在Pygame中添加垂直和水平滚动条到显示表面

import pygame
from pygame.locals import *
import pygame.scroll as scroll

pygame.init()
width, height = 800, 600
screen = pygame.display.set_mode((width, height))
pygame.display.set_caption("Scrollbars in Pygame")

content_width, content_height = 1000, 1000
content_surface = pygame.Surface((content_width, content_height))
scroll_width, scroll_height = 20, height
scroll_x, scroll_y = width - scroll_width, 0

scrollbar = scroll.Scrollbar(0, 0, content_width, content_height, scroll_width, scroll_height, scroll_x, scroll_y)
scrollbar.set_target(content_surface)

def handle_event(event):
    if event.type == MOUSEBUTTONDOWN:
        if event.button == 4:  # 滚轮向上滚动
            scrollbar.scroll_up()
        elif event.button == 5:  # 滚轮向下滚动
            scrollbar.scroll_down()
    elif event.type == MOUSEMOTION:
        scrollbar.drag(event.rel)
    elif event.type == VIDEORESIZE:
        width, height = event.size
        screen = pygame.display.set_mode((width, height), RESIZABLE)
        scrollbar.update_scrollbar_pos((width - scroll_width, 0))

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

    content_surface.fill((255, 255, 255))  # 清空显示表面
    # 绘制内容到显示表面
    # ...

    screen.blit(content_surface, (0, 0))  # 将内容显示到屏幕
    scrollbar.draw(screen)  # 绘制滚动条
    pygame.display.update()

pygame.quit()