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package javax.swing;

import javax.swing.event.*;
import java.util.EventObject;
import java.io.Serializable;

A base class for CellEditors, providing default implementations for the methods in the CellEditor interface except getCellEditorValue(). Like the other abstract implementations in Swing, also manages a list of listeners.

Warning: 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™ has been added to the java.beans package. Please see XMLEncoder.

Author:Philip Milne
Since:1.3
/** * * 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&trade; * has been added to the <code>java.beans</code> package. * Please see {@link java.beans.XMLEncoder}. * * @author Philip Milne * @since 1.3 */
@SuppressWarnings("serial") // Same-version serialization only public abstract class AbstractCellEditor implements CellEditor, Serializable {
The list of listeners.
/** * The list of listeners. */
protected EventListenerList listenerList = new EventListenerList();
The change event.
/** * The change event. */
protected transient ChangeEvent changeEvent = null; // Force this to be implemented. // public Object getCellEditorValue()
Returns true.
Params:
  • e – an event object
Returns:true
/** * Returns true. * @param e an event object * @return true */
public boolean isCellEditable(EventObject e) { return true; }
Returns true.
Params:
  • anEvent – an event object
Returns:true
/** * Returns true. * @param anEvent an event object * @return true */
public boolean shouldSelectCell(EventObject anEvent) { return true; }
Calls fireEditingStopped and returns true.
Returns:true
/** * Calls <code>fireEditingStopped</code> and returns true. * @return true */
public boolean stopCellEditing() { fireEditingStopped(); return true; }
Calls fireEditingCanceled.
/** * Calls <code>fireEditingCanceled</code>. */
public void cancelCellEditing() { fireEditingCanceled(); }
Adds a CellEditorListener to the listener list.
Params:
  • l – the new listener to be added
/** * 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 CellEditorListener from the listener list.
Params:
  • l – the listener to be removed
/** * 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 CellEditorListeners added to this AbstractCellEditor with addCellEditorListener().
Returns:all of the CellEditorListeners added or an empty array if no listeners have been added
Since:1.4
/** * 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 listenerList.getListeners(CellEditorListener.class); }
Notifies all listeners that have registered interest for notification on this event type. The event instance is created lazily.
See Also:
  • EventListenerList
/** * 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 Also:
  • EventListenerList
/** * 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); } } } }