using PaintDotNet.Annotation.Enum;
using PaintDotNet.Base.SettingModel;

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Globalization;
using System.Windows.Forms;
using PaintDotNet.Base.CommTool;
using PaintDotNet.Annotation.Measure;
using System.Linq;

namespace PaintDotNet.Annotation.Measure
{
    using PointList = List<PointF>;

    /// <summary>
    /// 测量->长度测量->长度
    /// </summary>
    public class MeasureLength : MeasureDrawObject
    {
        public PointList pointArray;
        private const string entryLength = "Length";
        private const string entryPoint = "Point";

        /// <summary>
        ///  Graphic objects for hit test
        /// </summary>
        private GraphicsPath areaPath = null;
        private Pen areaPen = null;
        private Region areaRegion = null;
        ///<summary>
        ///长度
        ///</summary>
        //private double length = 0.0;
        /// <summary>
        /// 测量信息矩形定义
        /// </summary>
        private RectangleF rectangleF1 = new RectangleF();
        private RectangleF rectangleF2 = new RectangleF();
        private RectangleF rectangleF3 = new RectangleF();
        private RectangleF rectangleF4 = new RectangleF();
        private RectangleF rectangleF5 = new RectangleF();
        private RectangleF rectangleF6 = new RectangleF();
        private RectangleF rectangleF7 = new RectangleF();
        private RectangleF rectangleF8 = new RectangleF();
        private RectangleF rectangleF9 = new RectangleF();
        /// <summary>
        /// 文本上用于拖动的点
        /// </summary>
        private Point pointL = new Point();
        /// <summary>
        /// 绘制限制(第一次绘制时)
        /// </summary>
        public bool pointChange = true;
        /// <summary>
        /// 区分移动文本
        /// </summary>
        private int moveKb;
        /// <summary>
        /// 绘制限制(从配置文件加载)
        /// </summary>
        public bool configurationFile = false;
        /// <summary>
        /// 绘制限制(更改属性时)
        /// </summary>
        private bool SavePointChange;
        /// <summary>
        /// 绘制属性
        /// </summary>
        private string[] drawingPropertiesList;
        /// <summary>
        /// 绘制属性(克隆)
        /// </summary>
        private string[] drawingPropertiesListClone;
        /// <summary>
        /// 旋转角度
        /// </summary>
        private double angleClass;
        /// <summary>
        /// 属性绘制点
        /// </summary>
        private PointF rotationPoint;
        /// <summary>
        /// 限制绘制(绘制中)
        /// </summary>
        public bool mouseUpPointChange = false;
        /// <summary>
        /// 测量样式信息model
        /// </summary>
        private MeasureStyleModel.MeasureLength measureStyleModel;

        public MeasureStyleModel.MeasureLength MeasureStyleModel
        {
            set
            {
                this.measureStyleModel = value;
            }
        }

        public MeasureLength(ISurfaceBox surfaceBox, int x1, int y1, bool clone) : base(surfaceBox)
        {
            this.objectType = DrawClass.Measure;
            this.drawToolType = DrawToolType.MeasureLength;

            measureStyleModel = surfaceBox.GetMeasureStyleModel().measureLength;
            pointArray = new PointList();
            startPoint.X = x1;
            startPoint.Y = y1;
            if(clone)
                pointArray.Add(new Point(x1, y1));
            this.measurementUnit = (MeasurementUnit)System.Enum.Parse(typeof(MeasurementUnit), surfaceBox.GetPxPerUnit()[0]);
            this.unitString = surfaceBox.GetPxPerUnit()[1];
            this.unit = surfaceBox.GetPxPerUnit()[2];
            
            Initialize();
        }

        public MeasureLength(ISurfaceBox surfaceBox, List<PointF> points, ParentStyleModel parentStyleModel, Object content) : base()
        {
            this.objectType = DrawClass.Measure;
            this.drawToolType = DrawToolType.MeasureLength;
            this.ISurfaceBox = surfaceBox;
            measureStyleModel = (MeasureStyleModel.MeasureLength)parentStyleModel;
            pointArray = DrawRulerHelper.DeepCopyListByReflect(points);
            startPoint = points[0];
            this.measurementUnit = (MeasurementUnit)System.Enum.Parse(typeof(MeasurementUnit), surfaceBox.GetPxPerUnit()[0]);
            this.unitString = surfaceBox.GetPxPerUnit()[1];
            this.unit = surfaceBox.GetPxPerUnit()[2];
            
            this.configurationFile = true;
        }

        /// <summary>
        /// Clone this instance
        /// </summary>
        public override DrawObject Clone()
        {
            MeasureLength drawPolygon = new MeasureLength(ISurfaceBox, (int)this.pointArray[0].X, (int)this.pointArray[0].Y, false);
            drawPolygon.ISurfaceBox = ISurfaceBox;
            foreach (PointF p in this.pointArray)
            {
                drawPolygon.pointArray.Add(p);
            }
            if (drawingPropertiesList != null)
                drawPolygon.drawingPropertiesListClone = drawingPropertiesList;
            FillDrawObjectFields(drawPolygon);
            return drawPolygon;
        }

        public override DrawObject Clone(ISurfaceBox surfaceBox)
        {
            MeasureLength drawPolygon = new MeasureLength(surfaceBox, this.GetPoints(), this.measureStyleModel, null);    
            if (drawingPropertiesList != null)
                drawPolygon.drawingPropertiesListClone = drawingPropertiesList;
            FillDrawObjectFields(drawPolygon);
            return drawPolygon;
        }

        /// <summary>
        /// 测量属性
        /// </summary>
        /// <returns></returns>
        public override Dictionary<System.Enum, object> GetData()
        {
            if (data.ContainsKey(MeasureAttributes.MeasureMethod))
                data[MeasureAttributes.MeasureMethod] = PdnResources.GetString("Menu.MeasureAction.LengthMeasurement.Text");
            else
                data.Add(MeasureAttributes.MeasureMethod, PdnResources.GetString("Menu.MeasureAction.LengthMeasurement.Text"));

            if (data.ContainsKey(MeasureAttributes.MeasureUnitCN))
                data[MeasureAttributes.MeasureUnitCN] = this.unitString;
            else
                data.Add(MeasureAttributes.MeasureUnitCN, this.unitString);

            if (data.ContainsKey(MeasureAttributes.MeasureUnitEN))
                data[MeasureAttributes.MeasureUnitEN] = this.unit;
            else
                data.Add(MeasureAttributes.MeasureUnitEN, this.unit);

            if (data.ContainsKey(MeasureAttributes.PixelStartX))
                data[MeasureAttributes.PixelStartX] = startPoint.X;
            else
                data.Add(MeasureAttributes.PixelStartX, startPoint.X);

            if (data.ContainsKey(MeasureAttributes.PixelStartY))
                data[MeasureAttributes.PixelStartY] = startPoint.Y;
            else
                data.Add(MeasureAttributes.PixelStartY, startPoint.Y);

            if (data.ContainsKey(MeasureAttributes.PhysicalStartX))
                data[MeasureAttributes.PhysicalStartX] = Math.Round(startPoint.X * unitLength, decimalPlaces);
            else
                data.Add(MeasureAttributes.PhysicalStartX, Math.Round(startPoint.X * unitLength, decimalPlaces));

            if (data.ContainsKey(MeasureAttributes.PhysicalStartY))
                data[MeasureAttributes.PhysicalStartY] = Math.Round(startPoint.Y * unitLength, decimalPlaces);
            else
                data.Add(MeasureAttributes.PhysicalStartY, Math.Round(startPoint.Y * unitLength, decimalPlaces));

            if (data.ContainsKey(MeasureAttributes.PixelLength))
                data[MeasureAttributes.PixelLength] = Math.Round(length, decimalPlaces);
            else
                data.Add(MeasureAttributes.PixelLength, Math.Round(length, decimalPlaces));

            string s = Math.Round(length * unitLength, decimalPlaces).ToString();
            if (s.IndexOf(".") == -1)
            {
                for (int i = 0; i < decimalPlaces; i++)
                {
                    if (i == 0)
                        s += ".";
                    s += "0";
                }
            }
            else
            {
                int a = s.Length - s.IndexOf(".") - 1;
                if (a < decimalPlaces)
                {
                    for (int i = 0; i < decimalPlaces - a; i++)
                    {
                        s += "0";
                    }
                }
            }
            if (data.ContainsKey(MeasureAttributes.PhysicalLength))
                data[MeasureAttributes.PhysicalLength] = s;
            else
                data.Add(MeasureAttributes.PhysicalLength, s);
            return data;
        }
        
        public override void Draw(Graphics g)
        {
            drawingProperties.TryGetValue(this.drawToolType, out drawingPropertiesList);
            pointChangeObject.TryGetValue(this.drawToolType, out SavePointChange);
            Font textfont = new Font(measureStyleModel.font, measureStyleModel.fontSize);
            Brush textbrush = new SolidBrush(Color.FromArgb(measureStyleModel.textColor));
            g.SmoothingMode = SmoothingMode.AntiAlias;
            Color color = Color.FromArgb(this.measureStyleModel.lineColor);
            Pen pen = new Pen(color, this.measureStyleModel.lineWidth);
            pen.DashStyle = (DashStyle)this.measureStyleModel.lineStyle;
            measureStyleModel = this.ISurfaceBox.GetMeasureStyleModel().measureLength;

            if (this.Selected)
            {
                if (measureStyleModel.chooseStyle != null)
                {
                    textfont = new Font(measureStyleModel.chooseStyle.font, measureStyleModel.chooseStyle.fontSize);
                    textbrush = new SolidBrush(Color.FromArgb(measureStyleModel.chooseStyle.textColor));
                    pen = new Pen(Color.FromArgb(measureStyleModel.chooseStyle.lineColor), measureStyleModel.chooseStyle.lineWidth);
                    pen.DashStyle = (DashStyle)measureStyleModel.chooseStyle.lineStyle;
                }
            }

            if (!this.Selected)
            {
                this.pointChange = true;
                rectangleF1 = new RectangleF();
                rectangleF2 = new RectangleF();
                rectangleF3 = new RectangleF();
                rectangleF4 = new RectangleF();
                rectangleF5 = new RectangleF();
                rectangleF6 = new RectangleF();
                rectangleF7 = new RectangleF();
                rectangleF8 = new RectangleF();
                rectangleF9 = new RectangleF();
            }

            Matrix mtxSave = g.Transform;
            Matrix matrix = g.Transform;

            string frontStr = string.Empty;

            if (this.measureStyleModel.showSuffix)
            {
                frontStr = this.measureStyleModel.suffixName;
            }

            if (this.measureStyleModel.showSerial)
            {

                #region [获取序号]

                List<DrawObject> newGraphicsList = new List<DrawObject>();

                int n = ISurfaceBox.GraphicsList.Count;

                int num = 0;

                for (int i = n - 1; i >= 0; i--)
                {
                    newGraphicsList.Add(ISurfaceBox.GraphicsList[i].Clone());
                }

                var newGraphics = newGraphicsList.Where(m => m.ID.Equals(this.ID)).FirstOrDefault();

                if (newGraphics != null)
                {
                    num = newGraphicsList.IndexOf(newGraphics) + 1;
                }

                #endregion

                frontStr = $"[{ num }]{frontStr}";
            }

            if (this.measureStyleModel.showAlias)
            {

                frontStr = this.measureStyleModel.aliasName + frontStr;
            }

            if (pointArray.Count == 2)
            {
                g.DrawLine(pen, pointArray[0], pointArray[1]);
                length = BasicCalculationHelper.GetDistance(pointArray[0], pointArray[1], 10);
            }
            SizeF sizeF = new SizeF();
            if (pointArray.Count >= 3)
            {
                if (drawingPropertiesList == null)
                {
                    drawingPropertiesList = drawingPropertiesListClone;
                    this.configurationFile = true;
                }
                // 垂足坐标
                PointF footPoint = new PointF();
                // 垂足坐标
                footPoint = BasicCalculationHelper.GetDropFeet(pointArray[1], pointArray[0], pointArray[2]);

                // 点到直线距离
                double lengthF = BasicCalculationHelper.GetDistance(footPoint, pointArray[2], 2);
                // 第二个点与X轴的夹角
                double point2ToX = Math.Round(BasicCalculationHelper.AngleText(pointArray[0],
                    new PointF(pointArray[0].X + 10, pointArray[0].Y), pointArray[1]), 2);
                // 第三个点与X轴的夹角
                double point3ToX = Math.Round(BasicCalculationHelper.AngleText(pointArray[0],
                    new PointF(pointArray[0].X + 10, pointArray[0].Y), pointArray[2]), 2);
                // 两点直线与X轴夹角
                double angle = BasicCalculationHelper.AngleText(pointArray[0], new PointF(pointArray[0].X + 20, pointArray[0].Y), pointArray[1]);
                if (point2ToX > 90)
                {
                    point2ToX = 180 - point2ToX;
                }
                if (point3ToX > 90)
                {
                    point3ToX = 180 - point3ToX;
                }
                if (angle > 90)
                {
                    angle = 180 - angle;
                }
                //判断第二个点相对于第一个点的象限
                int x2 = (int)(pointArray[1].X - pointArray[0].X);
                if (x2 == 0)
                    x2 = 1;
                int y2 = (int)(pointArray[1].Y - pointArray[0].Y);
                if (y2 == 0)
                    y2 = 1;
                int i2 = 0;
                if (x2 > 0 && y2 > 0)             //第4象限
                {
                    i2 = 4;
                }
                else if (x2 > 0 && y2 < 0)      //第1象限
                {
                    i2 = 1;
                }
                else if (x2 < 0 && y2 < 0)       //第2象限
                {
                    i2 = 2;
                }
                else if (x2 < 0 && y2 > 0)          //第3象限
                {
                    i2 = 3;
                }
                //判断第三个点相对于第一个点的象限
                int x3 = (int)(pointArray[2].X - pointArray[0].X);
                if (x3 == 0)
                    x3 = 1;
                int y3 = (int)(pointArray[2].Y - pointArray[0].Y);
                if (y3 == 0)
                    y3 = 1;
                int i3 = 0;
                if (x3 > 0 && y3 > 0)             //第4象限
                {
                    i3 = 4;
                }
                else if (x3 > 0 && y3 < 0)      //第1象限
                {
                    i3 = 1;
                }
                else if (x3 < 0 && y3 < 0)       //第2象限
                {
                    i3 = 2;
                }
                else if (x3 < 0 && y3 > 0)          //第3象限
                {
                    i3 = 3;
                }

                double angle1 = 0.0;
                double angle2 = 0.0;
                if ((pointArray[1].Y == pointArray[0].Y) && (i3 == 1 || i3 == 2))
                {
                    angle1 = 270;
                    angle2 = 90;
                }
                else if ((pointArray[1].Y == pointArray[0].Y) && (i3 == 3 || i3 == 4))
                {
                    angle1 = 90;
                    angle2 = 270;
                }
                else if ((pointArray[1].X == pointArray[0].X) && (i3 == 1 || i3 == 4))
                {
                    angle1 = 0;
                    angle2 = 180;
                }
                else if ((pointArray[1].X == pointArray[0].X) && (i3 == 2 || i3 == 3))
                {
                    angle1 = 180;
                    angle2 = 0;
                }
                else if ((i2 == 1 && i3 == 1) || (i2 == 3 && i3 == 1))
                {
                    if (point3ToX > point2ToX)
                    {
                        angle1 = 270 - angle;
                        angle2 = 90 - angle;
                    }
                    else
                    {
                        angle1 = 90 - angle;
                        angle2 = 270 - angle;
                    }
                }
                else if ((i2 == 1 && i3 == 2) || (i2 == 3 && i3 == 2))
                {
                    angle1 = 270 - angle;
                    angle2 = 90 - angle;
                }
                else if ((i2 == 1 && i3 == 3) || (i2 == 3 && i3 == 3))
                {
                    if (point3ToX > point2ToX)
                    {
                        angle1 = 90 - angle;
                        angle2 = 270 - angle;
                    }
                    else
                    {
                        angle1 = 270 - angle;
                        angle2 = 90 - angle;
                    }
                }
                else if ((i2 == 1 && i3 == 4) || (i2 == 3 && i3 == 4))
                {
                    angle1 = 90 - angle;
                    angle2 = 270 - angle;
                }
                else if ((i2 == 2 && i3 == 1) || (i2 == 4 && i3 == 1))
                {
                    angle1 = 270 + angle;
                    angle2 = 90 + angle;
                }
                else if ((i2 == 2 && i3 == 2) || (i2 == 4 && i3 == 2))
                {
                    if (point3ToX > point2ToX)
                    {
                        angle1 = 270 + angle;
                        angle2 = 90 + angle;
                    }
                    else
                    {
                        angle1 = 90 + angle;
                        angle2 = 270 + angle;
                    }
                }
                else if ((i2 == 2 && i3 == 3) || (i2 == 4 && i3 == 3))
                {
                    angle1 = 90 + angle;
                    angle2 = 270 + angle;
                }
                else if ((i2 == 2 && i3 == 4) || (i2 == 4 && i3 == 4))
                {
                    if (point3ToX > point2ToX)
                    {
                        angle1 = 90 + angle;
                        angle2 = 270 + angle;

                    }
                    else
                    {
                        angle1 = 270 + angle;
                        angle2 = 90 + angle;
                    }
                }
                PointF point = BasicCalculationHelper.GetAnglePoint(new PointF(pointArray[0].X + (int)lengthF,
                    pointArray[0].Y), pointArray[0], angle1);
                PointF point1 = BasicCalculationHelper.GetAnglePoint(new PointF(pointArray[1].X - (int)lengthF,
                    pointArray[1].Y), pointArray[1], angle2);
                // 求中点坐标
                float x = (point.X + point1.X) / 2;
                float y = (point.Y + point1.Y) / 2;
                // 绘制长度
                g.DrawLine(pen, point, point1);
                g.DrawLine(pen, point, pointArray[0]);
                g.DrawLine(pen, point1, pointArray[1]);
                // 长度
                length = BasicCalculationHelper.GetDistance(pointArray[0], pointArray[1], 10);
                pen.Dispose();
                //计算需要旋转的角度
                this.angleClass = BasicCalculationHelper.Angle(point, point1, new PointF(point.X, point1.Y));

                int offsetValuePoint = measureStyleModel.fontSize + measureStyleModel.fontSize / 2;
                int offsetValue1Point = measureStyleModel.lineWidth * 2 / 3;
                int offsetPoint = offsetValue1Point;
                if (drawingPropertiesList != null)
                {
                    // 像素长度
                    if (drawingPropertiesList.Contains(MeasureAttributes.PixelLength.ToString()))
                    {
                        offsetPoint += offsetValuePoint;
                    }
                    // 物理长度
                    if (drawingPropertiesList.Contains(MeasureAttributes.PhysicalLength.ToString()))
                    {
                        offsetPoint += offsetValuePoint;
                    }
                    // 测量方式
                    if (drawingPropertiesList.Contains(MeasureAttributes.MeasureMethod.ToString()))
                    {
                        offsetPoint += offsetValuePoint;
                    }
                    // 测量单位(中文)
                    if (drawingPropertiesList.Contains(MeasureAttributes.MeasureUnitCN.ToString()))
                    {
                        offsetPoint += offsetValuePoint;
                    }
                    // 测量单位(英文)
                    if (drawingPropertiesList.Contains(MeasureAttributes.MeasureUnitEN.ToString()))
                    {
                        offsetPoint += offsetValuePoint;
                    }
                    // 像素起始点X
                    if (drawingPropertiesList.Contains(MeasureAttributes.PixelStartX.ToString()))
                    {
                        offsetPoint += offsetValuePoint;
                    }
                    // 像素起始点Y
                    if (drawingPropertiesList.Contains(MeasureAttributes.PixelStartY.ToString()))
                    {
                        offsetPoint += offsetValuePoint;
                    }
                    // 物理起始点X
                    if (drawingPropertiesList.Contains(MeasureAttributes.PhysicalStartX.ToString()))
                    {
                        offsetPoint += offsetValuePoint;
                    }
                    // 物理起始点Y
                    if (drawingPropertiesList.Contains(MeasureAttributes.PhysicalStartY.ToString()))
                    {
                        offsetPoint += offsetValuePoint;
                    }
                }
                PointF pointF1;
                PointF pointF2;

                if (angleClass < 90)
                    pointF1 = BasicCalculationHelper.GetAnglePoint(new Point((int)point.X + offsetPoint + offsetValue1Point, (int)point.Y), point, angleClass - 90);
                else
                    pointF1 = BasicCalculationHelper.GetAnglePoint(new Point((int)point.X + offsetPoint + offsetValue1Point, (int)point.Y), point, angleClass + 90);
                if (angleClass < 90)
                    pointF2 = BasicCalculationHelper.GetAnglePoint(new Point((int)point1.X + offsetPoint + offsetValue1Point, (int)point1.Y), point1, angleClass - 90);
                else
                    pointF2 = BasicCalculationHelper.GetAnglePoint(new Point((int)point1.X + offsetPoint + offsetValue1Point, (int)point1.Y), point1, angleClass + 90);
                PointF pointF3 = new PointF((pointF1.X + pointF2.X) / 2, (pointF1.Y + pointF2.Y) / 2);

                if (measureStyleModel.linePosition == 0)
                    this.rotationPoint = pointArray[0];
                else if (measureStyleModel.linePosition == 1)
                    this.rotationPoint = pointF3;
                else if (measureStyleModel.linePosition == 2)
                    this.rotationPoint = pointArray[1];
                else if (measureStyleModel.linePosition == 3)
                    this.rotationPoint = point;
                else if (measureStyleModel.linePosition == 4)
                    this.rotationPoint = new PointF(x, y);
                else if (measureStyleModel.linePosition == 5)
                    this.rotationPoint = point1;
                // 画布旋转
                if (this.angleClass < 90)
                {
                    matrix.RotateAt((float)this.angleClass, this.rotationPoint);
                    g.Transform = matrix;
                }
                else
                {
                    this.angleClass = BasicCalculationHelper.Angle(point1, point, new PointF(point1.X, point.Y));
                    matrix.RotateAt((float)this.angleClass, this.rotationPoint);
                    g.Transform = matrix;
                }
                // 是否绘制
                if (this.pointChange || this.SavePointChange || this.mouseUpPointChange || this.mouseUpAttribute)
                {
                    // 属性文本的间隔定义
                    int offsetValue = measureStyleModel.fontSize + measureStyleModel.fontSize / 2;
                    int offsetValue1 = measureStyleModel.lineWidth * 2 / 3;
                    int offset = offsetValue1;
                    this.pointL = new Point((int)this.rotationPoint.X, (int)this.rotationPoint.Y);
                    if (drawingPropertiesList != null)
                    {
                        // 像素长度
                        if (drawingPropertiesList.Contains(MeasureAttributes.PixelLength.ToString()))
                        {
                            sizeF = g.MeasureString(frontStr + Math.Round(length, decimalPlaces) + "px", textfont);
                            rectangleF8.Location = new Point((int)this.rotationPoint.X + offsetValue1 - (int)sizeF.Width / 2, (int)this.rotationPoint.Y + offset);
                            offset += offsetValue;
                        }
                        // 物理长度
                        if (drawingPropertiesList.Contains(MeasureAttributes.PhysicalLength.ToString()))
                        {
                            string s = Math.Round(length * unitLength, decimalPlaces).ToString();
                            if (s.IndexOf(".") == -1)
                            {
                                for (int i = 0; i < decimalPlaces; i++)
                                {
                                    if (i == 0)
                                        s += ".";
                                    s += "0";
                                }
                            }
                            else
                            {
                                int a = s.Length - s.IndexOf(".") - 1;
                                if (a < decimalPlaces)
                                {
                                    for (int i = 0; i < decimalPlaces - a; i++)
                                    {
                                        s += "0";
                                    }
                                }
                            }

                            sizeF = g.MeasureString(frontStr + s + this.unit, textfont);
                            rectangleF9.Location = new Point((int)this.rotationPoint.X + offsetValue1 - (int)sizeF.Width / 2, (int)this.rotationPoint.Y + offset);
                            offset += offsetValue;
                        }
                        // 测量方式
                        if (drawingPropertiesList.Contains(MeasureAttributes.MeasureMethod.ToString()))
                        {
                            sizeF = g.MeasureString(frontStr + PdnResources.GetString("Menu.MeasureAction.LengthMeasurement.Text"), textfont);
                            rectangleF1.Location = new Point((int)this.rotationPoint.X + offsetValue1 - (int)sizeF.Width / 2, (int)this.rotationPoint.Y + offset);
                            offset += offsetValue;
                        }
                        // 测量单位(中文)
                        if (drawingPropertiesList.Contains(MeasureAttributes.MeasureUnitCN.ToString()))
                        {
                            sizeF = g.MeasureString(frontStr + this.unitString, textfont);
                            rectangleF2.Location = new Point((int)this.rotationPoint.X + offsetValue1 - (int)sizeF.Width / 2, (int)this.rotationPoint.Y + offset);
                            offset += offsetValue;
                        }
                        // 测量单位(英文)
                        if (drawingPropertiesList.Contains(MeasureAttributes.MeasureUnitEN.ToString()))
                        {
                            sizeF = g.MeasureString(frontStr + this.unit, textfont);
                            rectangleF3.Location = new Point((int)this.rotationPoint.X + offsetValue1 - (int)sizeF.Width / 2, (int)this.rotationPoint.Y + offset);
                            offset += offsetValue;
                        }
                        // 像素起始点X
                        if (drawingPropertiesList.Contains(MeasureAttributes.PixelStartX.ToString()))
                        {
                            sizeF = g.MeasureString(frontStr + pointArray[0].X, textfont);
                            rectangleF4.Location = new Point((int)this.rotationPoint.X + offsetValue1 - (int)sizeF.Width / 2, (int)this.rotationPoint.Y + offset);
                            offset += offsetValue;
                        }
                        // 像素起始点Y
                        if (drawingPropertiesList.Contains(MeasureAttributes.PixelStartY.ToString()))
                        {
                            sizeF = g.MeasureString(frontStr + pointArray[0].Y, textfont);
                            rectangleF5.Location = new Point((int)this.rotationPoint.X + offsetValue1 - (int)sizeF.Width / 2, (int)this.rotationPoint.Y + offset);
                            offset += offsetValue;
                        }
                        // 物理起始点X
                        if (drawingPropertiesList.Contains(MeasureAttributes.PhysicalStartX.ToString()))
                        {
                            sizeF = g.MeasureString(frontStr + Math.Round(pointArray[0].X * unitLength, decimalPlaces), textfont);
                            rectangleF6.Location = new Point((int)this.rotationPoint.X + offsetValue1 - (int)sizeF.Width / 2, (int)this.rotationPoint.Y + offset);
                            offset += offsetValue;
                        }
                        // 物理起始点Y
                        if (drawingPropertiesList.Contains(MeasureAttributes.PhysicalStartY.ToString()))
                        {
                            sizeF = g.MeasureString(frontStr + Math.Round(pointArray[0].Y * unitLength, decimalPlaces), textfont);
                            rectangleF7.Location = new Point((int)this.rotationPoint.X + offsetValue1 - (int)sizeF.Width / 2, (int)this.rotationPoint.Y + offset);
                            offset += offsetValue;
                        }
                    }
                }
                if (drawingPropertiesList != null)
                {
                    // 测量方式
                    if (drawingPropertiesList.Contains(MeasureAttributes.MeasureMethod.ToString()))
                    {
                        sizeF = g.MeasureString(frontStr + PdnResources.GetString("Menu.MeasureAction.LengthMeasurement.Text"), textfont);
                        rectangleF1.Width = sizeF.Width;
                        rectangleF1.Height = sizeF.Height;
                        g.DrawString(frontStr + PdnResources.GetString("Menu.MeasureAction.LengthMeasurement.Text"), textfont, textbrush, rectangleF1);
                    }
                    else
                    {
                        rectangleF1 = new RectangleF();
                    }
                    // 测量单位(中文)
                    if (drawingPropertiesList.Contains(MeasureAttributes.MeasureUnitCN.ToString()))
                    {
                        sizeF = g.MeasureString(frontStr + this.unitString, textfont);
                        rectangleF2.Width = sizeF.Width;
                        rectangleF2.Height = sizeF.Height;
                        g.DrawString(frontStr + this.unitString, textfont, textbrush, rectangleF2);
                    }
                    else
                    {
                        rectangleF2 = new RectangleF();
                    }
                    // 测量单位(英文)
                    if (drawingPropertiesList.Contains(MeasureAttributes.MeasureUnitEN.ToString()))
                    {
                        sizeF = g.MeasureString(frontStr + this.unit, textfont);
                        rectangleF3.Width = sizeF.Width;
                        rectangleF3.Height = sizeF.Height;
                        g.DrawString(frontStr + this.unit, textfont, textbrush, rectangleF3);
                    }
                    else
                    {
                        rectangleF3 = new RectangleF();
                    }
                    // 像素起始点X
                    if (drawingPropertiesList.Contains(MeasureAttributes.PixelStartX.ToString()))
                    {
                        sizeF = g.MeasureString(frontStr + pointArray[0].X, textfont);
                        rectangleF4.Width = sizeF.Width;
                        rectangleF4.Height = sizeF.Height;
                        g.DrawString(frontStr + pointArray[0].X, textfont, textbrush, rectangleF4);
                    }
                    else
                    {
                        rectangleF4 = new RectangleF();
                    }
                    // 像素起始点Y
                    if (drawingPropertiesList.Contains(MeasureAttributes.PixelStartY.ToString()))
                    {
                        sizeF = g.MeasureString(frontStr + pointArray[0].Y, textfont);
                        rectangleF5.Width = sizeF.Width;
                        rectangleF5.Height = sizeF.Height;
                        g.DrawString(frontStr + pointArray[0].Y, textfont, textbrush, rectangleF5);
                    }
                    else
                    {
                        rectangleF5 = new RectangleF();
                    }
                    // 物理起始点X
                    if (drawingPropertiesList.Contains(MeasureAttributes.PhysicalStartX.ToString()))
                    {
                        sizeF = g.MeasureString(frontStr + Math.Round(pointArray[0].X * unitLength, decimalPlaces), textfont);
                        rectangleF6.Width = sizeF.Width;
                        rectangleF6.Height = sizeF.Height;
                        g.DrawString(frontStr + Math.Round(pointArray[0].X * unitLength, decimalPlaces), textfont, textbrush, rectangleF6);
                    }
                    else
                    {
                        rectangleF6 = new RectangleF();
                    }
                    // 物理起始点Y
                    if (drawingPropertiesList.Contains(MeasureAttributes.PhysicalStartY.ToString()))
                    {
                        sizeF = g.MeasureString(frontStr + Math.Round(pointArray[0].Y * unitLength, decimalPlaces), textfont);
                        rectangleF7.Width = sizeF.Width;
                        rectangleF7.Height = sizeF.Height;
                        g.DrawString(frontStr + Math.Round(pointArray[0].Y * unitLength, decimalPlaces), textfont, textbrush, rectangleF7);
                    }
                    else
                    {
                        rectangleF7 = new RectangleF();
                    }
                    // 像素长度
                    if (drawingPropertiesList.Contains(MeasureAttributes.PixelLength.ToString()))
                    {
                        sizeF = g.MeasureString(frontStr + Math.Round(length, decimalPlaces) + "px", textfont);
                        rectangleF8.Width = sizeF.Width;
                        rectangleF8.Height = sizeF.Height;
                        g.DrawString(frontStr + Math.Round(length, decimalPlaces) + "px", textfont, textbrush, rectangleF8);
                    }
                    else
                    {
                        rectangleF8 = new RectangleF();
                    }
                    // 物理长度
                    if (drawingPropertiesList.Contains(MeasureAttributes.PhysicalLength.ToString()))
                    {
                        string s = Math.Round(length * unitLength, decimalPlaces).ToString();
                        if (s.IndexOf(".") == -1)
                        {
                            for (int i = 0; i < decimalPlaces; i++)
                            {
                                if (i == 0)
                                    s += ".";
                                s += "0";
                            }
                        }
                        else
                        {
                            int a = s.Length - s.IndexOf(".") - 1;
                            if (a < decimalPlaces)
                            {
                                for (int i = 0; i < decimalPlaces - a; i++)
                                {
                                    s += "0";
                                }
                            }
                        }

                        sizeF = g.MeasureString(frontStr + s + this.unit, textfont);
                        rectangleF9.Width = sizeF.Width;
                        rectangleF9.Height = sizeF.Height;
                        g.DrawString(frontStr + s + this.unit, textfont, textbrush, rectangleF9);
                    }
                    else
                    {
                        rectangleF9 = new RectangleF();
                    }
                }
                //还原为原始旋转矩阵
                g.Transform = mtxSave;
            }
            matrix.Dispose();
            if (this.configurationFile)
                this.pointChange = false;
            this.mouseUpAttribute = false;
            pointChangeObject.Remove(this.drawToolType);
        }
        /// <summary>
        /// 停止绘制时
        /// </summary>
        /// <param name="up"></param>
        public override void MouseUp(bool up)
        {
            mouseUpPointChange = up;
        }
        public void AddPoint(Point point)
        {
            pointArray.Add(point);
        }

        public override int HandleCount
        {
            get
            {
                return 6;
            }
        }

        /// <summary>
        /// Get handle pointscroll by 1-based number
        /// </summary>
        /// <param name="handleNumber"></param>
        /// <returns></returns>
        public override PointF GetHandle(int handleNumber)
        {
            if (handleNumber < 1)
                handleNumber = 1;

            if (handleNumber > pointArray.Count && handleNumber <= 3)
                handleNumber = pointArray.Count;
            if (handleNumber == 1)
                return pointArray[0];
            else if (handleNumber == 2)
                return pointArray[1];
            else if (handleNumber == 6)
                return pointL;
            else if (handleNumber > 2 && pointArray.Count >= 3)
            {
                // 垂足坐标
                PointF footPoint = new PointF();
                // 垂足坐标
                footPoint = BasicCalculationHelper.GetDropFeet(pointArray[1], pointArray[0], pointArray[2]);

                // 点到直线距离
                double length = BasicCalculationHelper.GetDistance(footPoint, pointArray[2], 2);
                // 第二个点与X轴的夹角
                double point2ToX = Math.Round(BasicCalculationHelper.AngleText(pointArray[0],
                    new PointF(pointArray[0].X + 10, pointArray[0].Y), pointArray[1]), 2);
                // 第三个点与X轴的夹角
                double point3ToX = Math.Round(BasicCalculationHelper.AngleText(pointArray[0],
                    new PointF(pointArray[0].X + 10, pointArray[0].Y), pointArray[2]), 2);
                // 两点直线与X轴夹角
                double angle = BasicCalculationHelper.AngleText(pointArray[0], new PointF(pointArray[0].X + 20, pointArray[0].Y), pointArray[1]);
                if (point2ToX > 90)
                {
                    point2ToX = 180 - point2ToX;
                }
                if (point3ToX > 90)
                {
                    point3ToX = 180 - point3ToX;
                }
                if (angle > 90)
                {
                    angle = 180 - angle;
                }
                //判断第二个点相对于第一个点的象限
                int x2 = (int)(pointArray[1].X - pointArray[0].X);
                if (x2 == 0)
                    x2 = 1;
                int y2 = (int)(pointArray[1].Y - pointArray[0].Y);
                if (y2 == 0)
                    y2 = 1;
                int i2 = 0;
                if (x2 > 0 && y2 > 0)             //第4象限
                {
                    i2 = 4;
                }
                else if (x2 > 0 && y2 < 0)      //第1象限
                {
                    i2 = 1;
                }
                else if (x2 < 0 && y2 < 0)       //第2象限
                {
                    i2 = 2;
                }
                else if (x2 < 0 && y2 > 0)          //第3象限
                {
                    i2 = 3;
                }
                //判断第三个点相对于第一个点的象限
                int x3 = (int)(pointArray[2].X - pointArray[0].X);
                if (x3 == 0)
                    x3 = 1;
                int y3 = (int)(pointArray[2].Y - pointArray[0].Y);
                if (y3 == 0)
                    y3 = 1;
                int i3 = 0;
                if (x3 > 0 && y3 > 0)             //第4象限
                {
                    i3 = 4;
                }
                else if (x3 > 0 && y3 < 0)      //第1象限
                {
                    i3 = 1;
                }
                else if (x3 < 0 && y3 < 0)       //第2象限
                {
                    i3 = 2;
                }
                else if (x3 < 0 && y3 > 0)          //第3象限
                {
                    i3 = 3;
                }

                double angle1 = 0.0;
                double angle2 = 0.0;
                if ((pointArray[1].Y == pointArray[0].Y) && (i3 == 1 || i3 == 2))
                {
                    angle1 = 270;
                    angle2 = 90;
                }
                else if ((pointArray[1].Y == pointArray[0].Y) && (i3 == 3 || i3 == 4))
                {
                    angle1 = 90;
                    angle2 = 270;
                }
                else if ((pointArray[1].X == pointArray[0].X) && (i3 == 1 || i3 == 4))
                {
                    angle1 = 0;
                    angle2 = 180;
                }
                else if ((pointArray[1].X == pointArray[0].X) && (i3 == 2 || i3 == 3))
                {
                    angle1 = 180;
                    angle2 = 0;
                }
                else if ((i2 == 1 && i3 == 1) || (i2 == 3 && i3 == 1))
                {
                    if (point3ToX > point2ToX)
                    {
                        angle1 = 270 - angle;
                        angle2 = 90 - angle;
                    }
                    else
                    {
                        angle1 = 90 - angle;
                        angle2 = 270 - angle;
                    }
                }
                else if ((i2 == 1 && i3 == 2) || (i2 == 3 && i3 == 2))
                {
                    angle1 = 270 - angle;
                    angle2 = 90 - angle;
                }
                else if ((i2 == 1 && i3 == 3) || (i2 == 3 && i3 == 3))
                {
                    if (point3ToX > point2ToX)
                    {
                        angle1 = 90 - angle;
                        angle2 = 270 - angle;
                    }
                    else
                    {
                        angle1 = 270 - angle;
                        angle2 = 90 - angle;
                    }
                }
                else if ((i2 == 1 && i3 == 4) || (i2 == 3 && i3 == 4))
                {
                    angle1 = 90 - angle;
                    angle2 = 270 - angle;
                }
                else if ((i2 == 2 && i3 == 1) || (i2 == 4 && i3 == 1))
                {
                    angle1 = 270 + angle;
                    angle2 = 90 + angle;
                }
                else if ((i2 == 2 && i3 == 2) || (i2 == 4 && i3 == 2))
                {
                    if (point3ToX > point2ToX)
                    {
                        angle1 = 270 + angle;
                        angle2 = 90 + angle;
                    }
                    else
                    {
                        angle1 = 90 + angle;
                        angle2 = 270 + angle;
                    }
                }
                else if ((i2 == 2 && i3 == 3) || (i2 == 4 && i3 == 3))
                {
                    angle1 = 90 + angle;
                    angle2 = 270 + angle;
                }
                else if ((i2 == 2 && i3 == 4) || (i2 == 4 && i3 == 4))
                {
                    if (point3ToX > point2ToX)
                    {
                        angle1 = 90 + angle;
                        angle2 = 270 + angle;

                    }
                    else
                    {
                        angle1 = 270 + angle;
                        angle2 = 90 + angle;
                    }
                }
                PointF point = BasicCalculationHelper.GetAnglePoint(new PointF(pointArray[0].X + (int)length,
                    pointArray[0].Y), pointArray[0], angle1);
                PointF point1 = BasicCalculationHelper.GetAnglePoint(new PointF(pointArray[1].X - (int)length,
                    pointArray[1].Y), pointArray[1], angle2);
                // 求中点坐标
                float x = (point.X + point1.X) / 2;
                float y = (point.Y + point1.Y) / 2;

                if (handleNumber == 3)
                    return point;
                else if (handleNumber == 4)
                    return point1;
                else
                    return new PointF(x, y);
            }
            else
            {
                return pointArray[0];
            }
        }

        public override Cursor GetHandleCursor(int handleNumber)
        {
            return handleCursor;
        }

        public override void MoveHandleTo(Point point, int handleNumber)
        {
            if (handleNumber < 1)
                handleNumber = 1;

            if (handleNumber > pointArray.Count && handleNumber != 6)
                handleNumber = pointArray.Count;
            if (handleNumber == 6)
            {
                point = SetOffsetAfterRotation(point, this.rotationPoint, this.angleClass);
                if (this.moveKb == 1)
                    this.rectangleF1.Offset(point.X - this.pointL.X, point.Y - this.pointL.Y);
                else if (this.moveKb == 2)
                    this.rectangleF2.Offset(point.X - this.pointL.X, point.Y - this.pointL.Y);
                else if (this.moveKb == 3)
                    this.rectangleF3.Offset(point.X - this.pointL.X, point.Y - this.pointL.Y);
                else if (this.moveKb == 4)
                    this.rectangleF4.Offset(point.X - this.pointL.X, point.Y - this.pointL.Y);
                else if (this.moveKb == 5)
                    this.rectangleF5.Offset(point.X - this.pointL.X, point.Y - this.pointL.Y);
                else if (this.moveKb == 6)
                    this.rectangleF6.Offset(point.X - this.pointL.X, point.Y - this.pointL.Y);
                else if (this.moveKb == 7)
                    this.rectangleF7.Offset(point.X - this.pointL.X, point.Y - this.pointL.Y);
                else if (this.moveKb == 8)
                    this.rectangleF8.Offset(point.X - this.pointL.X, point.Y - this.pointL.Y);
                else if (this.moveKb == 9)
                    this.rectangleF9.Offset(point.X - this.pointL.X, point.Y - this.pointL.Y);
                this.pointL = point;
            }
            else
            {
                this.mouseUpPointChange = true;
                if (handleNumber == 1)
                {
                    this.rectangleF1.Offset(point.X - this.pointArray[0].X, point.Y - this.pointArray[0].Y);
                    this.rectangleF2.Offset(point.X - this.pointArray[0].X, point.Y - this.pointArray[0].Y);
                    this.rectangleF3.Offset(point.X - this.pointArray[0].X, point.Y - this.pointArray[0].Y);
                    this.rectangleF4.Offset(point.X - this.pointArray[0].X, point.Y - this.pointArray[0].Y);
                    this.rectangleF5.Offset(point.X - this.pointArray[0].X, point.Y - this.pointArray[0].Y);
                    this.rectangleF6.Offset(point.X - this.pointArray[0].X, point.Y - this.pointArray[0].Y);
                    this.rectangleF7.Offset(point.X - this.pointArray[0].X, point.Y - this.pointArray[0].Y);
                    this.rectangleF8.Offset(point.X - this.pointArray[0].X, point.Y - this.pointArray[0].Y);
                    this.rectangleF9.Offset(point.X - this.pointArray[0].X, point.Y - this.pointArray[0].Y);
                }
                pointArray[handleNumber - 1] = point;
            }
            this.startPoint = pointArray[0];
            Invalidate();
        }

        public override void Move(int deltaX, int deltaY)
        {
            int n = pointArray.Count;
            PointF point;

            for (int i = 0; i < n; i++)
            {
                point = new PointF(pointArray[i].X + ISurfaceBox.UnscaleScalar(deltaX), pointArray[i].Y + ISurfaceBox.UnscaleScalar(deltaY));

                pointArray[i] = point;
            }
            this.startPoint = pointArray[0];
            int x = ISurfaceBox.UnscaleScalar(deltaX);
            int y = ISurfaceBox.UnscaleScalar(deltaY);
            pointL.X += x;
            pointL.Y += y;
            this.rectangleF1.Offset(x, y);
            this.rectangleF2.Offset(x, y);
            this.rectangleF3.Offset(x, y);
            this.rectangleF4.Offset(x, y);
            this.rectangleF5.Offset(x, y);
            this.rectangleF6.Offset(x, y);
            this.rectangleF7.Offset(x, y);
            this.rectangleF8.Offset(x, y);
            this.rectangleF9.Offset(x, y);
            Invalidate();
        }

        /// <summary>
        /// 用于创建一个路径或者是闭合的范围
        /// 用于响应点击选中
        /// 需要咨询用户是仅点击线还是矩形选择
        /// </summary>
        protected virtual void CreateObjects()
        {
            if (AreaPath != null)
                return;

            AreaPath = new GraphicsPath();
            AreaPath.AddRectangle(GetBoundingBox());
            AreaPath.CloseFigure();
            AreaRegion = new Region(AreaPath);
        }

        /// <summary>
        /// Invalidate object.
        /// When object is invalidated, path used for hit test
        /// is released and should be created again.
        /// </summary>
        protected void Invalidate()
        {
            if (AreaPath != null)
            {
                AreaPath.Dispose();
                AreaPath = null;
            }

            if (AreaPen != null)
            {
                AreaPen.Dispose();
                AreaPen = null;
            }

            if (AreaRegion != null)
            {
                AreaRegion.Dispose();
                AreaRegion = null;
            }
        }
        protected GraphicsPath AreaPath
        {
            get
            {
                return areaPath;
            }
            set
            {
                areaPath = value;
            }
        }

        protected Pen AreaPen
        {
            get
            {
                return areaPen;
            }
            set
            {
                areaPen = value;
            }
        }

        protected Region AreaRegion
        {
            get
            {
                return areaRegion;
            }
            set
            {
                areaRegion = value;
            }
        }

        /// <summary>
        /// Draw tracker for selected object
        /// </summary>
        /// <param name="g"></param>
        public override void DrawTracker(Graphics g)
        {
            if (!Selected)
                return;
            SolidBrush brush = new SolidBrush(Color.FromArgb(MarkpointAreaColor));
            Pen pen = new Pen(Color.FromArgb(MarkpointLineColor), MarkpointLineWidth);
            for (int i = 1; i <= HandleCount; i++)
            {
                if (i == 6)
                {
                    brush = new SolidBrush(Color.Transparent);
                    pen = new Pen(Color.Transparent);
                }
                switch (MarkpointStyle)
                {
                    case 0:
                        g.FillRectangle(brush, GetHandleRectangle(i));
                        g.DrawRectangle(pen, GetHandleRectangle(i));
                        break;
                    case 1:
                        g.FillEllipse(brush, GetHandleRectangle(i));
                        g.DrawEllipse(pen, GetHandleRectangle(i));
                        break;
                    case 2:
                        g.FillPolygon(brush, GetHandlePoint(i));
                        g.DrawPolygon(pen, GetHandlePoint(i));
                        break;
                }
            }
            pen.Dispose();
            brush.Dispose();
        }

        /// <summary>
        /// Hit test.
        /// Return value: -1 - no hit
        ///                0 - hit anywhere
        ///                > 1 - handle number
        /// </summary>
        /// <param name="pointscroll"></param>
        /// <returns></returns>
        public override int HitTest(Point point)
        {
            if (Selected)
            {
                for (int i = 1; i <= HandleCount; i++)
                {
                    if (GetHandleRectangle(i).Contains(point))
                        return i;
                }
                if (GetRectanglePosition(this.rectangleF1, point, this.rotationPoint, this.angleClass))
                {
                    this.pointL = SetOffsetAfterRotation(point, this.rotationPoint, this.angleClass);
                    moveKb = 1;
                    return 6;
                }
                else if (GetRectanglePosition(this.rectangleF2, point, this.rotationPoint, this.angleClass))
                {
                    this.pointL = SetOffsetAfterRotation(point, this.rotationPoint, this.angleClass);
                    moveKb = 2;
                    return 6;
                }
                else if (GetRectanglePosition(this.rectangleF3, point, this.rotationPoint, this.angleClass))
                {
                    this.pointL = SetOffsetAfterRotation(point, this.rotationPoint, this.angleClass);
                    moveKb = 3;
                    return 6;
                }
                else if (GetRectanglePosition(this.rectangleF4, point, this.rotationPoint, this.angleClass))
                {
                    this.pointL = SetOffsetAfterRotation(point, this.rotationPoint, this.angleClass);
                    moveKb = 4;
                    return 6;
                }
                else if (GetRectanglePosition(this.rectangleF5, point, this.rotationPoint, this.angleClass))
                {
                    this.pointL = SetOffsetAfterRotation(point, this.rotationPoint, this.angleClass);
                    moveKb = 5;
                    return 6;
                }
                else if (GetRectanglePosition(this.rectangleF6, point, this.rotationPoint, this.angleClass))
                {
                    this.pointL = SetOffsetAfterRotation(point, this.rotationPoint, this.angleClass);
                    moveKb = 6;
                    return 6;
                }
                else if (GetRectanglePosition(this.rectangleF7, point, this.rotationPoint, this.angleClass))
                {
                    this.pointL = SetOffsetAfterRotation(point, this.rotationPoint, this.angleClass);
                    moveKb = 7;
                    return 6;
                }
                else if (GetRectanglePosition(this.rectangleF8, point, this.rotationPoint, this.angleClass))
                {
                    this.pointL = SetOffsetAfterRotation(point, this.rotationPoint, this.angleClass);
                    moveKb = 8;
                    return 6;
                }
                else if (GetRectanglePosition(this.rectangleF9, point, this.rotationPoint, this.angleClass))
                {
                    this.pointL = SetOffsetAfterRotation(point, this.rotationPoint, this.angleClass);
                    moveKb = 9;
                    return 6;
                }
            }

            if (PointInObject(point))
                return 0;

            return -1;
        }

        protected override bool PointInObject(Point point)
        {
            CreateObjects();

            return AreaRegion.IsVisible(point);
        }
        public override bool IntersectsWith(Rectangle rectangle)
        {
            CreateObjects();

            return AreaRegion.IsVisible(rectangle);
        }
        public override RectangleF GetBoundingBox()
        {
            Rectangle rectangle;
            int minx = 0, maxx = 0, miny = 0, maxy = 0;
            for (int i = 0; i < pointArray.Count; i++)
            {
                if (i == 0)
                {
                    minx = maxx = (int)pointArray[i].X;
                    miny = maxy = (int)pointArray[i].Y;
                }
                else
                {
                    if (pointArray[i].X > maxx) maxx = (int)pointArray[i].X;
                    if (pointArray[i].X < minx) minx = (int)pointArray[i].X;
                    if (pointArray[i].Y > maxy) maxy = (int)pointArray[i].Y;
                    if (pointArray[i].Y < miny) miny = (int)pointArray[i].Y;
                }
            }
            rectangle = new Rectangle(minx, miny, maxx - minx, maxy - miny);

            return rectangle;
        }

        internal void setNextPoint(Point p)
        {
            AddPoint(p);
            startPoint = endPoint;
            endPoint = p;
        }

        internal void setEndPoint(Point p)
        {
            endPoint = p;
        }
        public override List<PointF> GetPoints()
        {
            return pointArray;
        }

        public override ParentStyleModel GetStyle()
        {
            return measureStyleModel;
        }
    }
}