Add AJAX behaviour to embedded custom form component

[Gianni Doe <gd...@yahoo.it>]

I've developed a custom form component (FormComponentPanel), a date  
picker, that makes use of 2 fields - a display TextField and a  
HiddenField for the model data. I'm then adding this to the page with  
a span tag:
<span wicket:id="dropoffDate">[dropoff date picker]</span>

Then in the java :
DatePicker  dropoffDatePicker = new DatePicker("dropoffDate", new  
PropertyModel<LocalDate>(this, "dropoffDate"),
                 (new LocalDate()).minusDays(0), (new  
LocalDate()).plusYears(3));

I'm after some advice on the best way to attach an AJAX behaviour to  
the component. If for example I add an AJAX behaviour directly to the  
date picker component then it's attached to the span tag and obviously  
doesn't work. The only way I've found to get around this is to expose  
the date display field with a public getter so I can then attach the  
onchange event.

dropoffDatePicker.getDateDisplayField().add(new  
AjaxFormComponentUpdatingBehavior("onchange") {
             @Override
             protected void onUpdate(AjaxRequestTarget target) {
                 ......
             }
});

Any suggestions for a better way to do this that doesn't involve  
exposing the innards?
-Gianni


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Re: Add AJAX behaviour to embedded custom form component

[Igor Vaynberg <ig...@gmail.com>]

a better way is to have a factory method for the internal components,
that way the user can do

component newcomponent(string id, imodel model) {
  component c=super.newcomponent(id, model);
  c.add(whateverbehavior);
  return c;
}

-igor

On Mon, Nov 3, 2008 at 6:02 AM, Gianni Doe <gd...@yahoo.it> wrote:
> I've developed a custom form component (FormComponentPanel), a date picker,
> that makes use of 2 fields - a display TextField and a HiddenField for the
> model data. I'm then adding this to the page with a span tag:
> <span wicket:id="dropoffDate">[dropoff date picker]</span>
>
> Then in the java :
> DatePicker  dropoffDatePicker = new DatePicker("dropoffDate", new
> PropertyModel<LocalDate>(this, "dropoffDate"),
>                (new LocalDate()).minusDays(0), (new
> LocalDate()).plusYears(3));
>
> I'm after some advice on the best way to attach an AJAX behaviour to the
> component. If for example I add an AJAX behaviour directly to the date
> picker component then it's attached to the span tag and obviously doesn't
> work. The only way I've found to get around this is to expose the date
> display field with a public getter so I can then attach the onchange event.
>
> dropoffDatePicker.getDateDisplayField().add(new
> AjaxFormComponentUpdatingBehavior("onchange") {
>            @Override
>            protected void onUpdate(AjaxRequestTarget target) {
>                ......
>            }
> });
>
> Any suggestions for a better way to do this that doesn't involve exposing
> the innards?
> -Gianni
>
>
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> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
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>

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