1.内容简介

本篇文章将使用pygame实现一个名为Analog Color的时钟示例程序.

2.代码示例

#coding=utf-8

import sys
import random
import math
import pygame
import time as delay
import datetime
from pygame.locals import *
from datetime import datetime,date,time

#打印文字的函数
def print_text(font, x, y, text, color=(255,255,255)):
    imageText = font.render(text, True, color)
    screen.blit(imageText, (x,y))

#将角度控制在360度范围内
def wrap_angle(angle):
    return angle % 360

#初始化
pygame.init()
screen = pygame.display.set_mode((600,500))
pygame.display.set_caption("Analog Clock Demo")
font = pygame.font.Font(None, 36)
orange = 220,180,0
white = 255,255,255
yellow = 255,255,0
pink = 255,100,100

pos_x = 300
pos_y = 250
radius = 250
angle = 360

while True:

    #监听退出事件
    for event in pygame.event.get():
        if event.type == QUIT:
            sys.exit()

    keys = pygame.key.get_pressed()
    if keys[K_ESCAPE]:
        sys.exit()

    screen.fill((0,0,100))

    #绘制时钟外框
    pygame.draw.circle(screen, white, (pos_x, pos_y), radius, 6)

    #绘制时钟上的数字
    for n in range(1,13):
        angle = math.radians(n*(360/12)-90)
        x = math.cos(angle)*(radius-20)-10
        y = math.sin(angle)*(radius-20)-10
        print_text(font, pos_x+x, pos_y+y, str(n))

    today = datetime.today()
    hours = today.hour % 12
    minutes = today.minute
    seconds = today.second

    #绘制时针
    hour_angle = wrap_angle(hours*(360/12)-90)
    hour_angle = math.radians(hour_angle)
    hour_x = math.cos(hour_angle) * (radius-80)
    hour_y = math.sin(hour_angle) * (radius-80)
    target = (pos_x+hour_x,pos_y+hour_y)
    pygame.draw.line(screen, pink, (pos_x,pos_y), target, 25)

    #绘制分针
    min_angle = wrap_angle(minutes*(360/60)-90)
    min_angle = math.radians(min_angle)
    min_x = math.cos(min_angle) * (radius-60)
    min_y = math.sin(min_angle) * (radius-60)
    target = (pos_x+min_x,pos_y+min_y)
    pygame.draw.line(screen, orange, (pos_x,pos_y), target, 12)

    #绘制秒针
    sec_angle = wrap_angle(seconds * (360/60) - 90)
    sec_angle = math.radians(sec_angle)
    sec_x = math.cos(sec_angle) * (radius-40)
    sec_y = math.sin(sec_angle) * (radius-40)
    target = (pos_x+sec_x,pos_y+sec_y)
    pygame.draw.line(screen, yellow, (pos_x,pos_y), target, 6)

    pygame.draw.circle(screen, white, (pos_x,pos_y), 20)

    #打印数字时间
    print_text(font, 0, 0, str(hours) + ":" + str(minutes) + ":" + str(seconds))

    #更新画布
    pygame.display.update()

    #延时处理
    delay.sleep(1.0/60)

3.示例演示

捕获.PNG