sclass JG22DataWrangler is Swingable {
  new TargetAndActual<Double> maxKB; // kilobytes per compressed image (pessimistic estimate)
  new TargetAndActual<Double> coveredPixelsPercentage;
  new TargetAndActual<Double> detailLevel;
  
  cachedVisualize {
    var form = new JForm;
    //form.addRow("Image source", jlabel("Left screen half"));
    form.addRow("Compressed image size (KB)", new JTargetAndActualSlider(maxKB));
    form.addRow("Detail level", new JTargetAndActualSlider(detailLevel, false)
    ret form.visualize();
  }
}