/*
 * @(#)DelayedSoundArea.java	1.5 96/04/24  
 *
 * Copyright (c) 1994-1996 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Permission to use, copy, modify, and distribute this software
 * and its documentation for NON-COMMERCIAL or COMMERCIAL purposes and
 * without fee is hereby granted. 
 * Please refer to the file http://java.sun.com/copy_trademarks.html
 * for further important copyright and trademark information and to
 * http://java.sun.com/licensing.html for further important licensing
 * information for the Java (tm) Technology.
 * 
 * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
 * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
 * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
 * 
 * THIS SOFTWARE IS NOT DESIGNED OR INTENDED FOR USE OR RESALE AS ON-LINE
 * CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING FAIL-SAFE
 * PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES, AIRCRAFT
 * NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL, DIRECT LIFE
 * SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH THE FAILURE OF THE
 * SOFTWARE COULD LEAD DIRECTLY TO DEATH, PERSONAL INJURY, OR SEVERE
 * PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH RISK ACTIVITIES").  SUN
 * SPECIFICALLY DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR
 * HIGH RISK ACTIVITIES.
 */

import java.awt.Graphics;
import java.applet.AudioClip;
import java.net.URL;
import java.net.MalformedURLException;
import java.util.StringTokenizer;

/**
 * This ImageArea Class will play a sound each time the user enters the 
 * area. It is different from SoundArea in that it accepts a delay (in 
 * tenths of a second) before it plays the sound. If the mouse leaves
 * the area before the time delay, the sound is not played.
 *
 * This allows you to have one piece of audio when the button is "hit"
 * via SoundArea and another if the user stays on the button.
 *
 * @author 	Chuck McManis
 * @version 	1.5, 04/24/96
 */
class DelayedSoundArea extends ImageMapArea {
    /** The URL of the sound to be played. */
    URL 	sound;
    AudioClip	soundData;
    boolean 	hasPlayed; 
    int	    	delay;
    int		countDown;

    /**
     * The argument is the URL of the sound to be played.
     * This method also sets this type of area to be non-terminal.
     */
    public void handleArg(String arg) {
	Thread soundLoader;
	StringTokenizer st = new StringTokenizer(arg, ", ");
	
	delay = Integer.parseInt(st.nextToken());
	try {
	    sound = new URL(parent.getDocumentBase(), st.nextToken());
	} catch (MalformedURLException e) {
	    sound = null;
	}
    }

    public void getMedia() {
	if (sound != null) {
	    soundData = parent.getAudioClip(sound);
	}
	if (soundData == null) {
	    System.out.println("DelayedSoundArea: Unable to load data "+sound);
	}
    }

    /**
     * The highlight method plays the sound in addition to the usual
     * graphical highlight feedback.
     */
    public void enter() {
	hasPlayed = false;
	countDown = delay;
	parent.startAnimation();
    }

    /**
     * This method is called every animation cycle if there are any
     * active animating areas.
     * @return true if this area requires further animation notifications
     */
    public boolean animate() {
	if (entered && ! hasPlayed) {
	    if (countDown > 0) {
		countDown--;
		return true;
	    }
	    hasPlayed = true;
	    if (soundData != null) {
	        soundData.play();
	    }
	}
	return false;
    }
}