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| 1 | /* | ||
| 2 | * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | package javax.swing; | ||
| 26 | |||
| 27 | import java.awt.Component; | ||
| 28 | import java.awt.Container; | ||
| 29 | import java.awt.FocusTraversalPolicy; | ||
| 30 | import java.util.Comparator; | ||
| 31 | |||
| 32 | |||
| 33 | /** | ||
| 34 | * This class has been obsoleted by the 1.4 focus APIs. While client code may | ||
| 35 | * still use this class, developers are strongly encouraged to use | ||
| 36 | * <code>java.awt.KeyboardFocusManager</code> and | ||
| 37 | * <code>java.awt.DefaultKeyboardFocusManager</code> instead. | ||
| 38 | * <p> | ||
| 39 | * Please see | ||
| 40 | * <a href="http://java.sun.com/docs/books/tutorial/uiswing/misc/focus.html"> | ||
| 41 | * How to Use the Focus Subsystem</a>, | ||
| 42 | * a section in <em>The Java Tutorial</em>, and the | ||
| 43 | * <a href="../../java/awt/doc-files/FocusSpec.html">Focus Specification</a> | ||
| 44 | * for more information. | ||
| 45 | * | ||
| 46 | * @author Arnaud Weber | ||
| 47 | * @author David Mendenhall | ||
| 48 | */ | ||
| 49 | public class DefaultFocusManager extends FocusManager { | ||
| 50 | |||
| 51 | final FocusTraversalPolicy gluePolicy = | ||
| 52 | new LegacyGlueFocusTraversalPolicy(this); | ||
| 53 | private final FocusTraversalPolicy layoutPolicy = | ||
| 54 | new LegacyLayoutFocusTraversalPolicy(this); | ||
| 55 | private final LayoutComparator comparator = | ||
| 56 | new LayoutComparator(); | ||
| 57 | |||
| 58 | public DefaultFocusManager() { | ||
| 59 | setDefaultFocusTraversalPolicy(gluePolicy); | ||
| 60 | } | ||
| 61 | |||
| 62 | public Component getComponentAfter(Container aContainer, | ||
| 63 | Component aComponent) | ||
| 64 | { | ||
| 65 | Container root = (aContainer.isFocusCycleRoot()) | ||
| 66 | ? aContainer | ||
| 67 | : aContainer.getFocusCycleRootAncestor(); | ||
| 68 | |||
| 69 | // Support for mixed 1.4/pre-1.4 focus APIs. If a particular root's | ||
| 70 | // traversal policy is non-legacy, then honor it. | ||
| 71 | if (root != null) { | ||
| 72 | FocusTraversalPolicy policy = root.getFocusTraversalPolicy(); | ||
| 73 | if (policy != gluePolicy) { | ||
| 74 | return policy.getComponentAfter(root, aComponent); | ||
| 75 | } | ||
| 76 | |||
| 77 | comparator.setComponentOrientation(root.getComponentOrientation()); | ||
| 78 | return layoutPolicy.getComponentAfter(root, aComponent); | ||
| 79 | } | ||
| 80 | |||
| 81 | return null; | ||
| 82 | } | ||
| 83 | |||
| 84 | public Component getComponentBefore(Container aContainer, | ||
| 85 | Component aComponent) | ||
| 86 | { | ||
| 87 | Container root = (aContainer.isFocusCycleRoot()) | ||
| 88 | ? aContainer | ||
| 89 | : aContainer.getFocusCycleRootAncestor(); | ||
| 90 | |||
| 91 | // Support for mixed 1.4/pre-1.4 focus APIs. If a particular root's | ||
| 92 | // traversal policy is non-legacy, then honor it. | ||
| 93 | if (root != null) { | ||
| 94 | FocusTraversalPolicy policy = root.getFocusTraversalPolicy(); | ||
| 95 | if (policy != gluePolicy) { | ||
| 96 | return policy.getComponentBefore(root, aComponent); | ||
| 97 | } | ||
| 98 | |||
| 99 | comparator.setComponentOrientation(root.getComponentOrientation()); | ||
| 100 | return layoutPolicy.getComponentBefore(root, aComponent); | ||
| 101 | } | ||
| 102 | |||
| 103 | return null; | ||
| 104 | } | ||
| 105 | |||
| 106 | public Component getFirstComponent(Container aContainer) { | ||
| 107 | Container root = (aContainer.isFocusCycleRoot()) | ||
| 108 | ? aContainer | ||
| 109 | : aContainer.getFocusCycleRootAncestor(); | ||
| 110 | |||
| 111 | // Support for mixed 1.4/pre-1.4 focus APIs. If a particular root's | ||
| 112 | // traversal policy is non-legacy, then honor it. | ||
| 113 | if (root != null) { | ||
| 114 | FocusTraversalPolicy policy = root.getFocusTraversalPolicy(); | ||
| 115 | if (policy != gluePolicy) { | ||
| 116 | return policy.getFirstComponent(root); | ||
| 117 | } | ||
| 118 | |||
| 119 | comparator.setComponentOrientation(root.getComponentOrientation()); | ||
| 120 | return layoutPolicy.getFirstComponent(root); | ||
| 121 | } | ||
| 122 | |||
| 123 | return null; | ||
| 124 | } | ||
| 125 | |||
| 126 | public Component getLastComponent(Container aContainer) { | ||
| 127 | Container root = (aContainer.isFocusCycleRoot()) | ||
| 128 | ? aContainer | ||
| 129 | : aContainer.getFocusCycleRootAncestor(); | ||
| 130 | |||
| 131 | // Support for mixed 1.4/pre-1.4 focus APIs. If a particular root's | ||
| 132 | // traversal policy is non-legacy, then honor it. | ||
| 133 | if (root != null) { | ||
| 134 | FocusTraversalPolicy policy = root.getFocusTraversalPolicy(); | ||
| 135 | if (policy != gluePolicy) { | ||
| 136 | return policy.getLastComponent(root); | ||
| 137 | } | ||
| 138 | |||
| 139 | comparator.setComponentOrientation(root.getComponentOrientation()); | ||
| 140 | return layoutPolicy.getLastComponent(root); | ||
| 141 | } | ||
| 142 | |||
| 143 | return null; | ||
| 144 | } | ||
| 145 | |||
| 146 | public boolean compareTabOrder(Component a, Component b) { | ||
| 147 | return (comparator.compare(a, b) < 0); | ||
| 148 | } | ||
| 149 | } | ||
| 150 | |||
| 151 | final class LegacyLayoutFocusTraversalPolicy | ||
| 152 | extends LayoutFocusTraversalPolicy | ||
| 153 | { | ||
| 154 | LegacyLayoutFocusTraversalPolicy(DefaultFocusManager defaultFocusManager) { | ||
| 155 | super(new CompareTabOrderComparator(defaultFocusManager)); | ||
| 156 | } | ||
| 157 | } | ||
| 158 | |||
| 159 | final class CompareTabOrderComparator implements Comparator<Component> { | ||
| 160 | private final DefaultFocusManager defaultFocusManager; | ||
| 161 | |||
| 162 | CompareTabOrderComparator(DefaultFocusManager defaultFocusManager) { | ||
| 163 | this.defaultFocusManager = defaultFocusManager; | ||
| 164 | } | ||
| 165 | |||
| 166 | public int compare(Component o1, Component o2) { | ||
| 167 | if (o1 == o2) { | ||
| 168 | return 0; | ||
| 169 | } | ||
| 170 | return (defaultFocusManager.compareTabOrder(o1, o2)) ? -1 : 1; | ||
| 171 | } | ||
| 172 | } | ||