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| 1 | +/* | |
| 2 | + * Copyright (c) 1997, 2004, 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.*; | |
| 28 | + | |
| 29 | + | |
| 30 | +/** | |
| 31 | + * This class has been obsoleted by the 1.4 focus APIs. While client code may | |
| 32 | + * still use this class, developers are strongly encouraged to use | |
| 33 | + * <code>java.awt.KeyboardFocusManager</code> and | |
| 34 | + * <code>java.awt.DefaultKeyboardFocusManager</code> instead. | |
| 35 | + * <p> | |
| 36 | + * Please see | |
| 37 | + * <a href="http://java.sun.com/docs/books/tutorial/uiswing/misc/focus.html"> | |
| 38 | + * How to Use the Focus Subsystem</a>, | |
| 39 | + * a section in <em>The Java Tutorial</em>, and the | |
| 40 | + * <a href="../../java/awt/doc-files/FocusSpec.html">Focus Specification</a> | |
| 41 | + * for more information. | |
| 42 | + * | |
| 43 | + * @see <a href="../../java/awt/doc-files/FocusSpec.html">Focus Specification</a> | |
| 44 | + * | |
| 45 | + * @author Arnaud Weber | |
| 46 | + * @author David Mendenhall | |
| 47 | + */ | |
| 48 | +public abstract class FocusManager extends DefaultKeyboardFocusManager { | |
| 49 | + | |
| 50 | + /** | |
| 51 | + * This field is obsolete, and its use is discouraged since its | |
| 52 | + * specification is incompatible with the 1.4 focus APIs. | |
| 53 | + * The current FocusManager is no longer a property of the UI. | |
| 54 | + * Client code must query for the current FocusManager using | |
| 55 | + * <code>KeyboardFocusManager.getCurrentKeyboardFocusManager()</code>. | |
| 56 | + * See the Focus Specification for more information. | |
| 57 | + * | |
| 58 | + * @see java.awt.KeyboardFocusManager#getCurrentKeyboardFocusManager | |
| 59 | + * @see <a href="../../java/awt/doc-files/FocusSpec.html">Focus Specification</a> | |
| 60 | + */ | |
| 61 | + public static final String FOCUS_MANAGER_CLASS_PROPERTY = | |
| 62 | + "FocusManagerClassName"; | |
| 63 | + | |
| 64 | + private static boolean enabled = true; | |
| 65 | + | |
| 66 | + /** | |
| 67 | + * Returns the current <code>KeyboardFocusManager</code> instance | |
| 68 | + * for the calling thread's context. | |
| 69 | + * | |
| 70 | + * @return this thread's context's <code>KeyboardFocusManager</code> | |
| 71 | + * @see #setCurrentManager | |
| 72 | + */ | |
| 73 | + public static FocusManager getCurrentManager() { | |
| 74 | + KeyboardFocusManager manager = | |
| 75 | + KeyboardFocusManager.getCurrentKeyboardFocusManager(); | |
| 76 | + if (manager instanceof FocusManager) { | |
| 77 | + return (FocusManager)manager; | |
| 78 | + } else { | |
| 79 | + return new DelegatingDefaultFocusManager(manager); | |
| 80 | + } | |
| 81 | + } | |
| 82 | + | |
| 83 | + /** | |
| 84 | + * Sets the current <code>KeyboardFocusManager</code> instance | |
| 85 | + * for the calling thread's context. If <code>null</code> is | |
| 86 | + * specified, then the current <code>KeyboardFocusManager</code> | |
| 87 | + * is replaced with a new instance of | |
| 88 | + * <code>DefaultKeyboardFocusManager</code>. | |
| 89 | + * <p> | |
| 90 | + * If a <code>SecurityManager</code> is installed, | |
| 91 | + * the calling thread must be granted the <code>AWTPermission</code> | |
| 92 | + * "replaceKeyboardFocusManager" in order to replace the | |
| 93 | + * the current <code>KeyboardFocusManager</code>. | |
| 94 | + * If this permission is not granted, | |
| 95 | + * this method will throw a <code>SecurityException</code>, | |
| 96 | + * and the current <code>KeyboardFocusManager</code> will be unchanged. | |
| 97 | + * | |
| 98 | + * @param aFocusManager the new <code>KeyboardFocusManager</code> | |
| 99 | + * for this thread's context | |
| 100 | + * @see #getCurrentManager | |
| 101 | + * @see java.awt.DefaultKeyboardFocusManager | |
| 102 | + * @throws SecurityException if the calling thread does not have permission | |
| 103 | + * to replace the current <code>KeyboardFocusManager</code> | |
| 104 | + */ | |
| 105 | + public static void setCurrentManager(FocusManager aFocusManager) | |
| 106 | + throws SecurityException | |
| 107 | + { | |
| 108 | + // Note: This method is not backward-compatible with 1.3 and earlier | |
| 109 | + // releases. It now throws a SecurityException in an applet, whereas | |
| 110 | + // in previous releases, it did not. This issue was discussed at | |
| 111 | + // length, and ultimately approved by Hans. | |
| 112 | + KeyboardFocusManager toSet = | |
| 113 | + (aFocusManager instanceof DelegatingDefaultFocusManager) | |
| 114 | + ? ((DelegatingDefaultFocusManager)aFocusManager).getDelegate() | |
| 115 | + : aFocusManager; | |
| 116 | + KeyboardFocusManager.setCurrentKeyboardFocusManager(toSet); | |
| 117 | + } | |
| 118 | + | |
| 119 | + /** | |
| 120 | + * Changes the current <code>KeyboardFocusManager</code>'s default | |
| 121 | + * <code>FocusTraversalPolicy</code> to | |
| 122 | + * <code>DefaultFocusTraversalPolicy</code>. | |
| 123 | + * | |
| 124 | + * @see java.awt.DefaultFocusTraversalPolicy | |
| 125 | + * @see java.awt.KeyboardFocusManager#setDefaultFocusTraversalPolicy | |
| 126 | + * @deprecated as of 1.4, replaced by | |
| 127 | + * <code>KeyboardFocusManager.setDefaultFocusTraversalPolicy(FocusTraversalPolicy)</code> | |
| 128 | + */ | |
| 129 | + @Deprecated | |
| 130 | + public static void disableSwingFocusManager() { | |
| 131 | + if (enabled) { | |
| 132 | + enabled = false; | |
| 133 | + KeyboardFocusManager.getCurrentKeyboardFocusManager(). | |
| 134 | + setDefaultFocusTraversalPolicy( | |
| 135 | + new DefaultFocusTraversalPolicy()); | |
| 136 | + } | |
| 137 | + } | |
| 138 | + | |
| 139 | + /** | |
| 140 | + * Returns whether the application has invoked | |
| 141 | + * <code>disableSwingFocusManager()</code>. | |
| 142 | + * | |
| 143 | + * @see #disableSwingFocusManager | |
| 144 | + * @deprecated As of 1.4, replaced by | |
| 145 | + * <code>KeyboardFocusManager.getDefaultFocusTraversalPolicy()</code> | |
| 146 | + */ | |
| 147 | + @Deprecated | |
| 148 | + public static boolean isFocusManagerEnabled() { | |
| 149 | + return enabled; | |
| 150 | + } | |
| 151 | +} | |