AutoCAD.Net——浅谈JIG之EntityJig和DrawJig

嘎子 AutoCAD二次开发, 转载 2016-02-26  2,313 次浏览 .Net, AutoCAD.Net, Jig, 即时绘图 2条评论

转载自：http://www.cnblogs.com/wangyong/archive/2010/01/20/1652412.html，根据自己的理解加了注释及其他的一些东西。

在CAD的二次开发中，有时会使用JIG技术来实现操作的动态性、交互，最常见的比如说是在CAD中定制自己的移动和复制，当然要保持CAD中原有的动态显示效果。

在JIG中我们可以继承EntityJig和DrawJig,对于这两个类，那这两个类有什么区别呢？他们的使用场合又有什么区别呢？

其实，他们之间在操作一些简单的实体的时候是没有多大区别的，硬要说区别的话，那就是在实现一个相同功能时DrawJig比EntityJig的代码简单一些。（注意：是指在操作简单的实体的时候，比如实体的数量就一个）。

EntityJig:一般用于图元实体的拖动，要求先生成实体Entity

 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;protected override bool Update()
        {
            throw new NotImplementedException();
        }

        protected override SamplerStatus Sampler(JigPrompts prompts)
        {
            throw new NotImplementedException();
        }

       protected override bool Update()

{

throw new NotImplementedException();

}

protected override SamplerStatus Sampler(JigPrompts prompts)

{

throw new NotImplementedException();

}

DrawJig:一般用于复杂图形的拖动

<p>
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;protected override bool WorldDraw(Autodesk.AutoCAD.GraphicsInterface.WorldDraw draw)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; throw new NotImplementedException();
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }
</p>

<p>
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; protected override SamplerStatus Sampler(JigPrompts prompts)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; throw new NotImplementedException();
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }
</p>

        protected override bool WorldDraw(Autodesk.AutoCAD.GraphicsInterface.WorldDraw draw)

        {

            throw new NotImplementedException();

        }

        protected override SamplerStatus Sampler(JigPrompts prompts)

        {

            throw new NotImplementedException();

        }

在拖动一个实体的时候，不管是用EntityJig还是DrawJig效果都一样，但是当我们在处理多个实体的移动，我们要求鼠标可以实时动态显示要拖动的多个实体，这点，EntityJig却无法实现了，但如果是DrawJig却很容易实现。（下图是用DrawJig实现）

而且对于动态生成实体（比如指定一个圆心，动态生成一个圆），用DrawJig中的WorlDraw可以灵活控制实现生成。

相比之下，是不是发现DrawJig优胜于EntityJig（个人理解）.

下面贴出上图实现的代码：

<p>
	&nbsp;&nbsp;&nbsp;&nbsp;#region DrawJig动态拖动多个实体
&nbsp; &nbsp; public class DrawJigEnt : DrawJig
&nbsp; &nbsp; {
&nbsp; &nbsp; &nbsp; &nbsp; //变量
&nbsp; &nbsp; &nbsp; &nbsp; Point3d oldPt;//实体移动之前的位置
&nbsp; &nbsp; &nbsp; &nbsp; Point3d newPt;//实体移动之后的位置
&nbsp; &nbsp; &nbsp; &nbsp; Vector3d v;//实体移动的向量

&nbsp; &nbsp; &nbsp; &nbsp; List&lt;Entity&gt; ents = new List&lt;Entity&gt;();
&nbsp; &nbsp; &nbsp; &nbsp; List&lt;Point3d&gt; oldPts = new List&lt;Point3d&gt;();
&nbsp; &nbsp; &nbsp; &nbsp; public DrawJigEnt(List&lt;Entity&gt; ents)
&nbsp; &nbsp; &nbsp; &nbsp; {
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; oldPt = Point3d.Origin;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; newPt = Point3d.Origin;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; v = new Vector3d();
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; this.ents = ents;

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Autodesk.AutoCAD.DatabaseServices.Entity ent = ents[0];
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (ent is BlockReference)
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; BlockReference br = ent as BlockReference;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; oldPt = br.Position;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; for (int i = 1; i &lt; ents.Count; i++)
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (ents[i] is BlockReference)
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; BlockReference br = ents[i] as BlockReference;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; oldPts.Add(br.Position);
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }
&nbsp; &nbsp; &nbsp; &nbsp; }

&nbsp; &nbsp; &nbsp; &nbsp; //更新
&nbsp; &nbsp; &nbsp; &nbsp; protected override bool WorldDraw(Autodesk.AutoCAD.GraphicsInterface.WorldDraw draw)
&nbsp; &nbsp; &nbsp; &nbsp; {
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Entity ent = ents[0];
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ent.UpgradeOpen();
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (ent is BlockReference)
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; BlockReference br = ent as BlockReference;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; br.Position = newPt;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; draw.Geometry.Draw(br);
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; v = newPt.GetVectorTo(oldPt);&nbsp;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; for(int i =1;i&lt;ents.Count;i++)
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Entity entity = ents[i];
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; entity.UpgradeOpen();
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (entity is BlockReference)
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; BlockReference br = entity as BlockReference;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; br.Position = oldPts[i - 1] + v;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; draw.Geometry.Draw(entity);
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; return true;
&nbsp; &nbsp; &nbsp; &nbsp; }
&nbsp; &nbsp; &nbsp; &nbsp; //取样函数
&nbsp; &nbsp; &nbsp; &nbsp; protected override SamplerStatus Sampler(JigPrompts prompts)
&nbsp; &nbsp; &nbsp; &nbsp; {
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; JigPromptOptions opt = new JigPromptOptions();
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; opt.UserInputControls = UserInputControls.Accept3dCoordinates | UserInputControls.NoNegativeResponseAccepted | UserInputControls.NullResponseAccepted;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; opt.UseBasePoint = true;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; opt.Cursor = CursorType.RubberBand;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; opt.BasePoint = oldPt;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; opt.Message = "选择移动到的终点";

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; PromptPointResult res = prompts.AcquirePoint(opt);
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (PromptStatus.OK == res.Status)
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (res.Value == newPt)
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; return SamplerStatus.NoChange;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; newPt = res.Value;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; else
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; return SamplerStatus.Cancel;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; return SamplerStatus.OK;
&nbsp; &nbsp; &nbsp; &nbsp; }
&nbsp; &nbsp; }
&nbsp; &nbsp; #endregion<span style="font-family:'sans serif', tahoma, verdana, helvetica;font-size:12px;line-height:1.5;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>
</p>

    #region DrawJig动态拖动多个实体

    public class DrawJigEnt : DrawJig

    {

        //变量

        Point3d oldPt;//实体移动之前的位置

        Point3d newPt;//实体移动之后的位置

        Vector3d v;//实体移动的向量

List<Entity> ents = new List<Entity>();

List<Point3d> oldPts = new List<Point3d>();

public DrawJigEnt(List<Entity> ents)

        {

            oldPt = Point3d.Origin;

            newPt = Point3d.Origin;

            v = new Vector3d();

            this.ents = ents;

            Autodesk.AutoCAD.DatabaseServices.Entity ent = ents[0];

            if (ent is BlockReference)

            {

                BlockReference br = ent as BlockReference;

                oldPt = br.Position;

            }

for (int i = 1; i < ents.Count; i++)

            {

                if (ents[i] is BlockReference)

                {

                    BlockReference br = ents[i] as BlockReference;

                    oldPts.Add(br.Position);

                }

        //更新

        protected override bool WorldDraw(Autodesk.AutoCAD.GraphicsInterface.WorldDraw draw)

        {

            Entity ent = ents[0];

            ent.UpgradeOpen();

            if (ent is BlockReference)

            {

                BlockReference br = ent as BlockReference;

                br.Position = newPt;

                draw.Geometry.Draw(br);

            }

            v = newPt.GetVectorTo(oldPt); 

for(int i =1;i<ents.Count;i++)

            {

                Entity entity = ents[i];

                entity.UpgradeOpen();

                if (entity is BlockReference)

                {

                    BlockReference br = entity as BlockReference;

                    br.Position = oldPts[i - 1] + v;

                    draw.Geometry.Draw(entity);

                }

            return true;

        }

        //取样函数

        protected override SamplerStatus Sampler(JigPrompts prompts)

        {

            JigPromptOptions opt = new JigPromptOptions();

            opt.UserInputControls = UserInputControls.Accept3dCoordinates | UserInputControls.NoNegativeResponseAccepted | UserInputControls.NullResponseAccepted;

            opt.UseBasePoint = true;

            opt.Cursor = CursorType.RubberBand;

            opt.BasePoint = oldPt;

            opt.Message = "选择移动到的终点";

            PromptPointResult res = prompts.AcquirePoint(opt);

            if (PromptStatus.OK == res.Status)

            {

                if (res.Value == newPt)

                {

                    return SamplerStatus.NoChange;

                }

                newPt = res.Value;

            }

            else

            {

                return SamplerStatus.Cancel;

            }

            return SamplerStatus.OK;

        }

#endregion

原创文章，文章首发于：Riley Ge (@rileyge) — Steemit

原创文章，转载请注明： 转载自TsonTec:测量解决方案提供者

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