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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 | } | ||