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Java > Open Source Codes > java2d > DemoImages


1 /*
2  * @(#)DemoImages.java 1.21 06/08/29
3  *
4  * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions are met:
8  *
9  * -Redistribution of source code must retain the above copyright notice, this
10  * list of conditions and the following disclaimer.
11  *
12  * -Redistribution in binary form must reproduce the above copyright notice,
13  * this list of conditions and the following disclaimer in the documentation
14  * and/or other materials provided with the distribution.
15  *
16  * Neither the name of Sun Microsystems, Inc. or the names of contributors may
17  * be used to endorse or promote products derived from this software without
18  * specific prior written permission.
19  *
20  * This software is provided "AS IS," without a warranty of any kind. ALL
21  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
22  * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
23  * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
24  * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
25  * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
26  * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
27  * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
28  * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
29  * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
30  * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
31  *
32  * You acknowledge that this software is not designed, licensed or intended
33  * for use in the design, construction, operation or maintenance of any
34  * nuclear facility.
35  */

36
37 /*
38  * @(#)DemoImages.java 1.21 06/08/29
39  */

40
41
42 package java2d;
43
44 import java.awt.*;
45 import java.awt.image.*;
46 import java.util.Map JavaDoc;
47 import java.util.concurrent.ConcurrentHashMap JavaDoc;
48 import java.net.URL JavaDoc;
49 import java.net.URLClassLoader JavaDoc;
50
51
52 /**
53  * A collection of all the demo images found in the images directory.
54  * Certain classes are preloaded; the rest are loaded lazily.
55  */

56 public class DemoImages extends Component {
57
58     private static String JavaDoc[] names =
59     {
60         "java-logo.gif", "bld.jpg", "boat.png", "box.gif",
61         "boxwave.gif", "clouds.jpg", "duke.gif", "duke.running.gif",
62         "dukeplug.gif", "fight.gif", "globe.gif", "java_logo.png",
63         "jumptojavastrip.png", "magnify.gif", "painting.gif",
64         "remove.gif", "snooze.gif", "star7.gif", "surfing.gif",
65         "thumbsup.gif", "tip.gif", "duke.png", "print.gif",
66         "loop.gif", "looping.gif", "start.gif", "start2.gif",
67         "stop.gif", "stop2.gif", "clone.gif"
68     };
69
70     private static Map JavaDoc<String JavaDoc,Image> cache =
71         new ConcurrentHashMap JavaDoc<String JavaDoc,Image>(names.length);
72
73     public DemoImages() {
74         for (String JavaDoc name : names) {
75             cache.put(name, getImage(name, this));
76         }
77     }
78
79
80     /*
81      * Gets the named image using the toolkit of the specified component.
82      * Note that this has to work even before we have had a chance to
83      * instantiate DemoImages and preload the cache.
84      */

85     public static Image getImage(String JavaDoc name, Component cmp) {
86         Image img = null;
87         if (cache != null) {
88             if ((img = cache.get(name)) != null) {
89                 return img;
90             }
91         }
92
93         URLClassLoader JavaDoc urlLoader =
94             (URLClassLoader JavaDoc)cmp.getClass().getClassLoader();
95         URL JavaDoc fileLoc = urlLoader.findResource("images/" + name);
96         img = cmp.getToolkit().createImage(fileLoc);
97
98         MediaTracker tracker = new MediaTracker(cmp);
99         tracker.addImage(img, 0);
100         try {
101             tracker.waitForID(0);
102             if (tracker.isErrorAny()) {
103                 System.out.println("Error loading image " + name);
104             }
105         } catch (Exception JavaDoc ex) { ex.printStackTrace(); }
106         return img;
107     }
108 }
109
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