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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!
""" The interface for a dialog that prompts for a choice from a list. """
from traits.api import Any, HasTraits, List, Str
from pyface.i_dialog import IDialog
class ISingleChoiceDialog(IDialog):
""" The interface for a dialog that prompts for a choice from a list. """
# 'ISingleChoiceDialog' interface -------------------------------------#
#: List of objects to choose from.
choices = List(Any)
#: The object chosen, if any.
choice = Any()
#: An optional attribute to use for the name of each object in the dialog.
name_attribute = Str()
#: The message to display to the user.
message = Str()
class MSingleChoiceDialog(HasTraits):
""" The mixin class that contains common code for toolkit specific
implementations of the IConfirmationDialog interface.
"""
def _choice_strings(self):
""" Returns the list of strings to display in the dialog. """
choices = self.choices
if self.name_attribute != "":
# choices is a list of objects with this attribute
choices = [getattr(obj, self.name_attribute) for obj in choices]
choices = [str(obj) for obj in choices]
if len(choices) == 0:
raise ValueError("SingleChoiceDialog requires at least 1 choice.")
elif len(choices) != len(set(choices)):
raise ValueError(
"Dialog choices {} contain repeated string value." % choices
)
return choices
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