using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CSS_Solution.Forms
{
    partial class MainForm
    {
        private Point mPoint;
        private void Title_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
                Location = new Point(Location.X + e.X - mPoint.X, Location.Y + e.Y - mPoint.Y);
        }
        private void Title_MouseDown(object sender, MouseEventArgs e)
        {
            mPoint = new Point(e.X, e.Y);
        }
        //enum Adjustment_position
        //{
        //    LeftTop = 0,
        //    Top = 1,
        //    RightTop = 2,
        //    Right = 3,
        //    RightBottom = 4,
        //    Bottom = 5,
        //    LeftBottom = 6,
        //    Left = 7,
        //    Middle = 8
        //}
        //Adjustment_position adjustment_Position = Adjustment_position.Middle;
        //private void Main_MouseMove(object sender, MouseEventArgs e)
        //{

        //    if (e.Button == MouseButtons.Left)
        //    {
        //        switch (adjustment_Position)
        //        {
        //            case Adjustment_position.LeftTop:
        //                {
        //                    int endx = Left + Width;
        //                    Left = MousePosition.X;
        //                    Width = endx - Left;
        //                    int endy = Top + Height;
        //                    Top = MousePosition.Y;
        //                    Height = endy - Top;
        //                    break;
        //                }
        //            case Adjustment_position.Top:
        //                {
        //                    int endy = Top + Height;
        //                    Top = MousePosition.Y;
        //                    Height = endy - Top;
        //                    break;
        //                }
        //            case Adjustment_position.RightTop:
        //                {
        //                    int endy = Top + Height;
        //                    Top = MousePosition.Y;
        //                    Width = MousePosition.X - Left;
        //                    Height = endy - Top;
        //                    break;
        //                }
        //            case Adjustment_position.Right:
        //                {
        //                    Width = MousePosition.X - Left;
        //                    break;
        //                }
        //            case Adjustment_position.RightBottom:
        //                {
        //                    Width = MousePosition.X - Left;
        //                    Height = MousePosition.Y - Top;
        //                    break;
        //                }
        //            case Adjustment_position.Bottom:
        //                {
        //                    Height = MousePosition.Y - Top;
        //                    break;
        //                }
        //            case Adjustment_position.LeftBottom:
        //                {
        //                    int endx = Left + Width;
        //                    Left = MousePosition.X;
        //                    Width = endx - Left;
        //                    Height = MousePosition.Y - Top;
        //                    break;
        //                }
        //            case Adjustment_position.Left:
        //                {
        //                    int endx = Left + Width;
        //                    Left = MousePosition.X;
        //                    Width = endx - Left;
        //                    break;
        //                }
        //        }
        //    }
        //    if (e.Location.X >= Width - 4 && e.Location.Y >= Height - 4)
        //    {
        //        Cursor = Cursors.SizeNWSE; //RightBottom
        //        adjustment_Position = Adjustment_position.RightBottom;
        //    }
        //    else if (e.Location.X >= Width - 4 && e.Location.Y <=  4)
        //    {
        //        Cursor = Cursors.SizeNESW; //RightTop
        //        adjustment_Position = Adjustment_position.RightTop;
        //    }
        //    else if (e.Location.X <=  4 && e.Location.Y >= Height - 4)
        //    {
        //        Cursor = Cursors.SizeNESW; //LeftBottom
        //        adjustment_Position = Adjustment_position.LeftBottom;
        //    }
        //    else if (e.Location.X <=  4 && e.Location.Y <=  4)
        //    {
        //        Cursor = Cursors.SizeNWSE; //LeftTop
        //        adjustment_Position = Adjustment_position.LeftTop;
        //    }
        //    else if (e.Location.X >= Width - 4)
        //    {
        //        Cursor = Cursors.SizeWE; //Right
        //        adjustment_Position = Adjustment_position.Right;
        //    }
        //    else if (e.Location.X <=  4)
        //    {
        //        Cursor = Cursors.SizeWE; //Left
        //        adjustment_Position = Adjustment_position.Left;
        //    }
        //    else if (e.Location.Y >= Height - 4)
        //    {
        //        Cursor = Cursors.SizeNS; //Bottom
        //        adjustment_Position = Adjustment_position.Bottom;
        //    }
        //    else if (e.Location.Y <=  4)
        //    {
        //        Cursor = Cursors.SizeNS; //Top
        //        adjustment_Position = Adjustment_position.Top;
        //    }
        //    else
        //    {
        //        Cursor = Cursors.Arrow; //Middle
        //        adjustment_Position = Adjustment_position.Middle;
        //    }
        //}

        //private void Main_Leave(object sender, EventArgs e)
        //{
        //    Cursor = Cursors.Arrow;// 移出窗体变为正常
        //}
        #region 支持改变窗体大小
        private const int Guying_HTLEFT = 10;
        private const int Guying_HTRIGHT = 11;
        private const int Guying_HTTOP = 12;
        private const int Guying_HTTOPLEFT = 13;
        private const int Guying_HTTOPRIGHT = 14;
        private const int Guying_HTBOTTOM = 15;
        private const int Guying_HTBOTTOMLEFT = 0x10;
        private const int Guying_HTBOTTOMRIGHT = 17;
        protected override void WndProc(ref Message m)
        {
            switch (m.Msg)
            {
                case 0x0084:
                    base.WndProc(ref m);
                    Point vPoint = new Point((int)m.LParam & 0xFFFF, (int)m.LParam >> 16 & 0xFFFF);
                    vPoint = PointToClient(vPoint);
                    if (vPoint.X <= 5)
                        if (vPoint.Y <= 5)
                            m.Result = (IntPtr)Guying_HTTOPLEFT;
                        else if (vPoint.Y >= ClientSize.Height - 5)
                            m.Result = (IntPtr)Guying_HTBOTTOMLEFT;
                        else
                            m.Result = (IntPtr)Guying_HTLEFT;
                    else if (vPoint.X >= ClientSize.Width - 5)
                        if (vPoint.Y <= 5)
                            m.Result = (IntPtr)Guying_HTTOPRIGHT;
                        else if (vPoint.Y >= ClientSize.Height - 5)
                            m.Result = (IntPtr)Guying_HTBOTTOMRIGHT;
                        else
                            m.Result = (IntPtr)Guying_HTRIGHT;
                    else if (vPoint.Y <= 5)
                        m.Result = (IntPtr)Guying_HTTOP;
                    else if (vPoint.Y >= ClientSize.Height - 5)
                        m.Result = (IntPtr)Guying_HTBOTTOM;
                    break;
                case 0x0201://鼠标左键按下的消息
                    m.Msg = 0x00A1;//更改消息为非客户区按下鼠标
                    m.LParam = IntPtr.Zero; //默认值
                    m.WParam = new IntPtr(2);//鼠标放在标题栏内
                    base.WndProc(ref m);
                    break;
                default:
                    base.WndProc(ref m);
                    break;
            }
        }
        #endregion
    }
}