Python监听键盘和鼠标事件的示例代码

我们可以利用windows提供的api函数来实现对系统键盘事件和鼠标事件的监听,主要利用的是SetWindowsHookEx函数,这个函数可以允许调用者传入一个钩子函数也叫回调函数,当指定的事件发生时,你

传入的函数就会被触发,有些事件是进程级的,有些事件是系统级的,这里我们用WH_KEYBOARD_LL来监听系统键盘事件,用WH_MOUSE_LL来监听鼠标事件,注意不是WH_KEYBOARD,使用WH_KEYBOARD是无法监听到外部

程序的事件的,这个可以在windows官方文档里面看到说明,要用WH_KEYBOARD来监听系统键盘必须写dll去实现。

因为用到了一些宏定义在win32con里面已经有了,所以需要安装一下pypiwin32,当然如果你将这些宏定义写在自己的文件中,那么就不用安装pypiwin32了。

安装pypiwin32

pip install pypiwin32

# coding=utf-8

from ctypes import *

from ctypes import wintypes

import win32con

SetWindowsHookEx=windll.user32.SetWindowsHookExA

UnhookWindowsHookEx=windll.user32.UnhookWindowsHookEx

CallNextHookEx=windll.user32.CallNextHookEx

GetMessage=windll.user32.GetMessageA

GetModuleHandle=windll.kernel32.GetModuleHandleW

#保存键盘钩子函数句柄

keyboard_hd = None

#保存鼠标钩子函数句柄

mouse_hd = None

class KBDLLHOOKSTRUCT(Structure):

_fields_ = [

('vkCode',c_int),

('scanCode', c_int),

('flags', c_int),

('time', c_int),

('dwExtraInfo', c_uint),

('',c_void_p)

]

class POINT(Structure):

_fields_ = [

('x',c_long),

('y',c_long)

]

class MSLLHOOKSTRUCT(Structure):

_fields_ = [

('pt',POINT),

('hwnd',c_int),

('wHitTestCode',c_uint),

('dwExtraInfo',c_uint),

]

def wait_for_msg():

msg = wintypes.MSG()

GetMessage(msg, 0, 0, 0)

def keyboard_pro(nCode, wParam, lParam):

"""

函数功能:键盘钩子函数,当有按键按下时此函数被回调

"""

if nCode == win32con.HC_ACTION:

KBDLLHOOKSTRUCT_p = POINTER(KBDLLHOOKSTRUCT)

param=cast(lParam,KBDLLHOOKSTRUCT_p)

print(param.contents.vkCode)

return CallNextHookEx(keyboard_hd, nCode, wParam, lParam)

def start_keyboard_hook():

"""

函数功能:启动键盘监听

"""

HOOKPROTYPE = CFUNCTYPE(c_int, c_int, c_int, POINTER(c_void_p))

pointer = HOOKPROTYPE(keyboard_pro)

keyboard_hd = SetWindowsHookEx(

win32con.WH_KEYBOARD_LL,

pointer,

GetModuleHandle(None),

0)

wait_for_msg()

def stop_keyboard_hook():

"""

函数功能:停止键盘监听

"""

UnhookWindowsHookEx(keyboard_hd)

def mouse_pro(nCode, wParam, lParam):

"""

函数功能:鼠标钩子函数,当有鼠标事件,此函数被回调

"""

if nCode == win32con.HC_ACTION:

MSLLHOOKSTRUCT_p = POINTER(MSLLHOOKSTRUCT)

param=cast(lParam,MSLLHOOKSTRUCT_p)

#鼠标左键点击

if wParam == win32con.WM_LBUTTONDOWN:

print("左键点击,坐标:x:%d,y:%d" % (param.contents.pt.x,param.contents.pt.y))

elif wParam == win32con.WM_LBUTTONUP:

print("左键抬起,坐标:x:%d,y:%d" % (param.contents.pt.x, param.contents.pt.y))

elif wParam == win32con.WM_MOUSEMOVE:

print("鼠标移动,坐标:x:%d,y:%d" % (param.contents.pt.x, param.contents.pt.y))

elif wParam == win32con.WM_RBUTTONDOWN:

print("右键点击,坐标:x:%d,y:%d" % (param.contents.pt.x, param.contents.pt.y))

elif wParam == win32con.WM_RBUTTONUP:

print("右键抬起,坐标:x:%d,y:%d" % (param.contents.pt.x, param.contents.pt.y))

return CallNextHookEx(mouse_hd, nCode, wParam, lParam)

def start_mouse_hook():

"""

函数功能:启动鼠标监听

"""

HOOKPROTYPE = CFUNCTYPE(c_int, c_int, c_int, POINTER(c_void_p))

pointer = HOOKPROTYPE(mouse_pro)

mouse_hd = SetWindowsHookEx(

win32con.WH_MOUSE_LL,

pointer,

GetModuleHandle(None),

0)

wait_for_msg()

def stop_mouse_hook():

"""

函数功能:停止鼠标监听

"""

UnhookWindowsHookEx(mouse_hd)

测试代码:

import HookApi

if __name__== '__main__':

HookApi.start_keyboard_hook()

运行效果

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