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# (C) Copyright 2004-2023 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!
# Test for TextEditor 'invalid' trait.
#
# Look for:
#
# background color should be correctly to the error indicating color
# whenever the name is invalid (all whitespace). In particular:
#
# background color should be set at initialization.
from traits.api import Bool, HasTraits, Property, Str
from traitsui.api import Item, View
from traitsui.api import TextEditor
class Person(HasTraits):
name = Str()
invalid = Property(Bool, observe='name')
def _get_invalid(self):
# Name is valid iff it doesn't consist entirely of whitespace.
stripped_name = self.name.strip()
return stripped_name == ''
traits_view = View(
Item('name', editor=TextEditor(invalid='invalid')),
)
if __name__ == '__main__':
Person().configure_traits()
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