OpenSlides/openslides/projector/models.py

112 lines
3.7 KiB
Python
Raw Normal View History

2012-04-25 22:29:19 +02:00
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
openslides.projector.models
2012-07-07 14:01:40 +02:00
~~~~~~~~~~~~~~~~~~~~~~~~~~~
2012-04-25 22:29:19 +02:00
Models for the projector app.
:copyright: 20112013 by OpenSlides team, see AUTHORS.
2012-04-25 22:29:19 +02:00
:license: GNU GPL, see LICENSE for more details.
"""
2012-02-03 20:49:16 +01:00
from django.db import models
from django.dispatch import receiver
from django.utils.translation import ugettext_lazy, ugettext_noop
from django.core.exceptions import ImproperlyConfigured
from django.core.urlresolvers import reverse
from openslides.utils.utils import int_or_none
2012-07-07 14:01:40 +02:00
class SlideMixin(object):
"""
A Mixin for a Django-Model, for making the model a slide.
"""
slide_callback_name = None
"""
Name of the callback to render the model as slide.
"""
def save(self, *args, **kwargs):
"""
Updates the projector, if 'self' is the active slide.
"""
from openslides.projector.api import update_projector
super(SlideMixin, self).save(*args, **kwargs)
if self.is_active_slide():
update_projector()
def delete(self, *args, **kwargs):
from openslides.projector.api import update_projector
super(SlideMixin, self).delete(*args, **kwargs)
if self.is_active_slide():
update_projector()
def get_slide_callback_name(self):
"""
Returns the name of the slide callback, which is used to render the slide.
"""
if self.slide_callback_name is None:
raise ImproperlyConfigured(
"SlideMixin requires either a definition of 'slide_callback_name'"
" or an implementation of 'get_slide_callback_name()'")
else:
return self.slide_callback_name
def get_absolute_url(self, link='projector'):
"""
Return the url to activate the slide, if link == 'projector'
"""
if link == 'projector':
url_name = 'projector_activate_slide'
elif link == 'projector_preview':
url_name = 'projector_preview'
if link in ('projector', 'projector_preview'):
return '%s?pk=%d' % (
reverse(url_name,
args=[self.get_slide_callback_name()]),
self.pk)
return super(SlideMixin, self).get_absolute_url(link)
def is_active_slide(self):
"""
Return True, if the the slide is the active slide.
"""
from openslides.projector.api import get_active_slide
active_slide = get_active_slide()
pk = int_or_none(active_slide.get('pk', None))
return (active_slide['callback'] == self.get_slide_callback_name() and
self.pk == pk)
class ProjectorSlide(SlideMixin, models.Model):
2012-07-07 14:01:40 +02:00
"""
Model for Slides, only for the projector. Also called custom slides.
"""
slide_callback_name = 'projector_slide'
2012-03-12 18:22:18 +01:00
title = models.CharField(max_length=256, verbose_name=ugettext_lazy("Title"))
text = models.TextField(null=True, blank=True, verbose_name=ugettext_lazy("Text"))
weight = models.IntegerField(default=0, verbose_name=ugettext_lazy("Weight"))
2012-03-12 18:22:18 +01:00
def get_absolute_url(self, link='update'):
if link == 'edit' or link == 'update':
return reverse('customslide_edit', args=[str(self.pk)])
2012-05-18 23:24:54 +02:00
if link == 'delete':
return reverse('customslide_delete', args=[str(self.pk)])
return super(ProjectorSlide, self).get_absolute_url(link)
2012-05-18 23:24:54 +02:00
2012-03-12 18:22:18 +01:00
def __unicode__(self):
return self.title
class Meta:
permissions = (
2012-07-07 14:01:40 +02:00
('can_manage_projector', ugettext_noop("Can manage the projector")),
2012-08-15 10:58:29 +02:00
('can_see_projector', ugettext_noop("Can see the projector")),
('can_see_dashboard', ugettext_noop("Can see the dashboard")),
2012-03-12 18:22:18 +01:00
)