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

    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 }