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.
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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
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30  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32 package java2d.demos.Paths;
33 
34 
35 import static java.awt.Color.BLACK;
36 import static java.awt.Color.LIGHT_GRAY;
37 import static java.awt.Color.WHITE;
38 import java.awt.Graphics2D;
39 import java.awt.geom.GeneralPath;
40 import java.awt.geom.Path2D;
41 import java2d.Surface;
42 
43 
44 /**
45  * Rectangles filled to illustrate the GenerPath winding rule, determining
46  * the interior of a path.
47  */
48 @SuppressWarnings("serial")
49 public class WindingRule extends Surface {
50 
WindingRule()51     public WindingRule() {
52         setBackground(WHITE);
53     }
54 
55     @Override
render(int w, int h, Graphics2D g2)56     public void render(int w, int h, Graphics2D g2) {
57 
58         g2.translate(w * .2, h * .2);
59 
60         GeneralPath p = new GeneralPath(Path2D.WIND_NON_ZERO);
61         p.moveTo(0.0f, 0.0f);
62         p.lineTo(w * .5f, 0.0f);
63         p.lineTo(w * .5f, h * .2f);
64         p.lineTo(0.0f, h * .2f);
65         p.closePath();
66 
67         p.moveTo(w * .05f, h * .05f);
68         p.lineTo(w * .55f, h * .05f);
69         p.lineTo(w * .55f, h * .25f);
70         p.lineTo(w * .05f, h * .25f);
71         p.closePath();
72 
73         g2.setColor(LIGHT_GRAY);
74         g2.fill(p);
75         g2.setColor(BLACK);
76         g2.draw(p);
77         g2.drawString("NON_ZERO rule", 0, -5);
78 
79         g2.translate(0.0f, h * .45);
80 
81         p.setWindingRule(Path2D.WIND_EVEN_ODD);
82         g2.setColor(LIGHT_GRAY);
83         g2.fill(p);
84         g2.setColor(BLACK);
85         g2.draw(p);
86         g2.drawString("EVEN_ODD rule", 0, -5);
87     }
88 
main(String[] s)89     public static void main(String[] s) {
90         createDemoFrame(new WindingRule());
91     }
92 }
93