Code?

2010/3/18 David Chang <david_q_zh...@yahoo.com>:
> Martin, thanks for chimining in. I already did that. The problem is when I 
> select "null" (choose one), AjaxFormComponentUpdatingBehavior#onUpdate is not 
> called. Instead, Wicket generates a message and tries to seed it 
> FeedbackPanel. I want to be able to handle that "null" and set another 
> dropdown list blank.
>
> Regards.
>
> --- On Thu, 3/18/10, Martin Makundi <martin.maku...@koodaripalvelut.com> 
> wrote:
>
>> From: Martin Makundi <martin.maku...@koodaripalvelut.com>
>> Subject: Re: Select the "Choose one" of a required DropDownChoice
>> To: users@wicket.apache.org
>> Date: Thursday, March 18, 2010, 10:58 AM
>> setNullValid
>>
>> 2010/3/18 David Chang <david_q_zh...@yahoo.com>:
>> > In my case, the field is required. I make it required
>> by setRequired(true), but I want the blank/choose one is
>> still there.
>> >
>> > Doable?
>> >
>> >
>> > --- On Thu, 3/18/10, Matthias Keller <matthias.kel...@ergon.ch>
>> wrote:
>> >
>> >> From: Matthias Keller <matthias.kel...@ergon.ch>
>> >> Subject: Re: Select the "Choose one" of a required
>> DropDownChoice
>> >> To: users@wicket.apache.org
>> >> Date: Thursday, March 18, 2010, 9:42 AM
>> >> Hi
>> >>
>> >> Yes, exactly, but why do you have it set to
>> required at all
>> >> in first
>> >> place if you want to allow the empty selection
>> too?
>> >> I dont think a DropDownChoice is required by
>> default but if
>> >> it is, try
>> >> setRequired(false) ...
>> >>
>> >> Matt
>> >>
>> >> On 2010-03-18 14:36, David Chang wrote:
>> >> > Matt, I already did that.
>> >> >
>> >> > DropDownChoice.setNullValid() makes "Choose
>> one"
>> >> always stay there.
>> >> > I notice that DropDownChoice.setRequired() is
>> the
>> >> reason to generate the message and not get
>> onUpdate called.
>> >> >
>> >> > Thanks.
>> >> >
>> >> >
>> >> > --- On Thu, 3/18/10, Matthias Keller<matthias.kel...@ergon.ch>
>> >> wrote:
>> >> >
>> >> >
>> >> >> From: Matthias Keller<matthias.kel...@ergon.ch>
>> >> >> Subject: Re: Select the "Choose one" of a
>> required
>> >> DropDownChoice
>> >> >> To: users@wicket.apache.org
>> >> >> Date: Thursday, March 18, 2010, 9:30 AM
>> >> >> Hi
>> >> >>
>> >> >> Have a look at
>> DropDownChoice.setNullValid() and
>> >> >> .setRequired()
>> >> >>
>> >> >> Matt
>> >> >>
>> >> >> On 2010-03-18 14:26, David Chang wrote:
>> >> >>
>> >> >>> Hi, I am new in Wicket and am playing
>> with
>> >> different
>> >> >>>
>> >> >> components.
>> >> >>
>> >> >>> I have a two dropdown lists. One is a
>> list of
>> >> >>>
>> >> >> countries, required field, controlling
>> another
>> >> list of
>> >> >> states/provinces via
>> >> AjaxFormComponentUpdatingBehavior.
>> >> >>
>> >> >>> The country list always has a blank
>> >> (equivalent of
>> >> >>>
>> >> >> "Choose one") as the first option in the
>> list.
>> >> When I select
>> >> >> different countries, the state/province
>> list
>> >> changes
>> >> >> accordingly. However, when I change to
>> the blank
>> >> in the
>> >> >> country list, the state list stops
>> updating. I
>> >> looked into
>> >> >> it and found out that in this situation
>> (required
>> >> droopdown
>> >> >> list) selecting blank makes Wicket issue
>> a
>> >> feedback message
>> >> >> instead of calling
>> >> >>
>> AjaxFormComponentUpdatingBehavior#onUpdate, which
>> >> is what I
>> >> >> want.
>> >> >>
>> >> >>
>> >>
>> >>
>> >>
>> >
>> >
>> >
>> >
>> >
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>> >
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