Question about dynamic form values

[Alejandro Martinez]

Hi,

I have a page that has a form with some fields and a label (HtmlElement - h3) with a number (ej. 100).

I'm trying to figure out how to do that when I input some numbers on the form fields, the number of the label gets automatically decremented.

For instance if the label is 100, then when I input 10 in the first field, then, the label says 90 (100 - 10), if I delete then 10, then the label says 100 .....

I'm trying to use js bindings or maybe in the $field->js('change') method but I'cant get the value of the field.

Thanks a lot.

[Romans Malinovskis]

php code:

$this->js()->_load('my_univ');

$h1 = $this->add('h1');

$field = $form->addField('item');

$field->js('change')->univ()->myremainder(100, $h1);

the my_univ.js:

myremainder: function(total, dest) {

  $(dest).text( total - this.jquery.val() );  

}

Hopefully this would work.

[Alejandro Martinez]

Romans, thank you very much for your reply.

I see that you pass a 'static' value (100) to the method 'myremainder'.

I have tried to modify your code to add two or more fields so when field1 change, then the value of the label is (for instance 100-10 = 90), and when the value of field 2 change (add 10), then the value of the label is 90 - 10 = 80....

Is it possible ?

and one more, how can I do to get a form value before the onsubmit() event.

If I do a

if ( $f->isSubmited() )
{

   $f->js()->univ()->alert($f->get('field') )
}

Everything works, but if I do a

$field->js('change')->univ()->alert($field->get('field') ) the output is null.

Thanks a lot.
Alejandro

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[Romans Malinovskis]

I can write a further documentation or tutorial on this, but I'm not sure which examples you would want me to cover. 

subtracting fields is something quite specific, it does require you to write a bit of custom javascript code.

Have you read all the docs in the JavaScript section of the book such as: http://book.agiletoolkit.org/js/univ.html

romans

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