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    }