sclass JTargetAndActualSlider extends MetaWithChangeListeners is Swingable {
  TargetAndActual<Double> data = new(0.0, 0.0);
  settableWithVar bool sliderEnabled = true;
  settableWithVar double min;
  settableWithVar double max = 100;
  
  transient JColorBar bar;
  transient JSlider slider;
  
  *() {}
  *(TargetAndActual<Double> *data) {}
  
  double value() { ret data.value(); }

  cachedVisualize {
    bar = swing(-> new JColorBar().max(max));
    data.varActual().onChangeAndNow(-> bar.setValue(value()));
    slider = jLiveValueSlider_double_bothWays(min, max, data.varTarget());
    varSliderEnabled().onChangeAndNow(-> setEnabled(slider, sliderEnabled));
    ret vstackWithSpacing(bar, slider);
  }
}