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

[Mario Minati]

Am Donnerstag 15 März 2007 11:35 schrieb 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

Has been filed, but due to a google code server problem I got the type wrong. 
It should be an enhancement. But it seems than I cannot change any entries.

> > > 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.

I did something else, which is something like a hack. I put the code 
in 'prepare_attrs' this way it works fine.

Greets,
Mario