/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 * Port to the D programming language:
 *     Frank Benoit <benoit@tionex.de>
 *******************************************************************************/
module dwtx.draw2d.FocusListener;

import dwt.dwthelper.utils;
import dwtx.draw2d.FocusEvent;

/**
 * A listener interface for receiving {@link FocusEvent FocusEvents}.
 */
public interface FocusListener {

/**
 * Called when the listened to object has gained focus.
 * @param fe The FocusEvent object
 */
void focusGained(FocusEvent fe);

/**
 * Called when the listened to object has lost focus.
 * @param fe The FocusEvent object
 */
void focusLost(FocusEvent fe);

/**
 * An empty implementation of FocusListener for convenience.
 */
public class Stub
    : FocusListener
{
    /**
     * @see dwtx.draw2d.FocusListener#focusGained(FocusEvent)
     */
    public void focusGained(FocusEvent fe) { }
    /**
     * @see dwtx.draw2d.FocusListener#focusLost(FocusEvent)
     */
    public void focusLost(FocusEvent fe) { }
}

}