// This file contains excerpts from the textbook Concrete
// Abstractions: An Introduction to Computer Science Using Scheme, by
// Max Hailperin, Barbara Kaiser, and Karl Knight, Copyright (c) 1998
// by the authors. Full text is available for free at
// http://www.gustavus.edu/+max/concrete-abstractions.html

import java.awt.event.*;

public class PoltergeistItemListener implements ItemListener {

  private PoltergeistThread thread;
  
  public PoltergeistItemListener(PoltergeistThread t){
    thread = t;
  }

  public void itemStateChanged(ItemEvent evt){
    if(evt.getStateChange() == ItemEvent.SELECTED){
      thread.enable();
    } else {
      thread.disable();
    }
  }
}