Width of DBText

[youssefGC]

Hello everyone,

Normally the width of the text depends on the number of characters, I need a method to know the width of a DBText in my drawing, is it possible to do this by programming?

using (DBText Txt = new DBText())
            {
                // ......

                Txt.TextString = "I need to read the width of this text";

                // ......
            }

Thank you.

[_gile]

Hi,

You can P/Invoke acedTextBox as shown in the DBTextExtension class (GetTextBoxCorners method) from Gile.AutoCAD.Extension library.

[daniel_cadext]

AcDbText::getBoundingPoints isn’t in .NET?

you may be able to put the contents in an MText, then

call AcDbMText::getBoundingPoints

[youssefGC · Accepted solution]

I use "Extents Box" to calculate the dimensions width height of the text :

public double GetLengthOfText(DBText txt, ObjectId IdOfStyle)
        {
            double width = 0.0, height = 0.0;
            Autodesk.AutoCAD.GraphicsInterface.TextStyle iStyle = new Autodesk.AutoCAD.GraphicsInterface.TextStyle();
            iStyle.FromTextStyleTableRecord(IdOfStyle);
            Extents2d extents = iStyle.ExtentsBox(txt.TextString, true, true, null);
            width = extents.MaxPoint.X - extents.MinPoint.X;
            height = extents.MaxPoint.Y - extents.MinPoint.Y;

            return width * (txt.Height / height);  
        }

[kerry_w_brown]

I use a variation of this :

https://www.theswamp.org/index.php?topic=50493.msg556106#msg556106

Handy for determining the space text will occupy, without necessarily having the Text object.

Regards,

[daniel_cadext]

That’s pretty slick, you could use that to pre calculate table column widths

[kerry_w_brown]

---

@daniel_cadext wrote:

That’s pretty slick, you could use that to pre calculate table column widths

---

Exactly !

Also handy when auto-choosing an Item_Balloon which is a suitable length to use for component 'numbers' 

 

[youssefGC]

Thank you, but in my case I have to pass a DbText in the argument to take into consideration the change in text height in my main code.

[kerry_w_brown]

@youssefGC 

That's fine, but not obvious from your original question.

Regards,