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Java Source | 2002-09-06 | 4.1 KB | 131 lines |
- /*
- * Copyright (c) 2002 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * -Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * -Redistribution in binary form must reproduct the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the distribution.
- *
- * Neither the name of Sun Microsystems, Inc. or the names of contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
- * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
- * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT
- * BE LIABLE FOR ANY DAMAGES OR LIABILITIES SUFFERED BY LICENSEE AS A RESULT
- * OF OR RELATING TO USE, MODIFICATION OR DISTRIBUTION OF THE SOFTWARE OR ITS
- * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
- * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
- * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
- * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE SOFTWARE, EVEN
- * IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- *
- * You acknowledge that Software is not designed, licensed or intended for
- * use in the design, construction, operation or maintenance of any nuclear
- * facility.
- */
-
- /*
- * @(#)SoundArea.java 1.12 02/06/13
- */
-
- 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 1.12, 06/13/02
- */
- 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 == 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 void enter() {
- // is the sound sample loaded?
- if (! isReady) {
- parent.showStatus("Loading media file...");
- return;
- }
-
- /*
- * 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;
- }
-
- // Else play the sound.
- if (! hasPlayed && (soundData != null)) {
- hasPlayed = true;
- soundData.play();
- }
- }
-
- /**
- * 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
- }
- }
- }
-