Wicket Checkbox Attributeappender

In a code that I am working on there is a normal(no ajax) checkbox to which I want to append the JavaScript onchange event to it like: checkbox.add(new AttributeAppender('onchange'

Solution 1:

May be you can call your func(this); function as a AjaxEventBehavior. getPreconditionScript() or getSuccessScript(), instead of adding and AttributeAppender on the onchange event.

Take a look at http://wicket.apache.org/apidocs/1.5/org/apache/wicket/ajax/AbstractDefaultAjaxBehavior.html#getPreconditionScript()

Your AjaxEventBehavior will look similar to this:

new AjaxEventBehavior("onclick") {

     protectedvoidonEvent(AjaxRequestTarget target) {
             System.out.println("ajax here!");
     }

     protected CharSequence getSuccessScript() {
             return"func(this);";
     }
}

Solution 2:

Regarding my comments on the other answer, here is what I suggest using an AjaxCallDecorator

newAjaxEventBehavior('onclick'){
    protectedvoidonEvent(AjaxRequestTarget target) {
      //call your onclick handling logic here
    }

    protected IAjaxCallDecorator getAjaxCallDecorator(){
      returnnewIAjaxCallDecorator(){
         publicCharSequencedecorateScript(Component component,
                        CharSequence script){
            //prepend your javascript call to ajax server callreturn"func(this);"+script;
         }
         publicCharSequencedecorateOnSuccessScript(Component component,
                                 CharSequence script){
            return script;
         }
         publicCharSequencedecorateOnFailureScript(Component component,
                                 CharSequence script){
            return script;
         }
      };
    }
}