Package: dolmen.widget.file
dolmen.widget.fileis a package that walks hand-in-hand withdolmen.file. It provides a useable and pluggable way to render thedolmen.file.FileFieldin az3c.form.Form, using Grok (throughmegrok.z3cform.base)ExampleWe are going to develop here a small example, to demonstrate the use
ofdolmen.widget.file. First, we need to create a model content with
a file field:>>> import dolmen.file
>>> import grokcore.component as grok
>>> from zope.interface import Interface
>>> from zope.schema.fieldproperty import FieldProperty


>>> class ITravelMount(Interface):
...   luggage = dolmen.file.FileField(title=u'Luggages')


>>> class Mammoth(grok.Context):
...   grok.implements(ITravelMount)
...   luggage = FieldProperty(ITravelMount['luggage'])We now have a travel mammoth on which we can add a luggage. Now, we
need a form to edit the animal:>>> from megrok.z3cform.base import EditForm
>>> class EditMammoth(EditForm):
...    grok.name('edit')
...    grok.context(ITravelMount)

>>> grok.testing.grok_component('edit', EditMammoth)
TrueLet’s instanciate a Mammoth and try to call the form on it:>>> from zope.component import getMultiAdapter
>>> from zope.publisher.browser import TestRequest

>>> manfred = Mammoth()
>>> request = TestRequest()

>>> form = getMultiAdapter((manfred, request), name='edit')
>>> form.updateWidgets()
>>> print form.widgets['luggage'].render()
<span id="form-widgets-luggage"
      class="file-widget required filefield-field">
<BLANKLINE>
<BLANKLINE>
<BLANKLINE>
    <input type="file" id="form-widgets-luggage-input"
           name="form.widgets.luggage" />
<BLANKLINE>
<BLANKLINE>
</span>
<BLANKLINE>Now, let’s try with a value:>>> manfred.luggage = "A nice data"
>>> form = getMultiAdapter((manfred, request), name='edit')
>>> form.updateWidgets()
>>> print form.widgets['luggage'].render()
<span id="form-widgets-luggage"
    class="file-widget required filefield-field">
<BLANKLINE>
  <div style="padding-top: 1em;">
  <input type="radio" value="nochange" checked="checked"
       class="noborder"
       name="form.widgets.luggage.nochange"
           onclick="document.getElementById('form-widgets-luggage-input').disabled=true"
           id="form-widgets-luggage-nochange" />
  <label for="form-widgets-luggage-nochange">Keep existing file</label>
    <br />
<BLANKLINE>
    <label for="form-widgets-luggage-delete">Delete existing file</label>
  <br />
  <input type="radio" value="" class="noborder"
         name="form.widgets.luggage.nochange"
         onclick="document.getElementById('form-widgets-luggage-input').disabled=false"
         id="form-widgets-luggage-replace" />
      <label for="form-widgets-luggage-replace">Replace with new file</label>
</div>
  <div style="padding-left: 1.5em; padding-top: 0.5em;">
  <input type="file" id="form-widgets-luggage-input"
           name="form.widgets.luggage" />
  <script type="text/javascript">document.getElementById('form-widgets-luggage-input').disabled=true;</script>
  </div>
</span>
<BLANKLINE>Changelog0.2 (2010-03-01)Code base has been cleaned to be pep8 compliant.We are now using thezope.size.ISizedadaptation to get the size
of the file to display.Cleaned dependencies. zope.app dependencies have been severed when
possible.0.1 (2009-10-21)Initial release