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# (C) Copyright 2005-2023 Enthought, Inc., Austin, TX
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in 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!
""" A wizard model that can be chained with other wizards. """
from traits.api import Instance, observe
from .i_wizard import IWizard
from .wizard import Wizard
class ChainedWizard(Wizard):
""" A wizard model that can be chained with other wizards. """
# 'ChainedWizard' interface --------------------------------------------
# The wizard following this wizard in the chain.
next_wizard = Instance(IWizard)
# ------------------------------------------------------------------------
# 'ChainedWizard' interface.
# ------------------------------------------------------------------------
# Trait handlers. -----------------------------------------------------#
def _controller_default(self):
""" Provide a default controller. """
from .chained_wizard_controller import ChainedWizardController
return ChainedWizardController()
# Trait event handlers. ------------------------------------------------
# Static ----
@observe("next_wizard")
def _reset_next_controller_and_update(self, event):
""" Handle the next wizard being changed. """
if event.new is not None:
self.controller.next_controller = event.new.controller
if self.control is not None:
# FIXME: Do we need to call _create_buttons? Buttons would have
# added when the main dialog area was created (for the first
# wizard), and calling update should update the state of these
# buttons. Do we need to check if buttons are already present in
# the dialog area? What is use case for calling _create_buttons?
# self._create_buttons(self.control)
self._update()
@observe("controller")
def _reset_traits_on_controller_and_update(self, event):
""" handle the controller being changed. """
if event.new is not None and self.next_wizard is not None:
self.controller.next_controller = self.next_wizard.controller
if self.control is not None:
self._update()
return
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