# Copyright 2017 SrMouraSilva
#
# 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.
from abc import ABCMeta, abstractmethod
[docs]class Component(metaclass=ABCMeta):
def __init__(self, application):
self.application = application
[docs] @abstractmethod
def init(self):
"""
Initialize this component
"""
pass
[docs] def close(self):
"""
Method called when the application is requested to quit.
Classes components must implement to safely finish their
activities.
"""
pass
def controller(self, controller):
return self.application.controller(controller)
[docs] def register_observer(self, observer):
"""
Calls :meth:`.Application.register_observer`.
:param ApplicationObserver observer: The observer who will receive the changes notifications
"""
self.application.register_observer(observer)
[docs] def unregister_observer(self, observer):
"""
Calls :meth:`.Application.unregister_observer`.
:param ApplicationObserver observer: The observer who will not receive further changes notification
"""
self.application.unregister_observer(observer)