21ff62dd32
Changed api for main menu entries. Enhanced http error pages using a classed based views. Moved dashboard and select widgets view from projector to core app. Also some small clean ups.
121 lines
4.0 KiB
Python
121 lines
4.0 KiB
Python
# -*- coding: utf-8 -*-
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from django.core.urlresolvers import reverse
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from django.dispatch import Signal, receiver
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from .dispatch import SignalConnectMetaClass
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from .signals import template_manipulation
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class MainMenuEntry(object):
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"""
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Base class for a main menu entry.
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Every app which wants to add entries has to create a class subclassing
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from this base class. For the appearance the verbose_name, the
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pattern_name and the icon-css-class attribute have to be set. The
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__metaclass__ attribute (SignalConnectMetaClass) does the rest of the
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magic.
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For the appearance there are some optional attributes like
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permission_required, default_weight, stylesheets and javascript_files.
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"""
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__metaclass__ = SignalConnectMetaClass
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signal = Signal(providing_args=['request'])
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verbose_name = None
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permission_required = None
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default_weight = 0
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pattern_name = None
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icon_css_class = 'icon-home'
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stylesheets = None
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javascript_files = None
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def __init__(self, sender, request, **kwargs):
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"""
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Initializes the main menu entry instance. This is done when the signal
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is sent.
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Only the required request argument is used. Because of Django's signal
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API, we have to take also a sender argument and wildcard keyword
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arguments. But they are not used here.
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"""
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self.request = request
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def __unicode__(self):
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if self.verbose_name is None:
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raise NotImplementedError(
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'The main menu entry class %s must provide a verbose_name '
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'attribute or override the __unicode__ method.' % type(self).__name__)
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return unicode(self.verbose_name)
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@classmethod
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def get_dispatch_uid(cls):
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"""
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Returns the classname as a unique string for each class. Returns None
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for the base class so it will not be connected to the signal.
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"""
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if not cls.__name__ == 'MainMenuEntry':
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return cls.__name__
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def check_permission(self):
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"""
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Returns True if the request user is allowed to see the entry.
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"""
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return self.permission_required is None or self.request.user.has_perm(self.permission_required)
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def get_icon_css_class(self):
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"""
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Returns the css class name of the icon. Default is 'icon-home'.
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"""
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return self.icon_css_class
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def get_url(self):
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"""
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Returns the url of the entry.
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"""
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if self.pattern_name is None:
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raise NotImplementedError(
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'The main menu entry class %s must provide a pattern_name '
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'attribute or override the get_url method.' % type(self).__name__)
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return reverse(self.pattern_name)
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def is_active(self):
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"""
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Returns True if the entry is selected at the moment.
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"""
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try:
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return_value = isinstance(self, self.request.active_main_menu_class)
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except AttributeError:
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return_value = self.request.path.startswith(self.get_url())
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return return_value
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def get_stylesheets(self):
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"""
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Returns an interable of stylesheets to be loaded.
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"""
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return iter(self.stylesheets or [])
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def get_javascript_files(self):
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"""
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Returns an interable of javascript files to be loaded.
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"""
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return iter(self.javascript_files or [])
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def main_menu_entries(request):
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"""
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Adds all main menu entries to the request context as template context
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processor.
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"""
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return {'main_menu_entries': MainMenuEntry.get_all(request)}
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@receiver(template_manipulation, dispatch_uid="add_main_menu_context")
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def add_main_menu_context(sender, request, context, **kwargs):
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"""
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Adds all stylefiles from all main menu entries to the context.
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"""
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for main_menu_entry in MainMenuEntry.get_all(request):
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context['extra_stylefiles'].extend(main_menu_entry.get_stylesheets())
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context['extra_javascript'].extend(main_menu_entry.get_javascript_files())
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