wallclock.py

#Fabio Galuppo - http://member.acm.org/~fabiogaluppo - fabiogaluppo@acm.org
#1st version - Mar 2021
#2nd version - Feb 2024 

import pygame
import os
import math
from datetime import datetime

def wallclock():
    def rotate(point, angle, center):
        """ compute rotation in degree """
        angle = math.radians(angle)
        s, c = math.sin(angle), math.cos(angle)
        cx, cy = center
        px, py = point
        px, py = px - cx, py - cy
        x = c * px - s * py 
        y = s * px + c * py
        return int(x + cx), int(y + cy)
    screen_size = width, height = 300, 300
    os.environ['SDL_VIDEO_WINDOW_POS'] = "%d,%d" % (width, height)
    pygame.init()   
    screen = pygame.display.set_mode(screen_size)
    pygame.display.set_caption('Clock')
    clock = pygame.time.Clock()    
    black = (0, 0, 0)
    red = (255, 0, 0)
    yellow = (255, 255, 0)
    green = (0, 255, 0)
    purple = (128, 0, 128)
    while 1:
        if pygame.event.peek():
            ev = pygame.event.wait()
            if ev.type == pygame.QUIT:
                break
            if ev.type == pygame.KEYDOWN and ev.key == pygame.K_ESCAPE:
                break
        now = datetime.now()
        h, m, s, ms = now.hour, now.minute, now.second, now.microsecond / 1000
        pygame.display.set_caption('Clock {:2d}:{:02d}:{:02d}'.format(h % 12, m, s))
        #start-point
        center = (150, 150)
        #end-points
        hourHand, minuteHand, secondHand = (150, 85), (150, 50), (150, 50)
        #compute hand angles
        #smooth
        hourHand = rotate(hourHand, ((h % 12) + m * 0.016667) * 30, center)
        minuteHand = rotate(minuteHand, (m + s * 0.016667) * 6, center)
        secondHand = rotate(secondHand, (s + ms * 0.001) * 6, center)
        #jump
        #hourHand = rotate(hourHand, (h % 12) * 30, center)
        #minuteHand = rotate(minuteHand, m * 6, center)
        #secondHand = rotate(secondHand, s * 6, center)
        #clear screen
        screen.fill(black)
        #drawing order is important!
        pygame.draw.line(screen, red, center, minuteHand, 7)
        pygame.draw.line(screen, green, center, hourHand, 7)
        pygame.draw.line(screen, yellow, center, secondHand, 3)
        pygame.draw.circle(screen, purple, center, 104, 11)
        pygame.draw.circle(screen, purple, center, 7)
        pygame.display.flip()
        clock.tick(15)
    pygame.quit()

if __name__ == "__main__":
    wallclock()