C#
// Place Text to center using calculated text width
// tested on A2010 .NET Framework 3.5
[CommandMethod("tcenter")]
public static void textToCenter()
{
Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
Database db = doc.Database;
Autodesk.AutoCAD.GraphicsInterface.TextStyle style = new Autodesk.AutoCAD.GraphicsInterface.TextStyle();
byte n;
Transaction tr = db.TransactionManager.StartTransaction();
try
{
using (tr)
{
BlockTableRecord btr = (BlockTableRecord)tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite);
// setup the text
string text = "1234567890";
// add new dbtext to current space
DBText txt = new DBText();
txt.SetDatabaseDefaults();
txt.TextString = text;
txt.Position = new Point3d(100, 200, 0);
btr.AppendEntity(txt);
tr.AddNewlyCreatedDBObject(txt, true);
// get textstyle of newly created text
TextStyleTableRecord txtbtr = (TextStyleTableRecord)tr.GetObject(txt.TextStyleId, OpenMode.ForRead);
// copy properties from TextStyleTableRecord and dbtext to temp AcGi.TextStyle (just very limited one for the future calculation)
style.FileName = txtbtr.FileName;
// then copy properties from existing text
style.TextSize = txt.Height; // txtbtr.TextSize;
style.ObliquingAngle = txt.Oblique;
style.XScale = txt.WidthFactor;
// load temp style record
try
{
n = style.LoadStyleRec;
}
catch { return; }// something wrong then exit on error
// set new position of text center, i.e. some dummy point
Point3d cpt = new Point3d(20, -45, 0);
// find out the extents
Point2d minpt, maxpt;
// get extends of text
Extents2d ex = style.ExtentsBox(text, true, true, null);
minpt = ex.MinPoint;
maxpt = ex.MaxPoint;
// work out the insertion point
Point3d newpos = cpt - new Vector3d((minpt.X + maxpt.X) / 2.0, (minpt.Y + maxpt.Y) / 2.0, 0);
// change text position to be centered in this point, independently of text alignment mode
txt.Position = newpos;
style.Dispose();// it's not a database resident, so dispose style, optional
tr.Commit();
}
}
catch (System.Exception exc)
{
Autodesk.AutoCAD.ApplicationServices.Application.ShowAlertDialog(exc.Message + "\n" + exc.StackTrace);
}
finally { }
}
VB.NET
' Place Text to center using calculated text width
' tested on A2010 .NET Framework 3.5
<CommandMethod("tcenter")> _
Public Shared Sub textToCenter()
Dim doc As Document = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument
Dim db As Database = doc.Database
Dim style As New Autodesk.AutoCAD.GraphicsInterface.TextStyle()
Dim n As Byte
Dim tr As Transaction = db.TransactionManager.StartTransaction()
Try
Using tr
Dim btr As BlockTableRecord = DirectCast(tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite), BlockTableRecord)
' setup the text
Dim text As String = "1234567890"
' add new dbtext to current space
Dim txt As New DBText()
txt.SetDatabaseDefaults()
txt.TextString = text
txt.Position = New Point3d(100, 200, 0)
btr.AppendEntity(txt)
tr.AddNewlyCreatedDBObject(txt, True)
' get textstyle of newly created text
Dim txtbtr As TextStyleTableRecord = DirectCast(tr.GetObject(txt.TextStyleId, OpenMode.ForRead), TextStyleTableRecord)
' copy properties from TextStyleTableRecord and dbtext to temp AcGi.TextStyle (just very limited one for the future calculation)
style.FileName = txtbtr.FileName
' then copy properties from existing text
style.TextSize = txt.Height
' txtbtr.TextSize;
style.ObliquingAngle = txt.Oblique
style.XScale = txt.WidthFactor
' load temp style record
Try
n = style.LoadStyleRec
Catch
Return
End Try
' something wrong then exit on error
' set new position of text center, i.e. some dummy point
Dim cpt As New Point3d(20, -45, 0)
' find out the extents
Dim minpt As Point2d, maxpt As Point2d
' get extends of text
Dim ex As Extents2d = style.ExtentsBox(text, True, True, Nothing)
minpt = ex.MinPoint
maxpt = ex.MaxPoint
' work out the insertion point
Dim newpos As Point3d = cpt - New Vector3d((minpt.X + maxpt.X) / 2.0, (minpt.Y + maxpt.Y) / 2.0, 0)
' change text position to be centered in this point, independently of text alignment mode
txt.Position = newpos
style.Dispose()
' it's not a database resident, so dispose style, optional
tr.Commit()
End Using
Catch exc As System.Exception
Autodesk.AutoCAD.ApplicationServices.Application.ShowAlertDialog(exc.Message & vbLf & exc.StackTrace)
Finally
End Try
End Sub
