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# (C) Copyright 2008-2023 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!
# ------------------------------------------------------------------------------
# Copyright (c) 2007, Riverbank Computing Limited
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD license.
# However, when used with the GPL version of PyQt the additional terms
# described in the PyQt GPL exception also apply
#
# Author: Riverbank Computing Limited
# ------------------------------------------------------------------------------
""" Trait definition for a PyQt-based color.
"""
from ast import literal_eval
from pyface.qt import QtGui
from pyface.color import Color as PyfaceColor
from pyface.util.color_helpers import channels_to_ints
from pyface.util.color_parser import color_table
from traits.api import Trait, TraitError
def convert_to_color(object, name, value):
"""Converts a number into a QColor object."""
# Try the toolkit agnostic format.
try:
tup = literal_eval(value)
except Exception:
tup = value
if isinstance(value, str):
# Allow for spaces in the string value.
value = value.replace(" ", "")
# is it in the color table?
if value in color_table:
tup = channels_to_ints(color_table[value])
if isinstance(tup, tuple):
if 3 <= len(tup) <= 4 and all(isinstance(x, int) for x in tup):
try:
color = QtGui.QColor(*tup)
except Exception:
raise TraitError
else:
raise TraitError
elif isinstance(value, PyfaceColor):
color = value.to_toolkit()
else:
# Let the standard ctors handle the value.
try:
color = QtGui.QColor(value)
except TypeError:
raise TraitError
if not color.isValid():
raise TraitError
return color
convert_to_color.info = (
"a string of the form (r,g,b) or (r,g,b,a) where r, "
"g, b, and a are integers from 0 to 255, a QColor "
"instance, a Qt.GlobalColor, an integer which in hex "
"is of the form 0xRRGGBB, a string of the form #RGB, "
"#RRGGBB, #RRRGGGBBB or #RRRRGGGGBBBB"
)
# -------------------------------------------------------------------------
# Standard colors:
# -------------------------------------------------------------------------
standard_colors = {}
for name, rgba in color_table.items():
rgba_bytes = channels_to_ints(rgba)
standard_colors[str(name)] = QtGui.QColor(*rgba_bytes)
# -------------------------------------------------------------------------
# Callable that returns an instance of the PyQtToolkitEditorFactory for color
# editors.
# -------------------------------------------------------------------------
### FIXME: We have declared the 'editor' to be a function instead of the
# traitsui.qt.color_editor.ToolkitEditorFactory class, since the
# latter is leading to too many circular imports. In the future, try to see if
# there is a better way to do this.
def get_color_editor(*args, **traits):
from traitsui.qt.color_editor import ToolkitEditorFactory
return ToolkitEditorFactory(*args, **traits)
def PyQtColor(default="white", allow_none=False, **metadata):
"""Defines PyQt-specific color traits."""
if default is None:
allow_none = True
if allow_none:
return Trait(
default,
None,
standard_colors,
convert_to_color,
editor=get_color_editor,
**metadata,
)
return Trait(
default,
standard_colors,
convert_to_color,
editor=get_color_editor,
**metadata,
)
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