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/* * @(#)AbstractCellEditor.java 1.13 06/04/07 * * Copyright 2006 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ package javax.swing; import javax.swing.event.*; import java.util.EventObject; import java.io.Serializable; /** * @version 1.13 04/07/06 * * A base class for <code>CellEditors</code>, providing default * implementations for the methods in the <code>CellEditor</code> * interface except <code>getCellEditorValue()</code>. * Like the other abstract implementations in Swing, also manages a list * of listeners. * * <p> * <strong>Warning:</strong> * Serialized objects of this class will not be compatible with * future Swing releases. The current serialization support is * appropriate for short term storage or RMI between applications running * the same version of Swing. As of 1.4, support for long term storage * of all JavaBeans<sup><font size="-2">TM</font></sup> * has been added to the <code>java.beans</code> package. * Please see {@link java.beans.XMLEncoder}. * * @author Philip Milne * @since 1.3 */ public abstract class AbstractCellEditor implements CellEditor, Serializable { protected EventListenerList listenerList = new EventListenerList(); transient protected ChangeEvent changeEvent = null; // Force this to be implemented. // public Object getCellEditorValue() /** * Returns true. * @param e an event object * @return true */ public boolean isCellEditable(EventObject e) { return true; } /** * Returns true. * @param anEvent an event object * @return true */ public boolean shouldSelectCell(EventObject anEvent) { return true; } /** * Calls <code>fireEditingStopped</code> and returns true. * @return true */ public boolean stopCellEditing() { fireEditingStopped(); return true; } /** * Calls <code>fireEditingCanceled</code>. */ public void cancelCellEditing() { fireEditingCanceled(); } /** * Adds a <code>CellEditorListener</code> to the listener list. * @param l the new listener to be added */ public void addCellEditorListener(CellEditorListener l) { listenerList.add(CellEditorListener.class, l); } /** * Removes a <code>CellEditorListener</code> from the listener list. * @param l the listener to be removed */ public void removeCellEditorListener(CellEditorListener l) { listenerList.remove(CellEditorListener.class, l); } /** * Returns an array of all the <code>CellEditorListener</code>s added * to this AbstractCellEditor with addCellEditorListener(). * * @return all of the <code>CellEditorListener</code>s added or an empty * array if no listeners have been added * @since 1.4 */ public CellEditorListener[] getCellEditorListeners() { return (CellEditorListener[])listenerList.getListeners( CellEditorListener.class); } /** * Notifies all listeners that have registered interest for * notification on this event type. The event instance * is created lazily. * * @see EventListenerList */ protected void fireEditingStopped() { // Guaranteed to return a non-null array Object[] listeners = listenerList.getListenerList(); // Process the listeners last to first, notifying // those that are interested in this event for (int i = listeners.length-2; i>=0; i-=2) { if (listeners[i]==CellEditorListener.class) { // Lazily create the event: if (changeEvent == null) changeEvent = new ChangeEvent(this); ((CellEditorListener)listeners[i+1]).editingStopped(changeEvent); } } } /** * Notifies all listeners that have registered interest for * notification on this event type. The event instance * is created lazily. * * @see EventListenerList */ protected void fireEditingCanceled() { // Guaranteed to return a non-null array Object[] listeners = listenerList.getListenerList(); // Process the listeners last to first, notifying // those that are interested in this event for (int i = listeners.length-2; i>=0; i-=2) { if (listeners[i]==CellEditorListener.class) { // Lazily create the event: if (changeEvent == null) changeEvent = new ChangeEvent(this); ((CellEditorListener)listeners[i+1]).editingCanceled(changeEvent); } } } }