Change highlight colors in dark theme

AlterNET Studio Support
1

Hi,

I’m trying to change some of the highlight colors when using the dark theme to match the vs2019 dark style.

For example, I’ve attached the following image: 2021-09-28_21-37-03

I would like to change the colors of the “if” and “return” statements and also the GetZoneValue method.

I’ve looked at the “Customize” demo, but I do not find which item to change for these statements.

Thanks for your help

2

Hi,

You can either change these lexical styles after applying dark theme with the code like this:

  syntaxEdit1.VisualThemeType = Alternet.Editor.VisualThemeType.Dark;
  ApplyColorStyles();


  private void ApplyColorStyles()
  {
      Alternet.Syntax.Lexer.ILexStyle style = GetStyleByName(syntaxEdit1.Lexer?.Scheme?.Styles, Alternet.Common.StringConsts.ReswordsInternalName);
      if (style != null)
          style.ForeColor = System.Drawing.Color.Red;
      style = GetStyleByName(syntaxEdit1.Lexer?.Scheme?.Styles, Alternet.Syntax.Parsers.Roslyn.ParserConsts.MethodInternalName);
      if (style != null)
          style.ForeColor = System.Drawing.Color.Red;
  }

  private Alternet.Syntax.Lexer.ILexStyle GetStyleByName(Alternet.Syntax.Lexer.ILexStyles styles, string name)
  {
      if (styles == null)
          return null;

      for (int i = 0; i < styles.Count; i++)
      {
          if (string.Compare(styles[i].Name, name, true) == 0)
              return styles[i];
      }

      return null;
  }

Or implement your own custom theme with the code like this:

    syntaxEdit1.VisualThemeType = Alternet.Editor.VisualThemeType.Custom;
    syntaxEdit1.VisualTheme = new CustomVisualTheme("MyCustomTheme");

    public class CustomVisualTheme : Alternet.Editor.StandardVisualTheme
    {
        public CustomVisualTheme(string name, System.Drawing.Font font = null)
           : base(name, font)
        {
        }

        protected override Alternet.Editor.VisualThemeColors GetColors()
        {
            var colors = Alternet.Editor.DarkVisualTheme.Instance.Colors.Clone();
            colors.Reswords = System.Drawing.Color.Red;
            colors.WindowBackground = System.Drawing.Color.FromArgb(40, 40, 40);
            return colors;
        }
    }

Regards,
Andrew

3

Thank you, this is working properly.
As reference for other people, the style item that need to be changed for the if/else and return statements is ParserConsts.ControlKeywordInternalName