using System;
using System.Runtime.InteropServices;

/**************************/
/**　　マウスのフック　　**/
/**************************/
namespace XXXXX
{
    public class ArtMouseHook
    {
        //構造定義
        public enum Stroke
        {
            MOVE,
            LEFT_DOWN,
            LEFT_UP,
            RIGHT_DOWN,
            RIGHT_UP,
            MIDDLE_DOWN,
            MIDDLE_UP,
            WHEEL_DOWN,
            WHEEL_UP,
            X1_DOWN,
            X1_UP,
            X2_DOWN,
            X2_UP,
            UNKNOWN
        }

        public struct StateMouse
        {
            public Stroke Stroke;
            public int X;
            public int Y;
            public uint Data;
            public uint Flags;
            public uint Time;
            public IntPtr ExtraInfo;
        }

        [StructLayout(LayoutKind.Sequential)]
        private struct POINT
        {
            public int x;
            public int y;
        }

        [StructLayout(LayoutKind.Sequential)]
        private struct MSLLHOOKSTRUCT
        {
            public POINT pt;
            public uint mouseData;
            public uint flags;
            public uint time;
            public System.IntPtr dwExtraInfo;
        }

        //関数定義
        [DllImport("user32.dll")]
        private static extern IntPtr SetWindowsHookEx(
            int idHook, 
            MouseHookCallback lpfn, 
            IntPtr hMod, 
            uint dwThreadId);

        [DllImport("user32.dll")]
        private static extern IntPtr CallNextHookEx(
            IntPtr hhk, 
            int nCode, 
            uint msg, 
            ref MSLLHOOKSTRUCT msllhookstruct);

        private delegate IntPtr MouseHookCallback(int nCode, uint msg, ref MSLLHOOKSTRUCT msllhookstruct);

        //マウスイベント
        private event MouseHookCallback m_EventMouse;
        private IntPtr m_Handle;

        private IntPtr EventMouse(int nCode, uint msg, ref MSLLHOOKSTRUCT s) //MouseHookCallback
        {
            int iX = s.pt.x;
            int iY = s.pt.y;
            m_MouseEventDelegate(iX, iY);
            return CallNextHookEx(m_Handle, nCode, msg, ref s);
        }

        //-------------------------------------
        //-------------------------------------
        //-------------------------------------

        //インスタンスの取得
        private static ArtMouseHook m_Instance = null;

        public static ArtMouseHook GetInstance()
        {
            if (m_Instance == null)
            {
                m_Instance = new ArtMouseHook();
            }

            return m_Instance;
        }

        //マウスイベントの開始
        public delegate void MouseEventDelegate(int iX, int iY);
        private MouseEventDelegate m_MouseEventDelegate = null;

        public void StartMouseEvent(MouseEventDelegate oMouseEventDelegate)
        {           
            IntPtr hInstance = Marshal.GetHINSTANCE(System.Reflection.Assembly.GetExecutingAssembly().GetModules()[0]);

            // WH_MOUSE_LL = 14
            m_MouseEventDelegate = oMouseEventDelegate;
            m_EventMouse = EventMouse;
            m_Handle = SetWindowsHookEx(14, m_EventMouse, hInstance, 0);

            if (m_Handle == IntPtr.Zero)
            {
                //Console.WriteLine("ERROR ArtMouseHook");
            }
        }
    }
}