Proposal for a new form directive

Hi Folks

I would like to propose a new plone form directive that allows you to
configure widgets without having to resort to the "updateWidgets" method
on a custom add/edit form.

Something like this:

    # Set custom widget
    form.widget(champion=widget.UserAndGroupSelectionFieldWidget)

    # Configure the widget
    form.configure(champion={
        'label': 'foo',
        'usersOnly': True
        'size': 10,
        'searchableProperties': ('fullname',)
    })

and if you want to restrict it to a specific interface:

    form.configure(IEditForm, champion={
        'label': 'foo',
        'usersOnly': True,
        'size': 10,
        'searchableProperties': ('fullname',)
    })

I think it's silly that we're able to hide and move around form widgets
via form directives but we have to resort to custom add/edit forms to do
simple widget customizations (like setting a custom label).

With Archetypes it was possible to customize the widget in your schema
declaration and I think it should be possible for z3c.form/Dexterity as
well.

I'm happy to implement this if people think it's a good idea, I'm going
to do part of it anyway because I need it in my specific usecase. So the
question is really if this can go into plone.directives.

Would this type of change require a PLIP? I assume so.

Regards
JC


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