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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-atkvalue">
<refnamediv>
<refname>atk.Value</refname>
<refpurpose>the ATK interface implemented by valuators and components
which display or select a value from a bounded range of values.
</refpurpose>
</refnamediv>
<refsect1>
<title>Synopsis</title>
<classsynopsis language="python">
<ooclass><classname>atk.Value</classname></ooclass>
<ooclass><classname>gobject.GInterface</classname></ooclass>
<methodsynopsis language="python">
<methodname><link linkend="method-atkvalue--get-current-value">get_current_value</link></methodname>
</methodsynopsis>
<methodsynopsis language="python">
<methodname><link linkend="method-atkvalue--get-maximum-value">get_maximum_value</link></methodname>
</methodsynopsis>
<methodsynopsis language="python">
<methodname><link linkend="method-atkvalue--get-minimum-value">get_minimum_value</link></methodname>
</methodsynopsis>
<methodsynopsis language="python">
<methodname><link linkend="method-atkvalue--set-current-value">set_current_value</link></methodname>
<methodparam><parameter role="keyword">value</parameter></methodparam>
</methodsynopsis>
</classsynopsis>
</refsect1>
<refsect1>
<title>Description</title>
<para><link
linkend="class-atkvalue"><classname>atk.Value</classname></link> should
be implemented for components which either display a value from a
bounded range, or which allow the user to specify a value from a bounded
range, or both. For instance, most sliders and range controls, as well
as dials, should have <link
linkend="class-atkobject"><classname>atk.Object</classname></link>
representations which implement <link
linkend="class-atkvalue"><classname>atk.Value</classname></link> on the
component's behalf. <link
linkend="class-atkvalue"><classname>atk.Value</classname></link> objects
may be read-only, in which case attempts to alter the value return
<literal>False</literal> to indicate failure.</para>
</refsect1>
<refsect1>
<title>Methods</title>
<refsect2 id="method-atkvalue--get-current-value">
<title>atk.Value.get_current_value</title>
<programlisting><methodsynopsis language="python">
<methodname>get_current_value</methodname>
</methodsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><emphasis>Returns</emphasis> :</term>
<listitem><simpara>the current accessible
value</simpara></listitem>
</varlistentry>
</variablelist>
<para>Gets the value of this object.</para>
</refsect2>
<refsect2 id="method-atkvalue--get-maximum-value">
<title>atk.Value.get_maximum_value</title>
<programlisting><methodsynopsis language="python">
<methodname>get_maximum_value</methodname>
</methodsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><emphasis>Returns</emphasis> :</term>
<listitem><simpara>the maximum accessible
value</simpara></listitem>
</varlistentry>
</variablelist>
<para>Gets the maximum value of this object.</para>
</refsect2>
<refsect2 id="method-atkvalue--get-minimum-value">
<title>atk.Value.get_minimum_value</title>
<programlisting><methodsynopsis language="python">
<methodname>get_minimum_value</methodname>
</methodsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><emphasis>Returns</emphasis> :</term>
<listitem><simpara> the minimum accessible
value</simpara></listitem>
</varlistentry>
</variablelist>
<para>Gets the minimum value of this object.</para>
</refsect2>
<refsect2 id="method-atkvalue--set-current-value">
<title>atk.Value.set_current_value</title>
<programlisting><methodsynopsis language="python">
<methodname>set_current_value</methodname>
<methodparam><parameter role="keyword">value</parameter></methodparam>
</methodsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><parameter role="keyword">value</parameter> :</term>
<listitem><simpara>the desired new accessible
value.</simpara></listitem>
</varlistentry>
<varlistentry>
<term><emphasis>Returns</emphasis> :</term>
<listitem><simpara><literal>True</literal> if new value is
successfully set, <literal>False</literal>
otherwise.</simpara></listitem>
</varlistentry>
</variablelist>
<para>Sets the value of this object.</para>
</refsect2>
</refsect1>
</refentry>
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