/* * @(#)Ellipses.java	1.13 99/04/23 * * Copyright (c) 1998, 1999 by Sun Microsystems, Inc. All Rights Reserved. *  * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use, * modify and redistribute this software in source and binary code form, * provided that i) this copyright notice and license appear on all copies of * the software; and ii) Licensee does not utilize the software in a manner * which is disparaging to Sun. *  * This software is provided "AS IS," without a warranty of any kind. ALL * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE * POSSIBILITY OF SUCH DAMAGES. *  * This software is not designed or intended for use in on-line control of * aircraft, air traffic, aircraft navigation or aircraft communications; or in * the design, construction, operation or maintenance of any nuclear * facility. Licensee represents and warrants that it will not use or * redistribute the Software for such purposes. */package demos.Arcs_Curves;import java.awt.*;import java.awt.event.*;import java.awt.geom.Ellipse2D;import AnimatingContext;import DemoPanel;import DemoSurface;/** * Ellipse2D 25 animated expanding ellipses. */public class Ellipses extends DemoSurface implements AnimatingContext {    private static Color colors[] = { Color.blue, Color.cyan, Color.green,                Color.magenta, Color.orange, Color.pink, Color.red,                 Color.yellow, Color.lightGray, Color.white };    private Ellipse2D.Float[] ellipses;    private double esize[];    private float estroke[];    private double maxSize;    public Ellipses() {        setBackground(Color.black);        ellipses = new Ellipse2D.Float[25];        esize = new double[ellipses.length];        estroke = new float[ellipses.length];        for (int i = 0; i < ellipses.length; i++) {            ellipses[i] = new Ellipse2D.Float();            getRandomXY(i, 20 * Math.random(), 200, 200);        }    }    public void getRandomXY(int i, double size, int w, int h) {        esize[i] = size;        estroke[i] = 1.0f;        double x = Math.random() * (w-(maxSize/2));        double y = Math.random() * (h-(maxSize/2));        ellipses[i].setFrame(x, y, size, size);    }    public void reset(int w, int h) {        maxSize = w/10;        for (int i = 0; i < ellipses.length; i++ ) {            getRandomXY(i, maxSize * Math.random(), w, h);        }    }    public void step(int w, int h) {        for (int i = 0; i < ellipses.length; i++) {            estroke[i] += 0.025f;            esize[i]++;            if (esize[i] > maxSize) {                getRandomXY(i, 1, w, h);            } else {                ellipses[i].setFrame(ellipses[i].getX(), ellipses[i].getY(),                                     esize[i], esize[i]);            }        }    }    public void drawDemo(int w, int h, Graphics2D g2) {        for (int i = 0; i < ellipses.length; i++) {            g2.setColor(colors[i%colors.length]);            g2.setStroke(new BasicStroke(estroke[i]));            g2.draw(ellipses[i]);        }    }    public static void main(String argv[]) {        final DemoPanel dp = new DemoPanel(new Ellipses());        Frame f = new Frame("Java2D Demo - Ellipses");        f.addWindowListener(new WindowAdapter() {            public void windowClosing(WindowEvent e) {System.exit(0);}            public void windowDeiconified(WindowEvent e) {                 dp.surface.start();             }            public void windowIconified(WindowEvent e) {                 dp.surface.stop();             }        });        f.add("Center", dp);        f.pack();        f.setSize(new Dimension(400,300));        f.show();        dp.surface.start();    }}