Python Turtle库绘制表盘时钟

运行效果：

源代码：

  1 # coding=utf-8
  2
  3 import turtle
  4 from datetime import *
  5
  6 # 抬起画笔，向前运动一段距离放下
  7 def Skip(step):
  8     turtle.penup()
  9     turtle.forward(step)
 10     turtle.pendown()
 11
 12 def mkHand(name, length):
 13     # 注册Turtle形状，建立表针Turtle
 14     turtle.reset()
 15     Skip(-length * 0.1)
 16     # 开始记录多边形的顶点。当前的乌龟位置是多边形的第一个顶点。
 17     turtle.begin_poly()
 18     turtle.forward(length * 1.1)
 19     # 停止记录多边形的顶点。当前的乌龟位置是多边形的最后一个顶点。将与第一个顶点相连。
 20     turtle.end_poly()
 21     # 返回最后记录的多边形。
 22     handForm = turtle.get_poly()
 23     turtle.register_shape(name, handForm)
 24
 25 def Init():
 26     global secHand, minHand, hurHand, printer
 27     # 重置Turtle指向北
 28     turtle.mode("logo")
 29     # 建立三个表针Turtle并初始化
 30     mkHand("secHand", 135)
 31     mkHand("minHand", 125)
 32     mkHand("hurHand", 90)
 33     secHand = turtle.Turtle()
 34     secHand.shape("secHand")
 35     minHand = turtle.Turtle()
 36     minHand.shape("minHand")
 37     hurHand = turtle.Turtle()
 38     hurHand.shape("hurHand")
 39
 40     for hand in secHand, minHand, hurHand:
 41         hand.shapesize(1, 1, 3)
 42         hand.speed(0)
 43
 44     # 建立输出文字Turtle
 45     printer = turtle.Turtle()
 46     # 隐藏画笔的turtle形状
 47     printer.hideturtle()
 48     printer.penup()
 49
 50 def SetupClock(radius):
 51     # 建立表的外框
 52     turtle.reset()
 53     turtle.pensize(7)
 54     for i in range(60):
 55         Skip(radius)
 56         if i % 5 == 0:
 57             turtle.forward(20)
 58             Skip(-radius - 20)
 59
 60             Skip(radius + 20)
 61             if i == 0:
 62                 turtle.write(int(12), align="center", font=("Courier", 14, "bold"))
 63             elif i == 30:
 64                 Skip(25)
 65                 turtle.write(int(i/5), align="center", font=("Courier", 14, "bold"))
 66                 Skip(-25)
 67             elif (i == 25 or i == 35):
 68                 Skip(20)
 69                 turtle.write(int(i/5), align="center", font=("Courier", 14, "bold"))
 70                 Skip(-20)
 71             else:
 72                 turtle.write(int(i/5), align="center", font=("Courier", 14, "bold"))
 73             Skip(-radius - 20)
 74         else:
 75             turtle.dot(5)
 76             Skip(-radius)
 77         turtle.right(6)
 78
 79 def Week(t):
 80     week = ["星期一", "星期二", "星期三",
 81             "星期四", "星期五", "星期六", "星期日"]
 82     return week[t.weekday()]
 83
 84 def Date(t):
 85     y = t.year
 86     m = t.month
 87     d = t.day
 88     return "%s年%d月%d日" % (y, m, d)
 89
 90 def Tick():
 91     # 绘制表针的动态显示
 92     t = datetime.today()
 93     second = t.second + t.microsecond * 0.000001
 94     minute = t.minute + second / 60.0
 95     hour = t.hour + minute / 60.0
 96     secHand.setheading(6 * second)
 97     minHand.setheading(6 * minute)
 98     hurHand.setheading(30 * hour)
 99
100     turtle.tracer(False)
101     printer.forward(65)
102     printer.write(Week(t), align="center",
103                   font=("Courier", 14, "bold"))
104     printer.back(130)
105     printer.write(Date(t), align="center",
106                   font=("Courier", 14, "bold"))
107     printer.home()
108     turtle.tracer(True)
109
110     # 100ms后继续调用tick
111     turtle.ontimer(Tick, 100)
112
113 def main():
114     # 打开/关闭龟动画，并为更新图纸设置延迟。
115     turtle.tracer(False)
116     Init()
117     SetupClock(160)
118     turtle.tracer(True)
119     Tick()
120     turtle.mainloop()
121
122 if __name__ == "__main__":
123     main()