How to show a block when positioning it, using C#?

eachy

2. using Autodesk.AutoCAD.Geometry;
   
3. using Autodesk.AutoCAD.DatabaseServices;
   
4. using Autodesk.AutoCAD.ApplicationServices;
   
5. using Autodesk.AutoCAD.EditorInput;
   
6. using Autodesk.AutoCAD.Runtime;
   
7. 
   
8. namespace MySamples
   
9. {
   
10.   public class BlockJigCmds
    
11.   {
    
12.     // Ask the user to place the block named "TEST", showing it
    
13.     //   during the dragging.
    
14.     // Make sure that a block with this name exists in the drawing.
    
15.     //===============================================================
    
16.     [CommandMethod("BlockJig")]
    
17.     static public void BlockJig()
    
18.     {
    
19.       Editor ed =
    
20.               Application.DocumentManager.MdiActiveDocument.Editor;
    
21.       Database db = ed.Document.Database;
    
22.       try
    
23.       {
    
24.         using (Transaction tr =
    
25.                            db.TransactionManager.StartTransaction())
    
26.         {
    
27.           // Find the "TEST" block in the current drawing
    
28.           BlockTable bt = (BlockTable)tr.GetObject(db.BlockTableId,
    
29.                                                    OpenMode.ForRead);
    
30.           BlockTableRecord block = (BlockTableRecord)tr.GetObject(
    
31.                                        bt["TEST"], OpenMode.ForRead);
    
32.           // Create the Jig and ask the user to place the block
    
33.           //----------------------------------------------------
    
34.           MyBlockJig blockJig = new MyBlockJig();
    
35.           Point3d point;
    
36.           PromptResult res = blockJig.DragMe( block.ObjectId,
    
37.                                               out point);
    
38.           if (res.Status == PromptStatus.OK)
    
39.           {
    
40.             // Now we need to do the usual steps to place
    
41.             //   the block insert at the position where the user
    
42.             //   did the click
    
43.             BlockTableRecord curSpace =
    
44.               (BlockTableRecord)tr.GetObject(
    
45.                                db.CurrentSpaceId, OpenMode.ForWrite);
    
46.             BlockReference insert = new BlockReference(point,
    
47.                                                      block.ObjectId);
    
48.             curSpace.AppendEntity(insert);
    
49.             tr.AddNewlyCreatedDBObject(insert, true);
    
50.           }
    
51.           tr.Commit();
    
52.         } // using
    
53.       }
    
54.       catch (System.Exception ex)
    
55.       {
    
56.         ed.WriteMessage(ex.ToString());
    
57.       }
    
58.     } // BlockJig()
    
59.   } // class BlockJigCmds
    
60.   // This Jig will show the given block during the dragging.
    
61.   //=================================================================
    
62.   public class MyBlockJig : DrawJig
    
63.   {
    
64.     public Point3d _point;
    
65.     private ObjectId _blockId = ObjectId.Null;
    
66.     // Shows the block until the user clicks a point.
    
67.     // The 1st parameter is the Id of the block definition.
    
68.     // The 2nd is the clicked point.
    
69.     //---------------------------------------------------------------
    
70.     public PromptResult DragMe(ObjectId i_blockId, out Point3d o_pnt)
    
71.     {
    
72.       _blockId = i_blockId;
    
73.       Editor ed =
    
74.               Application.DocumentManager.MdiActiveDocument.Editor;
    
75.       PromptResult jigRes = ed.Drag(this);
    
76.       o_pnt = _point;
    
77.       return jigRes;
    
78.     }
    
79.     // Need to override this method.
    
80.     // Updating the current position of the block.
    
81.     //--------------------------------------------------------------
    
82.     protected override SamplerStatus Sampler(JigPrompts prompts)
    
83.     {
    
84.       JigPromptPointOptions jigOpts = new JigPromptPointOptions();
    
85.       jigOpts.UserInputControls =
    
86.                           (UserInputControls.Accept3dCoordinates |
    
87.                            UserInputControls.NullResponseAccepted);
    
88.       jigOpts.Message = "Select a point:";
    
89.       PromptPointResult jigRes = prompts.AcquirePoint(jigOpts);
    
90.       Point3d pt = jigRes.Value;
    
91.       if (pt == _point)
    
92.         return SamplerStatus.NoChange;
    
93.       _point = pt;
    
94.       if (jigRes.Status == PromptStatus.OK)
    
95.         return SamplerStatus.OK;
    
96.       return SamplerStatus.Cancel;
    
97.     }
    
98.     // Need to override this method.
    
99.     // We are showing our block in its current position here.
    
100.     //--------------------------------------------------------------
     
101.     protected override bool WorldDraw(
     
102.                   Autodesk.AutoCAD.GraphicsInterface.WorldDraw draw)
     
103.     {
     
104.       BlockReference inMemoryBlockInsert =
     
105.                                new BlockReference(_point, _blockId);
     
106.       draw.Geometry.Draw(inMemoryBlockInsert);
     
107.       inMemoryBlockInsert.Dispose();
     
108.       return true;
     
109.     } // WorldDraw()
     
110.   } // class BlockJig
     
111. } // namespace MySamples

using Autodesk.AutoCAD.Geometry;<br /> using Autodesk.AutoCAD.DatabaseServices;<br /> using Autodesk.AutoCAD.ApplicationServices;<br /> using Autodesk.AutoCAD.EditorInput;<br /> using Autodesk.AutoCAD.Runtime; <br /> <br /> namespace MySamples<br /> {<br />   public class BlockJigCmds<br />   {<br />     // Ask the user to place the block named "TEST", showing it <br />     //   during the dragging.<br />     // Make sure that a block with this name exists in the drawing.<br />     //===============================================================<br />     [CommandMethod("BlockJig")]<br />     static public void BlockJig()<br />     {<br />       Editor ed =<br />               Application.DocumentManager.MdiActiveDocument.Editor;<br />       Database db = ed.Document.Database;<br />       try<br />       {<br />         using (Transaction tr =<br />                            db.TransactionManager.StartTransaction())<br />         {<br />           // Find the "TEST" block in the current drawing<br />           BlockTable bt = (BlockTable)tr.GetObject(db.BlockTableId,<br />                                                    OpenMode.ForRead);<br />           BlockTableRecord block = (BlockTableRecord)tr.GetObject(<br />                                        bt["TEST"], OpenMode.ForRead);<br />           // Create the Jig and ask the user to place the block<br />           //----------------------------------------------------<br />           MyBlockJig blockJig = new MyBlockJig();<br />           Point3d point;<br />           PromptResult res = blockJig.DragMe( block.ObjectId, <br />                                               out point);<br />           if (res.Status == PromptStatus.OK)<br />           {<br />             // Now we need to do the usual steps to place<br />             //   the block insert at the position where the user <br />             //   did the click<br />             BlockTableRecord curSpace = <br />               (BlockTableRecord)tr.GetObject(<br />                                db.CurrentSpaceId, OpenMode.ForWrite);<br />             BlockReference insert = new BlockReference(point,<br />                                                      block.ObjectId);<br />             curSpace.AppendEntity(insert);<br />             tr.AddNewlyCreatedDBObject(insert, true);<br />           }<br />           tr.Commit();<br />         } // using<br />       }<br />       catch (System.Exception ex)<br />       {<br />         ed.WriteMessage(ex.ToString());<br />       }<br />     } // BlockJig()<br />   } // class BlockJigCmds<br />   // This Jig will show the given block during the dragging.<br />   //=================================================================<br />   public class MyBlockJig : DrawJig<br />   {<br />     public Point3d _point;<br />     private ObjectId _blockId = ObjectId.Null;<br />     // Shows the block until the user clicks a point.<br />     // The 1st parameter is the Id of the block definition.<br />     // The 2nd is the clicked point.<br />     //---------------------------------------------------------------<br />     public PromptResult DragMe(ObjectId i_blockId, out Point3d o_pnt)<br />     {<br />       _blockId = i_blockId;<br />       Editor ed = <br />               Application.DocumentManager.MdiActiveDocument.Editor;<br />       PromptResult jigRes = ed.Drag(this);<br />       o_pnt = _point;<br />       return jigRes;<br />     }<br />     // Need to override this method.<br />     // Updating the current position of the block.<br />     //--------------------------------------------------------------<br />     protected override SamplerStatus Sampler(JigPrompts prompts)<br />     {<br />       JigPromptPointOptions jigOpts = new JigPromptPointOptions();<br />       jigOpts.UserInputControls = <br />                           (UserInputControls.Accept3dCoordinates | <br />                            UserInputControls.NullResponseAccepted);<br />       jigOpts.Message = "Select a point:";<br />       PromptPointResult jigRes = prompts.AcquirePoint(jigOpts);<br />       Point3d pt = jigRes.Value;<br />       if (pt == _point)<br />         return SamplerStatus.NoChange;<br />       _point = pt;<br />       if (jigRes.Status == PromptStatus.OK)<br />         return SamplerStatus.OK;<br />       return SamplerStatus.Cancel;<br />     }<br />     // Need to override this method.<br />     // We are showing our block in its current position here.<br />     //--------------------------------------------------------------<br />     protected override bool WorldDraw(<br />                   Autodesk.AutoCAD.GraphicsInterface.WorldDraw draw)<br />     {<br />       BlockReference inMemoryBlockInsert = <br />                                new BlockReference(_point, _blockId);<br />       draw.Geometry.Draw(inMemoryBlockInsert);<br />       inMemoryBlockInsert.Dispose();<br />       return true;<br />     } // WorldDraw()<br />   } // class BlockJig<br /> } // namespace MySamples

ScmTools

支持，很好的JIG例子

qianzj

如果播入块的同时  可以动态镜像或旋转  如何在此基础上改进？