Ooops - my error.
I need to do something like:
pcntDiscount.setModel(new Model(amount.getModelObject().toString()));
Then the AjaxFormComponentUpdatingBehavior works as expected.
Steve
steve222 wrote:
>
> Many thanks for the detailed answer.
>
> I don't think the single field AbsoluteOrPercentage idea will work for me
> without a lot of other changes. I use the same form for editing a record
> as creating a new one. So I actually need to show both the
> AbsoluteDiscount and PercentageDiscount on the form at the same time -
> user enters % during initial entry, he needs to see % on later edit, etc.
> Both fields need to be editable, with the one that doesn't get edited
> being calculated. But thanks for the idea and the detail on how to
> implement this.
>
> I've been attempting to do it with separate fields for AbsoluteDiscount
> and PercentageDiscount - but it does not work for me. My model object
> used in the form does not have setters for the calculated field
> PercentageDiscount - just a getter to display the calculated % value. So
> I can't update this with AjaxFormComponentUpdatingBehavior.
>
> And it seems I can't update the fields using AjaxEventBehavior, eg:
>
> final RequireTextfield amount = new RequiredTextfield("amount",
> Double.class);
> amount.add(DoubleMinimumValidator.minimum(1));
> amount.setOutputMarkupId(true);
> container.add(amount);
>
> amount.add(new AjaxEventBehavior("onblur") {
> protected void onEvent(AjaxRequestTarget target) {
>
> // this will always be null on new data entry, and old value
> on edit
> pcntDiscount.setModelObject(amount.getModelObject().toString());
> target.addComponent(pcntDiscount);
> }
> });
>
>
>
> jWeekend wrote:
>>
>> Steve,
>>
>> If you prefer not to take the easy option and add a couple of radio
>> buttons to let the user select currency or percentage input, that could
>> also control a couple of labels (or a border) that shows, in a locale
>> specific way, the currency symbol or the percentage sign you could ...
>> create an AbsoluteOrPercentage class an instance of which will back the
>> model of your DiscountAmount field. Make a validator that checks that the
>> last character entered looks like an int or a '%' and that the other
>> characters represent a number, and, if required, put your validation
>> messages in the appropriate place. Add this validator to your
>> DiscountAmount text field. Make an appropriate converter (implement
>> IConverter - very simple logic required for both methods) and override
>> getConverter on your text field to return it for your
>> AbsoluteOrPercentage class. If this text field will be useful elsewhere,
>> make a (top level) subclass of TextField - AbsoluteOrPercentageTextField
>> for instance that does all of the above.
>>
>> It is not clear from your post what you want updated, but let's assume
>> you have three fields, one for each of SalePrice, DiscountAmount and
>> ActualAmount (price with discount applied) and you want the latter
>> updated. Add an AjaxFormComponentUpdatingBehavior (probably "onblur") to
>> both the input fields. In the onUpdate methods of each update the
>> (dynamic) model object backing the ActualAmount field (probably rendered
>> by a label since it is not meant to be edited by the user). Don't forget
>> to add your "actualAmountTextField" component to the AjaxRequestTarget in
>> both your onUpdate methods and also to request a markup id for
>> actualAmountTextField - actualAmountField.setMarkupId(true) - where you
>> build up the container. If this lot is likely to be useful elsewhere,
>> wrap all three fields (and probably all the rest of the stuff described
>> above) in a Panel so you can just drop it in a div anywhere you like
>> later on.
>>
>> Does that do it?
>>
>> Regards - Cemal
>> http://www.jWeekend.co.uk http://jWeekend.co.uk
>>
>>
>>
>>
>> steve222 wrote:
>>>
>>> Hi. Hopefully I can explain this scenario OK - I'll try to keep it
>>> simple.
>>>
>>> On a form, I have a couple of TextFields - SalePrice and DiscountAmount.
>>>
>>> After the user enters SalePrice, I need a way to allow the user to enter
>>> the DiscountAmount as either a flat rate or as a percentage of the
>>> SalePrice.
>>>
>>> For example, if entered SalePrice is 1000, the user could enter a flat
>>> DiscountAmount of 200.00. Or they could enter 20%. I'd like the option
>>> to do either since SalePrice might be 8,745 and the discount 2.75% or
>>> something (so hard to just calculat the true cash amount). Or it might
>>> just really be a flat £200 in which case hard to calculate the %.
>>>
>>> In a traditional app where I'm writing the JavaScript, I can think of
>>> various ways to do this involving extra fields for flatrate and/or % -
>>> then updating the real DiscountAmount field when the "dummy" fields
>>> change.
>>>
>>> But I'm trying to work out an elegant way with Wicket/AJAX - without too
>>> much success so far.
>>>
>>> Any suggestions - or links to similar examples? Ideally, the fewer
>>> extra dummy fields the better.
>>>
>>> Thanks.
>>>
>>>
>>>
>>
>>
>
>
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