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| 1 | /* | ||
| 2 | * Copyright (c) 1999, 2008, 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 | |||
| 26 | package javax.swing; | ||
| 27 | |||
| 28 | import javax.swing.event.*; | ||
| 29 | import java.util.EventObject; | ||
| 30 | import java.io.Serializable; | ||
| 31 | |||
| 32 | /** | ||
| 33 | * | ||
| 34 | * A base class for <code>CellEditors</code>, providing default | ||
| 35 | * implementations for the methods in the <code>CellEditor</code> | ||
| 36 | * interface except <code>getCellEditorValue()</code>. | ||
| 37 | * Like the other abstract implementations in Swing, also manages a list | ||
| 38 | * of listeners. | ||
| 39 | * | ||
| 40 | * <p> | ||
| 41 | * <strong>Warning:</strong> | ||
| 42 | * Serialized objects of this class will not be compatible with | ||
| 43 | * future Swing releases. The current serialization support is | ||
| 44 | * appropriate for short term storage or RMI between applications running | ||
| 45 | * the same version of Swing. As of 1.4, support for long term storage | ||
| 46 | * of all JavaBeans<sup><font size="-2">TM</font></sup> | ||
| 47 | * has been added to the <code>java.beans</code> package. | ||
| 48 | * Please see {@link java.beans.XMLEncoder}. | ||
| 49 | * | ||
| 50 | * @author Philip Milne | ||
| 51 | * @since 1.3 | ||
| 52 | */ | ||
| 53 | |||
| 54 | public abstract class AbstractCellEditor implements CellEditor, Serializable { | ||
| 55 | |||
| 56 | protected EventListenerList listenerList = new EventListenerList(); | ||
| 57 | transient protected ChangeEvent changeEvent = null; | ||
| 58 | |||
| 59 | // Force this to be implemented. | ||
| 60 | // public Object getCellEditorValue() | ||
| 61 | |||
| 62 | /** | ||
| 63 | * Returns true. | ||
| 64 | * @param e an event object | ||
| 65 | * @return true | ||
| 66 | */ | ||
| 67 | public boolean isCellEditable(EventObject e) { | ||
| 68 | return true; | ||
| 69 | } | ||
| 70 | |||
| 71 | /** | ||
| 72 | * Returns true. | ||
| 73 | * @param anEvent an event object | ||
| 74 | * @return true | ||
| 75 | */ | ||
| 76 | public boolean shouldSelectCell(EventObject anEvent) { | ||
| 77 | return true; | ||
| 78 | } | ||
| 79 | |||
| 80 | /** | ||
| 81 | * Calls <code>fireEditingStopped</code> and returns true. | ||
| 82 | * @return true | ||
| 83 | */ | ||
| 84 | public boolean stopCellEditing() { | ||
| 85 | fireEditingStopped(); | ||
| 86 | return true; | ||
| 87 | } | ||
| 88 | |||
| 89 | /** | ||
| 90 | * Calls <code>fireEditingCanceled</code>. | ||
| 91 | */ | ||
| 92 | public void cancelCellEditing() { | ||
| 93 | fireEditingCanceled(); | ||
| 94 | } | ||
| 95 | |||
| 96 | /** | ||
| 97 | * Adds a <code>CellEditorListener</code> to the listener list. | ||
| 98 | * @param l the new listener to be added | ||
| 99 | */ | ||
| 100 | public void addCellEditorListener(CellEditorListener l) { | ||
| 101 | listenerList.add(CellEditorListener.class, l); | ||
| 102 | } | ||
| 103 | |||
| 104 | /** | ||
| 105 | * Removes a <code>CellEditorListener</code> from the listener list. | ||
| 106 | * @param l the listener to be removed | ||
| 107 | */ | ||
| 108 | public void removeCellEditorListener(CellEditorListener l) { | ||
| 109 | listenerList.remove(CellEditorListener.class, l); | ||
| 110 | } | ||
| 111 | |||
| 112 | /** | ||
| 113 | * Returns an array of all the <code>CellEditorListener</code>s added | ||
| 114 | * to this AbstractCellEditor with addCellEditorListener(). | ||
| 115 | * | ||
| 116 | * @return all of the <code>CellEditorListener</code>s added or an empty | ||
| 117 | * array if no listeners have been added | ||
| 118 | * @since 1.4 | ||
| 119 | */ | ||
| 120 | public CellEditorListener[] getCellEditorListeners() { | ||
| 121 | return listenerList.getListeners(CellEditorListener.class); | ||
| 122 | } | ||
| 123 | |||
| 124 | /** | ||
| 125 | * Notifies all listeners that have registered interest for | ||
| 126 | * notification on this event type. The event instance | ||
| 127 | * is created lazily. | ||
| 128 | * | ||
| 129 | * @see EventListenerList | ||
| 130 | */ | ||
| 131 | protected void fireEditingStopped() { | ||
| 132 | // Guaranteed to return a non-null array | ||
| 133 | Object[] listeners = listenerList.getListenerList(); | ||
| 134 | // Process the listeners last to first, notifying | ||
| 135 | // those that are interested in this event | ||
| 136 | for (int i = listeners.length-2; i>=0; i-=2) { | ||
| 137 | if (listeners[i]==CellEditorListener.class) { | ||
| 138 | // Lazily create the event: | ||
| 139 | if (changeEvent == null) | ||
| 140 | changeEvent = new ChangeEvent(this); | ||
| 141 | ((CellEditorListener)listeners[i+1]).editingStopped(changeEvent); | ||
| 142 | } | ||
| 143 | } | ||
| 144 | } | ||
| 145 | |||
| 146 | /** | ||
| 147 | * Notifies all listeners that have registered interest for | ||
| 148 | * notification on this event type. The event instance | ||
| 149 | * is created lazily. | ||
| 150 | * | ||
| 151 | * @see EventListenerList | ||
| 152 | */ | ||
| 153 | protected void fireEditingCanceled() { | ||
| 154 | // Guaranteed to return a non-null array | ||
| 155 | Object[] listeners = listenerList.getListenerList(); | ||
| 156 | // Process the listeners last to first, notifying | ||
| 157 | // those that are interested in this event | ||
| 158 | for (int i = listeners.length-2; i>=0; i-=2) { | ||
| 159 | if (listeners[i]==CellEditorListener.class) { | ||
| 160 | // Lazily create the event: | ||
| 161 | if (changeEvent == null) | ||
| 162 | changeEvent = new ChangeEvent(this); | ||
| 163 | ((CellEditorListener)listeners[i+1]).editingCanceled(changeEvent); | ||
| 164 | } | ||
| 165 | } | ||
| 166 | } | ||
| 167 | } | ||