Source for org.jfree.report.modules.gui.swing.common.WindowSizeLimiter

   1: /**
   2:  * ========================================
   3:  * JFreeReport : a free Java report library
   4:  * ========================================
   5:  *
   6:  * Project Info:  http://reporting.pentaho.org/
   7:  *
   8:  * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
   9:  *
  10:  * This library is free software; you can redistribute it and/or modify it under the terms
  11:  * of the GNU Lesser General Public License as published by the Free Software Foundation;
  12:  * either version 2.1 of the License, or (at your option) any later version.
  13:  *
  14:  * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
  15:  * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  16:  * See the GNU Lesser General Public License for more details.
  17:  *
  18:  * You should have received a copy of the GNU Lesser General Public License along with this
  19:  * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  20:  * Boston, MA 02111-1307, USA.
  21:  *
  22:  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
  23:  * in the United States and other countries.]
  24:  *
  25:  * ------------
  26:  * $Id: WindowSizeLimiter.java 2725 2007-04-01 18:49:29Z taqua $
  27:  * ------------
  28:  * (C) Copyright 2000-2005, by Object Refinery Limited.
  29:  * (C) Copyright 2005-2007, by Pentaho Corporation.
  30:  */
  31: 
  32: package org.jfree.report.modules.gui.swing.common;
  33: 
  34: import java.awt.Component;
  35: import java.awt.Dimension;
  36: import java.awt.event.ComponentAdapter;
  37: import java.awt.event.ComponentEvent;
  38: 
  39: /**
  40:  * A small helper class to limit the maximum size of an element to the elements maximum
  41:  * size. If the element is resized, the defined maximum size is enforced on the element.
  42:  *
  43:  * @author Thomas Morgner
  44:  */
  45: public class WindowSizeLimiter extends ComponentAdapter
  46: {
  47:   /**
  48:    * The current source.
  49:    */
  50:   private Object currentSource;
  51: 
  52:   /**
  53:    * Default-Constructor.
  54:    */
  55:   public WindowSizeLimiter()
  56:   {
  57: 
  58:   }
  59: 
  60:   /**
  61:    * Invoked when the component's size changes.
  62:    *
  63:    * @param e the event.
  64:    */
  65:   public void componentResized (final ComponentEvent e)
  66:   {
  67:     if (e.getSource() == currentSource)
  68:     {
  69:       return;
  70:     }
  71: 
  72:     if (e.getSource() instanceof Component)
  73:     {
  74:       currentSource = e.getSource();
  75:       final Component c = (Component) e.getSource();
  76:       final Dimension d = c.getMaximumSize();
  77:       final Dimension s = c.getSize();
  78:       if (s.width > d.width)
  79:       {
  80:         s.width = d.width;
  81:       }
  82:       if (s.height > d.height)
  83:       {
  84:         s.height = d.height;
  85:       }
  86:       c.setSize(s);
  87:       currentSource = null;
  88:     }
  89: 
  90:   }
  91: }