/*******************************************************************************
* Copyright (c) 2000, 2003 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
******************************************************************************/
package org.eclipse.swt.events;
import org.eclipse.swt.internal.SWTEventListener;
/**
* Classes which implement this interface provide methods that deal with the
* events that are generated as controls gain and lose focus.
* <p>
* After creating an instance of a class that implements this interface it can
* be added to a control using the <code>addFocusListener</code> method and
* removed using the <code>removeFocusListener</code> method. When a control
* gains or loses focus, the appropriate method will be invoked.
* </p>
*
* @see FocusAdapter
* @see FocusEvent
*/
public interface FocusListener extends SWTEventListener {
/**
* Sent when a control gets focus.
*
* @param event an event containing information about the focus change
*/
public void focusGained( FocusEvent event );
/**
* Sent when a control loses focus.
*
* @param event an event containing information about the focus change
*/
public void focusLost( FocusEvent event );
}