plone.app.discussion/plone/app/discussion/browser/controlpanel.py

from Products.Five.browser import BrowserView

from zope.component import queryUtility
from plone.registry.interfaces import IRegistry

from plone.app.registry.browser import controlpanel

from plone.app.discussion.interfaces import IDiscussionSettings, _

try:
    # only in z3c.form 2.0
    from z3c.form.browser.textlines import TextLinesFieldWidget
    from z3c.form.browser.widget import SingleCheckBoxWidget
except ImportError:
    from plone.z3cform.textlines import TextLinesFieldWidget
    from plone.z3cform.widget import SingleCheckBoxWidget

class DiscussionSettingsEditForm(controlpanel.RegistryEditForm):

    schema = IDiscussionSettings
    label = _(u"Discussion settings")
    description = _(u"""Some discussion related settings are not located
                        in the Discussion Control Panel.

                        To enable comment moderation, go to the Types Control Panel,
                        choose "Comment", and set the workflow to "Comment Review Workflow".
                        """)

    def updateFields(self):
        super(DiscussionSettingsEditForm, self).updateFields()
        #self.fields['globally_enabled'].widgetFactory = SingleCheckBoxWidget

    def updateWidgets(self):
        super(DiscussionSettingsEditForm, self).updateWidgets()

class DiscussionSettingsControlPanel(controlpanel.ControlPanelFormWrapper):
    form = DiscussionSettingsEditForm

class Utility(BrowserView):
    """Utility view to determine ...
    """

    def globally_enabled(self):
        """Determine if the utility is enabled and we are in an enabled domain
        """

        registry = queryUtility(IRegistry)
        if registry is None:
            return False

        settings = None
        try:
            settings = registry.forInterface(IDiscussionSettings)
        except KeyError:
            return False

        if not settings.globally_enabled:
            return False
        else:
            return True

        return False