当鼠标不动时，Pygame窗口冻结

import pygame
from pygame.locals import *

pygame.init()

# 设置窗口大小
screen_width = 800
screen_height = 600
screen = pygame.display.set_mode((screen_width, screen_height))
pygame.display.set_caption("Pygame Window Freeze Example")

clock = pygame.time.Clock()

running = True
while running:
    for event in pygame.event.get():
        if event.type == QUIT:
            running = False

    # 处理鼠标事件
    mouse_pos = pygame.mouse.get_pos()
    if pygame.mouse.get_rel() == (0, 0):
        # 鼠标停止移动时的处理逻辑
        # 可以在这里添加相应的代码来冻结窗口

    # 游戏逻辑更新
    # ...

    # 绘制游戏界面
    screen.fill((255, 255, 255))
    # ...

    pygame.display.flip()
    clock.tick(60)

pygame.quit()