001 /**
002 * ========================================
003 * JFreeReport : a free Java report library
004 * ========================================
005 *
006 * Project Info: http://reporting.pentaho.org/
007 *
008 * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
009 *
010 * This library is free software; you can redistribute it and/or modify it under the terms
011 * of the GNU Lesser General Public License as published by the Free Software Foundation;
012 * either version 2.1 of the License, or (at your option) any later version.
013 *
014 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
015 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
016 * See the GNU Lesser General Public License for more details.
017 *
018 * You should have received a copy of the GNU Lesser General Public License along with this
019 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
020 * Boston, MA 02111-1307, USA.
021 *
022 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
023 * in the United States and other countries.]
024 *
025 * ------------
026 * $Id: WindowSizeLimiter.java,v 1.3 2007/04/01 18:49:30 taqua Exp $
027 * ------------
028 * (C) Copyright 2000-2005, by Object Refinery Limited.
029 * (C) Copyright 2005-2007, by Pentaho Corporation.
030 */
031
032 package org.jfree.report.modules.gui.swing.common;
033
034 import java.awt.Component;
035 import java.awt.Dimension;
036 import java.awt.event.ComponentAdapter;
037 import java.awt.event.ComponentEvent;
038
039 /**
040 * A small helper class to limit the maximum size of an element to the elements maximum
041 * size. If the element is resized, the defined maximum size is enforced on the element.
042 *
043 * @author Thomas Morgner
044 */
045 public class WindowSizeLimiter extends ComponentAdapter
046 {
047 /**
048 * The current source.
049 */
050 private Object currentSource;
051
052 /**
053 * Default-Constructor.
054 */
055 public WindowSizeLimiter()
056 {
057
058 }
059
060 /**
061 * Invoked when the component's size changes.
062 *
063 * @param e the event.
064 */
065 public void componentResized (final ComponentEvent e)
066 {
067 if (e.getSource() == currentSource)
068 {
069 return;
070 }
071
072 if (e.getSource() instanceof Component)
073 {
074 currentSource = e.getSource();
075 final Component c = (Component) e.getSource();
076 final Dimension d = c.getMaximumSize();
077 final Dimension s = c.getSize();
078 if (s.width > d.width)
079 {
080 s.width = d.width;
081 }
082 if (s.height > d.height)
083 {
084 s.height = d.height;
085 }
086 c.setSize(s);
087 currentSource = null;
088 }
089
090 }
091 }