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# (C) Copyright 2005-2025 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!
""" An instance editor that allows total control over widget creation. """
# Enthought library imports.
from traits.api import Any, observe
from traitsui.api import EditorFactory
from traitsui.toolkit import toolkit_object
Editor = toolkit_object('editor:Editor')
class _WidgetEditor(Editor):
""" An instance editor that allows total control over widget creation. """
#### '_WidgetEditor' interface ############################################
# The toolkit-specific parent of the editor.
parent = Any
###########################################################################
# '_WidgetEditor' interface.
###########################################################################
def init(self, parent):
""" Initialize the editor. """
self.parent = parent
# fixme: What if there are no pages?!?
page = self.object.pages[0]
# Create the editor's control.
self.control = page.create_control(parent)
def dispose(self):
""" Dispose of the editor. """
page = self.object.selected_page
page.destroy_control()
def update_editor(self):
""" Update the editor. """
pass
###########################################################################
# Private interface.
###########################################################################
@observe("object:selected_page")
def _handle_change_to_selected_page(self, event):
""" Dynamic trait change handler. """
if event.old is not None:
event.old.destroy_control()
if event.new is not None:
self.control = event.new.create_control(self.parent)
class WidgetEditor(EditorFactory):
""" A factory widget editors. """
###########################################################################
# 'object' interface.
###########################################################################
def __call__(self, *args, **traits):
""" Call the object. """
return self.trait_set(**traits)
###########################################################################
# 'EditorFactory' interface.
###########################################################################
def simple_editor(self, ui, object, name, description, parent):
""" Create a simple editor. """
editor = _WidgetEditor(
parent,
factory=self,
ui=ui,
object=object,
name=name,
description=description,
)
return editor
custom_editor = simple_editor
text_editor = simple_editor
readonly_editor = simple_editor
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