using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;

namespace Azylee.WinformSkin.APIUtils
{
    public class FormStyleAPI
    {

        [StructLayout(LayoutKind.Sequential)]
        public struct Size
        {
            public Int32 cx;
            public Int32 cy;

            public Size(Int32 x, Int32 y)
            {
                cx = x;
                cy = y;
            }
        }

        [StructLayout(LayoutKind.Sequential, Pack = 1)]
        public struct BLENDFUNCTION
        {
            public byte BlendOp;
            public byte BlendFlags;
            public byte SourceConstantAlpha;
            public byte AlphaFormat;
        }

        [StructLayout(LayoutKind.Sequential)]
        public struct Point
        {
            public Int32 x;
            public Int32 y;

            public Point(Int32 x, Int32 y)
            {
                this.x = x;
                this.y = y;
            }
        }

        public const byte AC_SRC_OVER = 0;
        public const Int32 ULW_ALPHA = 2;
        public const byte AC_SRC_ALPHA = 1;

        /// <summary>
        /// 从左到右显示
        /// </summary>
        public const Int32 AW_HOR_POSITIVE = 0x00000001;
        /// <summary>
        /// 从右到左显示
        /// </summary>
        public const Int32 AW_HOR_NEGATIVE = 0x00000002;
        /// <summary>
        /// 从上到下显示
        /// </summary>
        public const Int32 AW_VER_POSITIVE = 0x00000004;
        /// <summary>
        /// 从下到上显示
        /// </summary>
        public const Int32 AW_VER_NEGATIVE = 0x00000008;
        /// <summary>
        /// 若使用了AW_HIDE标志，则使窗口向内重叠，即收缩窗口；否则使窗口向外扩展，即展开窗口
        /// </summary>
        public const Int32 AW_CENTER = 0x00000010;
        /// <summary>
        /// 隐藏窗口，缺省则显示窗口
        /// </summary>
        public const Int32 AW_HIDE = 0x00010000;
        /// <summary>
        /// 激活窗口。在使用了AW_HIDE标志后不能使用这个标志
        /// </summary>
        public const Int32 AW_ACTIVATE = 0x00020000;
        /// <summary>
        /// 使用滑动类型。缺省则为滚动动画类型。当使用AW_CENTER标志时，这个标志就被忽略
        /// </summary>
        public const Int32 AW_SLIDE = 0x00040000;
        /// <summary>
        /// 透明度从高到低
        /// </summary>
        public const Int32 AW_BLEND = 0x00080000;
        #region MyRegion
        public const int WM_ERASEBKGND = 0x0014;
        public const int WM_LBUTTONDOWN = 0x0201;
        public const int WM_LBUTTONUP = 0x0202;
        public const int WM_LBUTTONDBLCLK = 0x0203;
        public const int WM_WINDOWPOSCHANGING = 0x46;
        public const int WM_PAINT = 0xF;
        public const int WM_CREATE = 0x0001;
        public const int WM_ACTIVATE = 0x0006;
        public const int WM_NCCREATE = 0x0081;
        public const int WM_NCCALCSIZE = 0x0083;
        public const int WM_NCPAINT = 0x0085;
        public const int WM_NCACTIVATE = 0x0086;
        public const int WM_NCLBUTTONDOWN = 0x00A1;
        public const int WM_NCLBUTTONUP = 0x00A2;
        public const int WM_NCLBUTTONDBLCLK = 0x00A3;
        public const int WM_NCMOUSEMOVE = 0x00A0;

        public const int WM_NCHITTEST = 0x0084;

        public const int HTLEFT = 10;
        public const int HTRIGHT = 11;
        public const int HTTOP = 12;
        public const int HTTOPLEFT = 13;
        public const int HTTOPRIGHT = 14;
        public const int HTBOTTOM = 15;
        public const int HTBOTTOMLEFT = 0x10;
        public const int HTBOTTOMRIGHT = 17;
        public const int HTCAPTION = 2;
        public const int HTCLIENT = 1;

        public const int WM_FALSE = 0;
        public const int WM_TRUE = 1;
        #endregion
        /// <summary>
        /// 执行动画
        /// </summary>
        /// <param name="whnd">控件句柄</param>
        /// <param name="dwtime">动画时间</param>
        /// <param name="dwflag">动画组合名称</param>
        /// <returns>bool值，动画是否成功</returns>
        [DllImport("user32")]
        public static extern bool AnimateWindow(IntPtr whnd, int dwtime, int dwflag);

        [DllImport("user32")]
        public static extern void mouse_event(int dwFlags, int dx, int dy, int dwData, int dwExtraInfo);

        [DllImport("gdi32.dll")]
        public static extern int CreateRoundRectRgn(int x1, int y1, int x2, int y2, int x3, int y3);

        [DllImport("user32.dll")]
        public static extern int SetWindowRgn(IntPtr hwnd, int hRgn, Boolean bRedraw);

        [DllImport("user32", EntryPoint = "GetWindowLong")]
        public static extern uint GetWindowLong(IntPtr hwnd, int nIndex);

        [DllImport("user32", EntryPoint = "SetWindowLong")]
        public static extern uint SetWindowLong(IntPtr hwnd, int nIndex, uint dwNewLong);

        [DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]
        public static extern IntPtr CreateCompatibleDC(IntPtr hDC);

        [DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]
        public static extern IntPtr GetDC(IntPtr hWnd);

        [DllImport("gdi32.dll", ExactSpelling = true)]
        public static extern IntPtr SelectObject(IntPtr hDC, IntPtr hObj);

        [DllImport("user32.dll", ExactSpelling = true)]
        public static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);

        [DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]
        public static extern int DeleteDC(IntPtr hDC);

        [DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]
        public static extern int DeleteObject(IntPtr hObj);

        [DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]
        public static extern int UpdateLayeredWindow(IntPtr hwnd, IntPtr hdcDst, ref Point pptDst, ref Size psize, IntPtr hdcSrc, ref Point pptSrc, Int32 crKey, ref BLENDFUNCTION pblend, Int32 dwFlags);

        [DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]
        public static extern IntPtr ExtCreateRegion(IntPtr lpXform, uint nCount, IntPtr rgnData);
        [DllImport("user32.dll")]
        public static extern bool ReleaseCapture();
        [DllImport("user32.dll")]
        public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);

    }
}