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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-gtktreerowreference">
<refnamediv>
<refname>gtk.TreeRowReference</refname>
<refpurpose>an object maintaining a persistent reference to a <link
linkend="class-gtktreemodel"><classname>gtk.TreeModel</classname></link>
row (new in PyGTK 2.4)</refpurpose>
</refnamediv>
<refsect1>
<title>Synopsis</title>
<classsynopsis language="python">
<ooclass><classname>gtk.TreeRowReference</classname></ooclass>
<ooclass><classname>gobject.GBoxed</classname></ooclass>
<constructorsynopsis language="python">
<methodname><link linkend="constructor-gtktreerowreference">gtk.TreeRowReference</link></methodname>
<methodparam><parameter role="keyword">model</parameter></methodparam>
<methodparam><parameter role="keyword">path</parameter></methodparam>
</constructorsynopsis>
<methodsynopsis language="python">
<methodname><link linkend="method-gtktreerowreference--get-path">get_path</link></methodname>
<methodparam></methodparam>
</methodsynopsis>
<methodsynopsis language="python">
<methodname><link linkend="method-gtktreerowreference--get-model">get_model</link></methodname>
<methodparam></methodparam>
</methodsynopsis>
<methodsynopsis language="python">
<methodname><link linkend="method-gtktreerowreference--valid">valid</link></methodname>
<methodparam></methodparam>
</methodsynopsis>
<methodsynopsis language="python">
<methodname><link linkend="method-gtktreerowreference--copy">copy</link></methodname>
<methodparam></methodparam>
</methodsynopsis>
<methodsynopsis language="python">
<methodname><link linkend="method-gtktreerowreference--free">free</link></methodname>
<methodparam></methodparam>
</methodsynopsis>
</classsynopsis>
</refsect1>
<refsect1>
<title>Description</title>
<note>
<para>This object is available in PyGTK 2.4 and above.</para>
</note>
<para>A <link
linkend="class-gtktreerowreference"><classname>gtk.TreeRowReference</classname></link>
is an object that points to a row in a <link
linkend="class-gtktreemodel"><classname>gtk.TreeModel</classname></link>
similar to a <link
linkend="class-gtktreeiter"><classname>gtk.TreeIter</classname></link>. A
<link
linkend="class-gtktreerowreference"><classname>gtk.TreeRowReference</classname></link>,
unlike a <link
linkend="class-gtktreeiter"><classname>gtk.TreeIter</classname></link>,
maintains a persistent reference in spite of changes in the model.</para>
</refsect1>
<refsect1 id="constructor-gtktreerowreference">
<title>Constructor</title>
<programlisting><constructorsynopsis language="python">
<methodname>gtk.TreeRowReference</methodname>
<methodparam><parameter role="keyword">model</parameter></methodparam>
<methodparam><parameter role="keyword">path</parameter></methodparam>
</constructorsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><parameter role="keyword">model</parameter> :</term>
<listitem><simpara>a <link
linkend="class-gtktreemodel"><classname>gtk.TreeModel</classname></link></simpara></listitem>
</varlistentry>
<varlistentry>
<term><parameter role="keyword">path</parameter> :</term>
<listitem><simpara>a valid tree path to monitor</simpara></listitem>
</varlistentry>
<varlistentry>
<term><emphasis>Returns</emphasis> :</term>
<listitem><simpara>a <link
linkend="class-gtktreerowreference"><classname>gtk.TreeRowReference</classname></link>,
or <literal>None</literal></simpara></listitem>
</varlistentry>
</variablelist>
<note>
<para>This constructor is available in PyGTK 2.4 and above.</para>
</note>
<para>Creates a row reference pointing to the treemodel row specified by
<parameter>model</parameter> and <parameter>path</parameter>. This reference
will continue pointing to the node in spite of changes in
<parameter>model</parameter>. It listens to all signals emitted by
<parameter>model</parameter>, and updates its path appropriately. If
<parameter>path</parameter> isn't a valid path in
<parameter>model</parameter>, <literal>None</literal> is returned.</para>
</refsect1>
<refsect1>
<title>Methods</title>
<refsect2 id="method-gtktreerowreference--get-path">
<title>gtk.TreeRowReference.get_path</title>
<programlisting><methodsynopsis language="python">
<methodname>get_path</methodname>
<methodparam></methodparam>
</methodsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><emphasis>Returns</emphasis> :</term>
<listitem><simpara>A current path, or
<literal>None</literal>.</simpara></listitem>
</varlistentry>
</variablelist>
<note>
<para>This method is available in PyGTK 2.4 and above.</para>
</note>
<para>The <methodname>get_path</methodname>() method returns the path
that the row reference currently points to, or <literal>None</literal> if
the path pointed to is no longer valid.</para>
</refsect2>
<refsect2 id="method-gtktreerowreference--get-model">
<title>gtk.TreeRowReference.get_model</title>
<programlisting><methodsynopsis language="python">
<methodname>get_model</methodname>
<methodparam></methodparam>
</methodsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><emphasis>Returns</emphasis> :</term>
<listitem><simpara>the model, or
<literal>None</literal>.</simpara></listitem>
</varlistentry>
</variablelist>
<note>
<para>This method is available in PyGTK 2.8 and above.</para>
</note>
<para>The <methodname>get_model</methodname>() method returns the
model that the row reference currently monitors, or <literal>None</literal>
if the model is not set.</para>
</refsect2>
<refsect2 id="method-gtktreerowreference--valid">
<title>gtk.TreeRowReference.valid</title>
<programlisting><methodsynopsis language="python">
<methodname>valid</methodname>
<methodparam></methodparam>
</methodsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><emphasis>Returns</emphasis> :</term>
<listitem><simpara><literal>True</literal> if the row reference
points to a valid path.</simpara></listitem>
</varlistentry>
</variablelist>
<note>
<para>This method is available in PyGTK 2.4 and above.</para>
</note>
<para>The <methodname>valid</methodname>() method returns
<literal>True</literal> if the row reference is not <literal>None</literal>
and refers to a current valid path.</para>
</refsect2>
<refsect2 id="method-gtktreerowreference--copy">
<title>gtk.TreeRowReference.copy</title>
<programlisting><methodsynopsis language="python">
<methodname>copy</methodname>
<methodparam></methodparam>
</methodsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><emphasis>Returns</emphasis> :</term>
<listitem><simpara>a copy of the row reference</simpara></listitem>
</varlistentry>
</variablelist>
<note>
<para>This method is available in PyGTK 2.4 and above.</para>
</note>
<para>The <methodname>copy</methodname>() method returns a copy of the
tree row reference.</para>
</refsect2>
<refsect2 id="method-gtktreerowreference--free">
<title>gtk.TreeRowReference.free</title>
<programlisting><methodsynopsis language="python">
<methodname>free</methodname>
<methodparam></methodparam>
</methodsynopsis></programlisting>
<note>
<para>This method is available in PyGTK 2.4 and above.</para>
</note>
<warning>
<para>This method is deprecated and should not be used since it may
crash your application.</para>
</warning>
<para>The free() method frees the tree row reference. The row
reference may be <literal>None</literal>.</para>
</refsect2>
</refsect1>
</refentry>
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