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# Copyright (c) 2010-18, Enthought, Inc.
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in enthought/LICENSE.txt and may be redistributed only
# under the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
# Thanks for using Enthought open source!
# Enthought library imports.
from pyface.action.api import Action, ActionItem, Group
from traits.api import Any, List, Instance, Property, Unicode, on_trait_change
# Local imports.
from pyface.tasks.task import Task
from pyface.tasks.task_window import TaskWindow
class TaskToggleAction(Action):
""" An action for activating a task.
"""
#### 'Action' interface ###################################################
#: The user-visible name of the action, matches the task name.
name = Property(Unicode, depends_on='task.name')
#: The action is a toggle menu item.
style = 'toggle'
#: The tooltip to display for the menu item.
tooltip = Property(Unicode, depends_on='name')
#### 'TaskActivateAction' interface #######################################
task = Instance(Task)
###########################################################################
# 'Action' interface.
###########################################################################
def destroy(self):
super(TaskToggleAction, self).destroy()
# Make sure that we are not listening to changes in the task anymore
# In traits style, we will set the basic object to None and have the
# listener check that if it is still there.
self.task = None
def perform(self, event=None):
window = self.task.window
window.activate_task(self.task)
###########################################################################
# Private interface.
###########################################################################
def _get_name(self):
if self.task is None:
return 'UNDEFINED'
return self.task.name
def _get_tooltip(self):
return u'Switch to the %s task.' % self.name
@on_trait_change('task.window.active_task')
def _update_checked(self):
if self.task:
window = self.task.window
self.checked = (
window is not None and window.active_task == self.task
)
class TaskToggleGroup(Group):
""" A menu for changing the active task in a task window.
"""
#### 'ActionManager' interface ############################################
id = 'TaskToggleGroup'
items = List
#### 'TaskChangeMenuManager' interface ####################################
# The ActionManager to which the group belongs.
manager = Any
# The window that contains the group.
window = Instance(TaskWindow)
###########################################################################
# Private interface.
###########################################################################
def _get_items(self):
items = []
if len(self.window.tasks) > 1:
# at least two tasks, so something to toggle
items = [
ActionItem(
action=TaskToggleAction(task=task),
) for task in self.window.tasks
]
return items
def _rebuild(self):
# Clear out the old group, then build the new one.
self.destroy()
self.items = self._get_items()
# Inform our manager that it needs to be rebuilt.
self.manager.changed = True
#### Trait initializers ###################################################
def _items_default(self):
self.window.on_trait_change(self._rebuild, 'tasks[]')
return self._get_items()
def _manager_default(self):
manager = self
while isinstance(manager, Group):
manager = manager.parent
return manager
def _window_default(self):
return self.manager.controller.task.window
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