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.
> >
> > What can I do to make Wicket the way I want?
> >
> > Thanks!
>
>
>
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