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7_composite.py
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7_composite.py
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# coding : utf-8
# create by ctz on 2017/5/25
from abc import abstractmethod, ABCMeta
#组合模式
class Graphic(metaclass=ABCMeta):
@abstractmethod
def draw(self):
pass
@abstractmethod
def add(self, graphic):
pass
@abstractmethod
def getchildren(self):
pass
class Point(Graphic):
def __init__(self, x, y):
self.x = x
self.y = y
def draw(self):
print(self)
def add(self, graphic):
raise TypeError
def getchildren(self):
raise TypeError
def __str__(self):
return "点(%s, %s)" % (self.x, self.y)
class Line(Graphic):
def __init__(self, p1, p2):
self.p1 = p1
self.p2 = p2
def draw(self):
print(self)
def add(self, graphic):
raise TypeError
def getchildren(self):
raise TypeError
def __str__(self):
return "线段[%s, %s]" % (self.p1, self.p2)
class Picture(Graphic):
def __init__(self):
self.children = []
def add(self, graphic):
self.children.append(graphic)
def getchildren(self):
return self.children
def draw(self):
print("------复合图形------")
for g in self.children:
g.draw()
print("------END------")
pic1 = Picture()
pic1.add(Point(2,3))
pic1.add(Line(Point(1,2), Point(4,5)))
pic1.add(Line(Point(0,1), Point(2,1)))
pic2 = Picture()
pic2.add(Point(-2,-1))
pic2.add(Line(Point(0,0), Point(1,1)))
pic = Picture()
pic.add(pic1)
pic.add(pic2)
pic.draw()