/* * Copyright (c) 2000, 2008, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package javax.swing;import java.awt.FocusTraversalPolicy;import java.awt.Component;import java.awt.Container;import java.awt.Window;import java.util.HashMap;import java.util.HashSet;import java.io.*;/** * A FocusTraversalPolicy which provides support for legacy applications which * handle focus traversal via JComponent.setNextFocusableComponent or by * installing a custom DefaultFocusManager. If a specific traversal has not * been hard coded, then that traversal is provided either by the custom * DefaultFocusManager, or by a wrapped FocusTraversalPolicy instance. * * @author David Mendenhall */final class LegacyGlueFocusTraversalPolicy extends FocusTraversalPolicy implements Serializable{ private transient FocusTraversalPolicy delegatePolicy; private transient DefaultFocusManager delegateManager; private HashMap<Component, Component> forwardMap = new HashMap<Component, Component>(), backwardMap = new HashMap<Component, Component>(); LegacyGlueFocusTraversalPolicy(FocusTraversalPolicy delegatePolicy) { this.delegatePolicy = delegatePolicy; } LegacyGlueFocusTraversalPolicy(DefaultFocusManager delegateManager) { this.delegateManager = delegateManager; } void setNextFocusableComponent(Component left, Component right) { forwardMap.put(left, right); backwardMap.put(right, left); } void unsetNextFocusableComponent(Component left, Component right) { forwardMap.remove(left); backwardMap.remove(right); } public Component getComponentAfter(Container focusCycleRoot, Component aComponent) { Component hardCoded = aComponent, prevHardCoded; HashSet<Component> sanity = new HashSet<Component>(); do { prevHardCoded = hardCoded; hardCoded = forwardMap.get(hardCoded); if (hardCoded == null) { if (delegatePolicy != null && prevHardCoded.isFocusCycleRoot(focusCycleRoot)) { return delegatePolicy.getComponentAfter(focusCycleRoot, prevHardCoded); } else if (delegateManager != null) { return delegateManager. getComponentAfter(focusCycleRoot, aComponent); } else { return null; } } if (sanity.contains(hardCoded)) { // cycle detected; bail return null; } sanity.add(hardCoded); } while (!accept(hardCoded)); return hardCoded; } public Component getComponentBefore(Container focusCycleRoot, Component aComponent) { Component hardCoded = aComponent, prevHardCoded; HashSet<Component> sanity = new HashSet<Component>(); do { prevHardCoded = hardCoded; hardCoded = backwardMap.get(hardCoded); if (hardCoded == null) { if (delegatePolicy != null && prevHardCoded.isFocusCycleRoot(focusCycleRoot)) { return delegatePolicy.getComponentBefore(focusCycleRoot, prevHardCoded); } else if (delegateManager != null) { return delegateManager. getComponentBefore(focusCycleRoot, aComponent); } else { return null; } } if (sanity.contains(hardCoded)) { // cycle detected; bail return null; } sanity.add(hardCoded); } while (!accept(hardCoded)); return hardCoded; } public Component getFirstComponent(Container focusCycleRoot) { if (delegatePolicy != null) { return delegatePolicy.getFirstComponent(focusCycleRoot); } else if (delegateManager != null) { return delegateManager.getFirstComponent(focusCycleRoot); } else { return null; } } public Component getLastComponent(Container focusCycleRoot) { if (delegatePolicy != null) { return delegatePolicy.getLastComponent(focusCycleRoot); } else if (delegateManager != null) { return delegateManager.getLastComponent(focusCycleRoot); } else { return null; } } public Component getDefaultComponent(Container focusCycleRoot) { if (delegatePolicy != null) { return delegatePolicy.getDefaultComponent(focusCycleRoot); } else { return getFirstComponent(focusCycleRoot); } } private boolean accept(Component aComponent) { if (!(aComponent.isVisible() && aComponent.isDisplayable() && aComponent.isFocusable() && aComponent.isEnabled())) { return false; } // Verify that the Component is recursively enabled. Disabling a // heavyweight Container disables its children, whereas disabling // a lightweight Container does not. if (!(aComponent instanceof Window)) { for (Container enableTest = aComponent.getParent(); enableTest != null; enableTest = enableTest.getParent()) { if (!(enableTest.isEnabled() || enableTest.isLightweight())) { return false; } if (enableTest instanceof Window) { break; } } } return true; } private void writeObject(ObjectOutputStream out) throws IOException { out.defaultWriteObject(); if (delegatePolicy instanceof Serializable) { out.writeObject(delegatePolicy); } else { out.writeObject(null); } if (delegateManager instanceof Serializable) { out.writeObject(delegateManager); } else { out.writeObject(null); } } private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException { in.defaultReadObject(); delegatePolicy = (FocusTraversalPolicy)in.readObject(); delegateManager = (DefaultFocusManager)in.readObject(); }}
/*
* Copyright (c) 2000, 2008, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package javax.swing;
import java.awt.FocusTraversalPolicy;
import java.awt.Component;
import java.awt.Container;
import java.awt.Window;
import java.util.HashMap;
import java.util.HashSet;
import java.io.*;
/**
* A FocusTraversalPolicy which provides support for legacy applications which
* handle focus traversal via JComponent.setNextFocusableComponent or by
* installing a custom DefaultFocusManager. If a specific traversal has not
* been hard coded, then that traversal is provided either by the custom
* DefaultFocusManager, or by a wrapped FocusTraversalPolicy instance.
*
* @author David Mendenhall
*/
final class LegacyGlueFocusTraversalPolicy extends FocusTraversalPolicy
implements Serializable
{
private transient FocusTraversalPolicy delegatePolicy;
private transient DefaultFocusManager delegateManager;
private HashMap<Component, Component> forwardMap = new HashMap<Component, Component>(),
backwardMap = new HashMap<Component, Component>();
LegacyGlueFocusTraversalPolicy(FocusTraversalPolicy delegatePolicy) {
this.delegatePolicy = delegatePolicy;
}
LegacyGlueFocusTraversalPolicy(DefaultFocusManager delegateManager) {
this.delegateManager = delegateManager;
}
void setNextFocusableComponent(Component left, Component right) {
forwardMap.put(left, right);
backwardMap.put(right, left);
}
void unsetNextFocusableComponent(Component left, Component right) {
forwardMap.remove(left);
backwardMap.remove(right);
}
public Component getComponentAfter(Container focusCycleRoot,
Component aComponent) {
Component hardCoded = aComponent, prevHardCoded;
HashSet<Component> sanity = new HashSet<Component>();
do {
prevHardCoded = hardCoded;
hardCoded = forwardMap.get(hardCoded);
if (hardCoded == null) {
if (delegatePolicy != null &&
prevHardCoded.isFocusCycleRoot(focusCycleRoot)) {
return delegatePolicy.getComponentAfter(focusCycleRoot,
prevHardCoded);
} else if (delegateManager != null) {
return delegateManager.
getComponentAfter(focusCycleRoot, aComponent);
} else {
return null;
}
}
if (sanity.contains(hardCoded)) {
// cycle detected; bail
return null;
}
sanity.add(hardCoded);
} while (!accept(hardCoded));
return hardCoded;
}
public Component getComponentBefore(Container focusCycleRoot,
Component aComponent) {
Component hardCoded = aComponent, prevHardCoded;
HashSet<Component> sanity = new HashSet<Component>();
do {
prevHardCoded = hardCoded;
hardCoded = backwardMap.get(hardCoded);
if (hardCoded == null) {
if (delegatePolicy != null &&
prevHardCoded.isFocusCycleRoot(focusCycleRoot)) {
return delegatePolicy.getComponentBefore(focusCycleRoot,
prevHardCoded);
} else if (delegateManager != null) {
return delegateManager.
getComponentBefore(focusCycleRoot, aComponent);
} else {
return null;
}
}
if (sanity.contains(hardCoded)) {
// cycle detected; bail
return null;
}
sanity.add(hardCoded);
} while (!accept(hardCoded));
return hardCoded;
}
public Component getFirstComponent(Container focusCycleRoot) {
if (delegatePolicy != null) {
return delegatePolicy.getFirstComponent(focusCycleRoot);
} else if (delegateManager != null) {
return delegateManager.getFirstComponent(focusCycleRoot);
} else {
return null;
}
}
public Component getLastComponent(Container focusCycleRoot) {
if (delegatePolicy != null) {
return delegatePolicy.getLastComponent(focusCycleRoot);
} else if (delegateManager != null) {
return delegateManager.getLastComponent(focusCycleRoot);
} else {
return null;
}
}
public Component getDefaultComponent(Container focusCycleRoot) {
if (delegatePolicy != null) {
return delegatePolicy.getDefaultComponent(focusCycleRoot);
} else {
return getFirstComponent(focusCycleRoot);
}
}
private boolean accept(Component aComponent) {
if (!(aComponent.isVisible() && aComponent.isDisplayable() &&
aComponent.isFocusable() && aComponent.isEnabled())) {
return false;
}
// Verify that the Component is recursively enabled. Disabling a
// heavyweight Container disables its children, whereas disabling
// a lightweight Container does not.
if (!(aComponent instanceof Window)) {
for (Container enableTest = aComponent.getParent();
enableTest != null;
enableTest = enableTest.getParent())
{
if (!(enableTest.isEnabled() || enableTest.isLightweight())) {
return false;
}
if (enableTest instanceof Window) {
break;
}
}
}
return true;
}
private void writeObject(ObjectOutputStream out) throws IOException {
out.defaultWriteObject();
if (delegatePolicy instanceof Serializable) {
out.writeObject(delegatePolicy);
} else {
out.writeObject(null);
}
if (delegateManager instanceof Serializable) {
out.writeObject(delegateManager);
} else {
out.writeObject(null);
}
}
private void readObject(ObjectInputStream in)
throws IOException, ClassNotFoundException
{
in.defaultReadObject();
delegatePolicy = (FocusTraversalPolicy)in.readObject();
delegateManager = (DefaultFocusManager)in.readObject();
}
}