text: #-*- coding: utf-8 -*-
  from django import forms
  from django.utils.translation import ugettext  as _
  from filer import settings as filer_settings, settings
  from filer.admin.fileadmin import FileAdmin
  from filer.models import Image
  
  
  class ImageAdminForm(forms.ModelForm):
      subject_location = forms.CharField(
                      max_length=64, required=False,
                      label=_('Subject location'),
                      help_text=_('Location of the main subject of the scene.'))
  
      def sidebar_image_ratio(self):
          if self.instance:
              # this is very important. It forces the value to be returned as a
              # string and always with a "." as seperator. If the conversion
              # from float to string is done in the template, the locale will
              # be used and in some cases there would be a "," instead of ".".
              # javascript would parse that to an integer.
              return  "%.6F" % self.instance.sidebar_image_ratio()
          else:
              return ''
  
      class Meta:
          model = Image
  
      class Media:
          css = {
              #'all': (settings.MEDIA_URL + 'filer/css/focal_point.css',)
          }
          js = (
              filer_settings.FILER_STATICMEDIA_PREFIX + 'js/raphael.js',
              filer_settings.FILER_STATICMEDIA_PREFIX + 'js/focal_point.js',
          )
  
  
  class ImageAdmin(FileAdmin):
      form = ImageAdminForm
  
  
  ImageAdmin.fieldsets = ImageAdmin.build_fieldsets(
      extra_main_fields=('default_alt_text', 'default_caption',),
      extra_fieldsets=(
          ('Subject Location', {
              'fields': ('subject_location',),
              'classes': ('collapse',),
          }),
      )
  )
  