sclass JG22Labels extends MetaWithChangeListeners {
  settableWithVar bool showCount = true;
  settableWithVar bool allowCreation = true;
  settableWithVar L<G22Label> labels;
  
  transient JLabel lblInfo = jlabel();
  transient JPanel line = jline();
  transient ReliableSingleThread rstUpdate = new(r _update);
  
  cachedVisualize {
    varLabels().onChangeAndNow(rstUpdate);
    ret line;
  }
  
  void _update {
    var labels = labels();
    
    removeAllComponents(line);
    if (showCount) {
      setText(lblInfo, nLabels(labels) + (empty(labels) ? "" : ":"));
      line.add(lblInfo);
    }
    
    fOr (label : labels)
      line.add(makeLabelComponent(label));
      
    if (allowCreation)
      line.add(jimageButtonScaledToWidth(16, #1103069, "Add a label", r addALabel));
  }
  
  JG22Label makeLabelComponent(G22Label label) {
    ret new JG22Label(label);
  }
  
  void addALabel() swing {
    line.add(new G22Label);
  }
}