如何将图像或图标添加到 Pygame 中的按钮矩形？

Question

我是 Pygame 的新手，我已经为我的按钮创建了代码，但我仍然有一个问题，因为我不知道如何在矩形中放置图像而不是纯色红色。这是我的代码，希望你能帮到你！

def button(x, y, w, h, ic, ac, action=None):
    mouse = pygame.mouse.get_pos()
    click = pygame.mouse.get_pressed()

    if x + w > mouse[0] > x and y + h > mouse[1] > y: 
        pygame.draw.rect(screen, ac, (x, y, w, h))
        if click[0] == 1 and action!= None:
            if action == "continue":
                quiz()

    else:
        pygame.draw.rect(screen, ic, (x, y, w, h))  
    pygame.display.update()

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

    screen.blit(randomList, [0, 0])
    button(399, 390, 300, 50, red, brightRed, "continue")
    pygame.display.update()

Answer 1

你所要做的就是加载一张图片：

my_image = pygame.image.load('my_image.png').convert_alpha()

而blit它位于矩形的顶部：

def button(x, y, w, h, ic, ac, img, imgon, action=None):
    mouse = pygame.mouse.get_pos()
    click = pygame.mouse.get_pressed()

    rect = pygame.Rect(x, y, w, h)
    on_button = rect.collidepoint(mouse)
    if on_button:
        pygame.draw.rect(screen, ac, rect)
        screen.blit(imgon, imgon.get_rect(center = rect.center))
    else:
        pygame.draw.rect(screen, ic, rect)
        screen.blit(img, img.get_rect(center = rect.center))

    if on_button:  
        if click[0] == 1 and action!= None:
            if action == "continue":
                quiz()

image = pygame.image.load('my_image.png').convert_alpha()
imageOn = pygame.image.load('my_image_on.png').convert_alpha()
while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            quit()

    screen.blit(randomList, [0, 0])
    button(399, 390, 300, 50, red, brightRed, image, imageOn, "continue")
    pygame.display.update()

---

在 pygame 中，按钮只不过是一个 pygame.Surface 对象。按钮上是文本还是图像完全无关紧要。我建议用pygame.sprite.Sprite 对象来表示按钮。

另见Pygame mouse clicking detection，分别为Mouse和Sprite。

小例子：

import pygame

class SpriteObject(pygame.sprite.Sprite):
    def __init__(self, x, y, filename):
        super().__init__() 
        img = pygame.image.load(filename).convert_alpha()
        self.original_image = pygame.Surface((70, 70))
        self.original_image.blit(img, img.get_rect(center = self.original_image.fill((127, 127, 127)).center))
        self.hover_image = pygame.Surface((70, 70))
        self.hover_image.blit(img, img.get_rect(center = self.hover_image.fill((228, 228, 228)).center))
        self.image = self.original_image 
        self.rect = self.image.get_rect(center = (x, y))
        self.hover = False

    def update(self):
        self.hover = self.rect.collidepoint(pygame.mouse.get_pos())
        self.image = self.hover_image if self.hover else self.original_image

pygame.init()
window = pygame.display.set_mode((300, 300))
clock = pygame.time.Clock()

group = pygame.sprite.Group([
    SpriteObject(window.get_width() // 3, window.get_height() // 3, 'Apple64.png'),
    SpriteObject(window.get_width() * 2 // 3, window.get_height() // 3, 'Banana64.png'),
    SpriteObject(window.get_width() // 3, window.get_height() * 2 // 3, 'Pear64.png'),
    SpriteObject(window.get_width() * 2// 3, window.get_height() * 2 // 3, 'Plums64.png'),
])

run = True
while run:
    clock.tick(60)
    event_list = pygame.event.get()
    for event in event_list:
        if event.type == pygame.QUIT:
            run = False 

    group.update()

    window.fill(0)
    group.draw(window)
    pygame.display.flip()

pygame.quit()
exit()