/*
* @(#)DefaultFocusManager.java 1.30 05/11/17
*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package javax.swing;
import java.awt.Component;
import java.awt.Container;
import java.awt.FocusTraversalPolicy;
import java.util.Comparator;
/**
* This class has been obsoleted by the 1.4 focus APIs. While client code may
* still use this class, developers are strongly encouraged to use
* <code>java.awt.KeyboardFocusManager</code> and
* <code>java.awt.DefaultKeyboardFocusManager</code> instead.
* <p>
* Please see
* <a href="http://java.sun.com/docs/books/tutorial/uiswing/misc/focus.html">
* How to Use the Focus Subsystem</a>,
* a section in <em>The Java Tutorial</em>, and the
* <a href="../../java/awt/doc-files/FocusSpec.html">Focus Specification</a>
* for more information.
*
* @version 1.30, 11/17/05
* @author Arnaud Weber
* @author David Mendenhall
*/
public class DefaultFocusManager extends FocusManager {
final FocusTraversalPolicy gluePolicy =
new LegacyGlueFocusTraversalPolicy(this);
private final FocusTraversalPolicy layoutPolicy =
new LegacyLayoutFocusTraversalPolicy(this);
private final LayoutComparator comparator =
new LayoutComparator();
public DefaultFocusManager() {
setDefaultFocusTraversalPolicy(gluePolicy);
}
public Component getComponentAfter(Container aContainer,
Component aComponent)
{
Container root = (aContainer.isFocusCycleRoot())
? aContainer
: aContainer.getFocusCycleRootAncestor();
// Support for mixed 1.4/pre-1.4 focus APIs. If a particular root's
// traversal policy is non-legacy, then honor it.
if (root != null) {
FocusTraversalPolicy policy = root.getFocusTraversalPolicy();
if (policy != gluePolicy) {
return policy.getComponentAfter(root, aComponent);
}
comparator.setComponentOrientation(root.getComponentOrientation());
return layoutPolicy.getComponentAfter(root, aComponent);
}
return null;
}
public Component getComponentBefore(Container aContainer,
Component aComponent)
{
Container root = (aContainer.isFocusCycleRoot())
? aContainer
: aContainer.getFocusCycleRootAncestor();
// Support for mixed 1.4/pre-1.4 focus APIs. If a particular root's
// traversal policy is non-legacy, then honor it.
if (root != null) {
FocusTraversalPolicy policy = root.getFocusTraversalPolicy();
if (policy != gluePolicy) {
return policy.getComponentBefore(root, aComponent);
}
comparator.setComponentOrientation(root.getComponentOrientation());
return layoutPolicy.getComponentBefore(root, aComponent);
}
return null;
}
public Component getFirstComponent(Container aContainer) {
Container root = (aContainer.isFocusCycleRoot())
? aContainer
: aContainer.getFocusCycleRootAncestor();
// Support for mixed 1.4/pre-1.4 focus APIs. If a particular root's
// traversal policy is non-legacy, then honor it.
if (root != null) {
FocusTraversalPolicy policy = root.getFocusTraversalPolicy();
if (policy != gluePolicy) {
return policy.getFirstComponent(root);
}
comparator.setComponentOrientation(root.getComponentOrientation());
return layoutPolicy.getFirstComponent(root);
}
return null;
}
public Component getLastComponent(Container aContainer) {
Container root = (aContainer.isFocusCycleRoot())
? aContainer
: aContainer.getFocusCycleRootAncestor();
// Support for mixed 1.4/pre-1.4 focus APIs. If a particular root's
// traversal policy is non-legacy, then honor it.
if (root != null) {
FocusTraversalPolicy policy = root.getFocusTraversalPolicy();
if (policy != gluePolicy) {
return policy.getLastComponent(root);
}
comparator.setComponentOrientation(root.getComponentOrientation());
return layoutPolicy.getLastComponent(root);
}
return null;
}
public boolean compareTabOrder(Component a, Component b) {
return (comparator.compare(a, b) < 0);
}
}
final class LegacyLayoutFocusTraversalPolicy
extends LayoutFocusTraversalPolicy
{
LegacyLayoutFocusTraversalPolicy(DefaultFocusManager defaultFocusManager) {
super(new CompareTabOrderComparator(defaultFocusManager));
}
}
final class CompareTabOrderComparator implements Comparator {
private final DefaultFocusManager defaultFocusManager;
CompareTabOrderComparator(DefaultFocusManager defaultFocusManager) {
this.defaultFocusManager = defaultFocusManager;
}
public int compare(Object o1, Object o2) {
if (o1 == o2) {
return 0;
}
return (defaultFocusManager.compareTabOrder((Component)o1,
(Component)o2)) ? -1 : 1;
}
}