python使用Turtle库绘制动态钟表

Python函数库众多,而且在不断更新,所以学习这些函数库最有效的方法,就是阅读Python官方文档。同时借助Google和百度。

本文介绍的turtle库对应的官方文档地址

绘制动态钟表的基本思路如下(面向对象的编程):

使用5个turtle对象

1个turtle:绘制外表盘

3个turtle:模拟表针行为

1个turtle:输出表盘上文字

根据实时时间使用ontimer()函数更新表盘画面,显示效果如下:

相关函数的使用在程序中进行了详细的注释,代码如下:

from turtle import *

from datetime import *

def Skip(step):

penup()

forward(step)

pendown()

def mkHand(name, length):

#注册Turtle形状,建立表针Turtle

reset() #清空当前窗口,并重置位置等信息为默认值

Skip(-length*0.1)

begin_poly()

forward(length*1.1)

end_poly()

handForm = get_poly()

register_shape(name, handForm)

def Init():

global secHand, minHand, hurHand, printer

mode("logo")# 重置Turtle指向北

#建立三个表针Turtle并初始化

mkHand("secHand", 135)

mkHand("minHand", 110)

mkHand("hurHand", 90)

secHand = Turtle()

secHand.shape("secHand")

minHand = Turtle()

minHand.shape("minHand")

hurHand = Turtle()

hurHand.shape("hurHand")

for hand in secHand, minHand, hurHand:

hand.shapesize(1, 1, 3)

hand.speed(0)

#建立输出文字Turtle

printer = Turtle()

printer.hideturtle()

printer.penup()

def SetupClock(radius):

#建立表的外框

reset()

pensize(7)

for i in range(60):

Skip(radius)

if i % 5 == 0:

forward(20)

Skip(-radius-20)

else:

dot(5)

Skip(-radius)

right(6)

def Week(t):

week = ["星期一", "星期二", "星期三",

"星期四", "星期五", "星期六", "星期日"]

return week[t.weekday()]

def Date(t):

y = t.year

m = t.month

d = t.day

return "%s %d %d" % (y, m, d)

def Tick():

#绘制表针的动态显示

t = datetime.today()

second = t.second + t.microsecond*0.000001

minute = t.minute + second/60.0

hour = t.hour + minute/60.0

secHand.setheading(6*second) #设置朝向,每秒转动6度

minHand.setheading(6*minute)

hurHand.setheading(30*hour)

tracer(False) #不显示绘制的过程,直接显示绘制结果

printer.forward(65)

printer.write(Week(t), align="center",

font=("Courier", 14, "bold"))

printer.back(130)

printer.write(Date(t), align="center",

font=("Courier", 14, "bold"))

printer.back(50)

printer.write("i_chaoren", align="center",

font=("Courier", 14, "bold"))

printer.home()

tracer(True)

ontimer(Tick, 1000)#1000ms后继续调用tick

def main():

tracer(False) #使多个绘制对象同时显示

Init()

SetupClock(160)

tracer(True)

Tick()

mainloop()

if __name__ == "__main__":

main()

以上是 python使用Turtle库绘制动态钟表 的全部内容, 来源链接: utcz.com/z/324061.html

回到顶部