AdminImageWidget

admin.py

from django.contrib import admin
from django.db import models
from django.contrib import admin
from django.forms import forms
from django.utils.safestring import mark_safe
from django.contrib.admin.widgets import AdminFileWidget

from models import Service, Client, Proyect, Image, Country,LineAction
from cms.plugins.text.widgets.wymeditor_widget import WYMEditor
from sorl.thumbnail.admin import AdminInlineImageMixin
from django.conf.urls.defaults import patterns


class AdminImageWidget(AdminFileWidget):
    def render(self, name, value, attrs=None):
        output = []
        if value and getattr(value, "url", None):

            image_url = value.url
            file_name=str(value)

            # defining the size
            size='100x100'
            x, y = [int(x) for x in size.split('x')]
            try :
                # defining the filename and the miniature filename
                filehead, filetail  = os.path.split(value.path)
                basename, format    = os.path.splitext(filetail)
                miniature           = basename + '_' + size + format
                filename            = value.path
                miniature_filename  = os.path.join(filehead, miniature)
                filehead, filetail  = os.path.split(value.url)
                miniature_url       = filehead + '/' + miniature

                # make sure that the thumbnail is a version of the current original sized image
                if os.path.exists(miniature_filename) and os.path.getmtime(filename) > os.path.getmtime(miniature_filename):
                    os.unlink(miniature_filename)

                # if the image wasn't already resized, resize it
                if not os.path.exists(miniature_filename):
                    image = Image.open(filename)
                    image.thumbnail([x, y], Image.ANTIALIAS)
                    try:
                        image.save(miniature_filename, image.format, quality=100, optimize=1)
                    except:
                        image.save(miniature_filename, image.format, quality=100)

                output.append(u' <div><a href="%s" target="_blank"><img src="%s" alt="%s" /></a></div> %s ' %\
                              (miniature_url, miniature_url, miniature_filename, _('Change:')))
            except:
                pass
        output.append(super(AdminFileWidget, self).render(name, value, attrs))
        return mark_safe(u''.join(output))
    
class ImageInline(AdminInlineImageMixin,admin.TabularInline):
    model =Image
    can_delete = True
    def formfield_for_dbfield(self,db_field, **kwargs):
        if isinstance(db_field, models.ImageField):
            return db_field.formfield( widget = AdminImageWidget)
        return super(ImageInline, self).formfield_for_dbfield(db_field, **kwargs)


class ProyectAdmin(admin.ModelAdmin):
    inlines = [ImageInline]
    formfield_overrides = {
     #   models.TextField : {'widget': WYMEditor},
    }
    list_display = ("name", "sequence",)
    list_editable = ( "sequence", )
    search_fields = ['name']
    class Media:
        js = (
        "js/jquery-1.4.3.min.js",
        "https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.9/jquery-ui.min.js",
        "js/order.js")


admin.site.register(Service)
admin.site.register(Client)
admin.site.register(Country)
admin.site.register(Proyect,ProyectAdmin)
admin.site.register(LineAction)