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# coding: UTF-8
# Copyright 2009, 2010 Thomas Jourdan
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import random
import colorsys
import model_random
import model_locus
import exon_color
from gettext import gettext as _
class AnalogousColorGamut(model_locus.Locus):
"""Manages a series of similar colors."""
def __init__(self, trunk):
"""Color gamut constructor."""
super(AnalogousColorGamut, self).__init__(trunk)
self.hue = 0.0
self.range = 0.1
def __eq__(self, other):
"""Equality based on the gamuts components."""
equal = isinstance(other, AnalogousColorGamut) \
and self.hue == other.hue \
and self.range == other.range
return equal
def randomize(self):
"""Set hue.
"""
self.hue = random.random()
self.range = (60.0 / 360.0) * random.random()
def get_randomized_color(self, path):
"""Set red, green, blue and alpha to random values.
"""
deviate = self.range * (random.random() - 0.5)
hue = model_random.cyclic_limit(self.hue + deviate)
lightness = random.random()
saturation = random.random()
alpha = random.random()
rgb = colorsys.hls_to_rgb(hue, lightness, saturation)
color = exon_color.Color(path, rgb[0], rgb[1], rgb[2], alpha)
color.set_base_color(deviate, 0.0, 0.0)
return color
def mutate(self):
"""Make small random changes in hue.
"""
self.hue = model_random.cyclic_limit(self.hue + model_random.jitter(0.1))
self.range += model_random.jitter(0.1)
def adjust_color(self, color):
"""Adjust rgba value to mutated hue and similarity range.
pre: len(color.rgba) == 4
"""
rgba = color.rgba
dummy, lightness, saturation = colorsys.rgb_to_hls(
rgba[0], rgba[1], rgba[2])
deviate = color.base_diff_hue
rgb = colorsys.hls_to_rgb(self.hue + deviate, lightness, saturation)
color.rgba = (rgb[0], rgb[1], rgb[2], rgba[3])
def explain(self, formater):
formater.text_item(_('Analogous color scheme'))
def copy(self):
"""The AnalogousColorGamut copy constructor
# check for distinct references, needs to copy content, not references
post: __return__ is not self
"""
new_one = AnalogousColorGamut(self.get_trunk())
new_one.hue = self.hue
new_one.range = self.range
# new_one.angle = {}
# for key, value in self.angle.items():
# new_one.angle[key] = value
return new_one
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