001/*
002 * Copyright (c) 2005 Einar Pehrson <einar@pehrson.nu>.
003 *
004 * This file is part of
005 * CleanSheets - a spreadsheet application for the Java platform.
006 *
007 * CleanSheets is free software; you can redistribute it and/or modify
008 * it under the terms of the GNU General Public License as published by
009 * the Free Software Foundation; either version 2 of the License, or
010 * (at your option) any later version.
011 *
012 * CleanSheets is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
015 * GNU General Public License for more details.
016 *
017 * You should have received a copy of the GNU General Public License
018 * along with CleanSheets; if not, write to the Free Software
019 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
020 */
021package csheets.ui.ctrl;
022
023import java.awt.KeyboardFocusManager;
024import java.beans.PropertyChangeEvent;
025import java.beans.PropertyChangeListener;
026
027import csheets.ui.sheet.SpreadsheetTable;
028
029/**
030 * An action to be invoked on the spreadsheet table that is the focus owner.
031 * @author Einar Pehrson
032 */
033public abstract class FocusOwnerAction extends BaseAction implements PropertyChangeListener {
034
035        /** The current focus owner */
036        protected SpreadsheetTable focusOwner;
037
038        /**
039         * Creates a new focus owner action.
040         */
041        public FocusOwnerAction() {
042                KeyboardFocusManager.getCurrentKeyboardFocusManager()
043                        .addPropertyChangeListener("permanentFocusOwner", this);
044        }
045
046        /**
047         * Stores the focus owner
048         * @param event the event that was fired
049         */
050        public void propertyChange(PropertyChangeEvent event) {
051                Object o = event.getNewValue();
052                if (o instanceof SpreadsheetTable)
053                        focusOwner = (SpreadsheetTable)o;
054        }
055}