Source code for pyface.undo.action.undo_action

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# ------------------------------------------------------------------------------
# Copyright (c) 2007, Riverbank Computing Limited
# 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!
#
# Author: Riverbank Computing Limited
# Description: <Enthought undo package component>
# ------------------------------------------------------------------------------

# Local imports.
from .abstract_command_stack_action import AbstractCommandStackAction


[docs]class UndoAction(AbstractCommandStackAction): """ An action that undos the last command of the active command stack. """ ########################################################################### # 'Action' interface. ###########################################################################
[docs] def perform(self, event): """ Perform the action. """ self.undo_manager.undo()
########################################################################### # 'AbstractUndoAction' interface. ########################################################################### def _update_action(self): """ Update the state of the action. """ name = self.undo_manager.undo_name if name: name = "&Undo " + name self.enabled = True else: name = "&Undo" self.enabled = False self.name = name