1   /*
    2    * Copyright 2002 Sun Microsystems, Inc. All rights reserved.
    3    * 
    4    * Redistribution and use in source and binary forms, with or
    5    * without modification, are permitted provided that the following
    6    * conditions are met:
    7    * 
    8    * - Redistributions of source code must retain the above copyright
    9    *   notice, this list of conditions and the following disclaimer.
   10    * 
   11    * - Redistribution in binary form must reproduce the above
   12    *   copyright notice, this list of conditions and the following
   13    *   disclaimer in the documentation and/or other materials
   14    *   provided with the distribution.
   15    * 
   16    * Neither the name of Sun Microsystems, Inc. or the names of
   17    * contributors may be used to endorse or promote products derived
   18    * from this software without specific prior written permission.
   19    * 
   20    * This software is provided "AS IS," without a warranty of any
   21    * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
   22    * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
   23    * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
   24    * EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY
   25    * DAMAGES OR LIABILITIES SUFFERED BY LICENSEE AS A RESULT OF OR
   26    * RELATING TO USE, MODIFICATION OR DISTRIBUTION OF THIS SOFTWARE OR
   27    * ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE
   28    * FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT,
   29    * SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
   30    * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF
   31    * THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS
   32    * BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
   33    * 
   34    * You acknowledge that this software is not designed, licensed or
   35    * intended for use in the design, construction, operation or
   36    * maintenance of any nuclear facility.
   37    */
   38   
   39   package javax.swing.beaninfo;
   40   
   41   import java.awt.event.ActionEvent;
   42   import java.awt.event.ActionListener;
   43   import java.awt.event.KeyEvent;
   44   import java.awt.event.KeyAdapter;
   45   
   46   import java.beans.Beans;
   47   
   48   import javax.swing.BoxLayout;
   49   import javax.swing.JPanel;
   50   import javax.swing.JTextField;
   51   import javax.swing.JOptionPane;
   52   
   53   /**
   54    * A property editor which allows for the display and instantaition of
   55    * arbitrary objects. To instantiate the object, type the package and the
   56    * class in the text field and press Enter. The Class should be in the 
   57    * classpath.
   58    *
   59    * @version %I% %G%
   60    * @author  Mark Davidson
   61    */
   62   public class SwingObjectEditor extends SwingEditorSupport {
   63       
   64       private JTextField textfield;
   65   
   66       public SwingObjectEditor() {
   67           textfield = new JTextField();
   68   
   69           // NOTE: This should work but there was a regression in JDK 1.3 beta which
   70           // doesn't fire for text fields.
   71           // This should be fixed for RC 1.
   72           textfield.addActionListener(new ActionListener()  {
   73               public void actionPerformed(ActionEvent evt)  {
   74                   // XXX - debug
   75                   System.out.println("SwingObjectEditor.actionPerformed");
   76                   handleAction();
   77               }
   78           });
   79   
   80           // XXX - Temporary workaround for 1.3 beta
   81           textfield.addKeyListener(new KeyAdapter()  {
   82               public void keyPressed(KeyEvent evt)  {
   83                   if (evt.getKeyCode() == KeyEvent.VK_ENTER)  {
   84                       handleAction();
   85                   }
   86               }
   87           });
   88           
   89           panel = new JPanel();
   90           panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));
   91           panel.add(textfield);
   92       }
   93       
   94       public void setValue(Object value)  {
   95           super.setValue(value);
   96   
   97           if (value != null)  {
   98               // Truncate the address from the object reference.
   99               String text = value.toString();
  100               
  101               // XXX javax.swing.AccessibleRelationSet.toString() has a bug in which
  102               // null is returned. Intecept this and other cases so that the tool
  103               // doens't get hosed.
  104               if (text == null) text = "";
  105               
  106               int index = text.indexOf('@');
  107               if (index != -1)  {
  108                   text = text.substring(0, index);
  109               }
  110               textfield.setText(text);
  111           } else {
  112               textfield.setText("");
  113           }
  114       }
  115   
  116       /** 
  117        * Callback method which gets handled for actionPerformed.
  118        */
  119       private void handleAction()  {
  120           String beanText = textfield.getText();
  121   
  122           try {
  123               Object obj = Beans.instantiate(this.getClass().getClassLoader(), beanText);
  124               setValue(obj);
  125           } catch (Exception ex) {
  126               JOptionPane.showMessageDialog(panel, "Can't find or load\n" + beanText);
  127           }
  128       }
  129   
  130   }