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- import pygame
- import sys
- from pygame.locals import *
- pygame.init()
- size = width,height=800,600
- bg = (255,255,255)
- clock = pygame.time.Clock()
- screen = pygame.display.set_mode(size)
- pygame.display.set_caption("Danjuan Demo")
- turtle = pygame.image.load(r'D:\\image\dj123.png')
- # 0 -> 未选择,1 -> 选择中,2 -> 完成选择
- select = 0
- select_rect = pygame.Rect(0,0,0,0)
- # 0 -> 未拖拽,1 -> 拖拽中,2 -> 完成拖拽
- drag = 0
- position = turtle.get_rect()
- position.center = width // 2, height // 2
- while True:
- for event in pygame.event.get():
- if event.type == QUIT:
- sys.exit()
-
- elif event.type == MOUSEBUTTONDOWN:
- if event.button == 1:
- # 第一次点击,选择范围
- if select == 0 and drag ==0:
- pos_start = event.pos
-
- select = 1
- # 第二次点击,拖拽图像
- elif select ==2 and drag ==0:
- capture = screen.subsurface(select_rect).copy()
- cap_rect = capture.get_rect()
- drag =1
- # 第三次点击,初始化
- elif select ==2 and drag ==2:
- select = 0
- drag = 0
- elif event.type == MOUSEBUTTONUP:
- if event.button ==1:
- # 第一次释放,结束选择
- if select ==1 and drag ==0:
- pos_stop =event.pos
- select =2
- # 第二次释放,结束拖拽
- if select ==2 and drag ==1:
- drag = 2
- screen.fill(bg)
- screen.blit(turtle,position)
- # 实时绘制选择框:
- if select:
- mouse_pos = pygame.mouse.get_pos()
- if select == 1:
- pos_stop = mouse_pos
- select_rect.left,select_rect.top = pos_start
- select_rect.width,select_rect.height = pos_start[0] - pos_stop[0],pos_start[1] - pos_stop[1]
- pygame.draw.rect(screen,(0,255,0),select_rect,1)
- # 拖拽裁剪的图像
- if drag:
- if drag ==1:
- cap_rect.center = mouse_pos
- screen.blit(capture,cap_rect)
-
- pygame.display.flip()
- clock.tick(30)
复制代码
运行代码后,显示出图片,我准备拖拽的时候,会出现一个选择框,然后报错,如下:
Traceback (most recent call last):
File "C:\Users\user\Desktop\python-yf\__pycache__\03.20.03.py", line 40, in <module>
capture = screen.subsurface(select_rect).copy()
pygame.error: Out of memory
我代码跟小甲鱼对照了一下,应该没问题。请问为什么会报错。。。
2。还有个问题是select_rect.width,select_rect.height = pos_start[0] - pos_stop[0],pos_start[1] - pos_stop[1] ,这个里面的0和1 是什么意思,也没琢磨清楚,请大家不吝赐教 ,谢谢!!
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