Checkboxes within a loop in a form

[mark99 <ma...@vexeddigital.com>]

Hi

I've got a problem implementing a form which renders checkboxes within a
loop, and then posts back the values of the checkboxes on form submission.
In my form submission handler, I need to know which checkboxes the user
checked.

What I'm looking to do is something like this:

Page:

<t:form>
<t:loop source="choices" value="choice">
  <t:checkbox t:value="choice"/>
</t:loop>
<t:submit/>
</t:form>


Class:

void onSubmit() {
  for(boolean b : choices)
    System.out.println(b);
}


Where 'choices' is a List of booleans.

If I put @Persist on 'choices', the list is still null on postback, which I
expected. If I re-initialize the list on postback that doesn't help either
as I've lost the results from the form.

So what is the solution for doing this type of thing?

Thanks, Mark
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Re: Checkboxes within a loop in a form

[Dave Greggory <da...@yahoo.com>]

I believe you will need a submit notifier component.
http://tapestry.apache.org/tapestry5/tapestry-core/ref/org/apache/tapestry5/corelib/components/SubmitNotifier.html

Wrap the submit notifier around <t:checkbox> and use the AfterSubmit event to capture its values.





----- Original Message ----
From: mark99 <ma...@vexeddigital.com>
To: users@tapestry.apache.org
Sent: Monday, May 18, 2009 1:11:11 PM
Subject: Checkboxes within a loop in a form


Hi

I've got a problem implementing a form which renders checkboxes within a
loop, and then posts back the values of the checkboxes on form submission.
In my form submission handler, I need to know which checkboxes the user
checked.

What I'm looking to do is something like this:

Page:

<t:form>
<t:loop source="choices" value="choice">
  <t:checkbox t:value="choice"/>
</t:loop>
<t:submit/>
</t:form>


Class:

void onSubmit() {
  for(boolean b : choices)
    System.out.println(b);
}


Where 'choices' is a List of booleans.

If I put @Persist on 'choices', the list is still null on postback, which I
expected. If I re-initialize the list on postback that doesn't help either
as I've lost the results from the form.

So what is the solution for doing this type of thing?

Thanks, Mark
-- 
View this message in context: http://www.nabble.com/Checkboxes-within-a-loop-in-a-form-tp23601662p23601662.html
Sent from the Tapestry - User mailing list archive at Nabble.com.


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