LIBMAS/Annotation/FieldView/ViewPolygon.cs

using PaintDotNet.Annotation.Enum;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Globalization;
using System.Runtime.Serialization;
using System.Windows.Forms;

namespace PaintDotNet.Annotation.FieldView
{
    /// <summary>
    /// 多边形视场绘制
    /// </summary>
    public class ViewPolygon : ViewBase
    {
        #region   Constructor
        public ViewPolygon()
        {
            objectType = DrawClass.View;
            drawToolType = DrawToolType.ViewPolygon;
            Rotatable = true;
            Initialize();
        }

        public ViewPolygon(int x, int y) : this()
        {
            AddPoint(x, y);
        }

        public ViewPolygon(List<PointF> points) : this()
        {
            Points = points;
        }
        #endregion

        internal void setNextPoint(Point p)
        {
            AddPoint(p);
        }

        #region HandleCount
        public override int HandleCount
        {
            get
            {   //直到有面积后,才可以出现旋转点
                return Points.Count > 2 ? Points.Count + 1 : Points.Count;
            }
        }

        public override Cursor GetHandleCursor(int handleNumber)
        {
            if (handleNumber > Points.Count)
                return m_rotateCursor;
            else
                return m_resizeCursor;
        }

        public override PointF GetHandle(int handleNumber)
        {
            if (handleNumber > Points.Count)
            {
                var x = (Points[0].X + Points[1].X) / 2;
                var y = (Points[0].Y + Points[1].Y) / 2;
                return new PointF(x, y);
            }
            else
            { return Points[handleNumber - 1]; }
        }

        public override void MoveHandleTo(Point point, int handleNumber)
        {
            if (handleNumber > Points.Count)
                MoveRotate(point);
            else
                Points[handleNumber - 1] = point;
            OnPropertyChanged();
        }
        #endregion

        #region Clone
        public override DrawObject Clone()
        {
            return Clone(ISurfaceBox);
        }

        /// <summary>
        /// Clone this instance
        /// </summary>
        public override DrawObject Clone(ISurfaceBox surfaceBox)
        {
            ViewPolygon drawRectangle = new ViewPolygon(Points);
            drawRectangle.ISurfaceBox = surfaceBox;
            drawRectangle.Color = Color;
            drawRectangle.combineMode = combineMode;
            drawRectangle.ID = ID;
            FillDrawObjectFields(drawRectangle);
            return drawRectangle;
        }
        #endregion
    }
}