<?xml version='1.0' encoding='UTF-8'?>
<section>
<sectioninfo>
<keywordset>
<keyword>rich:columnGroup</keyword>
<keyword>HtmlColumnGroup</keyword>
</keywordset>
</sectioninfo>
     <table>
	  <title>Component identification parameters</title>
      <tgroup cols="2">
	  <thead>
            <row>
                  <entry>Name</entry>
                  <entry>Value</entry>
            </row>
        </thead>
        <tbody>
          <row>
            <entry>component-type</entry>
            <entry>org.richfaces.ColumnGroup</entry>
          </row>
          <row>
            <entry>component-class</entry>
            <entry>org.richfaces.component.html.HtmlColumnGroup</entry>
          </row>
          <row>
            <entry>component-family</entry>
            <entry>org.richfaces.ColumnGroup</entry>
          </row>
          <row>
            <entry>renderer-type</entry>
            <entry>org.richfaces.ColumnGroupRenderer</entry>
		  </row>
		  <row>
			<entry>tag-class</entry>
            <entry>org.richfaces.taglib.ColumnGroupTag</entry>
          </row>
        </tbody>
      </tgroup>
    </table>
    <section>
    <title>Creating the Component with a Page Tag</title>
    <para>To create the simplest variant of <property>columnGroup</property> on a page, use the following syntax:</para>

    <para>
      <emphasis role="bold">Example:</emphasis>
    </para>
    <programlisting role="XML"><![CDATA[...
    <rich:dataTable value="#{capitalsBean.capitals}" var="capitals" 
                        ajaxKeys="#{bean.ajaxSet}" binding="#{bean.tabe}" id="table">
        <!--...//Set of columns and header/footer facets-->
        <rich:column colspan="3">
            <f:facet name="header">State Flag</f:facet>
            <h:graphicImage value="#{cap.stateFlag}"/>
        </rich:column>
        <rich:columnGroup>
            <!--...//Set of columns and header/footer facets-->
        </rich:columnGroup>	
    </rich:dataTable>
...
]]></programlisting>
  </section>
  <section>
    <title>Creating the Component Dynamically Using Java</title>

    <para>
      <emphasis role="bold">Example:</emphasis>
    </para>
    <programlisting role="JAVA"><![CDATA[import org.richfaces.component.html.HtmlColumnGroup;
...	
HtmlColumnGroup myRow = new HtmlColumnGroup();
...
]]></programlisting>
  </section>
  <section>
    <title>Details of Usage</title>
      <para>The <emphasis role="bold"><property>&lt;rich:columnGroup&gt;</property></emphasis> component combines columns set wrapping them into the <emphasis role="bold"><property>&lt;tr&gt;</property></emphasis> element and outputting them
     into one row. Columns are combined in a group the same way as when the <emphasis ><property>&quot;breakBefore&quot;</property></emphasis> attribute is used for 
     columns to add a moving to the next rows, but the first variant is clearer from a source code. Hence, the 
     following simple examples are very same.</para>

    <para>
      <emphasis role="bold">Example:</emphasis>
    </para>
     <programlisting role="XML"><![CDATA[...
    <rich:dataTable value="#{capitalsBean.capitals}" var="cap" rows="5" id="sublist"> 
        <rich:column colspan="3">
            <f:facet name="header">State Flag</f:facet>
            <h:graphicImage value="#{cap.stateFlag}"/>
        </rich:column>
        <rich:columnGroup>
            <rich:column> 
                <h:outputText value="#{cap.state}"/>
            </rich:column>
            <rich:column >
                <h:outputText value="#{cap.name}"/>
            </rich:column>
            <rich:column >
                <h:outputText value="#{cap.timeZone}"/>
            </rich:column>
        </rich:columnGroup>	
    </rich:dataTable>
...
]]></programlisting>
<para>And representation without a grouping:</para>

    <para>
      <emphasis role="bold">Example:</emphasis>
    </para>
<programlisting role="XML"><![CDATA[...
    <rich:dataTable value="#{capitalsBean.capitals}" var="cap" rows="5" id="sublist"> 
        <rich:column colspan="3">
            <f:facet name="header">State Flag</f:facet>
            <h:graphicImage value="#{cap.stateFlag}"/>
        </rich:column>
        <rich:column breakBefore="true">...</rich:column>
        <rich:column >...</rich:column>
        <rich:column >...</rich:column>
    </rich:dataTable>
....
]]></programlisting>
<para>The result is:</para>
<figure>
        <title>Generated columnGroup component</title>
      <mediaobject> 
        <imageobject>
            <imagedata fileref="images/columngroup2.gif"/>
        </imageobject>
    </mediaobject>
    </figure>
    <para>It&apos;s also possible to use the component for output of complex headers in a table. For example adding
     of a complex header to a facet for the whole table looks the following way:</para>

    <para>
      <emphasis role="bold">Example:</emphasis>
    </para>
     <programlisting role="XML"><![CDATA[...
    <f:facet name="header">
        <rich:columnGroup>
            <rich:column rowspan="2">
                <h:outputText value="State Flag"/>
            </rich:column>
            <rich:column colspan="3">
                <h:outputText value="State Info"/>
            </rich:column>
            <rich:column breakBefore="true">
                <h:outputText value="State Name"/>
            </rich:column>
            <rich:column>
                <h:outputText value="State Capital"/>
            </rich:column>
            <rich:column>
                <h:outputText value="Time Zone"/>
            </rich:column>
        </rich:columnGroup>
    </f:facet>
...
]]></programlisting>
<para>Generated on a page as:</para>
<figure>
        <title>ColumnGroup with complex headers</title>
      <mediaobject> 
        <imageobject>
            <imagedata fileref="images/columngroup3.gif"/>
        </imageobject>
    </mediaobject>
    </figure>     
    </section>
    <section>
    <title>Look-and-Feel Customization</title>
        <para>For skinnability implementation the components use a <emphasis 
><property>style class redefinition method</property></emphasis>.</para>
    <para>Default style classes are mapped on <emphasis 
><property>skin parameters</property>.</emphasis></para>
	<para>To redefine appearance of all columnGroups at once, there are two ways:</para>
        <itemizedlist>
        <listitem>to redefine corresponding skin parameters</listitem>
        <listitem>to add <emphasis 
            ><property>style classes</property></emphasis> used by the columnGroup to your page style sheets</listitem>
         </itemizedlist>
	  </section>
    <section>
    <title>Definition custom style classes</title>
	       
	<para>To redefine an appearance of all <property>columnGroups</property> on a page, redefine the corresponding class in the 
	CSS file used with the page.</para>
	 <para>To redefine a style of a particular page, use component class attributes which list is the same 
	 as the columnGroup one and is known to you.</para>
	</section>
</section>