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Роман Копачев
Asked:2024-07-26 04:52:18 +0000 UTC2024-07-26 04:52:18 +0000 UTC

我无法立即读取 python 键盘上的按键和释放

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我最近决定从头开始制作自己的游戏。我决定做的第一件事是创建一个按键绑定系统。我轻松制作了两种类型 - [单击，切换]。然而，随着最受欢迎的类型“hold”的创建，问题出现了。我无法同时跟踪按下和释放（新线程根本不会创建。我通过 threading.active_count() 查看了这一点）。我怎样才能解决这个问题。我有一个逐笔检查的想法（键盘在循环中跟踪，等待 0.1 秒。您可以在一次滴答中检查按下，在下一次滴答中检查释放，依此类推）整个代码相当大，所以我只给出循环。

f_Kb 是一个类，我在其中编写了 check_button_press 和 check_button_release 方法，分别检查给定的键是否被按下或释放。

i = 0
while i < 100/0.1: #цикл идет 100 секунд
    z = 0
    while z < len(f_Kb.type): обнуление всех кулдаунов (для предотвращения ложных, повторных считываний)
        f_Kb.cooldowns[z] = False
        z += 1
    
    z = 0
    while z < len(f_Kb.online_keys): #запуск функций у активных биндов
        f_Kb.behaviours[f_Kb.get_index_by_object(f_Kb.online_keys[z],f_Kb.keys)]()
        z += 1

   
    #...............проблемное место.................
    keyboard.on_release(f_Kb.check_button_press)
    keyboard.on_press(f_Kb.check_button_release)
    i += 1

我怎样才能实现我的想法？

python

1 个回答

  1. Best Answer

    有趣的问题，我决定为你做一个小例子：

    import keyboard
import threading
import queue
import time

class KeyTracker:
    def __init__(self, callback):
        self.pressed_keys = set()
        self.callback = callback
        self.queue = queue.Queue()

        keyboard.hook(self.key_event)

        self.callback_thread = threading.Thread(target=self.queue_callback)
        self.callback_thread.start()

    def key_event(self, event):
        if event.event_type == keyboard.KEY_DOWN:
            if event.name not in self.pressed_keys:
                self.pressed_keys.add(event.name)
                self.queue.put(self.pressed_keys)
                print(f"Нажата клавиша: {event.name}")  
                    
        elif event.event_type == keyboard.KEY_UP:
            if event.name in self.pressed_keys:
                self.pressed_keys.remove(event.name)
                self.queue.put(self.pressed_keys)
                print(f"Отпущена клавиша: {event.name}")  

    def queue_callback(self):
        while True:
            pressed_keys = self.queue.get()
            if pressed_keys is None:
                break  
            self.callback(pressed_keys)

    def stop(self):
        self.queue.put(None)  
        self.callback_thread.join()

    def start(self):
        try:
            keyboard.wait('esc')
        except KeyboardInterrupt:
            pass
        finally:
            self.stop()

threads = {}

def pressed_keys(keys):
    print(f"Активные клавиши: {keys}")
    if 'z' in keys and 'z' not in threads:
        threads['z'] = threading.Thread(target=z_pressed, args=(keys,))
        threads['z'].start()
        
    if 'x' in keys and 'x' not in threads:
        threads['x'] = threading.Thread(target=x_pressed, args=(keys,))
        threads['x'].start()
        
    keys_v_b = {'v', 'b'}
    if keys_v_b.issubset(keys) and 'v+b' not in threads:
        threads['v+b'] = threading.Thread(target=v_b_pressed, args=(keys,))
        threads['v+b'].start()

def z_pressed(keys):
    while 'z' in keys:
        print("Зажата Z")
        time.sleep(0.2) 
    del threads['z']
        
def x_pressed(keys):
    while 'x' in keys:
        print("Зажата x")
        time.sleep(0.2) 
    del threads['x']
        
def v_b_pressed(keys):
    while all(key in keys for key in ('v', 'b')):
        print("Зажата v+b")
        time.sleep(0.2) 
    del threads['v+b']

if __name__ == "__main__":
    tracker = KeyTracker(pressed_keys)
    tracker.start()

    在此输入图像描述 在此输入图像描述

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