[Zope3-Users] Using a multicheckboxwidget instead of a multiselectsetwidget

[Jan-Wijbrand Kolman]

Hello,


I have a interface defined for some content type, say IFoo. IFoo defines one
schema field:

  _filetypes = SimpleVocabulary.fromValues(('fropple', 'frepple', 'froople'))

  class IFoo(Interface):

    filetypes = Set(
      title=u'',
      required=False,
      value_type=Choice(vocabulary=_filetypes),
      )

By default, the edit widget that is used for this field, is a
zope.app.form.browser.MultiSelectSetWidget, which will render a <select
multiple="multiple">...</select> element.

Now I'd like to use multiple checkboxes instead, since the number of choices for
this field will never exceed 3 or 4 anyway. I thought to accomplish this by
configuring the MultiCheckBoxWidget for this, in the addform registration for
the Foo content type:

  <addform
    name="add_foo"
    label="Add Foo"
    schema=".interfaces.IFoo"
    fields="filetypes"
    content_factory=".foo.Foo"
    template="foo.pt"
    permission="zope.Public"
  >
  <widget
    field="filetypes"
    class="zope.app.form.browser.itemswidgets.MultiCheckBoxWidget"
  />
  </addform>

This however doesn't work and I get the following traceback (pasted the last
couple of lines):

  File "...zope31/src/zope/app/form/browser/add.py", line 47, in _setUpWidgets
    setUpWidgets(self, self.schema, IInputWidget, names=self.fieldNames)
  File "...zope31/src/zope/app/form/utility.py", line 153, in setUpWidgets
    context=context)
  File "...zope31/src/zope/app/form/utility.py", line 101, in setUpWidget
    widget = widget(field.bind(context), view.request)
  File "...zope31/src/zope/app/form/__init__.py", line 97, in __call__
    instance = self._widget_factory(*args)
TypeError: __init__() takes exactly 4 arguments (3 given)

Now, I do indeed see the __init__ for the MultiCheckboxWidget class (well, one
of its baseclasses actually) expects a vocabulary argument. How can I make sure
this widget gets all the info it needs? Maybe I just don't see the obvious, but
can anyone provide some hint in the right direction?

Thanks in advance!


kind regards,
jw

-- 
Jan-Wijbrand Kolman
jw at infrae.com