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python - 在 Pygame 中通过按钮单击调用函数

问题描述

在下面的代码中，我在 Pygame 中得到了一个带有按钮的屏幕。现在我想单击按钮，然后一个random()函数启动，5 秒后它从按钮的开头返回到屏幕，让我可以选择再次单击并再次调用随机函数。

def loop():
    clock = pygame.time.Clock()
    number = 0
    # The button is just a rect.
    button = pygame.Rect(300,300,205,80)
    done = False
    while not done:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                done = True
            # This block is executed once for each MOUSEBUTTONDOWN event.
            elif event.type == pygame.MOUSEBUTTONDOWN:
                # 1 is the left mouse button, 2 is middle, 3 is right.
                if event.button == 1:
                    # `event.pos` is the mouse position.
                    if button.collidepoint(event.pos):
                        # Incremt the number.
                        number += 1

random()
loop()
pygame.quit()

标签： pythonbuttonpygame

解决方案

添加一个状态变量 ( runRandom)，它指示函数random是否必须运行：

runRandom = False
while not done:

    # [...]

    if runRandom:
        random()

添加用户定义pygame.event的，可用于计时器：

runRandomEvent = pygame.USEREVENT + 1

for event in pygame.event.get():

   # [...]

   elif event.type == runRandomEvent:
      # [...]

random如果ins 没有运行，则允许按下按钮。如果按下按钮，则使用确定的时间段（例如 5000 毫秒 = 5 秒）runRandom启动计时器 ( )：pygame.time.set_timer()

# [...]

elif event.type == pygame.MOUSEBUTTONDOWN:
    if event.button == 1:
        if button.collidepoint(event.pos) and not runRandom:
            # [...]

            runRandom = True
            pygame.time.set_timer(runRandomEvent, 5000)

当时间过去时，停止运行random并runRandom = False停止计时器：

# [...]

elif event.type == runRandomEvent:
    runRandom = False
    pygame.time.set_timer(runRandomEvent, 0)

以某种方式将建议应用于您的代码：

# define user event for the timer
runRandomEvent = pygame.USEREVENT + 1

def loop():
    clock = pygame.time.Clock()
    number = 0
    # The button is just a rect.
    button = pygame.Rect(300,300,205,80)
    done = False
    runRandom = False
    while not done:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                done = True
            # This block is executed once for each MOUSEBUTTONDOWN event.
            elif event.type == pygame.MOUSEBUTTONDOWN:
                # 1 is the left mouse button, 2 is middle, 3 is right.
                if event.button == 1:
                    # `event.pos` is the mouse position and  "random" is not running
                    if button.collidepoint(event.pos) and not runRandom:
                        # Incremt the number.
                        number += 1

                        # Start timer and enable running "random"
                        runRandom = True
                        pygame.time.set_timer(runRandomEvent, 5000) # 5000 milliseconds

            elif event.type == runRandomEvent:
                runRandom = False
                pygame.time.set_timer(runRandomEvent, 0)

        # [...]

        # run "random"
        if runRandom:
            random()

        # [...]

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