package sale.events;

import java.util.EventListener;

/**
  * Listener listening for {@link sale.events.FormSheetEvent FormSheetEvents} from a
  * {@link sale.Display}.
  *
  * @author Steffen Zschaler
  * @version 2.0 27/05/1999
  * @since v2.0
  */
public interface FormSheetListener extends EventListener {

  /**
    * Event triggered whenever a new FormSheet was set on the Display.
    *
    * @param e the event object.
    *
    * @override Always
    */
  public void formSheetSet (FormSheetEvent e);

  /**
    * Event triggered whenever a FormSheet was removed from the Display.
    *
    * @param e the event object.
    *
    * @override Always
    */
  public void formSheetRemoved (FormSheetEvent e);

}