class Circle:
def __init__(self, radius, point=Point(),
color=Color()):
"""A Circle
>>> circle = Circle(2)
>>> circle
Circle(2, Point(0, 0), Color(111, 111, 111))
"""
self.point = Point(*point.get_tuple)
self.color = Color(*color.get_tuple)
self.radius = radius
@property
def point(self):
return Point(self.__point.x, self.__point.y)
@property
def color(self):
return Color(self.__color.r, self.__color.g, self.__color.b)
@property
def radius(self):
"""The circle's radius
>>> circle = Circle(-2)
Traceback (most recent call last):
...
AssertionError: radius must be nonzero and non-negative
>>> circle = Circle(4)
>>> circle.radius = -1
Traceback (most recent call last):
...
AssertionError: radius must be nonzero and non-negative
>>> circle.radius = 6
"""
return self.__radius
@property
def edge_distance_from_origin(self):
"""The distance of the circle's edge from the origin
>>> point = Point(3, 4)
>>> circle = Circle(2, point)
>>> circle.edge_distance_from_origin
3.0
"""
return abs(self.point.distance_from_origin - self.radius)
@point.setter
def point(self, point):
self.__point = Point(point.x, point.y)
@color.setter
def color(self, color):
self.__color = Color(color.r, color.g, color.b)
@radius.setter
def radius(self, radius):
assert radius > 0, "radius must be nonzero and non-negative"
self.__radius = radius
def __eq__(self, other):
return (self.point == other.point and self.color == other.color and
self.radius == other.radius)
def __repr__(self):
return ("{0.__class__.__name__}({0.radius!r}, {1}, {2})".format(
self, self.point.__repr__(), self.color.__repr__()))
def __str__(self):
line = self.point + ' ' + self.color + ' ' + str(self.radius)
return line
def draw(self, screen):
pygame.draw.circle(screen, self.color.get_tuple,
(int(self.point.x), int(self.point.y)),
self.radius)
