XTextStyle Kerning Property. The kerning method. ABCpdf .NET PDF Library.

The kerning method.

Kerning is similar to character spacing in that it controls how far apart two characters are. However rather than being a constant, it is a value which is determined by the two characters themselves. So the kerning for "tt" would likely be different than for "te".

The KerningType enumeration may take the following values:

• None
• Default

The default kerning method is based around the kerning tables in the TrueType font file. Not all fonts contain kerning tables so not all fonts will kern.

The following shows how to insert a table of contents while disabling kerning.

[C#]
string text = File.ReadAllText("tableofcontents.txt");
text = text.Replace("\r", "<br>"); // make our carriage returns into breaks
text = text.Replace(" ", "     "); // make our indent at start of line into nbsp
using (Doc doc = new Doc()) {
  doc.TextStyle.Size = 36;
  doc.TextStyle.Kerning = XTextStyle.KerningType.None;
  doc.Rect.Inset(10, 10);
  doc.Page = doc.AddPage();
  doc.AddHtml(text.Replace(" ~", "<leader>.</leader>"));
  doc.Save("TableOfContentsWithLeaders.pdf");
}

[Visual Basic]
  Dim text As String = File.ReadAllText("tableofcontents.txt")
  text = text.Replace(vbCr, "<br>")
  ' make our carriage returns into breaks
  text = text.Replace(" ", "     ")
  ' make our indent at start of line into nbsp
  Using doc As New Doc()
    doc.TextStyle.Size = 36
    doc.TextStyle.Kerning = XTextStyle.KerningType.None
    doc.Rect.Inset(10, 10)
    doc.Page = doc.AddPage()
    doc.AddHtml(text.Replace(" ~", "<leader>.</leader>"))
    doc.Save("TableOfContentsWithLeaders.pdf")
  End Using
End Sub


Using the following input text.

Chapter 1: Getting Started ~1
Introduction ~2
Next Steps ~3
Chapter 2: What To Do ~4
Some Difficult Bits ~15
Some More Difficult Bits ~20
Chapter 3: In Conclusion ~21
Summary ~22
Endword ~23

We get the following output.

TableOfContentsWithLeaders.pdf