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
  24  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  27  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  28  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  29  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  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 
  51     public WindingRule() {
  52         setBackground(WHITE);
  53     }
  54 
  55     @Override
  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 
  89     public static void main(String[] s) {
  90         createDemoFrame(new WindingRule());
  91     }
  92 }