jdk/test/sanity/client/lib/SwingSet3/src/com/sun/swingset3/demos/spinner/JMandelbrot.java
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/sanity/client/lib/SwingSet3/src/com/sun/swingset3/demos/spinner/JMandelbrot.java Wed Mar 30 19:05:58 2016 -0700
@@ -0,0 +1,328 @@
+/*
+ * Copyright (c) 2007, 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.sun.swingset3.demos.spinner;
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.*;
+import java.awt.geom.Point2D;
+import java.awt.image.BufferedImage;
+import java.awt.image.DataBufferInt;
+import java.util.List;
+
+import com.sun.swingset3.demos.ResourceManager;
+
+/**
+ * @author Mikhail Lapshin
+ */
+public class JMandelbrot extends JComponent {
+
+ private static final double EPSILON = 1E-16;
+ private static final int MIN_WIDTH = 50;
+ private static final int MIN_HEIGHT = 50;
+ private static final double ZOOM_RATE = 3;
+ private static final int NUM_OF_THREADS = 4;
+
+ private Point2D center;
+ public static final String CENTER_PROPERTY_NAME = "center";
+
+ private int maxIteration = 300;
+ public static final String MAX_ITERATION_PROPERTY_NAME = "maxIteration";
+
+ private Palette palette;
+ public static final String PALETTE_PROPERTY_NAME = "palette";
+
+ private BufferedImage buffer;
+ private final MandelbrotCalculator[] calculators
+ = new MandelbrotCalculator[NUM_OF_THREADS];
+
+ private double xLowLimit = -2;
+ private double xHighLimit = 2;
+ private double yLowLimit = -2;
+ private double yHighLimit = 2;
+ private double xScale = 100;
+ private double yScale = 100;
+ private int oldComponentWidth = (int) (xScale * (xHighLimit - xLowLimit));
+ private int oldComponentHeight = (int) (yScale * (yHighLimit - yLowLimit));
+
+ public JMandelbrot(int width, int height, Palette palette,
+ ResourceManager resourceManager) {
+ setPreferredSize(new Dimension(width, height));
+ setMinimumSize(new Dimension(MIN_WIDTH, MIN_HEIGHT));
+ calcConstants(width, height);
+ setPalette(palette);
+ setToolTipText(resourceManager.getString("SpinnerDemo.toolTip"));
+ installListeners();
+ }
+
+ private void calcConstants() {
+ calcConstants(getWidth(), getHeight());
+ }
+
+ private void calcConstants(int width, int height) {
+ if ((width >= MIN_WIDTH) && (height >= MIN_HEIGHT)) {
+ double oldIntervalWidth = xHighLimit - xLowLimit;
+ double oldIntervalHeight = yHighLimit - yLowLimit;
+ double newIntervalWidth
+ = width * oldIntervalWidth / oldComponentWidth;
+ double newIntervalHeight
+ = height * oldIntervalHeight / oldComponentHeight;
+ double xDiff = newIntervalWidth - oldIntervalWidth;
+ double yDiff = newIntervalHeight - oldIntervalHeight;
+ xLowLimit -= xDiff / 2;
+ xHighLimit += xDiff / 2;
+ yLowLimit -= yDiff / 2;
+ yHighLimit += yDiff / 2;
+ buffer = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
+ oldComponentWidth = width;
+ oldComponentHeight = height;
+ setCenter(calcCenter());
+ }
+ }
+
+ private void installListeners() {
+ addMouseListener(new MouseAdapter() {
+ @Override
+ public void mousePressed(MouseEvent e) {
+ int xCoord = e.getX();
+ int yCoord = e.getY();
+ double intervalWidth = xHighLimit - xLowLimit;
+ double intervalHeight = yHighLimit - yLowLimit;
+ double x = intervalWidth * xCoord / getWidth() + xLowLimit;
+ double y = intervalHeight * yCoord / getHeight() + yLowLimit;
+
+ double newIntervalWidth;
+ double newIntervalHeight;
+ if (e.getButton() == MouseEvent.BUTTON1) {
+ boolean limitReached = false;
+ newIntervalWidth = intervalWidth / ZOOM_RATE;
+ if ((newIntervalWidth / getWidth()) < EPSILON) {
+ newIntervalWidth = intervalWidth;
+ limitReached = true;
+ }
+ newIntervalHeight = intervalHeight / ZOOM_RATE;
+ if ((newIntervalHeight / getHeight()) < EPSILON) {
+ newIntervalHeight = intervalHeight;
+ limitReached = true;
+ }
+ if (!limitReached) {
+ xLowLimit = x - (x - xLowLimit) / ZOOM_RATE;
+ yLowLimit = y - (y - yLowLimit) / ZOOM_RATE;
+ }
+ } else {
+ newIntervalWidth = intervalWidth * ZOOM_RATE;
+ newIntervalHeight = intervalHeight * ZOOM_RATE;
+ xLowLimit = x - (x - xLowLimit) * ZOOM_RATE;
+ yLowLimit = y - (y - yLowLimit) * ZOOM_RATE;
+ }
+
+ xHighLimit = xLowLimit + newIntervalWidth;
+ yHighLimit = yLowLimit + newIntervalHeight;
+
+ setCenter(calcCenter());
+
+ xScale = getWidth() / newIntervalWidth;
+ yScale = getHeight() / newIntervalHeight;
+
+ calculatePicture();
+ }
+ });
+
+ addComponentListener(new ComponentListener() {
+ @Override
+ public void componentResized(ComponentEvent e) {
+ calcConstants();
+ calculatePicture();
+ repaint();
+ }
+
+ @Override
+ public void componentMoved(ComponentEvent e) {
+ }
+
+ @Override
+ public void componentShown(ComponentEvent e) {
+ }
+
+ @Override
+ public void componentHidden(ComponentEvent e) {
+ }
+ });
+ }
+
+ //<snip>Use SwingWorker to asynchronously calculate parts of the picture
+ public void calculatePicture() {
+ int yStep = getHeight() / NUM_OF_THREADS;
+ int yStart = 0;
+ for (int i = 0; i < calculators.length; i++) {
+ if ((calculators[i] != null) && !calculators[i].isDone()) {
+ calculators[i].cancel(true);
+ }
+ int yEnd = i == calculators.length - 1 ? getHeight() : yStart + yStep;
+ calculators[i] = new MandelbrotCalculator(yStart, yEnd);
+ calculators[i].execute();
+ yStart = yEnd;
+ }
+ }
+ //</snip>
+
+ private Point2D calcCenter() {
+ return new Point2D.Double(xLowLimit + (xHighLimit - xLowLimit) / 2,
+ yLowLimit + (yHighLimit - yLowLimit) / 2);
+ }
+
+ @Override
+ protected void paintComponent(Graphics g) {
+ super.paintComponent(g);
+ g.drawImage(buffer, 0, 0, null);
+ }
+
+ //<snip>Use SwingWorker to asynchronously calculate parts of the picture
+ private class MandelbrotCalculator extends SwingWorker<Object, Object> {
+
+ private final int yStart;
+ private final int yEnd;
+
+ public MandelbrotCalculator(int yStart, int yEnd) {
+ this.yStart = yStart;
+ this.yEnd = yEnd;
+ }
+
+ @Override
+ protected Object doInBackground() throws Exception {
+ int[] data = ((DataBufferInt) buffer.getRaster().getDataBuffer()).getData();
+
+ double xArr[] = new double[buffer.getWidth()];
+
+ for (int i = 0; i < xArr.length; i++) {
+ xArr[i] = i / xScale + xLowLimit;
+ }
+
+ double yArr[] = new double[yEnd - yStart];
+
+ for (int i = 0; i < yArr.length; i++) {
+ yArr[i] = (yStart + i) / yScale + yLowLimit;
+ }
+
+ int i = yStart * buffer.getWidth();
+
+ for (double y : yArr) {
+ for (double x : xArr) {
+ int value = calcValue(x, y);
+
+ data[i] = value == maxIteration ? 0 : palette.getRgbColor(value);
+
+ i++;
+ }
+ if (Thread.currentThread().isInterrupted()) {
+ return null;
+ }
+ publish();
+ }
+ return null;
+ }
+
+ private int calcValue(double x, double y) {
+ double x0 = x;
+ double y0 = y;
+
+ for (int i = 0; i < maxIteration; i++) {
+ double x2 = x * x;
+ double y2 = y * y;
+
+ if (x2 + y2 > 4) {
+ return i;
+ }
+
+ y = 2 * x * y + y0;
+ x = x2 - y2 + x0;
+ }
+
+ return maxIteration;
+ }
+
+ @Override
+ protected void process(List<Object> chunks) {
+ repaint();
+ }
+ }
+ //</snip>
+
+ // Getters and Setters
+ public int getMaxIteration() {
+ return maxIteration;
+ }
+
+ public void setMaxIteration(int maxIteration) {
+ int oldValue = this.maxIteration;
+ this.maxIteration = maxIteration;
+ firePropertyChange(MAX_ITERATION_PROPERTY_NAME, oldValue, maxIteration);
+ palette.setSize(maxIteration);
+ }
+
+ public double getXHighLimit() {
+ return xHighLimit;
+ }
+
+ public double getXLowLimit() {
+ return xLowLimit;
+ }
+
+ public double getYLowLimit() {
+ return yLowLimit;
+ }
+
+ public double getYHighLimit() {
+ return yHighLimit;
+ }
+
+ public Point2D getCenter() {
+ return center;
+ }
+
+ public void setCenter(Point2D coords) {
+ Point2D oldValue = this.center;
+ this.center = coords;
+
+ double width = xHighLimit - xLowLimit;
+ double height = yHighLimit - yLowLimit;
+
+ xLowLimit = coords.getX() - width / 2;
+ xHighLimit = xLowLimit + width;
+ yLowLimit = coords.getY() - height / 2;
+ yHighLimit = yLowLimit + height;
+
+ firePropertyChange(CENTER_PROPERTY_NAME, oldValue, coords);
+ }
+
+ public Palette getPalette() {
+ return palette;
+ }
+
+ public void setPalette(Palette palette) {
+ Palette oldValue = this.palette;
+ palette.setSize(maxIteration);
+ this.palette = palette;
+ firePropertyChange(PALETTE_PROPERTY_NAME, oldValue, palette);
+ }
+}