Adjust attribute text width

ditran7577 — Tue, 25 Jun 2013 07:32:13 GMT

Hi All,

Is there any way to adjust width of attribute text so that it is not out of contained block. The attribute is set at left alignment and width factor <=1. Please see picture below:

Thanks so much.

Re: Adjust attribute text width

norman.yuan — Tue, 25 Jun 2013 21:24:49 GMT

You need to find out the attribte text's width, and then you need to find out the allowed/desired width. Once you get these 2 widths, you can calculate the WidthFactor of AttributeReference.

I put together some quick code that does it:

using System;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.Runtime;

[assembly: CommandClass(typeof(AttributeWidthFactor.MyCommands))]

namespace AttributeWidthFactor
{
    public class MyCommands
    {
        [CommandMethod("AttWidth")]
        public static void SetAttrWidthFactor()
        {
            Document dwg = Application.DocumentManager.MdiActiveDocument;
            Editor ed = dwg.Editor;

            //Pick an attributereference in a block
            PromptNestedEntityOptions opt = new 
                PromptNestedEntityOptions("\nPick an attribute:");
            PromptNestedEntityResult res = ed.GetNestedEntity(opt);

            if (res.Status == PromptStatus.OK)
            {
                if (res.ObjectId.ObjectClass.DxfName.ToUpper() == "ATTRIB")
                {
                    //Ask user to pick a distance as desired width for 
                    //the attribute to fit in. Based on the block, the width 
                    //could be a known value
                    PromptPointOptions popt = new 
                        PromptPointOptions("\nPick width base point:");
                    PromptPointResult pres = ed.GetPoint(popt);
                    if (pres.Status != PromptStatus.OK) return;
                    Point3d basePt = pres.Value;

                    PromptDistanceOptions dopt = 
                        new PromptDistanceOptions("\nPick width: ");
                    dopt.UseBasePoint = true;
                    dopt.BasePoint = basePt;

                    PromptDoubleResult dres = ed.GetDistance(dopt);
                    if (dres.Status != PromptStatus.OK) return;

                    //This is the width we want to fit the attribute text's width
                    double w = dres.Value;

                    using (Transaction tran = 
                        dwg.TransactionManager.StartTransaction())
                    {
                        AttributeReference att = (AttributeReference)tran.GetObject(
                            res.ObjectId, OpenMode.ForWrite);

                        //Get attribute's width, assuming it is placed horizontally
                        double aw = Math.Abs(att.GeometricExtents.MaxPoint.X 
                            - att.GeometricExtents.MinPoint.X);

                        //This is the WidthFactor
                        double factor = w / aw;
                        att.WidthFactor = factor;

                        tran.Commit();
                    }
                }
                else
                {
                    Application.ShowAlertDialog("Not an attribute!");
                }
            }
        }
    }
}

The code will stretch or narrow the attribute to fit it into a given width.

HTH

Re: Adjust attribute text width

ditran7577 — Thu, 27 Jun 2013 01:08:26 GMT

Thanks a lot. It's OK.

topic Adjust attribute text width in .NET Forum

Adjust attribute text width

Re: Adjust attribute text width

Re: Adjust attribute text width