using System;

using System.Drawing;

using System.Runtime.InteropServices;

namespace Aga.Controls.Tree

{

    internal static class NativeMethods

    {

        public const int DCX_WINDOW = 0x01;

        public const int DCX_CACHE = 0x02;

        public const int DCX_NORESETATTRS = 0x04;

        public const int DCX_CLIPCHILDREN = 0x08;

        public const int DCX_CLIPSIBLINGS = 0x10;

        public const int DCX_PARENTCLIP = 0x20;

        public const int DCX_EXCLUDERGN = 0x40;

        public const int DCX_INTERSECTRGN = 0x80;

        public const int DCX_EXCLUDEUPDATE = 0x100;

        public const int DCX_INTERSECTUPDATE = 0x200;

        public const int DCX_LOCKWINDOWUPDATE = 0x400;

        public const int DCX_VALIDATE = 0x200000;

        public const int WM_THEMECHANGED = 0x031A;

        public const int WM_NCPAINT = 0x85;

        public const int WM_NCCALCSIZE = 0x83;

        public const int WS_BORDER = 0x800000;

        public const int WS_EX_CLIENTEDGE = 0x200;

        public const int WVR_HREDRAW = 0x100;

        public const int WVR_VREDRAW = 0x200;

        public const int WVR_REDRAW = (WVR_HREDRAW | WVR_VREDRAW);

        [StructLayout(LayoutKind.Sequential)]

        public struct NCCALCSIZE_PARAMS

        {

            public RECT rgrc0, rgrc1, rgrc2;

            public IntPtr lppos;

        }

        [StructLayout(LayoutKind.Sequential)]

        public struct RECT

        {

            public int Left;

            public int Top;

            public int Right;

            public int Bottom;

            public static RECT FromRectangle(Rectangle rectangle)

            {

                RECT result = new RECT();

                result.Left = rectangle.Left;

                result.Top = rectangle.Top;

                result.Right = rectangle.Right;

                result.Bottom = rectangle.Bottom;

                return result;

            }

            public Rectangle ToRectangle()

            {

                return new Rectangle(Left, Top, Right - Left, Bottom - Top);

            }

        }

        [DllImport("user32.dll", SetLastError = true)]

        public static extern IntPtr GetDCEx(IntPtr hWnd, IntPtr hrgnClip, int flags);

        [DllImport("user32.dll")]

        public static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);

        [DllImport("user32.dll")]

        public static extern bool GetWindowRect(IntPtr hWnd, out RECT lpRect);

    }

}