Source code: jpicedt/ui/util/DebugFocusManager.java
1 /*
2 DebugFocusManager.java - January 1, 2002 - jPicEdt 1.3.2, a picture editor for LaTeX.
3 Copyright (C) 1999-2002 Sylvain Reynal
4
5 Département de Physique
6 Ecole Nationale Supérieure de l'Electronique et de ses Applications (ENSEA)
7 6, avenue du Ponceau
8 F-95014 CERGY CEDEX
9
10 Tel : +33 130 736 245
11 Fax : +33 130 736 667
12 e-mail : reynal@ensea.fr
13 jPicEdt web page : http://www.jpicedt.org
14
15 This program is free software; you can redistribute it and/or
16 modify it under the terms of the GNU General Public License
17 as published by the Free Software Foundation; either version 2
18 of the License, or any later version.
19
20 This program is distributed in the hope that it will be useful,
21 but WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 GNU General Public License for more details.
24
25 You should have received a copy of the GNU General Public License
26 along with this program; if not, write to the Free Software
27 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
28 */
29
30 package jpicedt.ui.util;
31
32 import java.awt.*;
33 import java.awt.event.*;
34 import javax.swing.*;
35
36 /**
37 * A subclass of Swing's DefaultFocusManager that aims at helping us debug FocusEvent related bugs<p>
38 * To set this class as Swing's FocusManager, just say :<br>
39 * <code>FocusManager.setCurrentManager(an_instance_of_DebugFocusManager);</code>
40 *
41 * @since jPicEdt 1.3.2
42 * @author Sylvain Reynal
43 */
44 public class DebugFocusManager extends DefaultFocusManager {
45
46
47 /**
48 * Cause the focus manager to set the focus on the next focusable component<p>
49 * Overriden so as to display information about the component.
50 * @since jPicEdt 1.3.2
51 * @author Sylvain Reynal
52 */
53 public void focusNextComponent(Component c){
54
55 System.out.println("DebugFocusManager.focusNextComponent : " + c);
56 super.focusNextComponent(c);
57 }
58
59 /**
60 * Cause the focus manager to set the focus on the previous focusable component<p>
61 * Overriden so as to display information about the component.
62 * @since jPicEdt 1.3.2
63 * @author Sylvain Reynal
64 */
65 public void focusPreviousComponent(Component c){
66
67 System.out.println("DebugFocusManager.focusPreviousComponent : " + c);
68 super.focusPreviousComponent(c);
69 }
70
71 /**
72 * Called by a JComponent when a key event occus.<p>
73 * Overriden so as to display information about the component.
74 * @param c the focused component
75 * @param ke the key event
76 * @since jPicEdt 1.3.2
77 * @author Sylvain Reynal
78 */
79 public void processKeyEvent(Component c, KeyEvent ke){
80
81 System.out.println("DebugFocusManager.processKeyEvent : " + ke + " on component " + c);
82 super.processKeyEvent(c,ke);
83 }
84
85
86 } // class
87