单纯的1个或多个实体移动的Jig

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
{
    public class CADJig
    {
        /// <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, Point3d pt, string promp)
        {
            Jig jig = new Jig();
            jig.lstEnt = lstEnt;
            jig.ptBase = pt;
            jig.promp = promp;
            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 Jig : DrawJig
    {

        private List<Entity> _lstEnt; //移动的实体
        private Point3d _ptBase;   //基点
        private string _promp;   //提示


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

        /// <summary>
        /// 基点
        /// </summary>
        public Point3d ptBase
        {
            set { _ptBase = value; }
            get { return _ptBase; }
        }


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




        private Point3d ptTo;   //插入点

        protected override SamplerStatus Sampler(JigPrompts prompts)
        {
            JigPromptPointOptions optJigPoint = new JigPromptPointOptions(_promp);
            //optJigPoint.Cursor = CursorType.RubberBand;

            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;
            if (ptTo != curPt)
            {
                ptTo = curPt;
                return SamplerStatus.OK;
            }
            else
            {
                ptBase = ptTo;
                return SamplerStatus.NoChange;
            }
        }


        protected override bool WorldDraw(WorldDraw draw)
        {
            try
            {
                Matrix3d mat = Matrix3d.Displacement(ptTo - ptBase);
                foreach (Entity ent in _lstEnt)
                {
                    //移动每个实体
                    ent.TransformBy(mat);
                    ent.RecordGraphicsModified(true);
                    draw.Geometry.Draw(ent);
                }
            }
            catch (System.Exception)
            {
                return false;
            }
            return true;
        }


    }
}