Text Alignment Issue

[ChandrasekarML]

"While changing the text value, OLDSTRING = 'TITLE1' and NEWSTRING = 'HELLO WORLD', we are experiencing an issue where the alignment point of the old data is assigned after the changes. The geometric text alignment point is not updated according to the new string's insertion point."

Please find the below sample code, and we are facing difficulties finding the alignment calculation for different font styles.

public static float MeasureTextWidth(string text, string fontName, float fontSize, float widthFactor)
{
// Create a System.Drawing.Font object based on the given font and size
using (System.Drawing.Font font = new System.Drawing.Font(fontName, fontSize))
using (Graphics g = Graphics.FromImage(new Bitmap(1, 1)))
{
// Set anti-aliasing for smoother text rendering
g.TextRenderingHint = TextRenderingHint.AntiAlias;

      // Measure the width of the string
      SizeF textSize = g.MeasureString(text, font);

      // Apply the width factor for scaling
      return textSize.Width * widthFactor;
  }

}

// OLDSTRING = TITLE1, NEWSTRING = HELLO WORLD

clonedEntity1.Value = NEWSTRING;
var insertionPoint = clonedEntity1.AlignmentPoint;
var height = clonedEntity1.Height;
var widthFactor = clonedEntity1.WidthFactor;
var fontName = clonedEntity1.Style?.Name ?? "Arial";

// Measure text width
// double textWidth = MeasureTextWidth(clonedEntity1.Value, fontName, (float)height) * widthFactor;
// Measure text size using System.Drawing
double textWidth = MeasureTextWidth(clonedEntity1.Value, clonedEntity1.Style?.Name ?? "Arial", (float)clonedEntity1.Height, (float)clonedEntity1.WidthFactor);

// Calculate center alignment
var maxPoint = new netDxf.Vector2(insertionPoint.X - (textWidth / 2), insertionPoint.Y);

// Adjust alignment based on font
double adjustment = clonedEntity1.Style.Name switch
{
"ROMANS" => 1.45,
"ARIAL" => 0.0485,
"ISOCP" => 0.35800,
_ => 0
};

// Set AlignmentPoint (NOT InsertPoint)
clonedEntity1.InsertPoint = new XYZ(maxPoint.X + adjustment, clonedEntity1.InsertPoint.Y, 0);
clonedEntity1.HorizontalAlignment = TextHorizontalAlignment.Center;
clonedEntity1.VerticalAlignment = TextVerticalAlignmentType.Middle;

[DomCR]

Hi @ChandrasekarML,

I'm sorry to inform you bur right now there is no support for this particular feature.

Please refer to this related issue: #535