通用jig类，用到委托

/// 通用jig类，用到委托，by houlinbo QQ420021327
using System;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.GraphicsInterface;
using Autodesk.AutoCAD.Runtime;
using System.Collections.Generic;
namespace ArxHlb
{

    //委托类
    public delegate void DelegateJig(Entity ent, Point3d ptBase, Point3d ptTo);


    //jig的入口类
    public class CADJigDelegate
    {
        /// <summary>
        ///  入口函数
        /// </summary>
        /// <param name="ed">ed</param>
        /// <param name="lstEnt">实体列表</param>
        /// <param name="promp">提示</param>
        /// <returns></returns>
        public static bool Jig(Editor ed, List<Entity> lstEnt, string promp, DelegateJig op)
        {
            JigDelegate jig = new JigDelegate();
            jig.lstEnt = lstEnt;
            jig.promp = promp;
            jig.op = op;
            PromptResult prJig = ed.Drag(jig);
            if (prJig.Status != PromptStatus.OK)
            {
                return false;
            }
            else
            {
                return true;
            }
        }
    }




    //本类是Jig，单独的实体或实体列表均可调用
    public class JigDelegate : DrawJig
    {
        private List<Entity> _lstEnt; //移动的实体
        private string _promp;   //提示
        private DelegateJig _op;//委拖

        private Point3d ptBase = new Point3d();//基点
        private Point3d ptTo;   //插入点


        /// <summary>
        /// 移动的实体
        /// </summary>
        public List<Entity> lstEnt
        {
            set { _lstEnt = value; }
        }

        /// <summary>
        /// /提示
        /// </summary>
        public string promp
        {
            set { _promp = value; }
        }

        /// <summary>
        /// /委托
        /// </summary>
        public DelegateJig op
        {
            set { _op = value; }
            get { return _op; }
        }



        protected override SamplerStatus Sampler(JigPrompts prompts)
        {
            JigPromptPointOptions optJigPoint = new JigPromptPointOptions(_promp);

            optJigPoint.UserInputControls =
                   UserInputControls.Accept3dCoordinates |
                   UserInputControls.NoZeroResponseAccepted |
                   UserInputControls.NoNegativeResponseAccepted |
                   UserInputControls.NullResponseAccepted;

            optJigPoint.Keywords.Add("Undo", "Undo", "放弃(U)");


            PromptPointResult resJigPoint = prompts.AcquirePoint(optJigPoint);
            Point3d curPt = resJigPoint.Value;
            ptBase = ptTo;
            if (ptTo != curPt)
            {
                ptTo = curPt;
                return SamplerStatus.OK;
            }
            else
            {
                return SamplerStatus.NoChange;
            }
        }


        protected override bool WorldDraw(WorldDraw draw)
        {
            try
            {
                foreach (Entity ent in _lstEnt)
                {
                    op(ent, ptBase, ptTo); //委托函数，返回去调用具体对每个实体所执行的操作

                    ent.RecordGraphicsModified(true);
                    draw.Geometry.Draw(ent);
                }
            }
            catch (System.Exception)
            {
                return false;
            }
            return true;
        }

    }
}