Cemal, very intuitive -- thanks for that.
On Sat, Feb 13, 2010 at 6:26 AM, Cemal Bayramoglu <
jweekend_for...@cabouge.com> wrote:
> Steven,
>
> Start with something like this:
>
> zipcodeField.add(new OnChangeAjaxBehavior() {
> @Override protected void onUpdate(AjaxRequestTarget target) {
> // do your stuff here
> }
> @Override protected IAjaxCallDecorator getAjaxCallDecorator() {
> return new AjaxCallDecorator() {
> @Override public CharSequence decorateScript(CharSequence
> script) {
> return "if(this.value.length % 5 == 0){" + script + "}";
> }
> };
> }
> });
>
> Regards - Cemal
> jWeekend
> OO & Java Technologies, Wicket
> Consulting, Development, Training
> http://jWeekend.com
>
>
> On 12 February 2010 20:45, Steven Haines <lyg...@yahoo.com> wrote:
> > Hi,
> >
> > I
> > would like to add AJAX behavior to an application that sends an update
> > to my application after a certain number of characters have been typed.
> > For example, if the user is entering a zipcode, I would like a callback
> > to my application to be made after the user enters the fifth character.
> >
> > I've
> > written code using OnChangeAjaxBehavior that sends messages back to my
> > application after every character has been typed, such as the following:
> >
> > final TextField<String> zipcodeField = new TextField<String>(
> "zipcode" );
> > form.add( zipcodeField.setRequired( true ) );
> > OnChangeAjaxBehavior zipcodeUpdated = new OnChangeAjaxBehavior() {
> > @Override
> > protected void onUpdate( AjaxRequestTarget target ) {
> > System.out.println( "Zipcode value: " +
> zipcodeField.getDefaultModelObjectAsString() );
> > }
> > };
> > zipcodeField.add( zipcodeUpdated );
> >
> >
> > I
> > could check to see the size of the zipcodeField (in this example), but
> > it makes my application more chatty than it needs to be. I also tried
> > using onblur, which works fine, but does not satisfy my business
> > requirements:
> >
> > final TextField<String> zipcodeField = new TextField<String>( "zipcode"
> );
> > form.add( zipcodeField.setRequired( true ) );
> >
> > AjaxFormComponentUpdatingBehavior zipcodeOnBlur = new
> AjaxFormComponentUpdatingBehavior( "onblur" ) {
> > @Override
> > protected void onUpdate( AjaxRequestTarget target ) {
> > System.out.println( "Zipcode value (form component): " +
> getFormComponent().getModelObject() );
> > }
> > };
> > zipcodeField.add( zipcodeOnBlur );
> >
> >
> >
> > Prior
> > to using Wicket (which I'm currently prototyping for my company), we
> > would handle this logic in JavaScript (observe changes to the field and
> > when the user enters the fifth character then we made an AJAX call back
> > our Struts 2 application.)
> >
> > What is the best way to achieve the same end using Wicket?
> >
> > Thanks, in advance, for your help!
> > Steve
> >
> > P.S.
> > I started using Wicket as part of an article series (because of all of
> > your passion for it) and I have to say all of you are doing incredible
> > work - I love it.. Here's the link to the article series in case any of
> > you are interested:
> > http://www.informit.com/guides/content.aspx?g=java&seqNum=529
> >
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> >
> >
>
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