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- /*
- * @(#)SoundArea.java 1.3 95/10/13
- *
- * Copyright (c) 1994-1995 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;
-
- /**
- * An audio feedback ImageArea class.
- * This class extends the basic ImageArea Class to play a sound when
- * the user enters the area.
- *
- * @author Jim Graham
- * @author Chuck McManis
- * @version 1.3, 10/13/95
- */
- class SoundArea extends ImageMapArea {
- /** The URL of the sound to be played. */
- URL sound;
- AudioClip soundData = null;
- boolean hasPlayed;
- boolean isReady = false;
- long lastExit = 0;
- final static int HYSTERESIS = 1500;
-
- /**
- * The argument is the URL of the sound to be played.
- */
- public void handleArg(String arg) {
- try {
- sound = new URL(parent.getDocumentBase(), arg);
- } catch (MalformedURLException e) {
- sound = null;
- }
- hasPlayed = false;
- }
-
- /**
- * The applet thread calls the getMedia() method when the applet
- * is started.
- */
- public void getMedia() {
- if (sound != null) {
- soundData = parent.getAudioClip(sound);
- }
- if (soundData == null) {
- System.out.println("SoundArea: Unable to load data "+sound);
- }
- isReady = true;
- }
-
- /**
- * The enter method is called when the mouse enters the area.
- * The sound is played if the mouse has been outside of the
- * area for more then the delay indicated by HYSTERESIS.
- */
- public boolean enter() {
- // is the sound sample loaded?
- if (! isReady) {
- parent.showStatus("Loading media file...");
- return false;
- }
-
- /*
- * So we entered the selection region, play the sound if
- * we need to. Track the mouse entering and exiting the
- * the selection box. If it doesn't stay out for more than
- * "HYSTERESIS" millis, then don't re-play the sound.
- */
- long now = System.currentTimeMillis();
- if (Math.abs(now - lastExit) < HYSTERESIS) {
- // if within the window pretend that it was played.
- hasPlayed = true;
- return false;
- }
-
- // Else play the sound.
- if (! hasPlayed && (soundData != null)) {
- hasPlayed = true;
- soundData.play();
- }
-
- return false;
- }
-
- /**
- * The exit method is called when the mouse leaves the area.
- */
- public void exit() {
- if (hasPlayed) {
- hasPlayed = false;
- lastExit = System.currentTimeMillis(); // note the time of exit
- }
- }
- }
-