import java.awt.*;

public class YesNoDialog extends Dialog {

   public static final int NO = 0;
   public static final int YES = 1;
   public static final int CANCEL = -1;

   protected Button yes = null, no = null, cancel = null;
   protected MultiLineLabel label;

  public YesNoDialog( Frame parent, String title, String message,
                      String yes_label, String no_label, String cancel_label)
  {

     super(parent, title, true);
     this.setForeground(parent.getForeground());
     this.setBackground(parent.getBackground());
     this.setLayout(new BorderLayout(15,15));

     label = new MultiLineLabel(message, 20, 20);
     this.add("Center", label);

     Panel p = new Panel();

     p.setLayout(new FlowLayout(FlowLayout.CENTER, 15, 15));
     if (yes_label != null) p.add(yes = new Button(yes_label));
     if (no_label != null) p.add(no = new Button(no_label));
     if (cancel_label != null) p.add(cancel = new Button(cancel_label));
     this.add("South", p);

     this.pack();
  }

  public boolean action(Event e, Object arg)

  {
    if (e.target instanceof Button) {
       this.hide();
       this.dispose();
       if (e.target == yes) answer(YES);
       else if (e.target == no) answer(NO);
       else answer(CANCEL);
       return true;
    }
    else return false;
  }

  protected void answer(int answer)
  {
    switch(answer) {
    case YES:
       yes(); break;
    case NO:
       no(); break;
    case CANCEL:
       cancel(); break;
    }
  }
  protected void yes() {}
  protected void no() {}
  protected void cancel() {}
}