Python论坛的帖子：

Mon Nov 7 13:13:01 HKT 2005

from Tkinter import *
from math import sqrt

canvas = Canvas(bg="white", bd=0)
canvas.pack(fill=BOTH, expand=YES)

class Point:
    def __init__(self, x, y):
        self.x = x
        self.y = y
        self.draw(x, y)
        
    def draw(self, x=None, y=None):
        canvas.create_line(self.x, self.y, self.x, self.y, width=1)
        
class Line:
    def __init__(self, head, tail):
        self.head = head
        self.tail = tail
        dx = self.head.x - self.tail.x
        dy = self.head.y - self.tail.y
        self.length = sqrt(dx*dx + dy*dy)
        self.draw()
        
    def draw(self):
        canvas.create_line(self.head.x, self.head.y,
                           self.tail.x, self.tail.y, width=1)
        
class Polygon:
    def __init__(self,lines):
        self.lines = lines
        self.__perimeter = None
        self.draw()
        
    def draw(self):
        for line in self.lines:
            line.draw()

    def perimeter(self):
        if not self.__perimeter:
            self.__perimeter = 0
            for line in self.lines:
                self.__perimeter += line.length
                if self.lines[0] != self.lines[-1]:
                    p2 = self.lines[0].head
                    p1 = self.lines[-1].tail
                    dx = p2.x - p1.x
                    dy = p2.y - p1.y
                    self.__perimeter += sqrt(dx*dx + dy*dy)
        return self.__perimeter
    
class Route:
    def __init__(self, legs):
        self.legs = legs
        d = 0
        for leg in self.legs:
            d += leg.length
            self.distance = d
            
    def draw(self):
        for leg in self.legs:
            leg.draw()
            
class Map:
    def __init__(self, objects):
        self.objects = objects
        self.draw()
        
    def draw(self):
        for object in self.objects:
            object.draw()

            
p1 = Point(20,30)
p2 = Point(50,50)
p3 = Point(69,105)
p4 = Point(26,64)
line1 = Line(p1,p2)
line2 = Line(p2,p3)
line3 = Line(p3,p1)
line4 = Line(p1,p3)
poly1 = Polygon([line1,line2,line3])
route1 = Route([line2,line2,line3,line4])
map = Map([p1,p2,p3,line1,line2,poly1])

大致是这样，用Canvas画。
======= 2005-11-07 06:56:01 您在来信中写道：=======

>下面的代码可以运行,并且在CONSOLE上出现结果,
>请问如何
>在Tkinter里实现?
>多谢了!
>from math import sqrt
>class Point:
>    def __init__(self,x,y):
>        self.x = x
>        self.y = y
>    def draw(self):
>        print 'point at (%d,%d)'%(self.x,self.y)
>class Line:
>    def __init__(self,head,tail):
>        self.head = head
>        self.tail = tail
>        dx = self.head.x - self.tail.x
>        dy = self.head.y - self.tail.y
>        self.length = sqrt(dx*dx + dy*dy)
>    def draw(self):
>        print 'dawing line'
>        print 'line starts at: '
>        self.head.draw()
>        print 'line ends at: '
>        self.tail.draw()
>class Polygon:
>    def __init__(self,lines):
>        self.lines = lines
>        self.__perimeter = None
>    def draw(self):
>        print 'drawing polygon'
>        print 'poly has %d lines'%len(self.lines)
>        for line in self.lines:
>            line.draw()
>            print 'polygon done'
>    def perimeter(self):
>        if not self.__perimeter:
>            self.__perimeter = 0
>            for line in self.lines:
>                self.__perimeter += line.length
>                if self.lines[0] != self.lines[-1]:
>                    p2 = self.lines[0].head
>                    p1 = self.lines[-1].tail
>                    dx = p2.x - p1.x
>                    dy = p2.y - p1.y
>                    self.__perimeter += sqrt(dx*dx + dy*dy)
>        return self.__perimeter
>class Route:
>    def __init__(self,legs):
>        self.legs = legs
>        d = 0
>        for leg in self.legs:
>            d += leg.length
>            self.distance = d
>    def draw(self):
>        print 'drawing route'
>        for leg in self.legs:
>            leg.draw()
>class Map:
>    def __init__(self,objects):
>        self.objects = objects
>        self.draw()
>    def draw(self):
>        for object in self.objects:
>            object.draw()
>p1 = Point(1,2)
>p2 = Point(3,4)
>p3 = Point(7,8)
>p4 = Point(12,1)
>line1 = Line(p1,p2)
>line2 = Line(p2,p3)
>line3 = Line(p3,p1)
>line4 = Line(p1,p3)
>poly1 = Polygon([line1,line2,line3])
>route1 = Route([line2,line2,line3,line4])
>map = Map([p1,p2,p3,line1,line2,poly1])
>_______________________________________________
>python-chinese list
>python-chinese at lists.python.cn
>http://python.cn/mailman/listinfo/python-chinese
>

= = = = = = = = = = = = = = = = = = = =
			

　　　　　　　　致
礼！
 
				 
　　　　　　　　wangzhe
　　　　　　　　wangzhe at eastcom.com
　　　　　　　　　　2005-11-07

标题：[python-chinese] Tkinter