001    /**
002     * Java Gui Builder - A library to build GUIs using an XML file.
003     * Copyright 2002, 2003 (C) François Beausoleil
004     *
005     * This library is free software; you can redistribute it and/or
006     * modify it under the terms of the GNU Lesser General Public
007     * License as published by the Free Software Foundation; either
008     * version 2.1 of the License, or (at your option) any later version.
009     *
010     * This library is distributed in the hope that it will be useful,
011     * but WITHOUT ANY WARRANTY; without even the implied warranty of
012     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
013     * Lesser General Public License for more details.
014     *
015     * You should have received a copy of the GNU Lesser General Public
016     * License along with this library; if not, write to the Free Software
017     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
018     */
019    
020    package jgb.handlers.swing;
021    
022    import jgb.builder.TagHandler;
023    import org.xml.sax.SAXException;
024    
025    import javax.swing.*;
026    import java.awt.*;
027    import java.util.Map;
028    
029    /**
030     * @since 0.1a
031     * @author Francois Beausoleil, <a href="mailto:fbos@users.sourceforge.net">fbos@users.sourceforge.net</a>
032     */
033    public class ControlsTagHandler extends AbstractTagHandler {
034        public void enterElement(Map atts) throws SAXException {
035            final Window window = (Window)getCurrentObject();
036            if (null == window) {
037                throwParsingException(
038                        new NullPointerException("Current window is null in controls")
039                );
040            }
041            Container contentPane = null;
042    
043            if (window instanceof JFrame) {
044                JFrame frame = (JFrame)window;
045                contentPane = frame.getContentPane();
046            } else if (window instanceof JDialog) {
047                JDialog dialog = (JDialog)window;
048                contentPane = dialog.getContentPane();
049            } else {
050                throwParsingException("<controls> may not handle objects other than JFrame or JDialog");
051            }
052    
053            pushCurrentObject(getCurrentObjectId(), contentPane);
054        }
055    
056        public void exitElement() throws SAXException {
057            popCurrentObject();
058            tagContext.remove(TagHandler.CURRENT_CONSTRAINTS_KEY);
059        }
060    }