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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