Calling Wicket from Javascript,

I needed to call into Wicket code from a jQuery function. Building on the sample code from Calling Wicket from Javascript, I created an end-to-end working example. In my case I wanted to manipulate a row in my data table when a user clicked a jQuery widget in that row. I needed to pass the markup id from the widget to the Wicket handler. In my case, My item type is DefaultMutableTreeNode. Note that contrary to what the wiki page says, I did not need to put a script tag in my html code.

MyDataView.java

@Override
protected void populateItem(final Item<DefaultMutableTreeNode> item)
{
 super.populateItem(item);
 // Important!!
 item.setOutputMarkupId(true);
 ...
}

MyDataPanel.java

public class MyDataPanel extends DataPanel
{

 public MyDataPanel(String id, final HtDataView dataView,
   WebPage parent)
 {
  ...

  final AbstractDefaultAjaxBehavior behave = new AbstractDefaultAjaxBehavior()
  {
   private static final long serialVersionUID = 1L;

   @Override
   protected void respond(final AjaxRequestTarget target)
   {
    final String paramMarkupId = RequestCycle.get().getRequest().getParameter("markupId");
    MyDataPanel.this.visitChildren(Item.class,
    new Component.IVisitor<Item<DefaultMutableTreeNode>>()
    {
     public Object component(Item<DefaultMutableTreeNode> item)
     {
      if (StringUtils.equals(paramMarkupId, item.getMarkupId()))
      {
       ...your code here...
      }
      return STOP_TRAVERSAL;
     }
    });
   }
  };
  parent.add(behave);
  final CharSequence url = behave.getCallbackUrl();
  add(new AbstractBehavior()
  {
   private static final long serialVersionUID = 1L;

   @Override
   public void renderHead(IHeaderResponse response)
   {
    String js = "function callWicket(markupId) { var wcall = wicketAjaxGet ('"
    + url + "&markupId='+markupId, function() { }, function() { } ) }";
    response.renderJavascript(js, "myScript");
   }
  });
... 

MyJQueryStuff.js

$.fn.toggleBranch = function() {
... 
     var idAttr = $(this).attr("id");
   callWicket(idAttr);
...