1 /*
2 *
3 * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * - Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * - Neither the name of Oracle nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
21 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
36 import static java.awt.Color.WHITE;
37 import java.awt.Color;
38 import java.awt.Graphics2D;
39 import java.awt.geom.Ellipse2D;
40 import java2d.Surface;
41
42
43 /**
44 * Creating colors with an alpha value.
45 */
46 @SuppressWarnings("serial")
47 public class BullsEye extends Surface {
48
49 public BullsEye() {
50 setBackground(WHITE);
51 }
52
53 @Override
54 public void render(int w, int h, Graphics2D g2) {
55
56 Color reds[] = { RED.darker(), RED };
57 for (int N = 0; N < 18; N++) {
58 float i = (N + 2) / 2.0f;
59 float x = (5 + i * (w / 2 / 10));
60 float y = (5 + i * (h / 2 / 10));
61 float ew = (w - 10) - (i * w / 10);
62 float eh = (h - 10) - (i * h / 10);
63 float alpha = (N == 0) ? 0.1f : 1.0f / (19.0f - N);
64 if (N >= 16) {
65 g2.setColor(reds[N - 16]);
66 } else {
67 g2.setColor(new Color(0f, 0f, 0f, alpha));
68 }
69 g2.fill(new Ellipse2D.Float(x, y, ew, eh));
70 }
71 }
72
73 public static void main(String s[]) {
74 createDemoFrame(new BullsEye());
75 }
76 }
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1 /*
2 *
3 * Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * - Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * - Neither the name of Oracle nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
21 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
36 import static java.awt.Color.WHITE;
37 import java.awt.Color;
38 import java.awt.Graphics2D;
39 import java.awt.geom.Ellipse2D;
40 import java2d.Surface;
41
42
43 /**
44 * Creating colors with an alpha value.
45 */
46 @SuppressWarnings("serial")
47 public class BullsEye extends Surface {
48
49 public BullsEye() {
50 setBackground(WHITE);
51 }
52
53 @Override
54 public void render(int w, int h, Graphics2D g2) {
55
56 Color[] reds = { RED.darker(), RED };
57 for (int N = 0; N < 18; N++) {
58 float i = (N + 2) / 2.0f;
59 float x = (5 + i * (w / 2 / 10));
60 float y = (5 + i * (h / 2 / 10));
61 float ew = (w - 10) - (i * w / 10);
62 float eh = (h - 10) - (i * h / 10);
63 float alpha = (N == 0) ? 0.1f : 1.0f / (19.0f - N);
64 if (N >= 16) {
65 g2.setColor(reds[N - 16]);
66 } else {
67 g2.setColor(new Color(0f, 0f, 0f, alpha));
68 }
69 g2.fill(new Ellipse2D.Float(x, y, ew, eh));
70 }
71 }
72
73 public static void main(String[] s) {
74 createDemoFrame(new BullsEye());
75 }
76 }
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