FormatEditor


1   /*
2     Copyright (C) 2003 Laurent Martelli <laurent@aopsys.com>
3     
4     This program is free software; you can redistribute it and/or modify
5     it under the terms of the GNU Lesser General Public License as
6     published by the Free Software Foundation; either version 2 of the
7     License, or (at your option) any later version.
8   
9     This program is distributed in the hope that it will be useful, but
10    WITHOUT ANY WARRANTY; without even the implied warranty of
11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12    Lesser General Public License for more details.
13  
14    You should have received a copy of the GNU Lesser General Public
15    License along with this program; if not, write to the Free Software
16    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
17    USA */
18  
19  package org.objectweb.jac.aspects.gui.swing;
20  
21  import java.awt.Dimension  ;
22  import java.text.ParsePosition  ;
23  import org.objectweb.jac.aspects.gui.FieldEditor;
24  import org.objectweb.jac.aspects.gui.Format;
25  import org.objectweb.jac.core.rtti.FieldItem;
26  import org.objectweb.jac.util.WrappedThrowableException;
27  
28  public abstract class FormatEditor extends TextFieldEditor
29      implements FieldEditor
30  {
31      /** Stores the default format of the date */
32      protected Format format;
33  
34      /**
35      * Constructs a new date editor. */
36  
37      public FormatEditor(Object   substance, FieldItem field) {
38          super(substance,field);
39          textField = new JTextField(10);
40          textField.addFocusListener(this);
41          add(textField);
42          initFormat(field);
43      }
44  
45      protected abstract void initFormat(FieldItem field);
46  
47      public void setField(FieldItem field) {
48          super.setField(field);
49          initFormat(field);
50      }
51  
52      public Object   getValue() {
53          try {
54              if (textField.getText().equals("")) {
55                  return null;
56              } else {
57                  return parse(textField.getText());
58              }
59          } catch (Exception   e) {
60              throw new WrappedThrowableException(e);
61          }
62      }
63  
64      protected Object   parse(String   s) {
65          ParsePosition   pos = new ParsePosition  (0);
66          return format.parse(s,pos);        
67      }
68  
69      public void setValue(Object   value) {
70          super.setValue(value);
71          if( value != null )
72              textField.setText(format.format(value));
73      }
74  }
75
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