#! /usr/bin/env python3
# -*- coding: utf-8 -*-
# Copyright 2012-2013, Marten de Vries
#
# This file is part of OpenTeacher.
#
# OpenTeacher 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.
#
# OpenTeacher 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 OpenTeacher. If not, see <http://www.gnu.org/licenses/>.
class LessonTrackerModule:
def __init__(self, moduleManager, *args, **kwargs):
super().__init__(*args, **kwargs)
self._mm = moduleManager
self.type = "lessonTracker"
self.requires = (
self._mm.mods(type="ui"),
)
self.uses = (
self._mm.mods(type="lesson"),
)
@property
def lessons(self):
"""Returns all lesson objects that are open (although they might
be in a tab on the background.).
"""
return list(self._lessons.values())
@property
def currentLesson(self):
"""Returns the lesson object the user is currently working with
in the user interface.
"""
try:
return self._lessons[self._uiModule.currentFileTab]
except KeyError:
return
def _lessonAdded(self, lesson):
self._lessons[lesson.fileTab] = lesson
lesson.stopped.handle(
lambda: self._removeLesson(lesson.fileTab)
)
self.lessonChanged.send()
def _removeLesson(self, fileTab):
del self._lessons[fileTab]
def enable(self):
self._modules = set(self._mm.mods(type="modules")).pop()
self._uiModule = self._modules.default("active", type="ui")
self._lessons = {}
#Keeps track of all created lessons
for module in self._mm.mods("active", type="lesson"):
module.lessonCreated.handle(self._lessonAdded)
self.lessonChanged = self._modules.default(type="event").createEvent()
self.lessonChanged.__doc__ = "Tells you when ``currentLesson`` changes."
self._uiModule.tabChanged.handle(self.lessonChanged.send)
self.active = True
def disable(self):
self.active = False
self._uiModule.tabChanged.unhandle(self.lessonChanged.send)
del self._modules
del self._uiModule
del self._lessons
del self.lessonChanged
#Keeps track of all created lessons
for module in self._mm.mods("active", type="lesson"):
module.lessonCreated.unhandle(self._lessonAdded)
def init(moduleManager):
return LessonTrackerModule(moduleManager)