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Java > Open Source Codes > java2d > demos > Colors > BullsEye


1 /*
2  * @(#)BullsEye.java 1.20 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  * @(#)BullsEye.java 1.20 06/08/29
39  */

40
41 package java2d.demos.Colors;
42
43 import static java.awt.Color JavaDoc.*;
44 import java.awt.*;
45 import java.awt.geom.Ellipse2D JavaDoc;
46 import java2d.Surface;
47
48
49 /**
50  * Creating colors with an alpha value.
51  */

52 public class BullsEye extends Surface {
53
54
55     public BullsEye() {
56         setBackground(WHITE);
57     }
58
59
60     public void render(int w, int h, Graphics2D g2) {
61
62         Color JavaDoc reds[] = { RED.darker(), RED };
63         for (int N = 0; N < 18; N++) {
64             float i = (N + 2) / 2.0f;
65             float x = (float) (5+i*(w/2/10));
66             float y = (float) (5+i*(h/2/10));
67             float ew = (w-10)-(i*w/10);
68             float eh = (h-10)-(i*h/10);
69             float alpha = (N == 0) ? 0.1f : 1.0f / (19.0f - N);
70             if ( N >= 16 )
71                 g2.setColor(reds[N-16]);
72             else
73                 g2.setColor(new Color JavaDoc(0f, 0f, 0f, alpha));
74             g2.fill(new Ellipse2D.Float JavaDoc(x,y,ew,eh));
75         }
76     }
77
78
79     public static void main(String JavaDoc s[]) {
80         createDemoFrame(new BullsEye());
81     }
82 }
83
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