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'''
Task Coach - Your friendly task manager
Copyright (C) 2004-2014 Task Coach developers <developers@taskcoach.org>
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
from taskcoachlib.domain import base, date
from wx.lib.pubsub import pub
import task
import tasklist
class ViewFilter(tasklist.TaskListQueryMixin, base.Filter):
def __init__(self, *args, **kwargs):
self.__statusesToHide = set(kwargs.pop('statusesToHide', []))
self.__hideCompositeTasks = kwargs.pop('hideCompositeTasks', False)
self.registerObservers()
super(ViewFilter, self).__init__(*args, **kwargs)
def registerObservers(self):
registerObserver = patterns.Publisher().registerObserver
for eventType in (task.Task.plannedStartDateTimeChangedEventType(),
task.Task.dueDateTimeChangedEventType(),
task.Task.actualStartDateTimeChangedEventType(),
task.Task.completionDateTimeChangedEventType(),
task.Task.prerequisitesChangedEventType(),
task.Task.appearanceChangedEventType(), # Proxy for status changes
task.Task.addChildEventType(),
task.Task.removeChildEventType()):
if eventType.startswith('pubsub'):
pub.subscribe(self.onTaskStatusChange, eventType)
else:
registerObserver(self.onTaskStatusChange_Deprecated,
eventType=eventType)
date.Scheduler().schedule_interval(self.atMidnight, days=1)
def detach(self):
super(ViewFilter, self).detach()
patterns.Publisher().removeObserver(self.onTaskStatusChange_Deprecated)
def atMidnight(self):
''' Whether tasks are included in the filter or not may change at
midnight. '''
self.reset()
def onTaskStatusChange(self, newValue, sender): # pylint: disable=W0613
self.reset()
def onTaskStatusChange_Deprecated(self, event=None): # pylint: disable=W0613
self.reset()
def hideTaskStatus(self, status, hide=True):
if hide:
self.__statusesToHide.add(status)
else:
self.__statusesToHide.discard(status)
self.reset()
def hideCompositeTasks(self, hide=True):
self.__hideCompositeTasks = hide
self.reset()
def filterItems(self, tasks):
return [task for task in tasks if self.filterTask(task)] # pylint: disable=W0621
def filterTask(self, task): # pylint: disable=W0621
result = True
if task.status() in self.__statusesToHide:
result = False
elif self.__hideCompositeTasks and not self.treeMode() and task.children():
result = False # Hide composite task
return result
def hasFilter(self):
return len(self.__statusesToHide) != 0 or (self.__hideCompositeTasks and not self.treeMode())
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