Added ungleich app to extend Page models.

Ungleich app has a model called UngleichPage,
this model has an attribute called image_header
which will be used to set the background image for
the page header.

Signed-off-by: rscnt <rascnt@gmail.com>

ungleich/admin.py

@@ -0,0 +1,12 @@
+from django.contrib import admin
+from cms.extensions import PageExtensionAdmin
+
+# Register your models here.
+
+from .models import UngleichPage
+
+
+class UngleichPageAdmin(PageExtensionAdmin):
+    pass
+
+admin.site.register(UngleichPage, UngleichPageAdmin)

ungleich/cms_toolbar.py

@@ -0,0 +1,25 @@
+from cms.extensions.toolbar import ExtensionToolbar
+from django.utils.translation import ugettext_lazy as _
+
+from cms.toolbar_pool import toolbar_pool
+from cms.toolbar_base import CMSToolbar
+
+from .models import UngleichPage
+
+
+@toolbar_pool.register
+class UngleichPageToolbar(ExtensionToolbar):
+    # defineds the model for the current toolbar
+    model = UngleichPage
+
+    def populate(self):
+        # setup the extension toolbar with permissions and sanity checks
+        current_page_menu = self._setup_extension_toolbar()
+        # if it's all ok
+        if current_page_menu:
+            # retrieves the instance of the current extension (if any) and the toolbar item url
+            page_extension, url = self.get_page_extension_admin()
+            if url:
+                # adds a toolbar item
+                current_page_menu.add_modal_item(_('Page Header'), url=url,
+                    disabled=not self.toolbar.edit_mode)

ungleich/migrations/0001_initial.py

@@ -0,0 +1,27 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cms', '0011_auto_20150419_1006'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='UngleichPage',
+            fields=[
+                ('id', models.AutoField(serialize=False, primary_key=True, auto_created=True, verbose_name='ID')),
+                ('image_header', models.ImageField(upload_to='image_header')),
+                ('extended_object', models.OneToOneField(editable=False, to='cms.Page')),
+                ('public_extension', models.OneToOneField(editable=False, related_name='draft_extension', null=True, to='ungleich.UngleichPage')),
+            ],
+            options={
+                'abstract': False,
+            },
+            bases=(models.Model,),
+        ),
+    ]

ungleich/models.py

@@ -0,0 +1,12 @@
+from django.db import models
+
+from cms.extensions import PageExtension
+from cms.extensions.extension_pool import extension_pool
+
+
+# Create your models here.
+
+class UngleichPage(PageExtension):
+    image_header = models.ImageField(upload_to='image_header')
+
+extension_pool.register(UngleichPage)

ungleich/tests.py

@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.

ungleich/views.py

@@ -0,0 +1,3 @@
+from django.shortcuts import render
+
+# Create your views here.