/*
 *                 Sun Public License Notice
 *
 * The contents of this file are subject to the Sun Public License
 * Version 1.0 (the "License"). You may not use this file except in
 * compliance with the License. A copy of the License is available at
 * http://www.sun.com/
 *
 * The Original Code is NetBeans. The Initial Developer of the Original
 * Code is Sun Microsystems, Inc. Portions Copyright 1997-2003 Sun
 * Microsystems, Inc. All Rights Reserved.
 */

/*
 * this file is derived from the "Creating TreeTable" article at
 * http://java.sun.com/products/jfc/tsc/articles/treetable2/index.html
 */
package org.netbeans.modules.tasklist.compiler.treetable;

import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.util.EventObject;

/**
 * Abstract cell editor. Implement all abstract methods of CellEditor.
 */
public class AbstractCellEditor implements CellEditor {
    /** CellEditorListener[] */
    protected EventListenerList listenerList = new EventListenerList();
    
    public Object getCellEditorValue() { return null; }
    public boolean isCellEditable(EventObject e) { return true; }
    public boolean shouldSelectCell(EventObject anEvent) { return false; }
    public boolean stopCellEditing() { return true; }
    public void cancelCellEditing() {}
    
    public void addCellEditorListener(CellEditorListener l) {
        listenerList.add(CellEditorListener.class, l);
    }
    
    public void removeCellEditorListener(CellEditorListener l) {
        listenerList.remove(CellEditorListener.class, l);
    }
    
    /**
     * Notify all listeners that have registered interest for
     * notification on this event type.
     * @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) {
                ((CellEditorListener)listeners[i+1]).editingStopped(
                    new ChangeEvent(this));
            }
        }
    }
    
    /**
     * Notify all listeners that have registered interest for
     * notification on this event type.
     * @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) {
                ((CellEditorListener)listeners[i+1]).editingCanceled(
                    new ChangeEvent(this));
            }
        }
    }
}