[Zope3-Users] MultiCheckBoxWidget and formlib

[Tom Dossis]

Mats Nordgren wrote:
> Could anyone give me a hint on setting up a MultiCheckBoxWidget with
> formlib?
> 
> 
> This is what I got:
> 
> class IMySchema(Interface):
>   multichoice = Set(
>     title=_('Pick one or many'),
>     value_type = Choice(values=['one', 'two', 'three']))
> 
> class MyEditForm(form.EditForm):
>   form_fields = form.Fields(IMySchema)
>   form_fields['multichoice'].custom_widget = ????????
> 
> 
> What in the world do I do to get this to work?

I've done something similar along the lines of...

class IMySchema(Interface):
  multichoice = Set(
    title=_('Pick one or many'),
    value_type=SimpleVocabulary.fromItems([
      (_("One"), "one"),
      (_("Two"), "two"),
      (_("Three", "three"),
      ])
Maybe try zope.app.form.browser.MultiSelectWidget ..
It requires 3 args in its constructor which you can wrap for formlib, e.g.

class MyMultiSelectWidget(MultiSelectWidget):

  def __init__(self, field, request):
    super(MyMultiSelectWidget, self).__init__(
      field, field.value_type.vocabulary, request)

Then ..

  form_fields['multichoice'].custom_widget=MyMultiSelectWidget

You could also look at the alternative widget..

  zope.app.form.browser.itemswidgets.MultiCheckBoxWidget