绘制应用程序 - Python

Question

我正在尝试在pygame中制作一个画笔游戏。我完成了绘画，但我希望用户单击图像，这将改变画笔的画笔。如果用户单击蓝色图像，画笔将变为蓝色。到目前为止，我已经设法显示蓝色图像，并且我有一个默认的红色画笔。仅当触摸蓝色图像的位置时，画笔颜色才会更改。我希望当用户单击屏幕的任何其他区域时，画笔颜色保持不变。

有什么建议吗？

这是我的代码：

import sys, pygame
from pygame.locals import *

pygame.init()
screen = pygame.display.set_mode((1000,600))
screen.fill((255,255,255))
brush = pygame.image.load("redbrush.png")
brush = pygame.transform.scale(brush,(45,45))
brush2 = pygame.image.load("bluebrush.png")
brush2 = pygame.transform.scale(brush2,(45,45))

pygame.display.update()
clock = pygame.time.Clock()
z = 0
while 1:
    screen.blit(brush2, (0,10))
    pygame.display.update()
    clock.tick(60)
    x,y = pygame.mouse.get_pos()

    for event in pygame.event.get():
        if event.type ==pygame.QUIT:
            pygame.quit()
            sys.exit() 
        elif event.type ==MOUSEBUTTONDOWN:
            z=1
        elif event.type ==MOUSEBUTTONUP:
            z=0
        if z==1:
            screen.blit(brush, (x -23.5,y-23.5))
            pygame.display.update()
            if brush2.get_rect().collidepoint(pygame.mouse.get_pos()):
                screen.blit(brush2, (x -23.5,y-23.5))
                pygame.display.update()

Answer 1

替换您的行：

if brush2.get_rect().collidepoint(pygame.mouse.get_pos()):
    screen.blit(brush2, (x -23.5,y-23.5))
    pygame.display.update()

跟：

if brush2.get_rect().collidepoint(pygame.mouse.get_pos()):
    (brush, brush2) = (brush2, brush) # swaps brush and brush2
    pygame.display.update()

编辑：

我看到了您的评论，这是您代码的编辑版本：

import sys, pygame
from pygame.locals import *
pygame.init()
screen = pygame.display.set_mode((1000,600))
screen.fill((255,255,255))
brush1 = pygame.image.load("redbrush.png")
brush1 = pygame.transform.scale(brush1,(45,45))
pos1 = (0, 32)
brush2 = pygame.image.load("bluebrush.png")
brush2 = pygame.transform.scale(brush2,(45,45))
brush2 = pygame.transform.scale(brush2,(45,45))
pos2 = (0, 64)
brush = brush1
pygame.display.update()
clock = pygame.time.Clock()
z = 0
while 1:
    screen.blit(brush1, pos1)
    screen.blit(brush2, pos2)
    pygame.display.update()
    clock.tick(60)
    x,y = pygame.mouse.get_pos()
    for event in pygame.event.get():
        if event.type ==pygame.QUIT:
            pygame.quit()
            sys.exit() 
        elif event.type ==MOUSEBUTTONDOWN:
            z=1
        elif event.type ==MOUSEBUTTONUP:
            z=0
        if z==1:
            if brush1.get_rect(center=pos1).collidepoint(pygame.mouse.get_pos()):
                brush = brush1
            if brush2.get_rect(center=pos2).collidepoint(pygame.mouse.get_pos()):
                brush = brush2
            screen.blit(brush, (x -23.5,y-23.5))
            pygame.display.update()