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Can I use z3c.form for Plone portlets instead of zope.formlib?

What changes do I need to make, given that I have the generated vanone ZoneSkel plone3_portlet formlib package? I.e:

  • What classes should I inherit from?
  • What interceptors should I provide?

Can I use it up to five .grok and plone.directives.form?

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7 answers

Yes, you can do it, you need add / edit forms ... Here is what I did for the Jarn project, you can use AddForm and EditForm the same way you would use their formlib equvalent:

from Acquisition import aq_parent, aq_inner
from plone.app.portlets import PloneMessageFactory as _
from plone.app.portlets.browser.interfaces import IPortletAddForm
from plone.app.portlets.browser.interfaces import IPortletEditForm
from plone.app.portlets.interfaces import IPortletPermissionChecker
from z3c.form import button
from z3c.form import form
from zope.component import getMultiAdapter
from zope.interface import implements


class AddForm(form.AddForm):
    implements(IPortletAddForm)

    label = _(u"Configure portlet")

    def add(self, object):
        ob = self.context.add(object)
        self._finishedAdd = True
        return ob

    def __call__(self):
        IPortletPermissionChecker(aq_parent(aq_inner(self.context)))()
        return super(AddForm, self).__call__()

    def nextURL(self):
        addview = aq_parent(aq_inner(self.context))
        context = aq_parent(aq_inner(addview))
        url = str(getMultiAdapter((context, self.request),
                                  name=u"absolute_url"))
        return url + '/@@manage-portlets'

    @button.buttonAndHandler(_(u"label_save", default=u"Save"), name='add')
    def handleAdd(self, action):
        data, errors = self.extractData()
        if errors:
            self.status = self.formErrorsMessage
            return
        obj = self.createAndAdd(data)
        if obj is not None:
            # mark only as finished if we get the new object
            self._finishedAdd = True

    @button.buttonAndHandler(_(u"label_cancel", default=u"Cancel"),
                             name='cancel_add')
    def handleCancel(self, action):
        nextURL = self.nextURL()
        if nextURL:
            self.request.response.redirect(nextURL)
        return ''


class EditForm(form.EditForm):
    """An edit form for portlets.
    """

    implements(IPortletEditForm)

    label = _(u"Modify portlet")

    def __call__(self):
        IPortletPermissionChecker(aq_parent(aq_inner(self.context)))()
        return super(EditForm, self).__call__()

    def nextURL(self):
        editview = aq_parent(aq_inner(self.context))
        context = aq_parent(aq_inner(editview))
        url = str(getMultiAdapter((context, self.request),
                                  name=u"absolute_url"))
        return url + '/@@manage-portlets'

    @button.buttonAndHandler(_(u"label_save", default=u"Save"), name='apply')
    def handleSave(self, action):
        data, errors = self.extractData()
        if errors:
            self.status = self.formErrorsMessage
            return
        changes = self.applyChanges(data)
        if changes:
            self.status = "Changes saved"
        else:
            self.status = "No changes"

        nextURL = self.nextURL()
        if nextURL:
            self.request.response.redirect(self.nextURL())
        return ''

    @button.buttonAndHandler(_(u"label_cancel", default=u"Cancel"),
                             name='cancel_add')
    def handleCancel(self, action):
        nextURL = self.nextURL()
        if nextURL:
            self.request.response.redirect(nextURL)
        return ''
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  • ggozad plone.app.portlets

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  • Plone 5, plone.app.portlets < 3.0

Significant credit to the author for this package (note that this was written before the ggozad solution was integrated into plone.app.portlets)

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