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

namespace DevComponents.DotNetBar.Layout.Design
{
    internal static class WinApi
    {
        [DllImport("gdi32.dll", CharSet = CharSet.Auto)]
        public static extern IntPtr SelectObject(IntPtr hDC, IntPtr hObject);
        [DllImport("gdi32")]
        public static extern bool DeleteObject(IntPtr hObject);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto)]
        public static extern bool GetTextMetrics(HandleRef hdc, TEXTMETRIC tm);
        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
        public class TEXTMETRIC
        {
            public int tmHeight;
            public int tmAscent;
            public int tmDescent;
            public int tmInternalLeading;
            public int tmExternalLeading;
            public int tmAveCharWidth;
            public int tmMaxCharWidth;
            public int tmWeight;
            public int tmOverhang;
            public int tmDigitizedAspectX;
            public int tmDigitizedAspectY;
            public char tmFirstChar;
            public char tmLastChar;
            public char tmDefaultChar;
            public char tmBreakChar;
            public byte tmItalic;
            public byte tmUnderlined;
            public byte tmStruckOut;
            public byte tmPitchAndFamily;
            public byte tmCharSet;
        }

        [DllImport("user32")]
        public static extern int SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam);
        [DllImport("user32")]
        public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);
        public const int WM_SETREDRAW = 0x000B;

        public const int WM_LBUTTONDOWN = 0x0201;
        public const int WM_LBUTTONUP = 0x0202;
        public const int WM_RBUTTONDOWN = 0x0204;
        public const int WM_RBUTTONUP = 0x0205;
        public const int WM_MOUSEMOVE = 0x0200;
        public const int WM_MOUSELEAVE = 0x02A3;
        public const int WM_HSCROLL = 0x0114;
        public const int WM_VSCROLL = 0x0115;
        public const int WM_LBUTTONDBLCLK = 0x0203;

        public static int LOWORD(int n)
        {
            return (short)(n & 0xffff);
        }
        public static int HIWORD(int n)
        {
            return (int)((n >> 0x10) & 0xffff);
        }
        public static int LOWORD(IntPtr n)
        {
            return LOWORD((int)((long)n));
        }
        public static int HIWORD(IntPtr n)
        {
            return unchecked((short)((uint)n >> 16));
        }

        //[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true, ExactSpelling = true)]
        //public static extern int ScrollWindowEx(HandleRef hWnd, int nXAmount, int nYAmount, ref RECT rectScrollRegion, ref RECT rectClip, IntPtr hrgnUpdate, ref RECT prcUpdate, int flags);
        //[StructLayout(LayoutKind.Sequential)]
        //public struct RECT
        //{
        //    public int left;
        //    public int top;
        //    public int right;
        //    public int bottom;
        //    public RECT(int left, int top, int right, int bottom)
        //    {
        //        this.left = left;
        //        this.top = top;
        //        this.right = right;
        //        this.bottom = bottom;
        //    }

        //    public RECT(Rectangle r)
        //    {
        //        this.left = r.Left;
        //        this.top = r.Top;
        //        this.right = r.Right;
        //        this.bottom = r.Bottom;
        //    }

        //    public static RECT FromXYWH(int x, int y, int width, int height)
        //    {
        //        return new RECT(x, y, x + width, y + height);
        //    }

        //    public Size Size
        //    {
        //        get
        //        {
        //            return new Size(this.right - this.left, this.bottom - this.top);
        //        }
        //    }
        //}
    }
}