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From Hugo Palma <hugo.m.pa...@gmail.com>
Subject Re: What's the easiest way to implement two dependent select lists ?
Date Sun, 07 Dec 2008 22:46:51 GMT
I'm already using the OnEvent component. Still, because the model of the 
select list i want to update is calculated server-side i need to pass it 
in json to the client, parse it again in javascript and then update the 
select input. This does work but i feel that there should be a simpler 
way of doing this, maybe using zones.

thermus wrote:
> I'm a Tapestry novice, but you may want to have a look at 
> http://code.google.com/p/tapestry5-components/ t5components .  It allows you
> to add a mixin to components to respond to an OnChange event with AJAX (see: 
> this  and 
> this  for details).  You could then change the data model for the other
> select component with a tiny bit of JavaScript in the onCompleteCallback
> function.  
> I'm curious how a Tapestry expert would handle it.
> HugoPalma wrote:
>> I have a very usual use where in a form i have two selects, and when the
>> user selects a value on one the values on the second should be filtered
>> accordingly.
>> As the Select component doesn't support ajax out-of.the-box i see myself
>> forced to implement a lot of plumbing and javascript stuff.
>> Still, i feel that this kind of use case should be much easier to
>> implement.
>> Maybe i'm missing something.
>> I'd like to hear some ideas about how u would handle this.
>> Thanks.

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