/*
 *                 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 1997-2004 Sun
 * Microsystems, Inc. All Rights Reserved.
 */
package org.netbeans.modules.javacore.internalapi;

import java.util.EventListener;

/** Progress listener. Enables objects to listen to a progress of long operations.
 *
 * @author  Martin Matula
 */
public interface ProgressListener extends EventListener {
    /** Signals that an operation has started.
     * @param event Event object describing this event.
     */
    public void start(ProgressEvent event);

    /** Signals that an operation has progressed.
     * @param event Event object describing this event.
     */
    public void step(ProgressEvent event);

    /** Signals that an operation has finished.
     * @param event Event object describing this event.
     */
    public void stop(ProgressEvent event);
}