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from django.contrib.admin import ModelAdmin
from django.conf.urls.defaults import patterns, url
from django.core.urlresolvers import reverse, NoReverseMatch
from django.shortcuts import render_to_response
from django.utils.safestring import mark_safe
from django.conf import settings
from django.http import Http404
import logging
logger = logging.getLogger('preview_admin')
class PreviewAdmin(ModelAdmin):
preview_fields = {}
def get_urls(self):
info = self.model._meta.app_label, self.model._meta.module_name
urls = super(PreviewAdmin, self).get_urls()
myurls = patterns('',
url(r'^preview/(.+)/$', self.admin_site.admin_view(self.preview),
name='%s_%s_preview' % info),
)
return myurls + urls
def add_preview(self, fieldname, formfield):
render = formfield.widget.render
def preview_render(name, *args, **kwargs):
rendered = render(name, *args, **kwargs)
info = self.model._meta.app_label, self.model._meta.module_name
preview_url = reverse('admin:%s_%s_preview' % info,
args=[name], current_app=self.admin_site.name)
rendered += '<div id="preview-%s" class="preview-box"></div>' % fieldname
rendered += '<p><a onclick="preview_admin(\'%s\',\'%s\')">Preview</a></p>' % (
fieldname, preview_url)
return mark_safe(rendered)
formfield.widget.render = preview_render
def formfield_for_dbfield(self, db_field, **kwargs):
formfield = super(PreviewAdmin, self).formfield_for_dbfield(db_field, **kwargs)
if db_field.name in self.preview_fields:
self.add_preview(db_field.name, formfield)
return formfield
def preview(self, request, field):
if (field not in self.preview_fields
or 'data' not in request.GET):
raise Http404
context = {
'preview' : mark_safe(self.preview_fields[field](request.GET['data']))
}
return render_to_response('admin/preview.html', context)
def _media(self):
media = super(PreviewAdmin, self)._media()
media.add_js(['%sjs/jquery.js' % settings.ADMIN_MEDIA_PREFIX ])
media.add_js(['%sjs/preview.js' % settings.ADMIN_MEDIA_PREFIX ])
media.add_css({
'all' : ['%scss/preview.css' % settings.ADMIN_MEDIA_PREFIX ]})
return media
media = property(_media)
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