sclass G22SnPSelector is MetaWithChangeListeners is Swingable {
  settable new SnPSettings settings;
  
  SnPSettings get() { ret settings; }

  cachedVisualize {
    var colors = jspinner(settings.colors, 2, 256);
    main onChange(colors, -> {
      settings.colors = intFromSpinner(colors);
      change();
    });
    
    var pixelRows = jPowersOfTwoSpinner(512, settings.pixelRows);
    main onChange(pixelRows, -> {
      settings.pixelRows = intFromSpinner(pixelRows);
      change();
    });
    
    ret hstack(
      colors,
      jlabel(" colors @ "),
      pixelRows,
      jlabel(" p"));
  }
}