Question

I have a page that has a status text label and a panel doing some DB query. since the query can take some time I am loading it using

add(new AjaxLazyLoadPanel("resultPanel")
{
    @Override
public Component getLazyLoadComponent(String id) {
        return new SearchResultPanel(id);
    }
};

which works very well.

My question is how to update the status label which is outside of the resultPanel, to show the number of search results?

I was thinking along the lines of addComonent(target) but I don’t have a target? am i off the track?

Answer 1

Well the SearchResultPanel might look like this:

public class SearchResultPanel extends Panel implements IHeaderContributor{
   public SearchResultPanel(String id){
      super(id);
      ....
   }
   public void renderHead(IHeaderResponse response){
      response.renderOnDomReadyJavascript("alert('hello');");
   }
}

Now when it is loaded it should throw out that javascript. Another way answered on stackoverflow previously (though I do not like it) is to use an AjaxSelfUpdatingTimerBehavior, which unless the javascript should be ran more then once I do not like, and still it is less elegant in my opinion.

Look here for their answer: Wicket: reload AjaxLazyLoadPanel automatically