Galera gostaria de saber como eu monto um menu no estilo de Arvore com os sinas de + e sub itens usando Ice Faces estou fazendo como esta abaixo mais não sei como eu faço para aparecer os sinas de + no menu
alguém pode ajudar
<?xml version="1.0" encoding="ISO-8859-1"?>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:ice="http://www.icesoft.com/icefaces/component">
<body>
<h:form>
<ice:menuBar orientation="vertical">
<ice:menuItem value="File">
<ice:menuItem value="Open" icon="file_open.gif" actionListener="#{menuBean.menuActionListener}" />
<ice:menuItem value="Close" icon="file_close.gif" actionListener="#{menuBean.menuActionListener}" />
<ice:menuItemSeparator/>
<ice:menuItem value="Recent">
<ice:menuItem icon="xmlhttp/css/xp/css-images/document.gif" value="File 1"/>
<ice:menuItem icon="xmlhttp/css/xp/css-images/document.gif" value="File 2">
<ice:menuItem icon="xmlhttp/css/xp/css-images/paragraph.gif" value="Para 1" actionListener="#{menuBean.menuActionListener}" />
<ice:menuItem icon="xmlhttp/css/xp/css-images/paragraph.gif" value="Para 2" action="#{menuBean.menuAction}" />
</ice:menuItem>
<ice:menuItem value="File 3" icon="xmlhttp/css/xp/css-images/document.gif">
<ice:menuItem icon="xmlhttp/css/xp/css-images/paragraph.gif" value="Para 1"/>
<ice:menuItem icon="xmlhttp/css/xp/css-images/paragraph.gif" value="Para 2"/>
<ice:menuItem icon="xmlhttp/css/xp/css-images/paragraph.gif" value="Para 3"/>
</ice:menuItem>
</ice:menuItem>
</ice:menuItem>
<ice:menuItem value="Edit">
<ice:menuItem value="Cut" icon="xmlhttp/css/xp/css-images/cut.gif" action="#{menuBean.menuActionCut}"/>
<ice:menuItem value="Copy" icon="xmlhttp/css/xp/css-images/copy.gif" action="#{menuBean.menuActionCopy}"/>
<ice:menuItem value="Paste" icon="xmlhttp/css/xp/css-images/paste.gif" action="#{menuBean.menuActionPaste}"/>
</ice:menuItem>
<ice:menuItem value="View">
<ice:menuItem value="toolbar" />
<ice:menuItem value="statusbar" />
<ice:menuItem value="custom" />
</ice:menuItem>
</ice:menuBar>
</h:form>
</body>
</html>