Showing the changes to java/pkg/sun/swing/UIAction.java (1 of 18352 files). Show all
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| 1 | +/* | |
| 2 | + * Copyright (c) 2003, 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 sun.swing; | |
| 26 | + | |
| 27 | +import java.beans.PropertyChangeListener; | |
| 28 | + | |
| 29 | +import javax.swing.Action; | |
| 30 | + | |
| 31 | +/** | |
| 32 | + * UIAction is the basis of all of basic's action classes that are used in | |
| 33 | + * an ActionMap. Subclasses need to override <code>actionPerformed</code>. | |
| 34 | + * <p> | |
| 35 | + * A typical subclass will look like: | |
| 36 | + * <pre> | |
| 37 | + * private static class Actions extends UIAction { | |
| 38 | + * Actions(String name) { | |
| 39 | + * super(name); | |
| 40 | + * } | |
| 41 | + * | |
| 42 | + * public void actionPerformed(ActionEvent ae) { | |
| 43 | + * if (getName() == "selectAll") { | |
| 44 | + * selectAll(); | |
| 45 | + * } | |
| 46 | + * else if (getName() == "cancelEditing") { | |
| 47 | + * cancelEditing(); | |
| 48 | + * } | |
| 49 | + * } | |
| 50 | + * } | |
| 51 | + * </pre> | |
| 52 | + * <p> | |
| 53 | + * Subclasses that wish to conditionalize the enabled state should override | |
| 54 | + * <code>isEnabled(Component)</code>, and be aware that the passed in | |
| 55 | + * <code>Component</code> may be null. | |
| 56 | + * | |
| 57 | + * @see com.sun.java.swing.ExtendedAction | |
| 58 | + * @see javax.swing.Action | |
| 59 | + * @author Scott Violet | |
| 60 | + */ | |
| 61 | +public abstract class UIAction implements Action { | |
| 62 | + private String name; | |
| 63 | + | |
| 64 | + public UIAction(String name) { | |
| 65 | + this.name = name; | |
| 66 | + } | |
| 67 | + | |
| 68 | + public final String getName() { | |
| 69 | + return name; | |
| 70 | + } | |
| 71 | + | |
| 72 | + public Object getValue(String key) { | |
| 73 | + if (key == NAME) { | |
| 74 | + return name; | |
| 75 | + } | |
| 76 | + return null; | |
| 77 | + } | |
| 78 | + | |
| 79 | + // UIAction is not mutable, this does nothing. | |
| 80 | + public void putValue(String key, Object value) { | |
| 81 | + } | |
| 82 | + | |
| 83 | + // UIAction is not mutable, this does nothing. | |
| 84 | + public void setEnabled(boolean b) { | |
| 85 | + } | |
| 86 | + | |
| 87 | + /** | |
| 88 | + * Cover method for <code>isEnabled(null)</code>. | |
| 89 | + */ | |
| 90 | + public final boolean isEnabled() { | |
| 91 | + return isEnabled(null); | |
| 92 | + } | |
| 93 | + | |
| 94 | + /** | |
| 95 | + * Subclasses that need to conditionalize the enabled state should | |
| 96 | + * override this. Be aware that <code>sender</code> may be null. | |
| 97 | + * | |
| 98 | + * @param sender Widget enabled state is being asked for, may be null. | |
| 99 | + */ | |
| 100 | + public boolean isEnabled(Object sender) { | |
| 101 | + return true; | |
| 102 | + } | |
| 103 | + | |
| 104 | + // UIAction is not mutable, this does nothing. | |
| 105 | + public void addPropertyChangeListener(PropertyChangeListener listener) { | |
| 106 | + } | |
| 107 | + | |
| 108 | + // UIAction is not mutable, this does nothing. | |
| 109 | + public void removePropertyChangeListener(PropertyChangeListener listener) { | |
| 110 | + } | |
| 111 | +} | |