Martin, the following is the code for the country dropdown list, which can
control the state dropdown list. The problem is that when the country list's
value is switched to "null" from a selected country (say, USA), then the state
dropdown list does not update. In addition, Wicket in the backend has the
following message. Another puzzling thing to me is that my FeedbackPanel is
there as defined below.
------- message --------
18:38:20,890 WARN WebSession:193 - Component-targetted feedback message was
left unrendered. This could be because you
are missing a FeedbackPanel on the page. Message: [FeedbackMessage message =
"Field 'Country' is required.", reporter =
country, level = ERROR]
------- dropdown list code -------
List<Country> countryList = objectService.findAllCountries();
DropDownChoice countryDDC = new DropDownChoice("country",
countryList,
new ChoiceRenderer("name", "id") );
countryDDC.setRequired(true);
countryDDC.add(new AjaxFormComponentUpdatingBehavior("onchange") {
protected void onUpdate(AjaxRequestTarget target) {
if (target != null) {
MyUser u = f.getModelObject();
u.setState(null);
DropDownChoice stateDDC = (DropDownChoice) f.get("state");
stateDDC.setChoices(objectService.findStatesByCountry(f.getModelObject().getCountry()));
target.addComponent(stateDDC);
}
}
});
f.add(new FormComponentFeedbackBorder("borderCountry").add(countryDDC));
------ FeedbackPanel code --------
add(new FeedbackPanel("feedbackHolder") {
@Override
public boolean isVisible() {
return true;//anyMessage();
}
}.setOutputMarkupId(true));
--- 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, 11:50 AM
> 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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> >>
> >
> >
> >
> >
> >
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