python - 在 Python 中使用 Win32api 获取鼠标滚轮滚动

Question

我想读取鼠标滚轮滚动事件，然后模拟它们。我知道我可以使用以下代码模拟它。

#Scroll one up
win32api.mouse_event(MOUSEEVENTF_WHEEL, x, y, 1, 0)

#Scroll one down
win32api.mouse_event(MOUSEEVENTF_WHEEL, x, y, -1, 0)

但是，我找不到在 Python 中使用 win32api 获取 whell 滚动事件的方法。有什么方法可以检测滚轮向上或向下滚动事件吗？

Answer 1

如果需要获取全局WM_MOUSEWHEEL消息，您可以使用 SetWindowsHookEx 功能和 WH_MOUSE_LL钩子(Hook)。

然后处理WM_MOUSEWHEEL钩子(Hook)函数中的消息。

这是一个示例:

import win32api 
import win32con
import ctypes
from ctypes import windll, CFUNCTYPE, POINTER, c_int, c_void_p, byref

user32 = ctypes.windll.user32
kernel32 = ctypes.windll.kernel32

def LowLevelMouseProc(nCode, wParam, lParam):
    if wParam == win32con.WM_MOUSEWHEEL:
        print("mousewheel triggerd!")
    return windll.user32.CallNextHookEx(hook_id, nCode, wParam, lParam)

if __name__ == '__main__':
    CMPFUNC = CFUNCTYPE(c_void_p, c_int, ctypes.wintypes.WPARAM, ctypes.wintypes.LPARAM)

    pointer = CMPFUNC(LowLevelMouseProc)
    hook_id = user32.SetWindowsHookExW(win32con.WH_MOUSE_LL,pointer,c_void_p(win32api.GetModuleHandle(None), 0)
    msg = ctypes.wintypes.MSG()
    while user32.GetMessageW(ctypes.byref(msg), 0, 0, 0) != 0:
        user32.TranslateMessage(msg)
        user32.DispatchMessageW(msg)

对我有用:

编辑

如果出现类似<class'OverflowError'>: int too long to convert的问题，你可以试试下面的代码:

import win32api 
import win32con
import ctypes
from ctypes import windll, CFUNCTYPE, c_int, c_void_p, wintypes

 

user32 = ctypes.windll.user32
kernel32 = ctypes.windll.kernel32
user32.CallNextHookEx.argtypes = [ctypes.wintypes.HHOOK,c_int, ctypes.wintypes.WPARAM, ctypes.wintypes.LPARAM]

 

def LowLevelMouseProc(nCode, wParam, lParam):
    if wParam == win32con.WM_MOUSEWHEEL:
        print("mousewheel triggerd!")
    return user32.CallNextHookEx(hook_id, nCode, wParam, lParam)

 

if __name__ == '__main__':
    CMPFUNC = CFUNCTYPE(c_void_p, c_int, ctypes.wintypes.WPARAM, ctypes.wintypes.LPARAM)
    user32.SetWindowsHookExW.argtypes = [c_int,CMPFUNC,ctypes.wintypes.HINSTANCE,ctypes.wintypes.DWORD]
    pointer = CMPFUNC(LowLevelMouseProc)
    hook_id = user32.SetWindowsHookExW(win32con.WH_MOUSE_LL,pointer,win32api.GetModuleHandle(None), 0)
    msg = ctypes.wintypes.MSG()
    while user32.GetMessageW(ctypes.byref(msg), 0, 0, 0) != 0:
        user32.TranslateMessage(msg)
        user32.DispatchMessageW(msg)