Martin,
I tried your approach it will not be working for me. Because I am going to add
other required fields before or after the two dropdown list. Using
AjaxFormSubmitBehavior would likely cause validation errors all the time.
Besides, AjaxFormComponentUpdatingBehavior should be what I need: redraw part
of a web page via Ajax without submitting a form.
Thank YOU for your help!
All the best,
David
--- On Mon, 3/22/10, Martin Makundi <martin.maku...@koodaripalvelut.com> wrote:
> From: Martin Makundi <martin.maku...@koodaripalvelut.com>
> Subject: Re: Ajax has too much control?
> To: users@wicket.apache.org
> Date: Monday, March 22, 2010, 10:52 AM
> Hi!
>
> If you redraw something, you need to submit the form
> values, otherwise
> the redrawn state is different... if that's your case.
>
> **
> Martin
>
> 2010/3/22 David Chang <david_q_zh...@yahoo.com>:
> >
> > Hello Martin,
> >
> > Thanks for your input and sharing your code! I will
> give it a try.
> >
> > Did you have the same problem I have now?
> >
> > Here is what I have for the Country DDC:
> >
> > countryDDC.add(new
> AjaxFormComponentUpdatingBehavior("onchange") {
> > @Override
> > protected void onUpdate(AjaxRequestTarget target)
> {
> > if (target != null) {
> > MyUser u = form.getModelObject();
> > u.setState(null);
> > DropDownChoice stateDDC = (DropDownChoice)
> form.get("state");
> >
> stateDDC.setChoices(objectService.findStatesForLocale(getSession().getLocale()));
> > target.addComponent(countryDDC);
> > target.addComponent(stateDDC);
> > }
> > }
> > });
> >
> >
> > As you can see, I am using
> AjaxFormComponentUpdatingBehavior. Why do you use
> AjaxFormSubmitBehavior? In my case, I am not submitting a
> form.
> >
> > I am new in Wicket. Thanks for your help!
> >
> > Best.
> > -David
> >
> >
> >
> >
> >
> > --- On Sun, 3/21/10, Martin Makundi <martin.maku...@koodaripalvelut.com>
> wrote:
> >
> >> From: Martin Makundi <martin.maku...@koodaripalvelut.com>
> >> Subject: Re: Ajax has too much control?
> >> To: users@wicket.apache.org
> >> Date: Sunday, March 21, 2010, 11:38 AM
> >> Hi David!
> >>
> >> Maybe you need this (at least this is what worked
> for me):
> >>
> >> /**
> >> * @author Martin
> >> */
> >> public abstract class
> >> AjaxFormSubmittingChangeListenerBehavior extends
> >> AjaxFormSubmitBehavior {
> >> private final static Method hiddenFieldGetter;
> >> static {
> >> try {
> >> hiddenFieldGetter =
> >> Form.class.getDeclaredMethod("getHiddenFieldId");
> >>
> >> hiddenFieldGetter.setAccessible(true);
> >> } catch (Exception e) {
> >> throw new RuntimeException(e);
> >> }
> >> }
> >>
> >> /**
> >> * @see
> >>
> org.apache.wicket.ajax.AbstractDefaultAjaxBehavior#onBind()
> >> */
> >> @Override
> >> protected void onBind() {
> >> super.onBind();
> >>
> >> if (!(getComponent() instanceof
> >> IOnChangeListener))
> >> {
> >> throw new
> >> WicketRuntimeException("Behavior " +
> getClass().getName() +
> >> " can only be added to an
> >> instance of a IOnChangeListener");
> >> }
> >> }
> >>
> >> /**
> >> * @param event
> >> */
> >> public
> >> AjaxFormSubmittingChangeListenerBehavior(String
> event) {
> >> super(event);
> >> }
> >>
> >> /**
> >> * @see
> >>
> org.apache.wicket.ajax.form.AjaxFormSubmitBehavior#onError(org.apache.wicket.ajax.AjaxRequestTarget)
> >> */
> >> @Override
> >> protected void onError(AjaxRequestTarget
> target) {
> >> onSubmit(target);
> >> }
> >>
> >> /**
> >> * @see
> >>
> org.apache.wicket.ajax.form.AjaxFormSubmitBehavior#onEvent(org.apache.wicket.ajax.AjaxRequestTarget)
> >> */
> >> @Override
> >> protected void onEvent(AjaxRequestTarget
> target) {
> >> HttpServletRequest httpServletRequest =
> >> ((WebRequest) getComponent()
> >>
> >> .getRequest()).getHttpServletRequest();
> >>
> >> Map parameters;
> >>
> >> if (httpServletRequest instanceof
> >> MockHttpServletRequest) {
> >> parameters =
> >> ((MockHttpServletRequest)
> >> httpServletRequest).getParameterMap();
> >> } else {
> >> parameters =
> >> ((org.mortbay.jetty.Request)
> >> httpServletRequest).getParameters();
> >> }
> >>
> >> parameters.put(getHiddenFieldId(getForm()),
> >>
> getComponent().urlFor(IOnChangeListener.INTERFACE));
> >>
> >> final FormComponent<?> formComponent
> =
> >> (FormComponent<?>) getComponent();
> >>
> >> try {
> >> if (isUpdateModel()) {
> >> formComponent.inputChanged();
> >> formComponent.validate();
> >>
> >> if
> >> (!formComponent.hasErrorMessage()) {
> >> formComponent.valid();
> >>
> >> formComponent.updateModel();
> >> }
> >> }
> >>
> >> super.onEvent(target);
> >> } catch (RuntimeException e) {
> >>
> >>
> Utils.errorLog(AjaxFormSubmittingChangeListenerBehavior.class,
> >> e);
> >> onError(target);
> >> }
> >> }
> >>
> >> /**
> >> * @return boolean
> >> */
> >> protected boolean isUpdateModel() {
> >> return true;
> >> }
> >>
> >> /**
> >> * @param form
> >> * @return String
> >> */
> >> private String getHiddenFieldId(Form<?>
> form)
> >> {
> >> try {
> >> Form<?> root =
> >> form.getRootForm();
> >> return (String)
> >> hiddenFieldGetter.invoke(root);
> >> } catch (Exception e) {
> >> throw new RuntimeException(e);
> >> }
> >> }
> >> }
> >>
> >>
> >> public abstract class
> >>
> AjaxFormSubmittingChangeListenerDropDownChoice<T>
> >> extends
> >> DropDownChoice<T> {
> >> /** Initialize */ {
> >> add(new
> >>
> AjaxFormSubmittingChangeListenerBehavior(JavaScriptConstants.ONCHANGE)
> >> {
> >> @Override
> >> protected void
> >> onSubmit(AjaxRequestTarget target) {
> >>
> >>
> AjaxFormSubmittingChangeListenerDropDownChoice.this.onSubmit(target);
> >> }
> >> });
> >> }
> >>
> >> /**
> >> * @see
> >> org.apache.wicket.MarkupContainer#toString()
> >> */
> >> @Override
> >> public String toString() {
> >> return super.toString() + " Value: " +
> >> getValue();
> >> }
> >>
> >> /**
> >> * @param id
> >> * @param choices
> >> * @param renderer
> >> */
> >> public
> >>
> AjaxFormSubmittingChangeListenerDropDownChoice(String id,
> >> IModel<List<? extends T>>
> >> choices, IChoiceRenderer<T> renderer) {
> >> super(id, choices, renderer);
> >> }
> >>
> >> /**
> >> * @param target
> >> */
> >> protected abstract void
> onSubmit(AjaxRequestTarget
> >> target);
> >>
> >> /**
> >> * @param target
> >> */
> >> protected void onError(AjaxRequestTarget
> target) {
> >> onSubmit(target);
> >> }
> >>
> >> /**
> >> * @param id
> >> * @param choices
> >> */
> >> public
> >>
> AjaxFormSubmittingChangeListenerDropDownChoice(String id,
> >> IModel<List<? extends T>>
> >> choices) {
> >> super(id, choices);
> >> }
> >>
> >> /**
> >> * @param id
> >> * @param model
> >> * @param choices
> >> * @param renderer
> >> */
> >> public
> >>
> AjaxFormSubmittingChangeListenerDropDownChoice(String id,
> >> IModel<T> model,
> >> IModel<List<? extends T>>
> >> choices, IChoiceRenderer<T> renderer) {
> >> super(id, model, choices, renderer);
> >> }
> >>
> >> /**
> >> * @param id
> >> * @param model
> >> * @param choices
> >> */
> >> public
> >>
> AjaxFormSubmittingChangeListenerDropDownChoice(String id,
> >> IModel<T> model,
> >> IModel<List<? extends T>>
> >> choices) {
> >> super(id, model, choices);
> >> }
> >>
> >> /**
> >> * @param id
> >> * @param model
> >> * @param data
> >> * @param renderer
> >> */
> >> public
> >>
> AjaxFormSubmittingChangeListenerDropDownChoice(String id,
> >> IModel<T> model,
> >> List<? extends T> data,
> >> IChoiceRenderer<T> renderer) {
> >> super(id, model, data, renderer);
> >> }
> >>
> >> /**
> >> * @param id
> >> * @param model
> >> * @param choices
> >> */
> >> public
> >>
> AjaxFormSubmittingChangeListenerDropDownChoice(String id,
> >> IModel<T> model,
> >> List<? extends T> choices) {
> >> super(id, model, choices);
> >> }
> >>
> >> /**
> >> * @param id
> >> * @param data
> >> * @param renderer
> >> */
> >> public
> >>
> AjaxFormSubmittingChangeListenerDropDownChoice(String id,
> >> List<? extends T> data,
> >> IChoiceRenderer<T> renderer) {
> >> super(id, data, renderer);
> >> }
> >>
> >> /**
> >> * @param id
> >> * @param choices
> >> */
> >> public
> >>
> AjaxFormSubmittingChangeListenerDropDownChoice(String id,
> >> List<? extends T> choices) {
> >> super(id, choices);
> >> }
> >>
> >> /**
> >> * @param id
> >> */
> >> public
> >>
> AjaxFormSubmittingChangeListenerDropDownChoice(String id) {
> >> super(id);
> >> }
> >> }
> >>
> >>
> >> **
> >> Martin
> >> 2010/3/21 Sven Meier <s...@meiers.net>:
> >> > David,
> >> >
> >> >>It seems that you do not understand the
> problem I
> >> have
> >> >
> >> > obviously not ;).
> >> >
> >> > A quickstart would help me to understand your
> problem
> >> better, but perhaps
> >> > others have already a clue?
> >> >
> >> > Sven
> >> >
> >> > David Chang wrote:
> >> >>
> >> >> Sven,
> >> >>
> >> >> Thanks for your input. It seems that you
> do not
> >> understand the problem I
> >> >> have (Wicket problem??? or my page
> problem???). I
> >> know how Ajax works by
> >> >> adding components to Ajax request
> target.
> >> >>
> >> >> When it is non-Ajax, my page runs
> correctly with
> >> all three controls. When
> >> >> Country DDC Ajax-controls State DDC, the
> two DDC
> >> works correctly. The
> >> >> problem is that once this Ajax control
> is
> >> triggered by selecting a value in
> >> >> Country DDC, the State DDC list is NOT
> updated
> >> when the Locale DDC value is
> >> >> changed.
> >> >>
> >> >> I have a feel that Wicket has a problem
> here. I am
> >> using Wicket 1.4.7.
> >> >>
> >> >> Regards.
> >> >> -David
> >> >>
> >> >>
> >> >>
> >> >> --- On Sun, 3/21/10, Sven Meier <s...@meiers.net>
> >> wrote:
> >> >>
> >> >>
> >> >>>
> >> >>> From: Sven Meier <s...@meiers.net>
> >> >>> Subject: Re: Ajax has too much
> control?
> >> >>> To: users@wicket.apache.org
> >> >>> Date: Sunday, March 21, 2010, 7:25
> AM
> >> >>> Hi David,
> >> >>>
> >> >>>
> >>
> DropDownChoice#wantOnSelectionChangedNotifications() will
> >> >>> trigger rendering of the complete
> page.
> >> >>> On Ajax request only those components
> are
> >> rendered you
> >> >>> explicitely 'add' to the request,
> see
> >> AjaxRequestTarget#addComponent().
> >> >>>
> >> >>> If you want to have the same for
> Ajax
> >> requests, you can
> >> >>> just 'add' the complete page.
> >> >>>
> >> >>> This is not very efficient though.
> >> >>>
> >> >>> Sven
> >> >>>
> >> >>> David Chang wrote:
> >> >>>
> >> >>>>
> >> >>>> Forgive me about this meaningless
> subject,
> >> but I
> >> >>>>
> >> >>>
> >> >>> cannot think of a better one.
> >> >>>
> >> >>>>
> >> >>>> I have been learning Wicket
> through the
> >> WIA book. I
> >> >>>>
> >> >>>
> >> >>> just found out something interesting
> to me.
> >> Not sure it is a
> >> >>> bug, design, or something I did
> wrong.
> >> >>>
> >> >>>>
> >> >>>> I have a page with three Wicket
> elements:
> >> >>>>
> >> >>>> 1. Locale selector through a
> >> DropDownChoice list. WIA
> >> >>>>
> >> >>>
> >> >>> has complete code about how this
> works and I
> >> copied the
> >> >>> solution into this page
> >> >>>
> >> >>>>
> >> >>>> 2. Country DropDownChoice, whose
> values
> >> change between
> >> >>>>
> >> >>>
> >> >>> English and Chinese depending on
> Locale DDC.
> >> >>>>
> >> >>>> 3. State DropDownChoice, whose
> values
> >> change between
> >> >>>>
> >> >>>
> >> >>> English and Chinese depending on
> Locale DDC.
> >> The values in
> >> >>> this DDC depends on the chosen value
> in
> >> Country DDC.
> >> >>>
> >> >>>>
> >> >>>> Here are the experiments
> >> >>>>
> >> >>>> Experiment#1.
> >> >>>>
> >> >>>> Country DDC does not control
> values in
> >> State DDC via
> >> >>>>
> >> >>>
> >> >>> Ajax and it has
> >> >>>>
> >> >>>> protected boolean
> >> >>>>
> >> >>>
> >> >>> wantOnSelectionChangedNotifications()
> {
> >> >>>
> >> >>>>
> >> >>>> return true;
> >> >>>> }
> >> >>>>
> >> >>>> Everything works like a charm,
> which
> >> means
> >> >>>> (1) when Country DDC value
> changes, State
> >> DDC changes
> >> >>>>
> >> >>>
> >> >>> accodingly.
> >> >>>
> >> >>>>
> >> >>>> (2) when Locale changes, both
> Country DDC
> >> and State
> >> >>>>
> >> >>>
> >> >>> DDC lists change display values
> accordingly
> >> (which means
> >> >>> both DDCs show a list of values in
> the same
> >> language).
> >> >>>
> >> >>>>
> >> >>>> Experiment#2.
> >> >>>>
> >> >>>> Country DDC controls values in
> State DDC
> >> via Ajax. In
> >> >>>>
> >> >>>
> >> >>> this case, when page is first loaded,
> I do not
> >> touch the
> >> >>> Country DDC or State DDC. I simply
> change
> >> locale value any
> >> >>> number of times, both Country DDC and
> State
> >> DDC lists change
> >> >>> correctly depending on the session
> locale.
> >> Here is the
> >> >>> strange thing. Then I change Country
> DDC
> >> value, State DDC
> >> >>> changes correctly. Since then,
> HOWEVER, if I
> >> change locale
> >> >>> values, ONLY Country DDC list
> changes
> >> correctly; State DDC
> >> >>> list is not updated. It seems Wicket
> decides
> >> that State DDC
> >> >>> is forever Aja-controlled by Country
> DDC
> >> only.
> >> >>>
> >> >>>>
> >> >>>> Not qure sure if this a bug,
> design, or I
> >> did
> >> >>>>
> >> >>>
> >> >>> something wrong.
> >> >>>
> >> >>>>
> >> >>>> Please let me if you have
> difficulty
> >> understanding the
> >> >>>>
> >> >>>
> >> >>> experiments.
> >> >>>
> >> >>>>
> >> >>>> Thanks for any info or help.
> >> >>>>
> >> >>>> Cheers!
> >> >>>>
> >> >>>>
> >> >>>>
> >> >>>>
> >> >>>>
> >> >>>>
> >> >>>
> >> >>>
> >>
> ---------------------------------------------------------------------
> >> >>>
> >> >>>>
> >> >>>> To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
> >> >>>> For additional commands, e-mail:
> users-h...@wicket.apache.org
> >> >>>>
> >> >>>>
> >> >>>>
> >> >>>
> >> >>>
> >>
> ---------------------------------------------------------------------
> >> >>> To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
> >> >>> For additional commands, e-mail: users-h...@wicket.apache.org
> >> >>>
> >> >>>
> >> >>>
> >> >>
> >> >>
> >> >>
> >> >>
> >>
> ---------------------------------------------------------------------
> >> >> To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
> >> >> For additional commands, e-mail: users-h...@wicket.apache.org
> >> >>
> >> >>
> >> >
> >> >
> >> >
> >>
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> >> > To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
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> >> >
> >> >
> >>
> >>
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> >>
> >>
> >
> >
> >
> >
> >
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