<?xml version="1.0" encoding="UTF-8"?>
<chapter>
  <chapterinfo>
    <keywordset>
      <keyword>rich:changeExpandListener</keyword>
    </keywordset>
  </chapterinfo>
     <table>
	  <title>Component identification parameters </title>
      <tgroup cols="2">
	  <thead>
            <row>
                  <entry>Name</entry>
                  <entry>Value</entry>
            </row>
        </thead>
        <tbody>
		
          <row>
            <entry>listener-class</entry>
            <entry>org.richfaces.event.NodeExpandedListener</entry>
          </row>
		  <row>
            <entry>event-class</entry>
            <entry>org.richfaces.event.NodeExpandedEvent</entry>
          </row>
          
          <row>
            <entry>tag-class</entry>
            <entry>org.richfaces.taglib.ChangeExpandListenerTag</entry>
          </row>
		  
        </tbody>
      </tgroup>
    </table>
	
  <section>
    <title>Creating the Component with a Page Tag</title>
    <para>To create the simplest variant on a page use the following syntax:</para>

  <para>
      <emphasis role="bold">Example:</emphasis>
 </para>

	<programlisting role="XML"><![CDATA[...
<rich:changeExpandListener type="demo.Bean"/>
...
]]></programlisting> 
  </section>
  
  <section>
    <title>Creating the Component Dynamically Using Java</title>
	  <para>
		  <emphasis role="bold">Example:</emphasis></para>		
	  <programlisting role="JAVA"><![CDATA[package demo;
public class ImplBean implements org.richfaces.event.NodeExpandedListener{
	...
}
]]></programlisting>

	  <programlisting role="JAVA"><![CDATA[import demo.ImplBean;
...
ImplBean myListener = new ImplBean();
...
]]></programlisting>
		
  </section>

  <section>
    <title>Details of Usage</title>

<para>
  The <emphasis role="bold"><property>&lt;rich:changeExpandListener&gt;</property></emphasis> is used as a nested tag with <emphasis role="bold"><property>&lt;rich:tree&gt;</property></emphasis>
  and <emphasis role="bold"><property>&lt;rich:treeNode&gt;</property></emphasis> components.
</para>
<para>
Attribute <emphasis><property>&quot;type&quot;</property></emphasis> defines the fully qualified Java class name for the listener.
  This class should implement <ulink url="&apidoc_framework;/org/richfaces/event/TreeListenerEventsProducer.html#addChangeExpandListener(org.richfaces.event.NodeExpandedListener)"><code>org.richfaces.event.NodeExpandedListener</code></ulink>interface.
</para>
	
  <para>
      <emphasis role="bold">The typical variant of using:</emphasis>
 </para>

    <programlisting role="XML"><![CDATA[...
<rich:tree switchType="server" value="#{project.data}" var="item" nodeFace="#{item.type}">
	<rich:changeExpandListener type="demo.ListenerBean"/>
	...
	<!-- Tree nodes -->	
	...
</rich:tree>
...
]]></programlisting> 

  <para>
      <emphasis role="bold">Java bean source:</emphasis>
 </para>

    <programlisting role="JAVA"><![CDATA[package demo;
import org.richfaces.event.NodeExpandedEvent;
public class ListenerBean implements org.richfaces.event.NodeExpandedListener{
    ...	
	public void processExpansion(NodeExpandedEvent arg0){
		//Custom Developer Code 
	}
    ...
}
...]]></programlisting> 
  </section>  
  
  <section>
    <title>Look-and-Feel Customization</title>
    
    <para><emphasis role="bold">
      <property>&lt;rich:changeExpandListener&gt;</property>
    </emphasis> has no skin parameters and custom <property>style classes</property>, as the
      component isn&apos;t visual.</para>
  </section>

    
</chapter>