Re: Breadcrumbs

[Jason Lea]

Andy Engle wrote:

Hi all,

Is there any slick way of putting breadcrumbs into a web app with
Struts?  If so, what's the preferred way?
Thanks.

Andy

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I did this using tiles.  I have my tiles extending a base layout, then 
each sub-menu item extends the parent tile definition
eg
(first level)
<definition name=".main.admin" extends=".layout">
 ...
</definition>

(second level)
<definition name=".main.admin.workflow.list" extends=".main.admin">
 ...
</definition>
Now, for breadcrumbs I would define breadcrumb0 in the first level.  As 
the second level extends the first, breadcrumb0 will be included.  In 
the second level I define breadcrumb1

eg
<definition name=".main.admin" extends=".layout">
       <put name="title"  value="admin.title" />
       <put name="body"  value="/WEB-INF/jsp/tiles/admin/admin.jsp" />
       <putList name="breadcrumb0" >
           <item value="admin.menu"
               link="admin"
               tooltip="admin.title"
               classtype="org.apache.struts.tiles.beans.SimpleMenuItem" />
       </putList>
   </definition>
   <definition name=".main.admin.workflow.list" extends=".main.admin">
       <put name="title"  value="workflow.list.title" />
       <put name="body"  
value="/WEB-INF/jsp/tiles/admin/workflow/list.jsp" />
       <putList name="breadcrumb1" >
           <item value="workflow.menu"
               link="workflowlist"
               tooltip="workflow.title"
               classtype="org.apache.struts.tiles.beans.SimpleMenuItem" />
       </putList>      
   </definition>

I had originally wanted to just to be able to add an item to the 
breadcrumb list, but that is not possible in xml.  In my layout.jsp page 
I then use

<tiles:useAttribute name="breadcrumb0" ignore="true" />
<tiles:useAttribute name="breadcrumb1" ignore="true" />
<tiles:useAttribute name="breadcrumb2" ignore="true" />
      <!-- breadcrumbs -->
       <div class="breadcrumbs">
               <span class="breadcrumb mainnavitem"><html:link 
forward="homepage" titleKey="homepage.title"><bean:message 
key="homepage.menu" /></html:link></span>
       </c:forEach>

       <c:forEach items="${breadcrumb0}" var="crumb">
           <span class="breadcrumb mainnavitem"><bean:message 
key="breadcrumb.separator" /> <html:link forward="${crumb.link}" 
titleKey="${crumb.tooltip}"><bean:message key="${crumb.value}" 
/></html:link></span>
       </c:forEach>

       <c:forEach items="${breadcrumb1}" var="crumb">
           <span class="breadcrumb mainnavitem"><bean:message 
key="breadcrumb.separator" /> <html:link forward="${crumb.link}" 
titleKey="${crumb.tooltip}"><bean:message key="${crumb.value}" 
/></html:link></span>
       </c:forEach>

       <c:forEach items="${breadcrumb2}" var="crumb">
           <span class="breadcrumb mainnavitem"><bean:message 
key="breadcrumb.separator" /> <html:link forward="${crumb.link}" 
titleKey="${crumb.tooltip}"><bean:message key="${crumb.value}" 
/></html:link></span>
       </c:forEach>
       </div>
       <!-- end breadcrumbs -->

Hope that make somes sort of sense.  If not ask me a question and I will try to explain better.

--
Jason Lea


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