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== JFreeChart: Multi Shapes XY Demo ==



<source lang="java">

/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jfreechart/index.html
*
* This library is free software; you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Foundation;
* either version 2.1 of the License, or (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ----------------------
* MultiShapesXYDemo.java
* ----------------------
* (C) Copyright 2002-2004, by Andreas Schneider.
*
* Original Author: Andreas Schneider;
* Contributor(s): -;
*
* $Id: MultiShapesXYDemo.java,v 1.12 2004/04/29 08:21:42 mungady Exp $
*
* Changes
* -------
* 13-May-2002 : Version 1, contributed by Andreas Schneider (DG);
* 30-May-2002 : Added title to application frame (DG);
* 11-Oct-2002 : Fixed errors reported by Checkstyle (DG);
*
*/
package org.jfree.chart.demo;
import java.awt.Color;
import java.awt.Image;
import java.awt.MediaTracker;
import java.awt.Paint;
import java.awt.Point;
import java.awt.Shape;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Rectangle2D;
import java.net.URL;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.Plot;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.StandardXYItemRenderer;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
/**
* A demonstration showing multiple shapes on an {@link XYPlot}.
*
* @author Andreas Schneider
*/
public class MultiShapesXYDemo extends ApplicationFrame {
/** The number of point. */
private static final int NUMBER_OF_POINTS = 200;
/** The increment. */
private static final double INCREMENT = 0.1;
/** Color component. */
private static final float R1 = 0.0f;
/** Color component. */
private static final float G1 = 1.0f;
/** Color component. */
private static final float B1 = 0.0f;
/** Color component. */
private static final float R2 = 1.0f;
/** Color component. */
private static final float G2 = 0.0f;
/** Color component. */
private static final float B2 = 0.0f;
/** The series. */
private XYSeries series;
/** The ball image. */
private Image ballImage;
/** The arrow image. */
private Image arrowImage;
/**
* A demonstration application showing a series with different shape attributes per item.
*
* @param title the frame title.
*/
public MultiShapesXYDemo(final String title) {
super(title);
System.out.println("About to get images...");
final URL url1 = getClass().getClassLoader().getResource(
"org/jfree/chart/demo/redball.png"
);
final URL url2 = getClass().getClassLoader().getResource("org/jfree/chart/demo/arrow.png");
if (url1 != null && url2 != null) {
this.ballImage = new javax.swing.ImageIcon(url1).getImage();
this.arrowImage = new javax.swing.ImageIcon(url2).getImage();
final MediaTracker tracker = new MediaTracker(this);
tracker.addImage(this.ballImage, 0);
tracker.addImage(this.arrowImage, 1);
try {
tracker.waitForID(0);
tracker.waitForID(1);
}
catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("Images loaded");
}
else {
System.err.println("Can"t find images");
}
System.out.println("Images done.");
this.series = new XYSeries("Some Data");
for (int i = 0; i < NUMBER_OF_POINTS; i++) {
final double x = INCREMENT * i;
final double y = Math.sin(x);
this.series.add(x, y);
}
final XYSeriesCollection data = new XYSeriesCollection(this.series);
final NumberAxis domainAxis = new NumberAxis("x");
final NumberAxis rangeAxis = new NumberAxis("sin(x)");
final DemoRenderer renderer = new DemoRenderer();
final Plot plot = new XYPlot(data, domainAxis, rangeAxis, renderer);
final JFreeChart chart = new JFreeChart(plot);
final ChartPanel chartPanel = new ChartPanel(chart);
chartPanel.setPreferredSize(new java.awt.Dimension(600, 380));
setContentPane(chartPanel);
}
/**
* A demo renderer.
*
* @author AS
*/
class DemoRenderer extends StandardXYItemRenderer {
/**
* Creates a new renderer.
*/
public DemoRenderer() {
super(StandardXYItemRenderer.SHAPES | StandardXYItemRenderer.IMAGES, null);
}
/**
* Returns true if the shape is filled, and false otherwise.
*
* @param plot the plot.
* @param series the series.
* @param item the item.
* @param x the x-value.
* @param y the y-value.
*
* @return true if the shape is filled, and false otherwise.
*/
protected boolean isShapeFilled(final Plot plot, final int series, final int item,
final double x, final double y) {
return (item % 2 == 0);
}
/**
* Returns the shape scale.
*
* @param plot the plot.
* @param series the series.
* @param item the item.
* @param x the x-value.
* @param y the y-value.
*
* @return the shape scale.
*/
protected double getShapeScale(final Plot plot, final int series, final int item,
final double x, final double y) {
final float rat = (float) item / (float) NUMBER_OF_POINTS; // 0..1
return 6.0f - rat * 4.0;
}
/**
* Returns the shape paint.
*
* @param plot the plot.
* @param series the series.
* @param item the item.
* @param x the x-value.
* @param y the y-value.
*
* @return the shape paint.
*/
protected Paint getPaint(final Plot plot, final int series, final int item,
final double x, final double y) {
final float rat = (float) item / (float) NUMBER_OF_POINTS; // 0..1
final float r = (1.0f - rat) * R1 + rat * R2;
final float g = (1.0f - rat) * G1 + rat * G2;
final float b = (1.0f - rat) * B1 + rat * B2;
final Color c = new Color(r, g, b);
return c;
}
/**
* Returns the shape.
*
* @param plot the plot.
* @param series the series.
* @param item the item.
* @param x the x-value.
* @param y the y-value.
* @param scale the scale.
*
* @return the shape.
*/
protected Shape getShape(final Plot plot, final int series, final int item,
final double x, final double y, final double scale) {
final Shape shape;
switch (item % 2) {
case 0:
shape = new Rectangle2D.Double(x - 0.5 * scale, y - 0.5 * scale, scale, scale);
break;
default:
shape = new Ellipse2D.Double(x - 0.5 * scale, y - 0.5 * scale, scale, scale);
break;
}
return shape;
}
/**
* Returns the image.
*
* @param plot the plot.
* @param series the series.
* @param item the item.
* @param x the x-value.
* @param y the y-value.
*
* @return the image.
*/
protected Image getImage(final Plot plot, final int series, final int item,
final double x, final double y) {
if (item % 10 == 0) {
return ballImage;
}
else if (item == 42) {
return arrowImage;
}
return null;
}
/**
* Returns the image hot spot.
*
* @param plot the plot.
* @param series the series.
* @param item the item.
* @param x the x-value.
* @param y the y-value.
* @param image the image.
*
* @return the image hot spot.
*/
protected Point getImageHotspot(final Plot plot, final int series, final int item,
final double x, final double y, final Image image) {
if (image == arrowImage) {
// the arrow has the hot spot at the bottom left
return new Point(0, image.getHeight(null));
}
return super.getImageHotspot(plot, series, item, x, y, image);
}
}
// ****************************************************************************
// * JFREECHART DEVELOPER GUIDE *
// * The JFreeChart Developer Guide, written by David Gilbert, is available *
// * to purchase from Object Refinery Limited: *
// * *
// * http://www.object-refinery.ru/jfreechart/guide.html *
// * *
// * Sales are used to provide funding for the JFreeChart project - please *
// * support us so that we can continue developing free software. *
// ****************************************************************************

/**
* Starting point for the demonstration application.
*
* @param args ignored.
*/
public static void main(final String[] args) {
final MultiShapesXYDemo demo = new MultiShapesXYDemo("XYPlot With Multiple Shapes");
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);
}
}

</source>

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