Python監聽鍵盤和鼠標事件

我們可以利用windows提供的api函數來實現對系統鍵盤事件和鼠標事件的監聽，主要利用的是SetWindowsHookEx函數，這個函數可以允許調用者傳入一個鈎子函數也叫回調函數，當指定的事件發生時，你

傳入的函數就會被觸發，有些事件是進程級的，有些事件是系統級的，這里我們用WH_KEYBOARD_LL來監聽系統鍵盤事件，用WH_MOUSE_LL來監聽鼠標事件，注意不是WH_KEYBOARD，使用WH_KEYBOARD是無法監聽到外部

程序的事件的，這個可以在windows官方文檔里面看到說明，要用WH_KEYBOARD來監聽系統鍵盤必須寫dll去實現。

因為用到了一些宏定義在win32con里面已經有了，所以需要安裝一下pypiwin32，當然如果你將這些宏定義寫在自己的文件中，那么就不用安裝pypiwin32了。

輸入：pip install pypiwin32 安裝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
#保存鍵盤鈎子函數句柄
keyboard_hd = None
#保存鼠標鈎子函數句柄
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):
    """
    函數功能：鍵盤鈎子函數，當有按鍵按下時此函數被回調
    """
    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():
    """
    函數功能：啟動鍵盤監聽
    """
    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():
    """
    函數功能：停止鍵盤監聽
    """
    UnhookWindowsHookEx(keyboard_hd)


def mouse_pro(nCode, wParam, lParam):
    """
    函數功能：鼠標鈎子函數，當有鼠標事件，此函數被回調
    """
    if nCode == win32con.HC_ACTION:
        MSLLHOOKSTRUCT_p = POINTER(MSLLHOOKSTRUCT)
        param=cast(lParam,MSLLHOOKSTRUCT_p)
        #鼠標左鍵點擊
        if wParam == win32con.WM_LBUTTONDOWN:
            print("左鍵點擊，坐標：x:%d,y:%d" % (param.contents.pt.x,param.contents.pt.y))
        elif wParam == win32con.WM_LBUTTONUP:
            print("左鍵抬起，坐標：x:%d,y:%d" % (param.contents.pt.x, param.contents.pt.y))
        elif wParam == win32con.WM_MOUSEMOVE:
            print("鼠標移動，坐標：x:%d,y:%d" % (param.contents.pt.x, param.contents.pt.y))
        elif wParam == win32con.WM_RBUTTONDOWN:
            print("右鍵點擊，坐標：x:%d,y:%d" % (param.contents.pt.x, param.contents.pt.y))
        elif wParam == win32con.WM_RBUTTONUP:
            print("右鍵抬起，坐標：x:%d,y:%d" % (param.contents.pt.x, param.contents.pt.y))
    return CallNextHookEx(mouse_hd, nCode, wParam, lParam)


def start_mouse_hook():
    """
    函數功能：啟動鼠標監聽
    """
    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():
    """
    函數功能：停止鼠標監聽
    """
    UnhookWindowsHookEx(mouse_hd)

 

測試代碼：

import HookApi

if __name__== '__main__':
    HookApi.start_keyboard_hook()

 

打開一個txt文件，在里面輸入文字，