Question

I would like to add an AttributeAppender to a Component inside an AjaxEventBehavior using Apache Wicket. A Behavior has a getComponent() method but in the Constructor getComponent() obvioulsy returns null.

Now I pass the component to the Constructor of the AjaxEventBehavior and it’s working but is this a good way to achieve my goal..

Here’s what I’m doing:

AjaxTooltipBehavior:

public class AjaxTooltipBehavior extends AjaxEventBehavior {
      public AjaxTooltipBehaviour(String event, Component tooltippedComponent) {
           super(event);
           tooltippedComponent.add(new AttributeAppender("data-tooltip","wicketAjaxTooltip"));
      }    

      ...
}

And that’s the way I use it:

 ...
 final WebMarkupContainer icon = new WebMarkupContainer("icon"); //a tooltiped icon
 icon2.add(new AjaxTooltipBehaviour("mouseover",icon2)

I asked myself if there isn’t a way to add the AttributeAppender to the componet without passing the component to the AjaxTooltipBehavior.
Does anyone know if this is possible in wicket or if there are better solutions?
FYI: I’m using wicket 1.6.

Thanks in advance for your support!
Ronny

Answer 1

Generally you would override Behavior#onBind(Component), but this method is made final in AbstractAjaxBehavior. But it will call onBind() and you use getComponent() there:

@Override
protected void onBind() {
    super.onBind();
    getComponent().add(new AttributeAppender("data-tooltip","wicketAjaxTooltip"));
}