Using some slightly modified code from the samples provided by Autodesk as shown below I'm attempting to draw a simple leader with MText annotation.
In the attached bitmap the top leader shows the result of running the code and the bottom one the appearance I want which is obtained by changing the AutoCAD properties of the leader under
Text pos vert
from 'Above' to 'Centered'
I can't identify anything in the API which allows me to draw with this change, but feel it should be there, so help is needed.
Searching the web for code to draw leaders, basically only returns minor variations on this code with only the same functionality.
<CommandMethod("TDD")> _ Public Sub TestDrawLeader() DrawLeader("Here it is", New Point3d(0, 0, 0), New Point3d(15, 5, 0)) End Sub ' AddLeaderAnnotation ''' <summary> ''' Called from: AddLeaderAnnotation ''' </summary> ''' <returns></returns> ''' <remarks></remarks> Function DrawLeader(ByVal spText As String, ByVal pPtStart As Point3d, ByVal pPtEnd As Point3d) As Boolean Dim acDoc As Document = Autodesk.AutoCAD.ApplicationServices.Application.D
ocumentManager.MdiActiveDocument Dim acCurDb As Database = acDoc.Database Dim acBlkTbl As BlockTable Dim acBlkTblRec As BlockTableRecord Try ' Start a transaction Using acTrans As Transaction = acCurDb.TransactionManager.StartTransaction() ' Open the Block table for read acBlkTbl = acTrans.GetObject(acCurDb.BlockTableId, OpenMode.ForRead) ' Open the Block table record Model space for write acBlkTblRec = acTrans.GetObject(acBlkTbl(BlockTableRecord.ModelS pace), OpenMode.ForWrite) ' Create the MText annotation Dim acMText As MText = New MText() acMText.SetDatabaseDefaults() acMText.Contents = spText acMText.Location = New Point3d(pPtEnd.X + 7, pPtEnd.Y, 0) acMText.Attachment = AttachmentPoint.MiddleLeft acMText.Width = 0 ' Add the new object to Model space and the transaction acBlkTblRec.AppendEntity(acMText) acTrans.AddNewlyCreatedDBObject(acMText, True) ' Create the leader with annotation Dim acLdr As Leader = New Leader acLdr.SetDatabaseDefaults() acLdr.AppendVertex(pPtStart) acLdr.AppendVertex(pPtEnd) acLdr.AppendVertex(New Point3d(pPtEnd.X + 5, pPtEnd.Y, 0)) acLdr.HasArrowHead = True ' Add the new object to Model space and the transaction acBlkTblRec.AppendEntity(acLdr) acTrans.AddNewlyCreatedDBObject(acLdr, True) ' Attach the annotation after the leader object is added acLdr.Annotation = acMText.ObjectId acLdr.EvaluateLeader() ' Commit the changes and dispose of the transaction acTrans.Commit() End Using Return True Catch ex As SystemException MsgBox("Unable to with Function 'DrawLeader' due to:" & vbCrLf & Err.Description) Return False Finally End Try End Function ' DrawLeader
Solved! Go to Solution.
The DIMTAD property controls the position of the Mtext, it is initially set to the CUrrent Dimstyle's value. Override it for the leader to ensure it acts how you want.
acLdr.Annotation = acMText.ObjectId acLdr.Dimtad = 0 acLdr.EvaluateLeader()
Thanks. I'm only left with adding tables and creating the random drawing tools to get back to where the VBA code was 2 years ago.
Shouldn't play so much golf I guess.
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