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[wolnelektury.git] / apps / newtagging / admin.py
1 # -*- coding: utf-8 -*-
2 from django.contrib import admin
3 from django import forms
4 from django.utils.safestring import mark_safe
5 from django.utils.translation import ugettext_lazy as _
6
7
8 class FilteredSelectMultiple(forms.SelectMultiple):
9     """
10     A SelectMultiple with a JavaScript filter interface.
11
12     Note that the resulting JavaScript assumes that the SelectFilter2.js
13     library and its dependencies have been loaded in the HTML page.
14     """
15     def _media(self):
16         from django.conf import settings
17         js = ['js/SelectBox.js' , 'js/SelectFilter2.js']
18         return forms.Media(js=['%s%s' % (settings.ADMIN_MEDIA_PREFIX, url) for url in js])
19     media = property(_media)
20     
21     def __init__(self, verbose_name, is_stacked, attrs=None, choices=()):
22         self.verbose_name = verbose_name
23         self.is_stacked = is_stacked
24         super(FilteredSelectMultiple, self).__init__(attrs, choices)
25
26     def render(self, name, value, attrs=None, choices=()):
27         from django.conf import settings
28         output = [super(FilteredSelectMultiple, self).render(name, value, attrs, choices)]
29         output.append(u'<script type="text/javascript">addEvent(window, "load", function(e) {')
30         # TODO: "id_" is hard-coded here. This should instead use the correct
31         # API to determine the ID dynamically.
32         output.append(u'SelectFilter.init("id_%s", "%s", %s, "%s"); });</script>\n' % \
33             (name, self.verbose_name.replace('"', '\\"'), int(self.is_stacked), settings.ADMIN_MEDIA_PREFIX))
34         return mark_safe(u''.join(output))
35
36
37 class TaggableModelForm(forms.ModelForm):
38     tags = forms.MultipleChoiceField(label=_('tags').capitalize(), required=True, widget=FilteredSelectMultiple(_('tags'), False))
39
40     def __init__(self, *args, **kwargs):
41         if 'instance' in kwargs:
42             if 'initial' not in kwargs:
43                 kwargs['initial'] = {}
44             kwargs['initial']['tags'] = [tag.id for tag in self.tag_model.objects.get_for_object(kwargs['instance'])]
45         super(TaggableModelForm, self).__init__(*args, **kwargs)
46         self.fields['tags'].choices = [(tag.id, tag.name) for tag in self.tag_model.objects.all()]
47     
48     def save(self, commit):
49         obj = super(TaggableModelForm, self).save()
50         tag_ids = self.cleaned_data['tags']
51         tags = self.tag_model.objects.filter(pk__in=tag_ids)
52         self.tag_model.objects.update_tags(obj, tags)
53         return obj
54
55     def save_m2m(self):
56         # TODO: Shouldn't be needed
57         pass
58
59
60 class TaggableModelAdmin(admin.ModelAdmin):
61     form = TaggableModelForm
62     
63     def get_form(self, request, obj=None):
64         form = super(TaggableModelAdmin, self).get_form(request, obj)
65         form.tag_model = self.tag_model
66         return form
67