admin/widgets.py

   1 from django import forms
   2 from django.conf import settings
   3 from django.contrib.admin.widgets import FilteredSelectMultiple, url_params_from_lookup_dict
   4 from django.utils.translation import ugettext as _
   5 from django.utils.safestring import mark_safe
   6 from django.utils.text import truncate_words
   7 from django.utils.html import escape
   8
   9
  10 class ModelLookupWidget(forms.TextInput):
  11         # is_hidden = False
  12
  13         def __init__(self, content_type, attrs=None, limit_choices_to=None):
  14                 self.content_type = content_type
  15                 self.limit_choices_to = limit_choices_to
  16                 super(ModelLookupWidget, self).__init__(attrs)
  17
  18         def render(self, name, value, attrs=None):
  19                 related_url = '../../../%s/%s/' % (self.content_type.app_label, self.content_type.model)
  20                 params = url_params_from_lookup_dict(self.limit_choices_to)
  21                 if params:
  22                         url = u'?' + u'&amp;'.join([u'%s=%s' % (k, v) for k, v in params.items()])
  23                 else:
  24                         url = u''
  25                 if attrs is None:
  26                         attrs = {}
  27                 if "class" not in attrs:
  28                         attrs['class'] = 'vForeignKeyRawIdAdminField'
  29                 output = [super(ModelLookupWidget, self).render(name, value, attrs)]
  30                 output.append('<a href="%s%s" class="related-lookup" id="lookup_id_%s" onclick="return showRelatedObjectLookupPopup(this);">' % (related_url, url, name))
  31                 output.append('<img src="%simg/admin/selector-search.gif" width="16" height="16" alt="%s" />' % (settings.ADMIN_MEDIA_PREFIX, _('Lookup')))
  32                 output.append('</a>')
  33                 if value:
  34                         value_class = self.content_type.model_class()
  35                         try:
  36                                 value_object = value_class.objects.get(pk=value)
  37                                 output.append('&nbsp;<strong>%s</strong>' % escape(truncate_words(value_object, 14)))
  38                         except value_class.DoesNotExist:
  39                                 pass
  40                 return mark_safe(u''.join(output))
  41
  42
  43 class TagFilteredSelectMultiple(FilteredSelectMultiple):
  44         """
  45         A SelectMultiple with a JavaScript filter interface.
  46
  47         Note that the resulting JavaScript assumes that the jsi18n
  48         catalog has been loaded in the page
  49         """
  50         class Media:
  51                 js = (settings.ADMIN_MEDIA_PREFIX + "js/core.js",
  52                           settings.ADMIN_MEDIA_PREFIX + "js/SelectBox.js",
  53                           settings.ADMIN_MEDIA_PREFIX + "js/SelectFilter2.js")
  54
  55                 if 'staticmedia' in settings.INSTALLED_APPS:
  56                         import staticmedia
  57                         js += (staticmedia.url('admin/js/TagCreation.js'),)
  58                 else:
  59                         js += (settings.ADMIN_MEDIA_PREFIX + "js/TagCreation.js",)
  60
  61         def render(self, name, value, attrs=None, choices=()):
  62                 if attrs is None: attrs = {}
  63                 attrs['class'] = 'selectfilter'
  64                 if self.is_stacked: attrs['class'] += 'stacked'
  65                 output = [super(FilteredSelectMultiple, self).render(name, value, attrs, choices)]
  66                 output.append(u'<script type="text/javascript">addEvent(window, "load", function(e) {')
  67                 # TODO: "id_" is hard-coded here. This should instead use the correct
  68                 # API to determine the ID dynamically.
  69                 output.append(u'SelectFilter.init("id_%s", "%s", %s, "%s"); tagCreation.init("id_%s"); });</script>\n' % \
  70                         (name, self.verbose_name.replace('"', '\\"'), int(self.is_stacked), settings.ADMIN_MEDIA_PREFIX, name))
  71                 return mark_safe(u''.join(output))