using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace RichCreator.Utility.Utilitys
{
    public class SystemHotKey
    {
        /// <summary>
        /// 如果函数执行成功，返回值不为0。
        /// 如果函数执行失败，返回值为0。要得到扩展错误信息，调用GetLastError。
        /// </summary>
        /// <param name="hWnd">要定义热键的窗口的句柄</param>
        /// <param name="id">定义热键ID（不能与其它ID重复）</param>
        /// <param name="fsModifiers">标识热键是否在按Alt、Ctrl、Shift、Windows等键时才会生效</param>
        /// <param name="vk">定义热键的内容</param>
        /// <returns></returns>
        [DllImport("user32.dll", SetLastError = true)]
        public static extern bool RegisterHotKey(IntPtr hWnd, int id, KeyModifiers fsModifiers, Keys vk);

        /// <summary>
        /// 注销热键
        /// </summary>
        /// <param name="hWnd">要取消热键的窗口的句柄</param>
        /// <param name="id">要取消热键的ID</param>
        /// <returns></returns>
        [DllImport("user32.dll", SetLastError = true)]
        public static extern bool UnregisterHotKey(IntPtr hWnd, int id);

        /// <summary>
        /// 辅助键名称。
        /// Alt, Ctrl, Shift, WindowsKey
        /// </summary>
        [Flags()]
        public enum KeyModifiers { None = 0, Alt = 1, Ctrl = 2, Shift = 4, WindowsKey = 8 }

        /// <summary>
        /// 注册热键
        /// </summary>
        /// <param name="hwnd">窗口句柄</param>
        /// <param name="hotKey_id">热键ID</param>
        /// <param name="keyModifiers">组合键</param>
        /// <param name="key">热键</param>
        public static bool RegHotKey(IntPtr hwnd, int hotKeyId, KeyModifiers keyModifiers, Keys key)
        {
            if (!RegisterHotKey(hwnd, hotKeyId, keyModifiers, key))
            {
                int errorCode = Marshal.GetLastWin32Error();
                //if (errorCode == 1409)
                //{
                //    MessageBox.Show("热键被占用 ！");
                //}
                //else
                //{
                //    MessageBox.Show("注册热键失败！错误代码：" + errorCode);
                //}
                return false;
            }
            return true;
        }

        /// <summary>
        /// 注销热键
        /// </summary>
        /// <param name="hwnd">窗口句柄</param>
        /// <param name="hotKey_id">热键ID</param>
        public static void UnRegHotKey(IntPtr hwnd, int hotKeyId)
        {
            //注销指定的热键
            UnregisterHotKey(hwnd, hotKeyId);
        }

    }
}