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.Arcs_Curves;

    33 

    34 

    35 import java.awt.*;

    36 import java.awt.geom.Arc2D;

    37 import java.awt.geom.AffineTransform;

    38 import java2d.AnimatingSurface;

    39 import static java.awt.Color.*;

    40 

    41 

    42 /**

    43  * Arc2D Open, Chord & Pie arcs; Animated Pie Arc.

    44  */

    45 @SuppressWarnings("serial")

    46 public class Arcs extends AnimatingSurface {

    47 

    48     private static String types[] = { "Arc2D.OPEN", "Arc2D.CHORD", "Arc2D.PIE" };

    49     private static final int CLOSE = 0;

    50     private static final int OPEN = 1;

    51     private static final int FORWARD = 0;

    52     private static final int BACKWARD = 1;

    53     private static final int DOWN = 2;

    54     private static final int UP = 3;

    55     private int aw, ah; // animated arc width & height

    56     private int x, y;

    57     private int angleStart = 45;

    58     private int angleExtent = 270;

    59     private int mouth = CLOSE;

    60     private int direction = FORWARD;

    61 

    62     public Arcs() {

    63         setBackground(WHITE);

    64     }

    65 

    66     @Override

    67     public void reset(int w, int h) {

    68         x = 0;

    69         y = 0;

    70         aw = w / 12;

    71         ah = h / 12;

    72     }

    73 

    74     @Override

    75     public void step(int w, int h) {

    76         // Compute direction

    77         if (x + aw >= w - 5 && direction == FORWARD) {

    78             direction = DOWN;

    79         }

    80         if (y + ah >= h - 5 && direction == DOWN) {

    81             direction = BACKWARD;

    82         }

    83         if (x - aw <= 5 && direction == BACKWARD) {

    84             direction = UP;

    85         }

    86         if (y - ah <= 5 && direction == UP) {

    87             direction = FORWARD;

    88         }

    89 

    90         // compute angle start & extent

    91         if (mouth == CLOSE) {

    92             angleStart -= 5;

    93             angleExtent += 10;

    94         }

    95         if (mouth == OPEN) {

    96             angleStart += 5;

    97             angleExtent -= 10;

    98         }

    99         if (direction == FORWARD) {

   100             x += 5;

   101             y = 0;

   102         }

   103         if (direction == DOWN) {

   104             x = w;

   105             y += 5;

   106         }

   107         if (direction == BACKWARD) {

   108             x -= 5;

   109             y = h;

   110         }

   111         if (direction == UP) {

   112             x = 0;

   113             y -= 5;

   114         }

   115         if (angleStart == 0) {

   116             mouth = OPEN;

   117         }

   118         if (angleStart > 45) {

   119             mouth = CLOSE;

   120         }

   121     }

   122 

   123     @Override

   124     public void render(int w, int h, Graphics2D g2) {

   125 

   126         // Draw Arcs

   127         g2.setStroke(new BasicStroke(5.0f));

   128         for (int i = 0; i < types.length; i++) {

   129             Arc2D arc = new Arc2D.Float(i);

   130             arc.setFrame((i + 1) * w * .2, (i + 1) * h * .2, w * .17, h * .17);

   131             arc.setAngleStart(45);

   132             arc.setAngleExtent(270);

   133             g2.setColor(BLUE);

   134             g2.draw(arc);

   135             g2.setColor(GRAY);

   136             g2.fill(arc);

   137             g2.setColor(BLACK);

   138             g2.drawString(types[i], (int) ((i + 1) * w * .2), (int) ((i + 1) * h

   139                     * .2 - 3));

   140         }

   141 

   142         // Draw Animated Pie Arc

   143         Arc2D pieArc = new Arc2D.Float(Arc2D.PIE);

   144         pieArc.setFrame(0, 0, aw, ah);

   145         pieArc.setAngleStart(angleStart);

   146         pieArc.setAngleExtent(angleExtent);

   147         AffineTransform at = AffineTransform.getTranslateInstance(x, y);

   148         switch (direction) {

   149             case DOWN:

   150                 at.rotate(Math.toRadians(90));

   151                 break;

   152             case BACKWARD:

   153                 at.rotate(Math.toRadians(180));

   154                 break;

   155             case UP:

   156                 at.rotate(Math.toRadians(270));

   157         }

   158         g2.setColor(BLUE);

   159         g2.fill(at.createTransformedShape(pieArc));

   160     }

   161 

   162     public static void main(String argv[]) {

   163         createDemoFrame(new Arcs());

   164     }

   165 }