></div><div id="content"><div id="module-header"><table class="info"><tr><th>Portability</th><td>portable (depends on GHC)</td></tr><tr><th>Stability</th><td>provisional</td></tr><tr><th>Maintainer</th><td>gtk2hs-users@lists.sourceforge.net</td></tr></table><p class="caption">Graphics.UI.Gtk.Layout.Expander</p></div><div id="table-of-contents"><p class="caption">Contents</p><ul><li><a href="#g:1">Detail
</a></li><li><a href="#g:2">Class Hierarchy
</a></li><li><a href="#g:3">Types
</a></li><li><a href="#g:4">Constructors
</a></li><li><a href="#g:5">Methods
</a></li><li><a href="#g:6">Attributes
</a></li><li><a href="#g:7">Signals
</a></li></ul></div><div id="description"><p class="caption">Description</p><div class="doc"><p>A container which can hide its child
</p><ul><li> Module available since Gtk+ version 2.4
</li></ul></div></div><div id="synopsis"><p id="control.syn" class="caption expander" onclick="toggleSection('syn')">Synopsis</p><ul id="section.syn" class="hide" onclick="toggleSection('syn')"><li class="src short"><span class="keyword">data</span> <a href="#t:Expander">Expander</a> </li><li class="src short"><span class="keyword">class</span> <a href="Graphics-UI-Gtk-Abstract-Bin.html#t:BinClass">BinClass</a> o => <a href="#t:ExpanderClass">ExpanderClass</a> o </li><li class="src short"><a href="#v:castToExpander">castToExpander</a> :: <a href="/usr/share/doc/ghc/html/libraries/glib-0.12.0/System-Glib-GObject.html#t:GObjectClass">GObjectClass</a> obj => obj -> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a></li><li class="src short"><a href="#v:gTypeExpander">gTypeExpander</a> :: <a href="Graphics-UI-Gtk-Abstract-Widget.html#t:GType">GType</a></li><li class="src short"><a href="#v:toExpander">toExpander</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:ExpanderClass">ExpanderClass</a> o => o -> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a></li><li class="src short"><a href="#v:expanderNew">expanderNew</a> :: <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Char.html#t:String">String</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a></li><li class="src short"><a href="#v:expanderNewWithMnemonic">expanderNewWithMnemonic</a> :: <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Char.html#t:String">String</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a></li><li class="src short"><a href="#v:expanderSetExpanded">expanderSetExpanded</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Bool.html#t:Bool">Bool</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></li><li class="src short"><a href="#v:expanderGetExpanded">expanderGetExpanded</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Bool.html#t:Bool">Bool</a></li><li class="src short"><a href="#v:expanderSetSpacing">expanderSetSpacing</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Int.html#t:Int">Int</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></li><li class="src short"><a href="#v:expanderGetSpacing">expanderGetSpacing</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Int.html#t:Int">Int</a></li><li class="src short"><a href="#v:expanderSetLabel">expanderSetLabel</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Char.html#t:String">String</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></li><li class="src short"><a href="#v:expanderGetLabel">expanderGetLabel</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Char.html#t:String">String</a></li><li class="src short"><a href="#v:expanderSetUseUnderline">expanderSetUseUnderline</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Bool.html#t:Bool">Bool</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></li><li class="src short"><a href="#v:expanderGetUseUnderline">expanderGetUseUnderline</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Bool.html#t:Bool">Bool</a></li><li class="src short"><a href="#v:expanderSetUseMarkup">expanderSetUseMarkup</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Bool.html#t:Bool">Bool</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></li><li class="src short"><a href="#v:expanderGetUseMarkup">expanderGetUseMarkup</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Bool.html#t:Bool">Bool</a></li><li class="src short"><a href="#v:expanderSetLabelWidget">expanderSetLabelWidget</a> :: <a href="Graphics-UI-Gtk-Abstract-Widget.html#t:WidgetClass">WidgetClass</a> labelWidget => <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> -> labelWidget -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></li><li class="src short"><a href="#v:expanderGetLabelWidget">expanderGetLabelWidget</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="Graphics-UI-Gtk-Abstract-Widget.html#t:Widget">Widget</a></li><li class="src short"><a href="#v:expanderExpanded">expanderExpanded</a> :: <a href="/usr/share/doc/ghc/html/libraries/glib-0.12.0/System-Glib-Attributes.html#t:Attr">Attr</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Bool.html#t:Bool">Bool</a></li><li class="src short"><a href="#v:expanderLabel">expanderLabel</a> :: <a href="/usr/share/doc/ghc/html/libraries/glib-0.12.0/System-Glib-Attributes.html#t:Attr">Attr</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Char.html#t:String">String</a></li><li class="src short"><a href="#v:expanderUseUnderline">expanderUseUnderline</a> :: <a href="/usr/share/doc/ghc/html/libraries/glib-0.12.0/System-Glib-Attributes.html#t:Attr">Attr</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Bool.html#t:Bool">Bool</a></li><li class="src short"><a href="#v:expanderUseMarkup">expanderUseMarkup</a> :: <a href="/usr/share/doc/ghc/html/libraries/glib-0.12.0/System-Glib-Attributes.html#t:Attr">Attr</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Bool.html#t:Bool">Bool</a></li><li class="src short"><a href="#v:expanderSpacing">expanderSpacing</a> :: <a href="/usr/share/doc/ghc/html/libraries/glib-0.12.0/System-Glib-Attributes.html#t:Attr">Attr</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Int.html#t:Int">Int</a></li><li class="src short"><a href="#v:expanderLabelWidget">expanderLabelWidget</a> :: <a href="Graphics-UI-Gtk-Abstract-Widget.html#t:WidgetClass">WidgetClass</a> labelWidget => <a href="/usr/share/doc/ghc/html/libraries/glib-0.12.0/System-Glib-Attributes.html#t:ReadWriteAttr">ReadWriteAttr</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> <a href="Graphics-UI-Gtk-Abstract-Widget.html#t:Widget">Widget</a> labelWidget</li><li class="src short"><a href="#v:expanderLabelFill">expanderLabelFill</a> :: <a href="/usr/share/doc/ghc/html/libraries/glib-0.12.0/System-Glib-Attributes.html#t:Attr">Attr</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Bool.html#t:Bool">Bool</a></li><li class="src short"><a href="#v:onActivate">onActivate</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> (<a href="/usr/share/doc/ghc/html/libraries/glib-0.12.0/System-Glib-Signals.html#t:ConnectId">ConnectId</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a>)</li><li class="src short"><a href="#v:afterActivate">afterActivate</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> (<a href="/usr/share/doc/ghc/html/libraries/glib-0.12.0/System-Glib-Signals.html#t:ConnectId">ConnectId</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a>)</li></ul></div><div id="interface"><h1 id="g:1">Detail
</h1><div class="doc"><p>A <code><a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a></code> allows the user to hide or show its child by clicking on an
expander triangle similar to the triangles used in a <code><a href="Graphics-UI-Gtk-ModelView-TreeView.html#t:TreeView">TreeView</a></code>.
</p><p>Normally you use an expander as you would use any other descendant of
<code><a href="Graphics-UI-Gtk-Abstract-Bin.html#t:Bin">Bin</a></code>; you create the child widget and use
<code>Graphics.UI.Gtk.Abstract.Container.containerAdd</code> to add it to the
expander. When the expander is toggled, it will take care of showing and
hiding the child automatically.
</p></div><h1 id="g:2">Class Hierarchy
</h1><div class="doc"><pre>
| <code><a href="/usr/share/doc/ghc/html/libraries/glib-0.12.0/System-Glib-GObject.html#t:GObject">GObject</a></code>
| +----<code><a href="Graphics-UI-Gtk-Abstract-Object.html#t:Object">Object</a></code>
| +----<code><a href="Graphics-UI-Gtk-Abstract-Widget.html#t:Widget">Widget</a></code>
| +----<code><a href="Graphics-UI-Gtk-Abstract-Container.html#t:Container">Container</a></code>
| +----<code><a href="Graphics-UI-Gtk-Abstract-Bin.html#t:Bin">Bin</a></code>
| +----Expander
</pre></div><h1 id="g:3">Types
</h1><div class="top"><p class="src"><span class="keyword">data</span> <a name="t:Expander" class="def">Expander</a> <a href="src/Graphics-UI-Gtk-Types.html#Expander" class="link">Source</a></p><div class="subs instances"><p id="control.i:Expander" class="caption collapser" onclick="toggleSection('i:Expander')">Instances</p><div id="section.i:Expander" class="show"><table><tr><td class="src"><a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Eq.html#t:Eq">Eq</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Ord.html#t:Ord">Ord</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="/usr/share/doc/ghc/html/libraries/glib-0.12.0/System-Glib-GObject.html#t:GObjectClass">GObjectClass</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Graphics-UI-Gtk-Layout-Expander.html#t:ExpanderClass">ExpanderClass</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Graphics-UI-Gtk-Abstract-Bin.html#t:BinClass">BinClass</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Graphics-UI-Gtk-Abstract-Container.html#t:ContainerClass">ContainerClass</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Graphics-UI-Gtk-Abstract-Widget.html#t:WidgetClass">WidgetClass</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Graphics-UI-Gtk-Abstract-Object.html#t:ObjectClass">ObjectClass</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a></td><td class="doc empty"> </td></tr></table></div></div></div><div class="top"><p class="src"><span class="keyword">class</span> <a href="Graphics-UI-Gtk-Abstract-Bin.html#t:BinClass">BinClass</a> o => <a name="t:ExpanderClass" class="def">ExpanderClass</a> o <a href="src/Graphics-UI-Gtk-Types.html#ExpanderClass" class="link">Source</a></p><div class="subs instances"><p id="control.i:ExpanderClass" class="caption collapser" onclick="toggleSection('i:ExpanderClass')">Instances</p><div id="section.i:ExpanderClass" class="show"><table><tr><td class="src"><a href="Graphics-UI-Gtk-Layout-Expander.html#t:ExpanderClass">ExpanderClass</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a></td><td class="doc empty"> </td></tr></table></div></div></div><div class="top"><p class="src"><a name="v:castToExpander" class="def">castToExpander</a> :: <a href="/usr/share/doc/ghc/html/libraries/glib-0.12.0/System-Glib-GObject.html#t:GObjectClass">GObjectClass</a> obj => obj -> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a><a href="src/Graphics-UI-Gtk-Types.html#castToExpander" class="link">Source</a></p></div><div class="top"><p class="src"><a name="v:gTypeExpander" class="def">gTypeExpander</a> :: <a href="Graphics-UI-Gtk-Abstract-Widget.html#t:GType">GType</a><a href="src/Graphics-UI-Gtk-Types.html#gTypeExpander" class="link">Source</a></p></div><div class="top"><p class="src"><a name="v:toExpander" class="def">toExpander</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:ExpanderClass">ExpanderClass</a> o => o -> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a><a href="src/Graphics-UI-Gtk-Types.html#toExpander" class="link">Source</a></p></div><h1 id="g:4">Constructors
</h1><div class="top"><p class="src"><a name="v:expanderNew" class="def">expanderNew</a> :: <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Char.html#t:String">String</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a><a href="src/Graphics-UI-Gtk-Layout-Expander.html#expanderNew" class="link">Source</a></p><div class="doc"><p>Creates a new expander using the given string as the text of the label.
</p></div></div><div class="top"><p class="src"><a name="v:expanderNewWithMnemonic" class="def">expanderNewWithMnemonic</a><a href="src/Graphics-UI-Gtk-Layout-Expander.html#expanderNewWithMnemonic" class="link">Source</a></p><div class="subs arguments"><p class="caption">Arguments</p><table><tr><td class="src">:: <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Char.html#t:String">String</a></td><td class="doc"><p><code>label</code> - the text of the label with an underscore in
front of the mnemonic character
</p></td></tr><tr><td class="src">-> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a></td><td class="doc empty"> </td></tr></table></div><div class="doc"><p>Creates a new expander using <code>label</code> as the text of the label. If
characters in <code>label</code> are preceded by an underscore, they are underlined. If
you need a literal underscore character in a label, use '__' (two
underscores). The first underlined character represents a keyboard
accelerator called a mnemonic. Pressing Alt and that key activates the
button.
</p></div></div><h1 id="g:5">Methods
</h1><div class="top"><p class="src"><a name="v:expanderSetExpanded" class="def">expanderSetExpanded</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Bool.html#t:Bool">Bool</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a><a href="src/Graphics-UI-Gtk-Layout-Expander.html#expanderSetExpanded" class="link">Source</a></p><div class="doc"><p>Sets the state of the expander. Set to <code>True</code>, if you want the child
widget to be revealed, and <code>False</code> if you want the child widget to be
hidden.
</p></div></div><div class="top"><p class="src"><a name="v:expanderGetExpanded" class="def">expanderGetExpanded</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Bool.html#t:Bool">Bool</a><a href="src/Graphics-UI-Gtk-Layout-Expander.html#expanderGetExpanded" class="link">Source</a></p><div class="doc"><p>Queries a <code><a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a></code> and returns its current state. Returns <code>True</code> if the
child widget is revealed.
</p><p>See <code><a href="Graphics-UI-Gtk-Layout-Expander.html#v:expanderSetExpanded">expanderSetExpanded</a></code>.
</p></div></div><div class="top"><p class="src"><a name="v:expanderSetSpacing" class="def">expanderSetSpacing</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Int.html#t:Int">Int</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a><a href="src/Graphics-UI-Gtk-Layout-Expander.html#expanderSetSpacing" class="link">Source</a></p><div class="doc"><p>Sets the spacing field of <code>expander</code>, which is the number of pixels to
place between expander and the child.
</p></div></div><div class="top"><p class="src"><a name="v:expanderGetSpacing" class="def">expanderGetSpacing</a><a href="src/Graphics-UI-Gtk-Layout-Expander.html#expanderGetSpacing" class="link">Source</a></p><div class="subs arguments"><p class="caption">Arguments</p><table><tr><td class="src">:: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a></td><td class="doc empty"> </td></tr><tr><td class="src">-> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Int.html#t:Int">Int</a></td><td class="doc"><p>returns spacing between the expander and child.
</p></td></tr></table></div><div class="doc"><p>Gets the value set by <code><a href="Graphics-UI-Gtk-Layout-Expander.html#v:expanderSetSpacing">expanderSetSpacing</a></code>.
</p></div></div><div class="top"><p class="src"><a name="v:expanderSetLabel" class="def">expanderSetLabel</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Char.html#t:String">String</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a><a href="src/Graphics-UI-Gtk-Layout-Expander.html#expanderSetLabel" class="link">Source</a></p><div class="doc"><p>Sets the text of the label of the expander to <code>label</code>.
</p><p>This will also clear any previously set labels.
</p></div></div><div class="top"><p class="src"><a name="v:expanderGetLabel" class="def">expanderGetLabel</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Char.html#t:String">String</a><a href="src/Graphics-UI-Gtk-Layout-Expander.html#expanderGetLabel" class="link">Source</a></p><div class="doc"><p>Fetches the text from the label of the expander, as set by
<code><a href="Graphics-UI-Gtk-Layout-Expander.html#v:expanderSetLabel">expanderSetLabel</a></code>.
</p></div></div><div class="top"><p class="src"><a name="v:expanderSetUseUnderline" class="def">expanderSetUseUnderline</a><a href="src/Graphics-UI-Gtk-Layout-Expander.html#expanderSetUseUnderline" class="link">Source</a></p><div class="subs arguments"><p class="caption">Arguments</p><table><tr><td class="src">:: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a></td><td class="doc empty"> </td></tr><tr><td class="src">-> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Bool.html#t:Bool">Bool</a></td><td class="doc"><p><code>useUnderline</code> - <code>True</code> if underlines in the text indicate
mnemonics
</p></td></tr><tr><td class="src">-> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></td><td class="doc empty"> </td></tr></table></div><div class="doc"><p>If true, an underline in the text of the expander label indicates the
next character should be used for the mnemonic accelerator key.
</p></div></div><div class="top"><p class="src"><a name="v:expanderGetUseUnderline" class="def">expanderGetUseUnderline</a><a href="src/Graphics-UI-Gtk-Layout-Expander.html#expanderGetUseUnderline" class="link">Source</a></p><div class="subs arguments"><p class="caption">Arguments</p><table><tr><td class="src">:: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a></td><td class="doc empty"> </td></tr><tr><td class="src">-> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Bool.html#t:Bool">Bool</a></td><td class="doc"><p>returns <code>True</code> if an embedded underline in the expander
label indicates the mnemonic accelerator keys.
</p></td></tr></table></div><div class="doc"><p>Returns whether an embedded underline in the expander label indicates a
mnemonic. See <code><a href="Graphics-UI-Gtk-Layout-Expander.html#v:expanderSetUseUnderline">expanderSetUseUnderline</a></code>.
</p></div></div><div class="top"><p class="src"><a name="v:expanderSetUseMarkup" class="def">expanderSetUseMarkup</a><a href="src/Graphics-UI-Gtk-Layout-Expander.html#expanderSetUseMarkup" class="link">Source</a></p><div class="subs arguments"><p class="caption">Arguments</p><table><tr><td class="src">:: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a></td><td class="doc empty"> </td></tr><tr><td class="src">-> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Bool.html#t:Bool">Bool</a></td><td class="doc"><p><code>useMarkup</code> - <code>True</code> if the label's text should be parsed
for markup
</p></td></tr><tr><td class="src">-> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></td><td class="doc empty"> </td></tr></table></div><div class="doc"><p>Sets whether the text of the label contains markup in Pango's text markup
language. See <code>Graphics.UI.Gtk.Display.Label.labelSetMarkup</code>.
</p></div></div><div class="top"><p class="src"><a name="v:expanderGetUseMarkup" class="def">expanderGetUseMarkup</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Bool.html#t:Bool">Bool</a><a href="src/Graphics-UI-Gtk-Layout-Expander.html#expanderGetUseMarkup" class="link">Source</a></p><div class="doc"><p>Returns whether the label's text is interpreted as marked up with the
Pango text markup language. See <code><a href="Graphics-UI-Gtk-Layout-Expander.html#v:expanderSetUseMarkup">expanderSetUseMarkup</a></code>.
</p></div></div><div class="top"><p class="src"><a name="v:expanderSetLabelWidget" class="def">expanderSetLabelWidget</a><a href="src/Graphics-UI-Gtk-Layout-Expander.html#expanderSetLabelWidget" class="link">Source</a></p><div class="subs arguments"><p class="caption">Arguments</p><table><tr><td class="src">:: <a href="Graphics-UI-Gtk-Abstract-Widget.html#t:WidgetClass">WidgetClass</a> labelWidget</td><td class="doc empty"> </td></tr><tr><td class="src">=> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a></td><td class="doc empty"> </td></tr><tr><td class="src">-> labelWidget</td><td class="doc"><p><code>labelWidget</code> - the new label widget
</p></td></tr><tr><td class="src">-> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></td><td class="doc empty"> </td></tr></table></div><div class="doc"><p>Set the label widget for the expander. This is the widget that will
appear embedded alongside the expander arrow.
</p></div></div><div class="top"><p class="src"><a name="v:expanderGetLabelWidget" class="def">expanderGetLabelWidget</a><a href="src/Graphics-UI-Gtk-Layout-Expander.html#expanderGetLabelWidget" class="link">Source</a></p><div class="subs arguments"><p class="caption">Arguments</p><table><tr><td class="src">:: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a></td><td class="doc empty"> </td></tr><tr><td class="src">-> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="Graphics-UI-Gtk-Abstract-Widget.html#t:Widget">Widget</a></td><td class="doc"><p>returns the label widget
</p></td></tr></table></div><div class="doc"><p>Retrieves the label widget for the frame. See <code><a href="Graphics-UI-Gtk-Layout-Expander.html#v:expanderSetLabelWidget">expanderSetLabelWidget</a></code>.
</p></div></div><h1 id="g:6">Attributes
</h1><div class="top"><p class="src"><a name="v:expanderExpanded" class="def">expanderExpanded</a> :: <a href="/usr/share/doc/ghc/html/libraries/glib-0.12.0/System-Glib-Attributes.html#t:Attr">Attr</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Bool.html#t:Bool">Bool</a><a href="src/Graphics-UI-Gtk-Layout-Expander.html#expanderExpanded" class="link">Source</a></p><div class="doc"><p>Whether the expander has been opened to reveal the child widget.
</p><p>Default value: <code>False</code>
</p></div></div><div class="top"><p class="src"><a name="v:expanderLabel" class="def">expanderLabel</a> :: <a href="/usr/share/doc/ghc/html/libraries/glib-0.12.0/System-Glib-Attributes.html#t:Attr">Attr</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Char.html#t:String">String</a><a href="src/Graphics-UI-Gtk-Layout-Expander.html#expanderLabel" class="link">Source</a></p><div class="doc"><p>Text of the expander's label.
</p></div></div><div class="top"><p class="src"><a name="v:expanderUseUnderline" class="def">expanderUseUnderline</a> :: <a href="/usr/share/doc/ghc/html/libraries/glib-0.12.0/System-Glib-Attributes.html#t:Attr">Attr</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Bool.html#t:Bool">Bool</a><a href="src/Graphics-UI-Gtk-Layout-Expander.html#expanderUseUnderline" class="link">Source</a></p><div class="doc"><p>If set, an underline in the text indicates the next character should be
used for the mnemonic accelerator key.
</p><p>Default value: <code>False</code>
</p></div></div><div class="top"><p class="src"><a name="v:expanderUseMarkup" class="def">expanderUseMarkup</a> :: <a href="/usr/share/doc/ghc/html/libraries/glib-0.12.0/System-Glib-Attributes.html#t:Attr">Attr</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Bool.html#t:Bool">Bool</a><a href="src/Graphics-UI-Gtk-Layout-Expander.html#expanderUseMarkup" class="link">Source</a></p><div class="doc"><p>The text of the label includes XML markup. See pango_parse_markup().
</p><p>Default value: <code>False</code>
</p></div></div><div class="top"><p class="src"><a name="v:expanderSpacing" class="def">expanderSpacing</a> :: <a href="/usr/share/doc/ghc/html/libraries/glib-0.12.0/System-Glib-Attributes.html#t:Attr">Attr</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Int.html#t:Int">Int</a><a href="src/Graphics-UI-Gtk-Layout-Expander.html#expanderSpacing" class="link">Source</a></p><div class="doc"><p>Space to put between the label and the child.
</p><p>Allowed values: >= 0
</p><p>Default value: 0
</p></div></div><div class="top"><p class="src"><a name="v:expanderLabelWidget" class="def">expanderLabelWidget</a> :: <a href="Graphics-UI-Gtk-Abstract-Widget.html#t:WidgetClass">WidgetClass</a> labelWidget => <a href="/usr/share/doc/ghc/html/libraries/glib-0.12.0/System-Glib-Attributes.html#t:ReadWriteAttr">ReadWriteAttr</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> <a href="Graphics-UI-Gtk-Abstract-Widget.html#t:Widget">Widget</a> labelWidget<a href="src/Graphics-UI-Gtk-Layout-Expander.html#expanderLabelWidget" class="link">Source</a></p><div class="doc"><p>A widget to display in place of the usual expander label.
</p></div></div><div class="top"><p class="src"><a name="v:expanderLabelFill" class="def">expanderLabelFill</a> :: <a href="/usr/share/doc/ghc/html/libraries/glib-0.12.0/System-Glib-Attributes.html#t:Attr">Attr</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Bool.html#t:Bool">Bool</a><a href="src/Graphics-UI-Gtk-Layout-Expander.html#expanderLabelFill" class="link">Source</a></p><div class="doc"><p>Whether the label widget should fill all available horizontal space.
</p><p>Default value: <code><a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Bool.html#v:False">False</a></code>
</p></div></div><h1 id="g:7">Signals
</h1><div class="top"><p class="src"><a name="v:onActivate" class="def">onActivate</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> (<a href="/usr/share/doc/ghc/html/libraries/glib-0.12.0/System-Glib-Signals.html#t:ConnectId">ConnectId</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a>)<a href="src/Graphics-UI-Gtk-Layout-Expander.html#onActivate" class="link">Source</a></p></div><div class="top"><p class="src"><a name="v:afterActivate" class="def">afterActivate</a> :: <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> (<a href="/usr/share/doc/ghc/html/libraries/glib-0.12.0/System-Glib-Signals.html#t:ConnectId">ConnectId</a> <a href="Graphics-UI-Gtk-Layout-Expander.html#t:Expander">Expander</a>)<a href="src/Graphics-UI-Gtk-Layout-Expander.html#afterActivate" class="link">Source</a></p></div></div></div><div id="footer"><p>Produced by <a href="http://www.haskell.org/haddock/">Haddock</a> version 2.9.2</p></div></body></html>
