Question

我想知道如何编写可以检测鼠标点击精灵的代码。例如：

if #Function that checks for mouse clicked on Sprite:
    print ("You have opened a chest!")

Answer 1

我假设你的游戏有一个主循环，所有精灵都在一个名为sprites的列表中。

在主循环中，获取所有活动，并检查MOUSEBUTTONDOWN或MOUSEBUTTONUP事件。

while ... # your main loop
  # get all events
  ev = pygame.event.get()

  # proceed events
  for event in ev:

    # handle MOUSEBUTTONUP
    if event.type == pygame.MOUSEBUTTONUP:
      pos = pygame.mouse.get_pos()

      # get a list of all sprites that are under the mouse cursor
      clicked_sprites = [s for s in sprites if s.rect.collidepoint(pos)]
      # do something with the clicked sprites...

所以基本上你必须在mainloop的每次迭代中检查一个sprite的点击。您需要使用mouse.get_pos()和rect.collidepoint()。

Pygame不提供事件驱动编程，例如cocos2d确实如此。

另一种方法是检查鼠标光标的位置和按下按钮的状态，但这种方法存在一些问题。

if pygame.mouse.get_pressed()[0] and mysprite.rect.collidepoint(pygame.mouse.get_pos()):
  print ("You have opened a chest!")

如果你处理了这种情况，你将不得不引入某种旗帜，因为否则这段代码将打印“你已经打开了一个箱子！”主循环的每次迭代。

handled = False

while ... // your loop

  if pygame.mouse.get_pressed()[0] and mysprite.rect.collidepoint(pygame.mouse.get_pos()) and not handled:
    print ("You have opened a chest!")
    handled = pygame.mouse.get_pressed()[0]

当然你可以继承Sprite并添加一个名为is_clicked的方法，如下所示：

class MySprite(Sprite):
  ...

  def is_clicked(self):
    return pygame.mouse.get_pressed()[0] and self.rect.collidepoint(pygame.mouse.get_pos())

所以，最好使用第一种方法恕我直言。

Answer 2

The pygame documentation for mouse events is here。您可以与pygame.mouse.get_pressed（如果需要）合作使用pygame.mouse.get_pos方法。但请通过主事件循环使用鼠标单击事件。事件循环更好的原因是“短暂点击”。您可能在普通计算机上没有注意到这些，但在触控板上使用点按式按键的计算机的点击周期过短。使用鼠标事件可以防止这种情况。

修改要执行像素完美碰撞，请使用their docs for sprites上的pygame.sprite.collide_rect()。

Answer 3

我一直在寻找这个问题的相同答案，经过多次努力，这就是我想出的答案：

#Python 3.4.3 with Pygame
import pygame

pygame.init()
pygame.display.set_caption('Crash!')
window = pygame.display.set_mode((300, 300))
running = True

# Draw Once
Rectplace = pygame.draw.rect(window, (255, 0, 0),(100, 100, 100, 100))
pygame.display.update()
# Main Loop
while running:
    # Mouse position and button clicking.
    pos = pygame.mouse.get_pos()
    pressed1, pressed2, pressed3 = pygame.mouse.get_pressed()
    # Check if the rect collided with the mouse pos
    # and if the left mouse button was pressed.
    if Rectplace.collidepoint(pos) and pressed1:
        print("You have opened a chest!")
    # Quit pygame.
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

Answer 4

单击鼠标按钮，MOUSEBUTTONDOWN事件发生一次，释放鼠标按钮，MOUSEBUTTONUP事件发生一次。 pygame.event.Event()对象具有两个属性，这些属性提供有关鼠标事件的信息。 pos是一个元组，用于存储单击的位置。 button存储被单击的按钮。每个鼠标按钮都关联一个值。例如，鼠标左键，鼠标中键，鼠标右键，上滚轮和下滚轮的属性值分别为1、2、3、4、5。当按下多个键时，会发生多个鼠标按钮事件。进一步的说明可以在模块pygame.event的文档中找到。

使用pygame.sprite.Sprite对象的rect属性和collidepoint方法查看是否单击了 Sprite 。将事件列表传递给update的pygame.sprite.Group方法，以便您可以在 Sprite 类中处理事件：

class SpriteObject(pygame.sprite.Sprite):
    # [...]

    def update(self, event_list):

        for event in event_list:
            if event.type == pygame.MOUSEBUTTONDOWN:
                if self.rect.collidepoint(event.pos):
                    # [...]

my_sprite = SpriteObject()
group = pygame.sprite.Group(my_sprite)

# [...]

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

    group.update(event_list)

    # [...]

最小示例： repl.it/@Rabbid76/PyGame-MouseClick

import pygame

class SpriteObject(pygame.sprite.Sprite):
    def __init__(self, x, y, color):
        super().__init__() 
        self.original_image = pygame.Surface((50, 50), pygame.SRCALPHA)
        pygame.draw.circle(self.original_image, color, (25, 25), 25)
        self.click_image = pygame.Surface((50, 50), pygame.SRCALPHA)
        pygame.draw.circle(self.click_image, color, (25, 25), 25)
        pygame.draw.circle(self.click_image, (255, 255, 255), (25, 25), 25, 4)
        self.image = self.original_image 
        self.rect = self.image.get_rect(center = (x, y))
        self.clicked = False

    def update(self, event_list):
        for event in event_list:
            if event.type == pygame.MOUSEBUTTONDOWN:
                if self.rect.collidepoint(event.pos):
                    self.clicked = not self.clicked

        self.image = self.click_image if self.clicked else self.original_image

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

sprite_object = SpriteObject(*window.get_rect().center, (128, 128, 0))
group = pygame.sprite.Group([
    SpriteObject(window.get_width() // 3, window.get_height() // 3, (128, 0, 0)),
    SpriteObject(window.get_width() * 2 // 3, window.get_height() // 3, (0, 128, 0)),
    SpriteObject(window.get_width() // 3, window.get_height() * 2 // 3, (0, 0, 128)),
    SpriteObject(window.get_width() * 2// 3, window.get_height() * 2 // 3, (128, 128, 0)),
])

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(event_list)

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

pygame.quit()
exit()

进一步查看Creating multiple sprites with different update()'s from the same sprite class in Pygame

可以通过pygame.mouse.get_pos()确定鼠标的当前位置。返回值是一个元组，表示鼠标光标的x和y坐标。 pygame.mouse.get_pressed()返回代表所有鼠标按钮状态（True或False的布尔值列表。只要按住按钮，按钮的状态就为True。当按下多个按钮时，列表中的多个项目为True。列表中的第1，第2和第3元素分别表示鼠标左键，鼠标中键和鼠标右键。

检测在pygame.sprite.Sprite对象的Update方法中评估鼠标状态：

class SpriteObject(pygame.sprite.Sprite):
    # [...]

    def update(self, event_list):

        mouse_pos = pygame.mouse.get_pos()
        mouse_buttons = pygame.mouse.get_pressed()

        if  self.rect.collidepoint(mouse_pos) and any(mouse_buttons):
            # [...]

my_sprite = SpriteObject()
group = pygame.sprite.Group(my_sprite)

# [...]

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

    group.update(event_list)

    # [...]

最小示例： repl.it/@Rabbid76/PyGame-MouseHover

import pygame

class SpriteObject(pygame.sprite.Sprite):
    def __init__(self, x, y, color):
        super().__init__() 
        self.original_image = pygame.Surface((50, 50), pygame.SRCALPHA)
        pygame.draw.circle(self.original_image, color, (25, 25), 25)
        self.hover_image = pygame.Surface((50, 50), pygame.SRCALPHA)
        pygame.draw.circle(self.hover_image, color, (25, 25), 25)
        pygame.draw.circle(self.hover_image, (255, 255, 255), (25, 25), 25, 4)
        self.image = self.original_image 
        self.rect = self.image.get_rect(center = (x, y))
        self.hover = False

    def update(self):
        mouse_pos = pygame.mouse.get_pos()
        mouse_buttons = pygame.mouse.get_pressed()

        #self.hover = self.rect.collidepoint(mouse_pos)
        self.hover = self.rect.collidepoint(mouse_pos) and any(mouse_buttons)

        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()

sprite_object = SpriteObject(*window.get_rect().center, (128, 128, 0))
group = pygame.sprite.Group([
    SpriteObject(window.get_width() // 3, window.get_height() // 3, (128, 0, 0)),
    SpriteObject(window.get_width() * 2 // 3, window.get_height() // 3, (0, 128, 0)),
    SpriteObject(window.get_width() // 3, window.get_height() * 2 // 3, (0, 0, 128)),
    SpriteObject(window.get_width() * 2// 3, window.get_height() * 2 // 3, (128, 128, 0)),
])

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

    group.update()

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

pygame.quit()
exit()

Pygame鼠标点击检测

4 个答案: