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/* * @(#)AudioItem.java 1.26f 95/03/22 James Gosling * * Copyright (c) 1994 Sun Microsystems, Inc. All Rights Reserved. * * Permission to use, copy, modify, and distribute this software * and its documentation for NON-COMMERCIAL purposes and without * fee is hereby granted provided that this copyright notice * appears in all copies. Please refer to the file "copyright.html" * for further important copyright and licensing information. * * 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. */ import java.io.InputStream; import java.util.Hashtable; import java.util.Enumeration; import java.util.StringTokenizer; import java.awt.*; import java.net.*; import java.applet.AudioClip; /** * A simple Item class to play an audio clip. * @author James Gosling */ public class AudioItem extends java.applet.Applet { /** * The sounds to be played. */ private String sounds; /** * The index of the next sound in the sounds strings. */ private int index; /** * The currently playing audio stream, or null * when no audio is playing. */ private AudioClip audio; /** * Play the next sound. The sound URLS are obtained * from the "snd" attribute. You can specify a list * of them by seperating the sounds by '|'s.

* Note that the URL is constructed relative to the * getDocumentBase(), that is because the url is obtained * from within the document */ public void next() { try { if (audio != null) { audio.stop(); audio = null; } String url = sounds; if (sounds.indexOf('|') >= 0) { int start = index; if ((index = sounds.indexOf('|', index)) < 0) { url = sounds.substring(start); index = start; } else { url = sounds.substring(start, index++); } } if (url.length() > 0) { audio = getAudioClip(new URL(getDocumentBase(), url)); audio.play(); } } catch(Exception e) { } } /** * Initialize the applet. First resize it, then get the * "snd" attribute. */ public void init() { resize(10, 12); sounds = getParameter("snd"); if (sounds == null) { sounds = "doc:/demo/audio/ding.au"; } } /** * When the applet is started play the next sound. */ public void start() { next(); } /** * When the applet is stopped, stop playing the current sound. */ public void stop() { if (audio != null) { audio.stop(); audio = null; } } /** * When the user clicks in the applet, play the next sound. */ public boolean mouseUp(java.awt.Event evt, int x, int y) { next(); return true; } /** * Paint an audio icon. */ public void paint(Graphics g) { double f = ((double)(size().height - 1)) / ((size().width - 1) * 2); int offset = size().height / 2; for (int i = size().width - 1; i >= 0; i -= 3) { int h = (int)(i * f); g.drawLine(i, offset - h, i, offset + h); } } public String getAppletInfo() { return "Title: AudioItem\nAuthor: James Gosling\nA simple Item class to play an audio clip."; } public String[][] getParameterInfo() { String pinfo[][] = { {"snd", "string", "The sound URL(s).You can specify a list of them by seperating the sounds by '|'s. Note that the URL is constructed relative to the getDocumentBase() because the url is obtained from within the document."} }; return pinfo; } }