using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.ComponentModel;
using System.Runtime.InteropServices;

namespace LYFZ.ComponentLibrary
{
    public class TextBoxBasicEx : System.Windows.Forms.TextBox
    {


        public enum QQControlState
        {
            /// <summary>
            /// 正常状态
            /// </summary>
            Normal = 0,
            /// <summary>
            ///  /鼠标进入
            /// </summary>
            Highlight = 1,
            /// <summary>
            /// 鼠标按下
            /// </summary>
            Down = 2,
            /// <summary>
            /// 获得焦点
            /// </summary>
            Focus = 3,
            /// <summary>
            /// 控件禁止
            /// </summary>
            Disabled = 4
        }
        //private bool _isCloseQaJiaoChar = true;
        ///// <summary>
        ///// 是否限制全角输入
        ///// </summary>
        //[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden), Browsable(false)]
        //[Category("控件扩展属性"), Description("是否限制全角输入")]
        //public bool IsCloseQaJiaoChar
        //{
        //    get { return _isCloseQaJiaoChar; }
        //    set { _isCloseQaJiaoChar = value; }
        //}
        ///// <summary>
        ///// 重写输入限制
        ///// </summary>
        ///// <param name="e"></param>
        //protected override void OnKeyPress(KeyPressEventArgs e)
        //{
        //    if (this.IsCloseQaJiaoChar && LYFZ.BLL.OtherCommonModel.IsQaJiaoChar(e.KeyChar))
        //    { e.Handled = true; }
        //    else
        //    { base.OnKeyPress(e); }
        //}
        ///// <summary>
        ///// 重写离开事件
        ///// </summary>
        ///// <param name="e"></param>
        //protected override void OnLeave(EventArgs e)
        //{
        //    if (this.IsCloseQaJiaoChar)
        //    {
        //        if (LYFZ.BLL.OtherCommonModel.StringContainsQaJiao(this.Text.Trim()))
        //        { this.Text = ""; }
        //    }
        //    base.OnLeave(e);
        //}

        internal class ColorTable
        {
            public static Color QQBorderColor = Color.FromArgb(174, 168, 168); // //LightBlue = Color.FromArgb(173, 216, 230)
            public static Color QQHighLightColor = Color.FromArgb(174, 168, 168); //GetColor(QQBorderColor, 255, -63, -11, 23);   //Color.FromArgb(110, 205, 253)
            public static Color QQHighLightInnerColor = Color.FromArgb(174, 168, 168); //GetColor(QQBorderColor, 255, -100, -44, 1);   //Color.FromArgb(73, 172, 231);
        }
        /// <summary>
        /// 返回给定的颜色的ARGB的分量差值的颜色
        /// </summary>
        /// <param name="colorBase"></param>
        /// <param name="a">A</param>
        /// <param name="r">R</param>
        /// <param name="g">G</param>
        /// <param name="b">B</param>
        /// <returns></returns>
        public static Color GetColor(Color colorBase, int a, int r, int g, int b)
        {
            int a0 = colorBase.A;
            int r0 = colorBase.R;
            int g0 = colorBase.G;
            int b0 = colorBase.B;

            if (a + a0 > 255) { a = 255; } else { a = Math.Max(a + a0, 0); }
            if (r + r0 > 255) { r = 255; } else { r = Math.Max(r + r0, 0); }
            if (g + g0 > 255) { g = 255; } else { g = Math.Max(g + g0, 0); }
            if (b + b0 > 255) { b = 255; } else { b = Math.Max(b + b0, 0); }

            return Color.FromArgb(a, r, g, b);
        }
        #region Field

        private QQControlState _state = QQControlState.Normal;
        private Font _defaultFont = new Font("微软雅黑", 9);

        //当Text属性为空时编辑框内出现的提示文本
        private string _emptyTextTip;
        private Color _emptyTextTipColor = Color.FromArgb(174, 168, 168);

        #endregion

        #region Constructor

        public TextBoxBasicEx()
        {
            SetStyles();
            this.Font = _defaultFont;

        }

        #endregion

        #region Properites

        [Description("当Text属性为空时编辑框内出现的提示文本")]
        public String EmptyTextTip
        {
            get { return _emptyTextTip; }
            set
            {
                if (_emptyTextTip != value)
                {
                    _emptyTextTip = value;
                    base.Invalidate();
                }
            }
        }

        [Description("获取或设置EmptyTextTip的颜色")]
        public Color EmptyTextTipColor
        {
            get { return _emptyTextTipColor; }
            set
            {
                if (_emptyTextTipColor != value)
                {
                    _emptyTextTipColor = value;
                    base.Invalidate();
                }
            }
        }

        #endregion

        #region Override

        protected override void OnMouseEnter(EventArgs e)
        {
            _state = QQControlState.Highlight;
            base.OnMouseEnter(e);
        }

        protected override void OnMouseLeave(EventArgs e)
        {
            //if (_state == QQControlState.Highlight && Focused)
            //{
            //    _state = QQControlState.Focus;
            //}
            //else if (_state == QQControlState.Focus)
            //{
            //    _state = QQControlState.Focus;
            //}
            //else
            //{
            _state = QQControlState.Normal;
            //}
            base.OnMouseLeave(e);
        }

        protected override void OnMouseDown(MouseEventArgs mevent)
        {
            if (mevent.Button == MouseButtons.Left)
            {
                _state = QQControlState.Highlight;
            }
            base.OnMouseDown(mevent);
        }

        protected override void OnMouseUp(MouseEventArgs mevent)
        {
            if (mevent.Button == MouseButtons.Left)
            {
                if (ClientRectangle.Contains(mevent.Location))
                {
                    _state = QQControlState.Highlight;
                }
                else
                {
                    _state = QQControlState.Focus;
                }
            }
            base.OnMouseUp(mevent);
        }

        protected override void OnLostFocus(EventArgs e)
        {
            _state = QQControlState.Normal;
            base.OnLostFocus(e);
        }

        protected override void OnEnabledChanged(EventArgs e)
        {
            if (Enabled)
            {
                _state = QQControlState.Normal;
            }
            else
            {
                _state = QQControlState.Disabled;
            }
            base.OnEnabledChanged(e);
        }

        protected override void WndProc(ref Message m)
        {//TextBox是由系统进程绘制，重载OnPaint方法将不起作用

            base.WndProc(ref m);
            if (m.Msg == Win32.WM_PAINT || m.Msg == Win32.WM_CTLCOLOREDIT)
            {
                WmPaint(ref m);
            }
        }

        protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                if (_defaultFont != null)
                {
                    _defaultFont.Dispose();
                }
            }

            _defaultFont = null;
            base.Dispose(disposing);
        }

        #endregion

        #region Private

        private void SetStyles()
        {
            // TextBox由系统绘制，不能设置 ControlStyles.UserPaint样式
            SetStyle(ControlStyles.AllPaintingInWmPaint, true);
            SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
            SetStyle(ControlStyles.ResizeRedraw, true);
            SetStyle(ControlStyles.SupportsTransparentBackColor, true);
            UpdateStyles();

        }

        private void WmPaint(ref Message m)
        {
            Graphics g = Graphics.FromHwnd(base.Handle);
            g.SmoothingMode = SmoothingMode.HighQuality;

            if (!Enabled)
            {
                _state = QQControlState.Disabled;
            }

            switch (_state)
            {
                case QQControlState.Normal:
                    DrawNormalTextBox(g);
                    break;
                case QQControlState.Highlight:
                    DrawHighLightTextBox(g);
                    break;
                case QQControlState.Focus:
                    DrawFocusTextBox(g);
                    break;
                case QQControlState.Disabled:
                    DrawDisabledTextBox(g);
                    break;
                default:
                    break;
            }

            if (Text.Length == 0 && !string.IsNullOrEmpty(EmptyTextTip) && !Focused)
            {
                TextRenderer.DrawText(g, EmptyTextTip, Font, ClientRectangle, EmptyTextTipColor, GetTextFormatFlags(TextAlign, RightToLeft == RightToLeft.Yes));
            }
        }

        private void DrawNormalTextBox(Graphics g)
        {
            using (Pen borderPen = new Pen(ColorTable.QQHighLightInnerColor))
            {
                g.DrawRectangle(
                    borderPen,
                    new Rectangle(
                        ClientRectangle.X,
                        ClientRectangle.Y,
                        ClientRectangle.Width - 1,
                        ClientRectangle.Height - 1));
            }
        }


        private void DrawHighLightTextBox(Graphics g)
        {

            using (Pen highLightPen = new Pen(ColorTable.QQHighLightColor))
            {
                Rectangle drawRect = new Rectangle(
                        ClientRectangle.X,
                        ClientRectangle.Y,
                        ClientRectangle.Width - 1,
                        ClientRectangle.Height - 1);

             //   g.DrawRectangle(highLightPen, drawRect);

                //InnerRect
               drawRect.Inflate(-1, -1);
                highLightPen.Color = ColorTable.QQHighLightInnerColor;
                g.DrawRectangle(highLightPen, drawRect);
            }
        }

        private void DrawFocusTextBox(Graphics g)
        {
            using (Pen focusedBorderPen = new Pen(ColorTable.QQHighLightInnerColor))
            {
                g.DrawRectangle(
                    focusedBorderPen,
                    new Rectangle(
                        ClientRectangle.X,
                        ClientRectangle.Y,
                        ClientRectangle.Width - 1,
                        ClientRectangle.Height - 1));
            }
        }

        private void DrawDisabledTextBox(Graphics g)
        {
            using (Pen disabledPen = new Pen(ColorTable.QQHighLightInnerColor))
            {
                g.DrawRectangle(disabledPen,
                    new Rectangle(
                        ClientRectangle.X,
                        ClientRectangle.Y,
                        ClientRectangle.Width - 1,
                        ClientRectangle.Height - 1));
            }
        }

        private static TextFormatFlags GetTextFormatFlags(HorizontalAlignment alignment, bool rightToleft)
        {
            TextFormatFlags flags = TextFormatFlags.WordBreak |
                TextFormatFlags.SingleLine;
            if (rightToleft)
            {
                flags |= TextFormatFlags.RightToLeft | TextFormatFlags.Right;
            }

            switch (alignment)
            {
                case HorizontalAlignment.Center:
                    flags |= TextFormatFlags.VerticalCenter | TextFormatFlags.HorizontalCenter;
                    break;
                case HorizontalAlignment.Left:
                    flags |= TextFormatFlags.VerticalCenter | TextFormatFlags.Left;
                    break;
                case HorizontalAlignment.Right:
                    flags |= TextFormatFlags.VerticalCenter | TextFormatFlags.Right;
                    break;
            }
            return flags;
        }

        #endregion

        public class Win32
        {
            #region Window Const

            public const int WM_KEYDOWN = 0x0100;
            public const int WM_KEYUP = 0x0101;
            public const int WM_CTLCOLOREDIT = 0x133;
            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

            #region Public extern methods

            [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("gdi32.dll", EntryPoint = "DeleteObject", CharSet = CharSet.Ansi)]
            public static extern int DeleteObject(int hObject);

            [DllImport("user32.dll")]
            public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);

            [DllImport("user32.dll")]
            public static extern bool ReleaseCapture();

            #endregion


        }

    }
}