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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!
from traits.api import Constant, HasTraits, Instance
from .action import Action
class TraitsUIWidgetAction(Action):
""" A widget action containing a TraitsUI.
If a object is supplied, then the UI is generated from the object's view,
otherwise the ui is generated on using the Action object.
Notes
-----
This is currently only supported by the Qt backend.
"""
# TraitsUIWidgetAction traits -------------------------------------------
#: The underlying traits model to be displayed, or None.
model = Instance(HasTraits)
# Action traits ---------------------------------------------------------
#: This is a widget action.
style = Constant("widget")
# ------------------------------------------------------------------------
# Action interface
# ------------------------------------------------------------------------
def create_control(self, parent):
""" Called when creating a "widget" style action.
This constructs an TraitsUI subpanel-based control. It does no binding
to the `perform` method.
Parameters
----------
parent : toolkit control
The toolkit control, usually a toolbar.
Returns
-------
control : toolkit control
A toolkit control or None.
"""
ui = self.edit_traits(kind="subpanel", parent=parent)
control = ui.control
control._ui = ui
return control
# ------------------------------------------------------------------------
# HasTraits interface
# ------------------------------------------------------------------------
def trait_context(self):
""" Use the model object for the Traits UI context, if appropriate.
"""
if self.model is not None:
context = {"object": self.model, "action": self}
return context
return super().trait_context()
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