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import colorsys
class ColorException(Exception):
pass
class Color(object):
def __init__(self, r, g, b, a=1):
self.r = r
self.g = g
self.b = b
self.a = a
self.validate_all()
@classmethod
def hsv(cls, h, s, v, a=1):
r, g, b = colorsys.hsv_to_rgb(h, s, v)
return cls(r, g, b, a)
def __str__(self):
return '<Color {}>'.format(self.rgba_web())
def validate_all(self):
self.validate('r')
self.validate('g')
self.validate('b')
self.validate('a')
def validate(self, attr):
v = getattr(self, attr)
if not 0 <= v <= 1:
raise ColorException('{} out of range 0 to 1: {}'.format(attr, v))
@property
def r255(self):
return int(self.r * 255)
@property
def g255(self):
return int(self.g * 255)
@property
def b255(self):
return int(self.b * 255)
@property
def a255(self):
return int(self.a * 255)
def rgb_web(self):
'''Returns a string with the RGB components as a HTML hex string.'''
return '#{0.r255:02x}{0.g255:02x}{0.b255:02x}'.format(self)
def rgba_web(self):
'''Returns a string with the RGBA components as a HTML hex string.'''
return '{0}{1.a255:02x}'.format(self.rgb_web(), self)
def rgb_csv(self):
'''Returns a string with the RGB components as CSV.'''
return '{0.r255},{0.g255},{0.b255}'.format(self)
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