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<?xml version="1.0" standalone="no"?>
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd">
<refentry id="class-gtkscrollbar">
<refnamediv>
<refname>gtk.Scrollbar</refname>
<refpurpose>a base class for scrollbar widgets.</refpurpose>
</refnamediv>
<refsect1>
<title>Synopsis</title>
<classsynopsis language="python">
<ooclass><classname>gtk.Scrollbar</classname></ooclass>
<ooclass><classname><link
linkend="class-gtkrange">gtk.Range</link></classname></ooclass>
</classsynopsis>
</refsect1>
<refsect1>
<title>Ancestry</title>
<synopsis>+-- <link linkend="class-gobject">gobject.GObject</link>
+-- <link linkend="class-gtkobject">gtk.Object</link>
+-- <link linkend="class-gtkwidget">gtk.Widget</link>
+-- <link linkend="class-gtkrange">gtk.Range</link>
+-- <link linkend="class-gtkscrollbar">gtk.Scrollbar</link>
</synopsis>
</refsect1>
<refsect1>
<title>Implemented Interfaces</title>
<para>
<link linkend="class-gtkscrollbar"><classname>gtk.Scrollbar</classname></link>
implements
<link linkend="class-gtkbuildable"><classname>gtk.Buildable</classname></link>
</para>
</refsect1>
<refsect1 id="properties-gtkscrollbar">
<title>gtk.Scrollbar Properties</title>
<para><link linkend="properties-gtkobject">gtk.Object Properties</link></para>
<para><link linkend="properties-gtkwidget">gtk.Widget Properties</link></para>
<para><link linkend="properties-gtkrange">gtk.Range Properties</link></para>
</refsect1>
<refsect1 id="style-properties-gtkscrollbar">
<title>gtk.Scrollbar Style Properties</title>
<para><link linkend="style-properties-gtkwidget">gtk.Widget Style Properties</link></para>
<para><link linkend="style-properties-gtkrange">gtk.Range Style Properties</link></para>
<blockquote role="properties">
<informaltable pgwide="1" frame="none">
<tgroup cols="3">
<colspec column="1" colwidth="1in"/>
<colspec column="2" colwidth="1in"/>
<colspec column="3" colwidth="4in"/>
<tbody>
<row valign="top">
<entry>"fixed-slider-length"</entry>
<entry>Read</entry>
<entry>If <literal>True</literal> don't change the slider
size, just lock it to the minimum length</entry>
</row>
<row valign="top">
<entry>"has-backward-stepper"</entry>
<entry>Read</entry>
<entry>If <literal>True</literal> display the standard
backward arrow button</entry>
</row>
<row valign="top">
<entry>"has-forward-stepper"</entry>
<entry>Read</entry>
<entry>If <literal>True</literal> display the standard forward
arrow button</entry>
</row>
<row valign="top">
<entry>"has-secondary-backward-stepper"</entry>
<entry>Read</entry>
<entry>If <literal>True</literal> display a second backward
arrow button on the opposite end of the scrollbar</entry>
</row>
<row valign="top">
<entry>"has-secondary-forward-stepper"</entry>
<entry>Read</entry>
<entry>If <literal>True</literal> display a secondary forward
arrow button on the opposite end of the scrollbar</entry>
</row>
<row valign="top">
<entry>min-slider-length""</entry>
<entry>Read</entry>
<entry>The minimum length of scrollbar slider</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</blockquote>
</refsect1>
<refsect1 id="signal-prototypes-gtkscrollbar">
<title>gtk.Scrollbar Signal Prototypes</title>
<para><link linkend="signal-prototypes-gobject">gobject.GObject Signal Prototypes</link></para>
<para><link linkend="signal-prototypes-gtkobject">gtk.Object Signal Prototypes</link></para>
<para><link linkend="signal-prototypes-gtkwidget">gtk.Widget Signal Prototypes</link></para>
<para><link linkend="signal-prototypes-gtkrange">gtk.Range Signal Prototypes</link></para>
</refsect1>
<refsect1>
<title>Description</title>
<para>The <link
linkend="class-gtkscrollbar"><classname>gtk.Scrollbar</classname></link>
widget is an abstract base class for <link
linkend="class-gtkhscrollbar"><classname>gtk.HScrollbar</classname></link>
and <link
linkend="class-gtkvscrollbar"><classname>gtk.VScrollbar</classname></link>.
The position of the thumb in a scrollbar is controlled by the scroll
adjustments. The <link
linkend="class-gtkscrollbar"><classname>gtk.Scrollbar</classname></link> uses the attributes in an adjustment (see <link
linkend="class-gtkadjustment"><classname>gtk.Adjustment</classname></link>) as follows:</para>
<itemizedlist>
<listitem>
<simpara>the <literal>adjustment.lower</literal> attribute is the
minimum value of the scroll region</simpara>
</listitem>
<listitem>
<simpara>the <literal>adjustment.upper</literal> attribute is the
maximum value of the scroll region</simpara>
</listitem>
<listitem>
<simpara>the <literal>adjustment.value</literal> attribute
represents the position of the scrollbar, which must be between
<literal>adjustment.lower</literal> and <literal>adjustment.upper</literal>
- <literal>adjustment.page_size</literal></simpara>
</listitem>
<listitem>
<simpara>the <literal>adjustment.page_size</literal> attribute
represents the size of the visible scrollable area</simpara>
</listitem>
<listitem>
<simpara>the <literal>adjustment.step_increment</literal> attribute
is the distance to scroll when the small stepper arrows are clicked</simpara>
</listitem>
<listitem>
<simpara>the <literal>adjustment.page_increment</literal> attribute
is the distance to scroll when the <keycap>Page Up</keycap> or <keycap>Page
Down</keycap> keys are pressed</simpara>
</listitem>
</itemizedlist>
</refsect1>
</refentry>
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