如何使pygame窗口透明，同时仍然接收和阻止鼠标点击？

import pygame
import sys

pygame.init()
window = pygame.display.set_mode((800, 600))

window.set_alpha(None)  # 设置窗口完全透明

surface = pygame.Surface((800, 600), pygame.SRCALPHA)
surface.set_alpha(128)  # 设置Surface对象的透明度为128（0为完全透明，255为完全不透明）

pygame.draw.circle(surface, (255, 0, 0), (400, 300), 50)  # 在Surface上绘制一个红色的圆形

window.blit(surface, (0, 0))

pygame.display.update()

pygame.event.set_blocked(pygame.MOUSEBUTTONDOWN)  # 阻止鼠标点击事件
pygame.event.set_allowed(pygame.MOUSEBUTTONUP)  # 允许鼠标释放事件

import pygame
import sys

pygame.init()
window = pygame.display.set_mode((800, 600))
window.set_alpha(None)

surface = pygame.Surface((800, 600), pygame.SRCALPHA)
surface.set_alpha(128)
pygame.draw.circle(surface, (255, 0, 0), (400, 300), 50)

window.blit(surface, (0, 0))
pygame.display.update()

pygame.event.set_blocked(pygame.MOUSEBUTTONDOWN)
pygame.event.set_allowed(pygame.MOUSEBUTTONUP)

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()