using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace TibisMathematicsSuite.KeyboardIO
{
    class HotkeyWindow : NativeWindow, IDisposable
    {
        #region Constants
        private const int WM_HOTKEY = 0x312;
        #endregion

        #region Events
        public event EventHandler<MyKeyEventArgs> HotkeyPressed;
        #endregion

        #region Constructor
        public HotkeyWindow()
        {
            this.CreateHandle(new System.Windows.Forms.CreateParams());
        }
        #endregion

        #region Processor
        protected override void WndProc(ref System.Windows.Forms.Message m)
        {
            base.WndProc(ref m);

            if (m.Msg == WM_HOTKEY && HotkeyPressed != null)
            {
                int vk = ((int)m.LParam >> 16) & 0xffff;
                int mods = (int)m.LParam & 0xffff;

                HotkeyPressed(this, new MyKeyEventArgs((Keys) vk, (MyKey.Modifiers) mods));
            }
        }
        #endregion

        #region Dispose
        public void Dispose()
        {
            this.DestroyHandle();
        }
        #endregion
    }
}