topic Re: Width of DBText in .NET Forum

Width of DBText

youssefGC — Thu, 27 Jun 2024 10:09:54 GMT

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.

Re: Width of DBText

_gile — Thu, 27 Jun 2024 11:17:11 GMT

Hi,

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

Re: Width of DBText

daniel_cadext — Thu, 27 Jun 2024 14:10:41 GMT

AcDbText::getBoundingPoints isn’t in .NET?

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

call AcDbMText::getBoundingPoints

Re: Width of DBText

youssefGC — Fri, 28 Jun 2024 13:58:37 GMT

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); }

Re: Width of DBText

kerry_w_brown — Fri, 28 Jun 2024 20:08:25 GMT

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,

Re: Width of DBText

daniel_cadext — Fri, 28 Jun 2024 22:55:09 GMT

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

Re: Width of DBText

kerry_w_brown — Fri, 28 Jun 2024 23:51:55 GMT

@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'

Re: Width of DBText

youssefGC — Sat, 29 Jun 2024 10:23:33 GMT

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.

Re: Width of DBText

kerry_w_brown — Sat, 29 Jun 2024 21:46:40 GMT

@youssefGC

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

Regards,