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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>
#------------------------------------------------------------------------------
from __future__ import absolute_import
# Enthought library imports.
from pyface.action.api import Action
from traits.api import Any, Callable, Instance
from ..i_command_stack import ICommandStack
class CommandAction(Action):
""" The CommandAction class is an Action class that wraps undo/redo
commands. It is only useful for commands that do not take any arguments or
return any result.
"""
#### 'CommandAction' interface ############################################
# The command to create when the action is performed.
command = Callable
# The command stack onto which the command will be pushed when the action
# is performed.
command_stack = Instance(ICommandStack)
# This is the data on which the command operates.
data = Any
###########################################################################
# 'Action' interface.
###########################################################################
def perform(self, event):
""" This is reimplemented to push a new command instance onto the
command stack.
"""
self.command_stack.push(self.command(data=self.data))
def _name_default(self):
""" This gets the action name from the command. """
if self.command:
name = self.command().name
else:
name = ""
return name
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