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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!
"""
Display an editable List of Strings.
The ListStrEditor uses a custom ListStrAdapter to define colors and tooltips.
"""
from traitsui.list_str_adapter import ListStrAdapter
from traits.api import HasTraits, List, Str
from traitsui.api import View, Item, ListStrEditor
# -- The adapter ----------------------------------------------------------
class HeadlinesListAdapter(ListStrAdapter):
""" Custom adapter for string lists being edited in the ListStrEditor.
- Style ALL CAPS titles in red.
- Describe the capitalization in the tooltip.
"""
def get_text_color(self, object, trait, row):
try:
row_data = getattr(object, trait)[row]
except IndexError:
return ""
if row_data.isupper():
return "red"
return super().get_text_color(object, trait, row)
def get_tooltip(self, object, trait, row):
try:
row_data = getattr(object, trait)[row]
except IndexError:
# if the ListStr is editable, IndexError indicates the empty next slots
return ""
if row_data.isupper():
return "An uppercase headline"
elif row_data.istitle():
return "A headline in title case"
elif row_data.islower():
return "A fully lowercase headline"
else:
return self.tooltip
# -- The class providing the view -------------------------------------
class HeadlinesListDemo(HasTraits):
headlines = List(Str)
view = View(
Item(
"headlines",
show_label=False,
editor=ListStrEditor(
title="List of headlines (hover for description)",
adapter=HeadlinesListAdapter(
# the default tooltip for generic rows
tooltip="A headline"
),
auto_add=True
),
# (QT only) the tooltip shown in the area outside of rows
# or when the row's tooltip is empty
tooltip="List of headlines"
),
title='List of headlines',
width=320,
height=370,
resizable=True,
)
# -- Set up the Demo ------------------------------------------------------
demo = HeadlinesListDemo(
headlines=[
"Shark bites man",
"MAN BITES SHARK",
"The London Stock Exchange Collapses",
"she sells sea shells on the sea shore"
]
)
# Run the demo (in invoked from the command line):
if __name__ == "__main__":
demo.configure_traits()
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