Source code for bokeh.colors.color

#-----------------------------------------------------------------------------
# Copyright (c) 2012 - 2017, Anaconda, Inc. All rights reserved.
#
# Powered by the Bokeh Development Team.
#
# The full license is in the file LICENSE.txt, distributed with this software.
#-----------------------------------------------------------------------------
''' Provide a base class for representing color values.

'''

#-----------------------------------------------------------------------------
# Boilerplate
#-----------------------------------------------------------------------------
from __future__ import absolute_import, division, print_function, unicode_literals

import logging
log = logging.getLogger(__name__)

from bokeh.util.api import general, dev ; general, dev

#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------

# Standard library imports

# External imports

# Bokeh imports

#-----------------------------------------------------------------------------
# Globals and constants
#-----------------------------------------------------------------------------

#-----------------------------------------------------------------------------
# General API
#-----------------------------------------------------------------------------

@general((1,0,0))
[docs]class Color(object): ''' A base class for representing color objects. ''' def __repr__(self): return self.to_css() @staticmethod @general((1,0,0))
[docs] def clamp(value, maximum=None): ''' Clamp numeric values to be non-negative, an optionally, less than a given maximum. Args: value (float) : A number to clamp. maxiumum (float, optional) : A max bound to to clamp to. If None, there is no upper bound, and values are only clamped to be non-negative. (default: None) Returns: float ''' value = max(value, 0) if maximum is not None: return min(value, maximum) else: return value
@general((1,0,0))
[docs] def copy(self): ''' Copy this color. *Subclasses must implement this method.* ''' raise NotImplementedError
@general((1,0,0))
[docs] def darken(self, amount): ''' Darken (reduce the luminance) of this color. Args: amount (float) : Amount to reduce the luminance by (clamped above zero) Returns: Color ''' hsl = self.to_hsl() hsl.l = self.clamp(hsl.l - amount) return self.from_hsl(hsl)
@classmethod @general((1,0,0))
[docs] def from_hsl(cls, value): ''' Create a new color by converting from an HSL color. *Subclasses must implement this method.* Args: value (HSL) : A color to convert from HSL Returns: Color ''' raise NotImplementedError
@classmethod @general((1,0,0))
[docs] def from_rgb(cls, value): ''' Create a new color by converting from an RGB color. *Subclasses must implement this method.* Args: value (:class:`~bokeh.colors.rgb.RGB`) : A color to convert from RGB Returns: Color ''' raise NotImplementedError
@general((1,0,0))
[docs] def lighten(self, amount): ''' Lighten (increase the luminance) of this color. Args: amount (float) : Amount to increase the luminance by (clamped above zero) Returns: Color ''' hsl = self.to_hsl() hsl.l = self.clamp(hsl.l + amount, 1) return self.from_hsl(hsl)
@general((1,0,0))
[docs] def to_css(self): ''' Return a CSS representation of this color. *Subclasses must implement this method.* Returns: str ''' raise NotImplementedError
@general((1,0,0))
[docs] def to_hsl(self): ''' Create a new HSL color by converting from this color. *Subclasses must implement this method.* Returns: HSL ''' raise NotImplementedError
@general((1,0,0))
[docs] def to_rgb(self): ''' Create a new HSL color by converting from this color. *Subclasses must implement this method.* Returns: :class:`~bokeh.colors.rgb.RGB` ''' raise NotImplementedError
#----------------------------------------------------------------------------- # Dev API #----------------------------------------------------------------------------- #----------------------------------------------------------------------------- # Private API #----------------------------------------------------------------------------- #----------------------------------------------------------------------------- # Code #-----------------------------------------------------------------------------