import pygame pygame.init() SCREEN_WIDTH = 640 SCREEN_HEIGHT = 480 screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT)) pygame.display.set_caption("Resize Image") image = pygame.image.load("miaojv.jpg") image_rect = image.get_rect() scale = 1.0 min_scale = 0.5 max_scale = 2.0 while True: for event in pygame.event.get(): if event.type == pygame.QUIT: pygame.quit() exit() elif event.type == pygame.MOUSEBUTTONDOWN: if event.button == 1: # left click scale += 0.1 if scale < min_scale: scale = min_scale elif event.button == 3: # right click scale -= 0.1 if scale > max_scale: scale = max_scale screen.fill((255, 255, 255)) scaled_image = pygame.transform.scale(image, (int(image_rect.width * scale), int(image_rect.height * scale))) screen.blit(scaled_image, (SCREEN_WIDTH // 2 - scaled_image.get_width() // 2, SCREEN_HEIGHT // 2 - scaled_image.get_height() // 2)) pygame.display.flip() 改为左击放大，连续左击缩小

你的代码已经实现了左击放大，右击缩小的功能。如果要实现左击放大，连续左击缩小的效果，可以将代码中以下部分：

if event.button == 1: # left click
    scale += 0.1
    if scale < min_scale:
        scale = min_scale
elif event.button == 3: # right click
    scale -= 0.1
    if scale > max_scale:
        scale = max_scale

修改为：

if event.button == 1: # left click
    if scale < max_scale:
        scale += 0.1
elif event.button == 1 and scale > min_scale: # continue left click to scale down
    scale -= 0.1
    if scale < min_scale:
        scale = min_scale

这样就可以实现左击放大，连续左击缩小的效果了。

相关问题

import pygame import sys pygame.init() SCREEN_WIDTH = 640 SCREEN_HEIGHT = 480 screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT)) pygame.display.set_caption("Resize Image") image = pygame.image.load("miaojv.jpg") image_rect = image.get_rect() scale = 1.0 min_scale = 0.5 max_scale = 10.0 last_click_time = 0 while True: for event in pygame.event.get(): if event.type == pygame.QUIT: pygame.quit() sys.exit() elif event.type == pygame.MOUSEBUTTONDOWN: if event.button == 1: # left click if event.type == pygame.MOUSEBUTTONDOWN and event.button == 1: # single click if pygame.time.get_ticks() - last_click_time < 300: # double click scale -= 1 if scale < min_scale: scale = min_scale else: # single click scale += 1 if scale > max_scale: scale = max_scale last_click_time = pygame.time.get_ticks() last_click_pos = event.pos screen.fill((255, 255, 255)) scaled_image = pygame.transform.scale(image, (int(image_rect.width * scale), int(image_rect.height * scale))) screen.blit(scaled_image, (SCREEN_WIDTH // 2 - scaled_image.get_width() // 2, SCREEN_HEIGHT // 2 - scaled_image.get_height() // 2)) pygame.display.flip() 改为直接从摄像头读取图片

好的，你可以将代码改为从摄像头读取图片并进行缩放显示。下面是修改后的代码：

import cv2
import pygame
import numpy as np

pygame.init()

SCREEN_WIDTH = 640
SCREEN_HEIGHT = 480

screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pygame.display.set_caption("Resize Image")

cap = cv2.VideoCapture(0)

scale = 1.0
min_scale = 0.5
max_scale = 10.0

last_click_time = 0

while True:
    ret, frame = cap.read()
    if not ret:
        continue
    
    # 转换图像格式
    frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
    
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            cap.release()
            cv2.destroyAllWindows()
            pygame.quit()
            exit()
        elif event.type == pygame.MOUSEBUTTONDOWN:
            if event.button == 1: # left click
                if event.type == pygame.MOUSEBUTTONDOWN and event.button == 1: # single click
                    if pygame.time.get_ticks() - last_click_time < 300: # double click
                        scale -= 1
                        if scale < min_scale:
                            scale = min_scale
                    else: # single click
                        scale += 1
                        if scale > max_scale:
                            scale = max_scale
                    last_click_time = pygame.time.get_ticks()
                    last_click_pos = event.pos
    
    # 将图像转换为 Pygame Surface 对象
    surf = pygame.surfarray.make_surface(frame)
    
    # 缩放图像
    scaled_surf = pygame.transform.scale(surf, (int(surf.get_width() * scale), int(surf.get_height() * scale)))
    
    # 显示图像
    screen.fill((255, 255, 255))
    screen.blit(scaled_surf, (SCREEN_WIDTH // 2 - scaled_surf.get_width() // 2, SCREEN_HEIGHT // 2 - scaled_surf.get_height() // 2))
    pygame.display.flip()

这个程序会不断读取摄像头数据，将其转换为 Pygame Surface 对象，然后在 Pygame 窗口中进行缩放显示。你可以通过按下 ESC 键或关闭 Pygame 窗口来退出程序。在程序运行过程中，你可以使用鼠标左键来进行缩放操作。

import pygame pygame.init() SCREEN_WIDTH = 640 SCREEN_HEIGHT = 480 screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT)) pygame.display.set_caption("Resize Image") image = pygame.image.load("miaojv.jpg") image_rect = image.get_rect() scale = 1.0 min_scale = 0.5 max_scale = 2.0 while True: for event in pygame.event.get(): if event.type == pygame.QUIT: pygame.quit() exit() elif event.type == pygame.MOUSEBUTTONDOWN: if event.button == 1: # left click scale += 0.1 if scale < min_scale: scale = min_scale elif event.button == 3: # right click scale -= 0.1 if scale > max_scale: scale = max_scale screen.fill((255, 255, 255)) scaled_image = pygame.transform.scale(image, (int(image_rect.width * scale), int(image_rect.height * scale))) screen.blit(scaled_image, (SCREEN_WIDTH // 2 - scaled_image.get_width() // 2, SCREEN_HEIGHT // 2 - scaled_image.get_height() // 2)) pygame.display.flip() 改为左击放大，双击缩小

你可以将代码中以下部分：

if event.button == 1: # left click
    scale += 0.1
    if scale < min_scale:
        scale = min_scale
elif event.button == 3: # right click
    scale -= 0.1
    if scale > max_scale:
        scale = max_scale

修改为：

if event.button == 1: # left click
    if event.type == pygame.MOUSEBUTTONDOWN and event.button == 1: # single click
        scale += 0.1
        if scale > max_scale:
            scale = max_scale
    elif event.type == pygame.MOUSEBUTTONDOWN and event.button == 1 and event.pos == last_click_pos: # double click
        scale -= 0.1
        if scale < min_scale:
            scale = min_scale
    last_click_pos = event.pos

这样就可以实现左击放大，双击缩小的效果了。