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python - 检测按住的两个鼠标按钮

问题描述

我是python的新手，我发现了一个代码，可以在按住并释放鼠标按钮时检测鼠标按钮，但是我希望“x”在两个按钮都被按住时变为真，我该怎么做

     # This function will be called when any key of mouse is pressed
def on_click(*args):
  # see what argument is passed.
  print(args)
  if args[-1]:
    # Do something when the mouse key is pressed.
    print('The "{}" mouse key has held down'.format(args[-2].name))

elif not args[-1]:
    # Do something when the mouse key is released.
    print('The "{}" mouse key is released'.format(args[-2].name))

# Open Listener for mouse key presses
with Listener(on_click=on_click) as listener:
 # Listen to the mouse key presses
 listener.join()

标签： pythonpynput

解决方案

要检测两个按钮是否同时按下，需要三个变量（在程序开始时初始化这些，在 on_click 函数之外）：

global leftPressed, rightPressed, bothPressed
leftPressed = False
rightPressed = False
bothPressed = False

*注意这里的变量是全局的，因为多个版本的 on_click 将访问和修改变量

然后，在第一个 if 语句中（按下鼠标按钮时）：

if args[-2].name == "left":
    leftPressed = True
elif args[-2].name == "right":
    rightPressed = True
            
if leftPressed and rightPressed:
    # if both left and right are pressed
    bothPressed = True

在第二个 if 语句中（释放鼠标按钮时）

if args[-2].name == "left":
    leftPressed = False
elif args[-2].name == "right":
    rightPressed = False

# as one key has been released, both are no longer pressed
bothPressed = False
print(bothPressed)

最后，要从函数 on_click 中访问全局变量，请将此行放在函数的开头：

global leftPressed, rightPressed, bothPressed

在此处查看完整版本的代码：

https://pastebin.com/nv9ddqMM

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