author | xdono |
Mon, 15 Dec 2008 16:55:25 -0800 | |
changeset 1639 | a97859015238 |
parent 1301 | 15e81207e1f2 |
child 5506 | 202f599c92aa |
permissions | -rw-r--r-- |
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/* |
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* Copyright 2000-2008 Sun Microsystems, Inc. All Rights Reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Sun designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Sun in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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* CA 95054 USA or visit www.sun.com if you need additional information or |
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* have any questions. |
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*/ |
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package javax.swing; |
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import java.awt.FocusTraversalPolicy; |
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import java.awt.Component; |
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import java.awt.Container; |
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import java.awt.Window; |
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import java.util.HashMap; |
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import java.util.HashSet; |
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import java.io.*; |
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/** |
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* A FocusTraversalPolicy which provides support for legacy applications which |
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* handle focus traversal via JComponent.setNextFocusableComponent or by |
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* installing a custom DefaultFocusManager. If a specific traversal has not |
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* been hard coded, then that traversal is provided either by the custom |
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* DefaultFocusManager, or by a wrapped FocusTraversalPolicy instance. |
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* |
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* @author David Mendenhall |
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*/ |
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final class LegacyGlueFocusTraversalPolicy extends FocusTraversalPolicy |
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implements Serializable |
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{ |
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private transient FocusTraversalPolicy delegatePolicy; |
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private transient DefaultFocusManager delegateManager; |
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15e81207e1f2
6727662: Code improvement and warnings removing from swing packages
rupashka
parents:
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diff
changeset
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private HashMap<Component, Component> forwardMap = new HashMap<Component, Component>(), |
15e81207e1f2
6727662: Code improvement and warnings removing from swing packages
rupashka
parents:
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diff
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backwardMap = new HashMap<Component, Component>(); |
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LegacyGlueFocusTraversalPolicy(FocusTraversalPolicy delegatePolicy) { |
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this.delegatePolicy = delegatePolicy; |
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} |
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LegacyGlueFocusTraversalPolicy(DefaultFocusManager delegateManager) { |
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this.delegateManager = delegateManager; |
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} |
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void setNextFocusableComponent(Component left, Component right) { |
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forwardMap.put(left, right); |
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backwardMap.put(right, left); |
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} |
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void unsetNextFocusableComponent(Component left, Component right) { |
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forwardMap.remove(left); |
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backwardMap.remove(right); |
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} |
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public Component getComponentAfter(Container focusCycleRoot, |
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Component aComponent) { |
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Component hardCoded = aComponent, prevHardCoded; |
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6727662: Code improvement and warnings removing from swing packages
rupashka
parents:
2
diff
changeset
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HashSet<Component> sanity = new HashSet<Component>(); |
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do { |
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prevHardCoded = hardCoded; |
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6727662: Code improvement and warnings removing from swing packages
rupashka
parents:
2
diff
changeset
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hardCoded = forwardMap.get(hardCoded); |
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if (hardCoded == null) { |
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if (delegatePolicy != null && |
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prevHardCoded.isFocusCycleRoot(focusCycleRoot)) { |
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return delegatePolicy.getComponentAfter(focusCycleRoot, |
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prevHardCoded); |
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} else if (delegateManager != null) { |
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return delegateManager. |
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getComponentAfter(focusCycleRoot, aComponent); |
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} else { |
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return null; |
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} |
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} |
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if (sanity.contains(hardCoded)) { |
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// cycle detected; bail |
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return null; |
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} |
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sanity.add(hardCoded); |
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} while (!accept(hardCoded)); |
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return hardCoded; |
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} |
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public Component getComponentBefore(Container focusCycleRoot, |
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Component aComponent) { |
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Component hardCoded = aComponent, prevHardCoded; |
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15e81207e1f2
6727662: Code improvement and warnings removing from swing packages
rupashka
parents:
2
diff
changeset
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HashSet<Component> sanity = new HashSet<Component>(); |
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do { |
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prevHardCoded = hardCoded; |
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15e81207e1f2
6727662: Code improvement and warnings removing from swing packages
rupashka
parents:
2
diff
changeset
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hardCoded = backwardMap.get(hardCoded); |
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if (hardCoded == null) { |
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if (delegatePolicy != null && |
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prevHardCoded.isFocusCycleRoot(focusCycleRoot)) { |
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return delegatePolicy.getComponentBefore(focusCycleRoot, |
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prevHardCoded); |
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} else if (delegateManager != null) { |
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return delegateManager. |
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getComponentBefore(focusCycleRoot, aComponent); |
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} else { |
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return null; |
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} |
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} |
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if (sanity.contains(hardCoded)) { |
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// cycle detected; bail |
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return null; |
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} |
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sanity.add(hardCoded); |
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} while (!accept(hardCoded)); |
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return hardCoded; |
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} |
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public Component getFirstComponent(Container focusCycleRoot) { |
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if (delegatePolicy != null) { |
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return delegatePolicy.getFirstComponent(focusCycleRoot); |
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} else if (delegateManager != null) { |
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return delegateManager.getFirstComponent(focusCycleRoot); |
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} else { |
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return null; |
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} |
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} |
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public Component getLastComponent(Container focusCycleRoot) { |
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if (delegatePolicy != null) { |
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return delegatePolicy.getLastComponent(focusCycleRoot); |
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} else if (delegateManager != null) { |
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return delegateManager.getLastComponent(focusCycleRoot); |
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} else { |
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return null; |
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} |
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} |
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public Component getDefaultComponent(Container focusCycleRoot) { |
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if (delegatePolicy != null) { |
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return delegatePolicy.getDefaultComponent(focusCycleRoot); |
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} else { |
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return getFirstComponent(focusCycleRoot); |
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} |
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} |
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private boolean accept(Component aComponent) { |
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if (!(aComponent.isVisible() && aComponent.isDisplayable() && |
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aComponent.isFocusable() && aComponent.isEnabled())) { |
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return false; |
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} |
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// Verify that the Component is recursively enabled. Disabling a |
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// heavyweight Container disables its children, whereas disabling |
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// a lightweight Container does not. |
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if (!(aComponent instanceof Window)) { |
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for (Container enableTest = aComponent.getParent(); |
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enableTest != null; |
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enableTest = enableTest.getParent()) |
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{ |
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if (!(enableTest.isEnabled() || enableTest.isLightweight())) { |
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return false; |
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} |
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if (enableTest instanceof Window) { |
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break; |
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} |
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} |
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} |
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return true; |
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} |
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private void writeObject(ObjectOutputStream out) throws IOException { |
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out.defaultWriteObject(); |
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if (delegatePolicy instanceof Serializable) { |
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out.writeObject(delegatePolicy); |
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} else { |
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out.writeObject(null); |
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} |
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if (delegateManager instanceof Serializable) { |
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out.writeObject(delegateManager); |
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} else { |
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out.writeObject(null); |
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} |
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} |
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private void readObject(ObjectInputStream in) |
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throws IOException, ClassNotFoundException |
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{ |
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in.defaultReadObject(); |
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delegatePolicy = (FocusTraversalPolicy)in.readObject(); |
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delegateManager = (DefaultFocusManager)in.readObject(); |
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} |
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} |