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Java Source | 1997-07-30 | 4.1 KB | 123 lines |
- // $Header: z:/admin/metro_examples/java/demo/ImageMap/rcs/SoundArea.java 1.1 1997/02/06 00:30:12 IPGIntel-2 Exp $
- /*
- * @(#)SoundArea.java 1.7 96/12/06
- *
- * Copyright (c) 1994-1996 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
- * modify and redistribute this software in source and binary code form,
- * provided that i) this copyright notice and license appear on all copies of
- * the software; and ii) Licensee does not utilize the software in a manner
- * which is disparaging to Sun.
- *
- * 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 SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
- * OR DISTRIBUTING 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.
- *
- * This software is not designed or intended for use in on-line control of
- * aircraft, air traffic, aircraft navigation or aircraft communications; or in
- * the design, construction, operation or maintenance of any nuclear
- * facility. Licensee represents and warrants that it will not use or
- * redistribute the Software for such purposes.
- */
-
- 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 1.7, 12/06/96
- */
- 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
- }
- }
- }
-