pygame实现键盘和鼠标事件的处理

keys_pressed = pygame.key.get_pressed()
if keys_pressed[K_SPACE]:
  # 空格键被按下
  fire()      # 发射子弹

import pygame
def tank_play():
  pygame,inite()
  tank_image = pygame.image.load("../images/tank.png")
  tank_rect = tank_image.get_rect()
  back_image = pygame.iamge.load("../images/background2.jpg")
  back_rect = back_image.get_rect()
  screen = pygame.display.set_mode(back_rect.size)
  pygame.display.set_caption("用户方向键控制移动的坦克")
  offset = 2   # 偏移量
  fps_clock = pygame.time.Clock()
  while True:
    fps_clock.tick(60)
    for event in pygame.event.get():
      if event.type == pygame.QUIT:
        pygame.quit()
        exit()
    keys_pressed = pygame.key.get_presssed()
    if keys_pressed[pygame.K_RIGHT]:
      tank_rect.x += offset
    if keys_pressed[pygame.K_LEFT]:
      tank_rect.x -= offset
    if keys_pressed[oygame.K_UP]:
      tank_rect.y -= offset
    if keys_pressed[pygame.K_DOWN]:
      tank_rect.y += offset
    tank_rect.clamp_ip(back_rect)
    screen.blit(back_image, back_rect)
    screen.blit(tank_image, tank_rect)
    pygame.display.update()
      
if __name__ == '__main--':
  tank_play()

from math import pi
from random import randint
import pygame

pygame.init()
screen = pygame.display.set_mode((640, 480))
points = []
while True:
  for event in pygame.event.get():
    if event.type == pygame.QUIT:
      pygame.quit()
      exit()
  	if event.type == pygame.KEYDOWN:
      # 按任意键可清屏，并把点恢复到原始状态
      points = []
      srceen.fill((255, 255, 255))   # 用白色填充窗口背景
    if event.type == pygame.MOUSEBUTTONDOWN:	# 鼠标按下
      screen.fill((255, 255, 255))
      # 画随机矩形
      rc = (255, 0, 0)	# 红色
      rp = (randint(0, 639), randint(0, 479))
      rs = (639 - randint(rp[0], 639), 479 - randint(rp[1], 479))
      pygame.draw.rect(screen, rc, pygame.Rect(rp, rs))
      # 画随机圆形
      rc = (0, 255, 0)	# 绿色
      rp = (randint(0, 639), randint(0, 479))
      rr = randint(1, 200)
      pygame.draw.circle(screen, rc, rp, rr)
      # 获取当前鼠标单击位置
      x, y = pygame.mouse.get_pos()
      points.append((x, y))
      # 根据单击位置画弧线
      angle = (x / 639) * pi * 2
      pygame.draw.arc(screen, (0, 0, 0), (0, 0, 639, 479), 0, angle, 3)
      # 根据单击位置画椭圆
      pygame.draw.ellipse(screen, (0, 255, 0), (0, 0, x, y))
      # 从左上和右下画两根连线到单击位置
      pygame.draw.line(screen, (0, 0, 255), (0, 0), (x, y))
      pygame.draw.line(screen, (255, 0, 0), (640, 480), (x, y))
      # 画单击轨迹图
      if len(points) > 1:
        pygame.draw.lines(screen, (155, 155, 0), points, False, 2)
      # 把鼠标单击的每个点画明显点
      for p in points:
        pygame.draw.circle(screen, (155, 155, 155), p, 3)
	pygame.display.update()