255 # compound widgets #############################################################

   256 

   257 class IntervalWidget(FieldWidget):

   258     """custom widget to display an interval composed by 2 fields. This widget

   259     is expected to be used with a CompoundField containing the two actual

   260     fields.

   261 

   262     Exemple usage::

   263 

   264 from uicfg import autoform_field, autoform_section

   265 autoform_field.tag_attribute(('Concert', 'minprice'),

   266                               CompoundField(fields=(IntField(name='minprice'),

   267                                                     IntField(name='maxprice')),

   268                                             label=_('price'),

   269                                             widget=IntervalWidget()

   270                                             ))

   271 # we've to hide the other field manually for now

   272 autoform_section.tag_attribute(('Concert', 'maxprice'), 'generated')

   273     """

   274     def render(self, form, field, renderer):

   275         actual_fields = field.fields

   276         assert len(actual_fields) == 2

   277         return u'<div>%s %s %s %s</div>' % (

   278             form.req._('from_interval_start'),

   279             actual_fields[0].render(form, renderer),

   280             form.req._('to_interval_end'),

   281             actual_fields[1].render(form, renderer),

   282             )

   283 

   284 

   285 class HorizontalLayoutWidget(FieldWidget):

   286     """custom widget to display a set of fields grouped together horizontally

   287     in a form. See `IntervalWidget` for example usage.

   288     """

   289     def render(self, form, field, renderer):

   290         if self.attrs.get('display_label', True):

   291             subst = self.attrs.get('label_input_substitution', '%(label)s %(input)s')

   292             fields = [subst % {'label': renderer.render_label(form, f),

   293                               'input': f.render(form, renderer)}

   294                       for f in field.fields]

   295         else:

   296             fields = [f.render(form, renderer) for f in field.fields]

   297         return u'<div>%s</div>' % ' '.join(fields)

   298 

   299