topic Re: Refresh drawing after block modivication in .NET Forum

Refresh drawing after block modivication

Anonymous — Tue, 26 Nov 2013 16:41:24 GMT

Dear all!

My code mirrors a selection by either the x-axis or the y-axis.

It is working fine.

Exept, the drawing shows the result, when I move my cursor to the active dwg.

How can I refresh my drawing, direct after modification of a block?

Any sugestions to a clean solution?

Thank you!

I use the code below to mirror a selected block by a button on a docking pallette:

private void btn_Vertical_Mirror_Click(object sender, EventArgs e)
{
	(new Modifikation()).Mirror("v");
}

the code, which is called is:

public void Mirror(String axis = "")
{
	//---------------------------------------------------------------------------------------------------------------------------------------
	Document dwg = Application.DocumentManager.MdiActiveDocument;
	Database db = dwg.Database;
	Editor edt = dwg.Editor;
	//---------------------------------------------------------------------------------------------------------------------------------------
	try
	{
		Autodesk.AutoCAD.Internal.Utils.SetFocusToDwgView();
		PromptSelectionResult sel = edt.SelectImplied();
		//-----------------------------------------------------------------------------------------------------------------------------------
		if (sel.Status == PromptStatus.Error)
		{
			//Selection filter
			TypedValue[] tv = new TypedValue[] { new TypedValue( (int)DxfCode.Start, "INSERT") };
			SelectionFilter sf = new SelectionFilter(tv);
			PromptSelectionOptions pso = new PromptSelectionOptions();

			pso.MessageForAdding = "\nSelect block";
			sel = edt.GetSelection(pso, sf);

			if (sel.Status != PromptStatus.OK)//
			{
				edt.WriteMessage("\n#ERROR! Selection failed\n");
				return;
			}//if
		}
		//-----------------------------------------------------------------------------------------------------------------------------------
		while (axis == "")
		{
			axis = edt.GetString("Axis ('H'orizontaly oder 'V'erticaly)").StringResult.ToUpper();
			if (axis.StartsWith("H")) { axis = "h"; }
			else if (axis.StartsWith("V")) { axis = "v"; }
			else { axis = ""; }
		}
		//-----------------------------------------------------------------------------------------------------------------------------------
		using (Transaction tr = db.TransactionManager.StartTransaction())
		{
			using (DocumentLock lk = dwg.LockDocument())
			{
				for (int i = 0; i < sel.Value.Count; i++)
				{
					if (sel.Value[i].ObjectId.ObjectClass.IsDerivedFrom(RXObject.GetClass(typeof(BlockReference))))// Blöcke werden der Auswahl entnommen
					{
						BlockReference blk_ref = (BlockReference)tr.GetObject(sel.Value[i].ObjectId, OpenMode.ForWrite);

						//-------------------------------------------------------------------------------------------------------------------
						if (axis == "h")
						{
							Matrix3d spgl = Matrix3d.Mirroring(
								new Line3d(
									blk_ref.Position,
									new Point3d(
										blk_ref.Position.X + 1,
										blk_ref.Position.Y, 0)));
							blk_ref.TransformBy(spgl);
						}
						//-------------------------------------------------------------------------------------------------------------------
						else if (axis == "v")
						{
							Matrix3d spgl = Matrix3d.Mirroring(
								new Line3d(
									blk_ref.Position,
									new Point3d(
										blk_ref.Position.X,
										blk_ref.Position.Y + 1, 0)));
							blk_ref.TransformBy(spgl);
						}
						//-------------------------------------------------------------------------------------------------------------------
					}//if
				}// for
			}// using DocumentLock
			tr.Commit();
		}// using Transaction
		edt.WriteMessage("\nOkay\n");
	}// try
	//---------------------------------------------------------------------------------------------------------------------------------------
	catch { edt.WriteMessage("\n#Error!\n"); }
	//---------------------------------------------------------------------------------------------------------------------------------------
	finally { edt.WriteMessage("\nDone\n"); }
}// public void

Re: Refresh drawing after block modivication

Ajilal.Vijayan — Tue, 26 Nov 2013 17:36:53 GMT

try by adding this line at the end of your code

'' Regenerate the drawing
edt.Regen()

http://docs.autodesk.com/ACD/2010/ENU/AutoCAD%20.NET%20Developer%27s%20Guide/files/WS1a9193826455f5ff2566ffd511ff6f8c7ca-42db.htm

Re: Refresh drawing after block modivication

Anonymous — Tue, 26 Nov 2013 17:56:10 GMT

Hallo and thank you for your fast and competent reply!

Thank's, once more!

Re: Refresh drawing after block modivication

StephenPreston — Tue, 26 Nov 2013 22:02:11 GMT

Calling Regen can be a tad slow for a large drawing. When I've modified a BlockTableRecord, I prefer to iterate through all the BlockReferences for that BlockTableRecord and call RecordGraphicsModified(0 on each one. Something like this:

http://adndevblog.typepad.com/autocad/2012/05/redefining-a-block.html

Its personal choice really - just mentioning this for others who may find this post in the future.

Re: Refresh drawing after block modivication

Anonymous — Wed, 27 Nov 2013 18:49:58 GMT

Hi Stephen!

Some kind of loop was also my first idea.

I tryed to refresh my drawing by using the code below.

It's a function, which is called after closing the transaction.

private void RefreshBlocks()
{
  //-------------------------
  Document dwg = Application.DocumentManager.MdiActiveDocument;
  Database db = dwg.Database;
  Editor edt = dwg.Editor;
  //-------------------------
  Autodesk.AutoCAD.Internal.Utils.SetFocusToDwgView();
  PromptSelectionResult sel = edt.SelectImplied();
  if (sel.Status == PromptStatus.Error) { sel = edt.SelectAll(); }
  //-------------------------
  try
  {
    using (Transaction tr = db.TransactionManager.StartTransaction())
    {
      using (DocumentLock lk = dwg.LockDocument())
      {
        for (int i = 0; i < sel.Value.Count; i++)// Loop objects
        {
          if (sel.Value[i].ObjectId.ObjectClass.IsDerivedFrom(RXObject.GetClass(typeof(BlockReference))))// proceed only blocks
          {
            BlockReference blk_ref = (BlockReference)tr.GetObject(sel.Value[i].ObjectId, OpenMode.ForWrite);
            blk_ref.RecordGraphicsModified(true);
          }// if
        }// for
      }// using DocumentLock 
      tr.Commit();
    }// using Transaction 
  }// try
  //-------------------------
  catch { }
  //-------------------------
}

But something is wrong. The changes on the block are not shown, until i set the focus to the drawing.

By calling < regen > everything goes well.

Can you point your finger to the mistake or error of the code?

Thank you!

Re: Refresh drawing after block modivication

_gile — Wed, 27 Nov 2013 20:26:34 GMT

Hi,

You can try adding:

db.TransactionManager.QueueForGraphicsFlush();

after each:

blk_ref.TransformBy(spgl);

Re: Refresh drawing after block modivication

Anonymous — Thu, 28 Nov 2013 09:11:08 GMT

After playing around I finaly have a (partial) solution.

I insered the following rows to my code:

using (Transaction tr = db.TransactionManager.StartTransaction())
{
  using (DocumentLock lk = dwg.LockDocument())
  {
    dwg.TransactionManager.EnableGraphicsFlush(true);// new
	
	// Code for modification of the block(s)
	
    db.TransactionManager.QueueForGraphicsFlush();// new
    dwg.TransactionManager.FlushGraphics();// new
  }// using DocumentLock
  tr.Commit();
}// using Transaction

BUT!! It showes some strainge behaviour:

Rotating of blocks is working fine.

Mirroring of blocks is only working, by selecting the blocks by a < edt.GetSelection(pso, sf) > command.

Using < edt.SelectImplied(); >, the updating of the drawing fails (must be triggered by activating by the operator)

I can overcome this, by using the code below.

But it looks not nice to me.

PromptSelectionResult sel = edt.SelectImplied();
if (sel.Status == PromptStatus.OK)
{
  ObjectId[] sel_tmp = new ObjectId[sel.Value.Count];
  for (int i = 0; i < sel.Value.Count; i++) temp_sel[i] = sel.Value[i].ObjectId;
  edt.SetImpliedSelection(new ObjectId[0]);
  edt.SetImpliedSelection(sel_tmp);
}// if