Source code: mindbright/util/AWTConvenience.java
1 /******************************************************************************
2 *
3 * Copyright (c) 1998,99 by Mindbright Technology AB, Stockholm, Sweden.
4 * www.mindbright.se, info@mindbright.se
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 *****************************************************************************
17 * $Author: nallen $
18 * $Date: 2001/11/12 16:31:29 $
19 * $Name: $
20 *****************************************************************************/
21 package mindbright.util;
22
23 import java.awt.*;
24 import java.awt.event.*;
25
26 public abstract class AWTConvenience {
27
28 public static class CloseAction implements ActionListener {
29 Dialog dialog;
30 public CloseAction(Dialog dialog) {
31 this.dialog = dialog;
32 }
33 public void actionPerformed(ActionEvent e) {
34 dialog.setVisible(false);
35 }
36 }
37
38 public static class CloseAdapter extends WindowAdapter {
39 Button b;
40 public CloseAdapter(Button b) {
41 this.b = b;
42 }
43 public void windowClosing(WindowEvent e) {
44 b.dispatchEvent(new ActionEvent(b, ActionEvent.ACTION_PERFORMED,
45 b.getActionCommand()));
46 }
47 }
48
49 public static class OKCancelAdapter extends KeyAdapter {
50
51 protected static boolean isMRJ = false;
52
53 static {
54 try { // see <http://developer.apple.com/qa/java/java17.html>
55 isMRJ = (System.getProperty("mrj.version") != null);
56 } catch (Exception e) {
57 // applets may not be able to do this
58 }
59 }
60
61 Button butOK;
62 Button butCancel;
63
64 public OKCancelAdapter(Button ok, Button cancel) {
65 this.butOK = ok;
66 this.butCancel = cancel;
67 }
68
69 protected void pushButton(Button target) {
70 if (isMRJ) { // see <http://developer.apple.com/qa/java/java01.html>
71 target.dispatchEvent(new KeyEvent(target, KeyEvent.KEY_PRESSED,
72 System.currentTimeMillis(), 0, KeyEvent.VK_ENTER,
73 (char)KeyEvent.VK_ENTER));
74 } else { // still can work, just no visual feedback
75 target.dispatchEvent(new ActionEvent(target, ActionEvent.ACTION_PERFORMED,
76 target.getActionCommand()));
77 }
78 }
79
80 public void keyReleased(KeyEvent e) {
81 switch(e.getKeyCode()) {
82 case KeyEvent.VK_ENTER : if (butOK != null) pushButton(butOK); break;
83 case KeyEvent.VK_ESCAPE : if (butCancel != null) pushButton(butCancel); break;
84 }
85 }
86 }
87
88 public final static void placeDialog(Dialog diag) {
89 Dimension sDim = Toolkit.getDefaultToolkit().getScreenSize();
90 Dimension mDim = diag.getSize();
91 int x, y;
92 x = ((sDim.width / 2) - (mDim.width / 2));
93 y = ((sDim.height / 2) - (mDim.height / 2));
94 diag.setLocation(x, y);
95 }
96
97 public final static void setBackgroundOfChildren(Container container) {
98 Component[] children = container.getComponents();
99 container.setBackground(SystemColor.menu);
100 for(int i = 0; i < children.length; i++) {
101 if(children[i] instanceof Choice)
102 continue;
103 children[i].setBackground(SystemColor.menu);
104
105 if(children[i] instanceof Container) {
106 setBackgroundOfChildren((Container)children[i]);
107 } else if(children[i] instanceof Choice) {
108 continue;
109 } else if(children[i] instanceof TextField || children[i] instanceof List) {
110 children[i].setBackground(SystemColor.text);
111 } else {
112 children[i].setBackground(SystemColor.menu);
113 }
114 }
115 }
116
117 public final static void setKeyListenerOfChildren(Container container, KeyListener listener,
118 Class typeOfChild) {
119 Component[] children = container.getComponents();
120 for(int i = 0; i < children.length; i++) {
121 if(children[i] instanceof Choice)
122 continue;
123 if(children[i] instanceof Container) {
124 setKeyListenerOfChildren((Container)children[i], listener, typeOfChild);
125 } else if(children[i] != null && (typeOfChild == null ||
126 typeOfChild.isInstance(children[i]))) {
127 children[i].addKeyListener(listener);
128 }
129 }
130 }
131
132 }