Minor fixes needed for generic key name
We no longer try to retreive an entity when there are unset fields.
This sort of makes 'getIfFields' obsolete, since we check if fields
now anyway. This is needed because getKeyFieldsFromDict expects the
fields to be set.
Also a minor fix in a Django template so that the generic 'edit' page
has a working delete button again.
#!/usr/bin/python2.5
#
# Copyright 2008 the Melange authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Representations and manipulation of arbitrarily nested menus.
"""
__authors__ = [
'"Todd Larsen" <tlarsen@google.com>',
]
from django.utils import datastructures
class Menu:
"""Ordered collection of MenuItem objects.
MenuItems are retrievable as an ordered list or individually by their
MenuItem.text key.
"""
def __init__(self, items=None):
"""Initializes ordered list of MenuItems.
Args:
items: list of MenuItem objects in display order
"""
if not items:
items = []
items = [(i.name, i) for i in items]
self._items = datastructures.SortedDict(data=items)
def getItem(self, name):
"""Returns a MenuItem retrieved by its MenuItem.text."""
return self._items.get(name)
def setItem(self, item):
"""Overwrites an existing MenuItem, or appends a new one."""
self._items[item.name] = item
def delItem(self, name):
"""Removes an existing MenuItem."""
del self._items[name]
def _getItems(self):
"""Returns an ordered list of the MenuItems."""
return self._items.values()
items = property(_getItems, doc=
"""Read-only list of MenuItems, for use in templates.""")
class MenuItem:
"""Provides menu item properties as easily-accessible attributes.
"""
def __init__(self, name, value=None, selected=False, annotation=None,
sub_menu=None):
"""Initializes the menu item attributes from supplied arguments.
Args:
name: name of the menu item
value: optional value associated with the menu item;
default is None
selected: Boolean indicating if this menu item is selected;
default is False
annotation: optional annotation associated with the menu item;
default is None
sub_menu: a Menu of sub-items to display below this menu item;
default is None, indicating no sub-menu
"""
self.name = name
self.value = value
self.selected = selected
self.annotation = annotation
self.sub_menu = sub_menu