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1
7 package javax.swing;
8
9 import java.awt.Component  ;
10 import java.awt.Container ;
11 import java.awt.FocusTraversalPolicy ;
12 import java.util.Comparator ;
13
14
15
32 public class DefaultFocusManager extends FocusManager {
33
34 final FocusTraversalPolicy gluePolicy =
35 new LegacyGlueFocusTraversalPolicy (this);
36 private final FocusTraversalPolicy layoutPolicy =
37 new LegacyLayoutFocusTraversalPolicy(this);
38 private final LayoutComparator comparator =
39 new LayoutComparator ();
40
41 public DefaultFocusManager() {
42 setDefaultFocusTraversalPolicy(gluePolicy);
43 }
44
45 public Component getComponentAfter(Container aContainer,
46 Component aComponent)
47 {
48 Container root = (aContainer.isFocusCycleRoot())
49 ? aContainer
50 : aContainer.getFocusCycleRootAncestor();
51
52 if (root != null) {
55 FocusTraversalPolicy policy = root.getFocusTraversalPolicy();
56 if (policy != gluePolicy) {
57 return policy.getComponentAfter(root, aComponent);
58 }
59
60 comparator.setComponentOrientation(root.getComponentOrientation());
61 return layoutPolicy.getComponentAfter(root, aComponent);
62 }
63
64 return null;
65 }
66
67 public Component getComponentBefore(Container aContainer,
68 Component aComponent)
69 {
70 Container root = (aContainer.isFocusCycleRoot())
71 ? aContainer
72 : aContainer.getFocusCycleRootAncestor();
73
74 if (root != null) {
77 FocusTraversalPolicy policy = root.getFocusTraversalPolicy();
78 if (policy != gluePolicy) {
79 return policy.getComponentBefore(root, aComponent);
80 }
81
82 comparator.setComponentOrientation(root.getComponentOrientation());
83 return layoutPolicy.getComponentBefore(root, aComponent);
84 }
85
86 return null;
87 }
88
89 public Component getFirstComponent(Container aContainer) {
90 Container root = (aContainer.isFocusCycleRoot())
91 ? aContainer
92 : aContainer.getFocusCycleRootAncestor();
93
94 if (root != null) {
97 FocusTraversalPolicy policy = root.getFocusTraversalPolicy();
98 if (policy != gluePolicy) {
99 return policy.getFirstComponent(root);
100 }
101
102 comparator.setComponentOrientation(root.getComponentOrientation());
103 return layoutPolicy.getFirstComponent(root);
104 }
105
106 return null;
107 }
108
109 public Component getLastComponent(Container aContainer) {
110 Container root = (aContainer.isFocusCycleRoot())
111 ? aContainer
112 : aContainer.getFocusCycleRootAncestor();
113
114 if (root != null) {
117 FocusTraversalPolicy policy = root.getFocusTraversalPolicy();
118 if (policy != gluePolicy) {
119 return policy.getLastComponent(root);
120 }
121
122 comparator.setComponentOrientation(root.getComponentOrientation());
123 return layoutPolicy.getLastComponent(root);
124 }
125
126 return null;
127 }
128
129 public boolean compareTabOrder(Component a, Component b) {
130 return (comparator.compare(a, b) < 0);
131 }
132 }
133
134 final class LegacyLayoutFocusTraversalPolicy
135 extends LayoutFocusTraversalPolicy
136 {
137 LegacyLayoutFocusTraversalPolicy(DefaultFocusManager defaultFocusManager) {
138 super(new CompareTabOrderComparator(defaultFocusManager));
139 }
140 }
141
142 final class CompareTabOrderComparator implements Comparator {
143 private final DefaultFocusManager defaultFocusManager;
144
145 CompareTabOrderComparator(DefaultFocusManager defaultFocusManager) {
146 this.defaultFocusManager = defaultFocusManager;
147 }
148
149 public int compare(Object o1, Object o2) {
150 if (o1 == o2) {
151 return 0;
152 }
153 return (defaultFocusManager.compareTabOrder((Component )o1,
154 (Component )o2)) ? -1 : 1;
155 }
156 }
157 |
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