[Html-widget] Re: FormFu custom element with javascript

[Carl Franks]

On 14/03/07, Mario Minati <mario.minati at googlemail.com> wrote:
> Am Dienstag 13 März 2007 23:45 schrieben Sie:
> > As I understand the code, the place to generate a custom javascript for the
> > widget is in a custom render function, right?

All field elements have a javascript() method.
Look in file "root/field" to see where it's used.

We probably ought to have a javascript() method on form, too.
Maybe add a new issue for this on the project page?
http://code.google.com/p/html-formfu/issues/list

> > My problem is now that I need the id of the widget to access it later via
> > javascript, but prepare_id has not been called yet in the render function
> > of Element.pm.
> >
> > Is it possible to call prepare_id before creating the render object or
> > would that mix something up?

Now that we don't have the intermediate $result object, this is harder.
prepare_id() has to do it's work on the $render object, so that it
doesn't change the original form/field at all - which would cause
problems, if for example, you cloned the form and gave the new form a
different ID. The field would have a hard-coded ID, so auto_id()
wouldn't be used.

> Ok I found out that changing the position is not possible.
>
> How to fix this?
> Is there a way to tell TT to double parse the content? This way we could use
> TT stuff inside the render function e.g. "[self.id]" to access the id.

My first thought is that if you're needing access to the ID during
form creation, you probably ought to be setting that field's ID
explicitly.

Carl