'''
Task Coach - Your friendly task manager
Copyright (C) 2004-2009 Frank Niessink <frank@niessink.com>
Task Coach is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Task Coach is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
'''
from taskcoachlib import patterns
class Attribute(object):
def __init__(self, value, owner, setEvent):
self.__value = value
self.__owner = owner
self.__setEvent = setEvent
def get(self):
return self.__value
def set(self, value, event=None):
if value == self.__value:
return
notify = event is None
event = event or patterns.Event()
self.__value = value
self.__setEvent(event)
if notify:
event.send()
class SetAttribute(object):
def __init__(self, values, owner, addEvent, removeEvent):
self.__set = set(values) if values else set()
self.__owner = owner
self.__addEvent = addEvent
self.__removeEvent = removeEvent
def get(self):
return self.__set.copy()
def set(self, values, event=None):
if values == self.__set:
return
notify = event is None
event = event or patterns.Event()
added = values - self.__set
removed = self.__set - values
self.__set = values
if added:
self.__addEvent(event, *added) # pylint: disable-msg=W0142
if removed:
self.__removeEvent(event, *removed) # pylint: disable-msg=W0142
if notify:
event.send()
def add(self, values, event=None):
if values <= self.__set:
return
notify = event is None
event = event or patterns.Event()
self.__set |= values
self.__addEvent(event, *values) # pylint: disable-msg=W0142
if notify:
event.send()
def remove(self, values, event=None):
if values & self.__set == set():
return
notify = event is None
event = event or patterns.Event()
self.__set -= values
self.__removeEvent(event, *values) # pylint: disable-msg=W0142
if notify:
event.send()
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