001 package sale.events;
002
003 import java.util.EventListener;
004
005 /**
006 * Listener listening for {@link sale.events.FormSheetEvent FormSheetEvents} from a
007 * {@link sale.Display}.
008 *
009 * @author Steffen Zschaler
010 * @version 2.0 27/05/1999
011 * @since v2.0
012 */
013 public interface FormSheetListener extends EventListener {
014
015 /**
016 * Event triggered whenever a new FormSheet was set on the Display.
017 *
018 * @param e the event object.
019 *
020 * @override Always
021 */
022 public void formSheetSet(FormSheetEvent e);
023
024 /**
025 * Event triggered whenever a FormSheet was removed from the Display.
026 *
027 * @param e the event object.
028 *
029 * @override Always
030 */
031 public void formSheetRemoved(FormSheetEvent e);
032
033 }