js獲取桌面鼠標(biāo)鍵盤事件怎么實(shí)現(xiàn)
js獲取桌面鼠標(biāo)鍵盤事件怎么實(shí)現(xiàn)
學(xué)習(xí)前端的同學(xué)你們知道怎么你們知道獲取桌面鼠標(biāo)鍵盤事件怎么實(shí)現(xiàn)嗎?不知道的話跟著學(xué)習(xí)啦小編一起來學(xué)習(xí)了解獲取桌面鼠標(biāo)鍵盤事件吧。
獲取桌面鼠標(biāo)鍵盤事件的代碼
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Reflection;
namespace UDPService
{
/// <summary>
///
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public class POINT
{
public int x;
public int y;
}
/// <summary>
///
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public class MouseHookStruct
{
public POINT pt;
public int hwnd;
public int wHitTestCode;
public int dwExtraInfo;
}
/// <summary>
///
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public class KeyboardHookStruct
{
public int vkCode;
public int scanCode;
public int flags;
public int time;
public int dwExtraInfo;
}
/// <summary>
///
/// </summary>
public class GlobalHook
{
public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam);
public GlobalHook()
{
Start();
}
~GlobalHook()
{
Stop();
}
public event MouseEventHandler OnMouseActivity;
public event KeyEventHandler KeyDown;
public event KeyPressEventHandler KeyPress;
public event KeyEventHandler KeyUp;
public delegate int GlobalHookProc(int nCode, Int32 wParam, IntPtr lParam);
static int hMouseHook = 0;
static int hKeyboardHook = 0;
public const int WH_MOUSE_LL = 14;
public const int WH_KEYBOARD_LL = 13;
GlobalHookProc MouseHookProcedure;
GlobalHookProc KeyboardHookProcedure;
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
public static extern int SetWindowsHookEx(int idHook, GlobalHookProc lpfn,
IntPtr hInstance, int threadId);
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
public static extern bool UnhookWindowsHookEx(int idHook);
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
public static extern int CallNextHookEx(int idHook, int nCode,
Int32 wParam, IntPtr lParam);
public void Start()
{
if (hMouseHook == 0)
{
MouseHookProcedure = new GlobalHookProc(MouseHookProc);
try
{
hMouseHook = SetWindowsHookEx(WH_MOUSE_LL,
MouseHookProcedure,
Marshal.GetHINSTANCE(
Assembly.GetExecutingAssembly().GetModules()[0]),
0);
}
catch (Exception err)
{ }
if (hMouseHook == 0)
{
Stop();
throw new Exception("SetWindowsHookEx failed.");
}
}
if (hKeyboardHook == 0)
{
KeyboardHookProcedure = new GlobalHookProc(KeyboardHookProc);
try
{
hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL,
KeyboardHookProcedure,
Marshal.GetHINSTANCE(
Assembly.GetExecutingAssembly().GetModules()[0]),
0);
}
catch (Exception err2)
{ }
if (hKeyboardHook == 0)
{
Stop();
throw new Exception("SetWindowsHookEx ist failed.");
}
}
}
public void Stop()
{
bool retMouse = true;
bool retKeyboard = true;
if (hMouseHook != 0)
{
retMouse = UnhookWindowsHookEx(hMouseHook);
hMouseHook = 0;
}
if (hKeyboardHook != 0)
{
retKeyboard = UnhookWindowsHookEx(hKeyboardHook);
hKeyboardHook = 0;
}
if (!(retMouse && retKeyboard))
throw new Exception("UnhookWindowsHookEx failed.");
}
private const int WM_MOUSEMOVE = 0x200;
private const int WM_LBUTTONDOWN = 0x201;
private const int WM_RBUTTONDOWN = 0x204;
private const int WM_MBUTTONDOWN = 0x207;
private const int WM_LBUTTONUP = 0x202;
private const int WM_RBUTTONUP = 0x205;
private const int WM_MBUTTONUP = 0x208;
private const int WM_LBUTTONDBLCLK = 0x203;
private const int WM_RBUTTONDBLCLK = 0x206;
private const int WM_MBUTTONDBLCLK = 0x209;
private int MouseHookProc(int nCode, Int32 wParam, IntPtr lParam)
{
if ((nCode >= 0) && (OnMouseActivity != null))
{
MouseButtons button = MouseButtons.None;
switch (wParam)
{
case WM_LBUTTONDOWN:
//case WM_LBUTTONUP:
//case WM_LBUTTONDBLCLK:
button = MouseButtons.Left;
break;
case WM_RBUTTONDOWN:
//case WM_RBUTTONUP:
//case WM_RBUTTONDBLCLK:
button = MouseButtons.Right;
break;
}
int clickCount = 0;
if (button != MouseButtons.None)
if (wParam == WM_LBUTTONDBLCLK || wParam == WM_RBUTTONDBLCLK)
clickCount = 2;
else
clickCount = 1;
MouseHookStruct MyMouseHookStruct =
(MouseHookStruct)Marshal.PtrToStructure(lParam, typeof(MouseHookStruct));
MouseEventArgs e = new MouseEventArgs(
button,
clickCount,
MyMouseHookStruct.pt.x,
MyMouseHookStruct.pt.y,
0);
OnMouseActivity(this, e);
}
return CallNextHookEx(hMouseHook, nCode, wParam, lParam);
}
[DllImport("user32")]
public static extern int ToAscii(int uVirtKey,
int uScanCode,
byte[] lpbKeyState,
byte[] lpwTransKey,
int fuState);
[DllImport("user32")]
public static extern int GetKeyboardState(byte[] pbKeyState);
private const int WM_KEYDOWN = 0x100;
private const int WM_KEYUP = 0x101;
private const int WM_SYSKEYDOWN = 0x104;
private const int WM_SYSKEYUP = 0x105;
private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam)
{
if ((nCode >= 0) && (KeyDown != null || KeyUp != null || KeyPress != null))
{
KeyboardHookStruct MyKeyboardHookStruct =
(KeyboardHookStruct)Marshal.PtrToStructure(lParam,
typeof(KeyboardHookStruct));
if (KeyDown != null && (wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN))
{
Keys keyData = (Keys)MyKeyboardHookStruct.vkCode;
KeyEventArgs e = new KeyEventArgs(keyData);
KeyDown(this, e);
}
if (KeyPress != null && wParam == WM_KEYDOWN)
{
byte[] keyState = new byte[256];
GetKeyboardState(keyState);
byte[] inBuffer = new byte[2];
if (ToAscii(MyKeyboardHookStruct.vkCode,
MyKeyboardHookStruct.scanCode,
keyState,
inBuffer,
MyKeyboardHookStruct.flags) == 1)
{
KeyPressEventArgs e = new KeyPressEventArgs((char)inBuffer[0]);
KeyPress(this, e);
}
}
if (KeyUp != null && (wParam == WM_KEYUP || wParam == WM_SYSKEYUP))
{
Keys keyData = (Keys)MyKeyboardHookStruct.vkCode;
KeyEventArgs e = new KeyEventArgs(keyData);
KeyUp(this, e);
}
}
return CallNextHookEx(hKeyboardHook, nCode, wParam, lParam);
}
}
}
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