JFreeChart: Dual Axis Demo 5
/* ===========================================================
* 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.]
*
* ------------------
* DualAxisDemo5.java
* ------------------
* (C) Copyright 2002-2004, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* $Id: DualAxisDemo5.java,v 1.12 2004/04/29 07:54:56 mungady Exp $
*
* Changes
* -------
* 19-Sep-2003 : Version 1 (DG);
* 06-Feb-2004 : Modified to correct legend (DG);
*
*/
package org.jfree.chart.demo;
import java.awt.Color;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.LegendItem;
import org.jfree.chart.LegendItemCollection;
import org.jfree.chart.axis.AxisLocation;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.renderer.category.BarRenderer;
import org.jfree.chart.renderer.category.CategoryItemRenderer;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
/**
* This demo shows how to create a dual axis bar chart. A workaround is used because the
* {@link BarRenderer} and {@link CategoryAxis} classes will overlap the bars for the two
* datasets - to get around this, an an additional series (containing 'null' values) is added
* to each dataset, and the getLegendItems() method in the plot is overridden.
*
*/
public class DualAxisDemo5 extends ApplicationFrame {
/**
* Creates a new demo instance.
*
* @param title the frame title.
*/
public DualAxisDemo5(final String title) {
super(title);
final CategoryDataset dataset1 = createDataset1();
final CategoryDataset dataset2 = createDataset2();
final JFreeChart chart = createChart(dataset1, dataset2);
final ChartPanel chartPanel = new ChartPanel(chart);
chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
setContentPane(chartPanel);
}
// ****************************************************************************
// * JFREECHART DEVELOPER GUIDE *
// * The JFreeChart Developer Guide, written by David Gilbert, is available *
// * to purchase from Object Refinery Limited: *
// * *
// * http://www.object-refinery.com/jfreechart/guide.html *
// * *
// * Sales are used to provide funding for the JFreeChart project - please *
// * support us so that we can continue developing free software. *
// ****************************************************************************
/**
* Creates a sample dataset.
*
* @return The dataset.
*/
private CategoryDataset createDataset1() {
// row keys...
final String series1 = "Series 1";
final String series2 = "Dummy 1";
// column keys...
final String category1 = "Category 1";
final String category2 = "Category 2";
final String category3 = "Category 3";
final String category4 = "Category 4";
// create the dataset...
final DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(1.0, series1, category1);
dataset.addValue(4.0, series1, category2);
dataset.addValue(3.0, series1, category3);
dataset.addValue(5.0, series1, category4);
dataset.addValue(null, series2, category1);
dataset.addValue(null, series2, category2);
dataset.addValue(null, series2, category3);
dataset.addValue(null, series2, category4);
return dataset;
}
/**
* Creates a sample dataset.
*
* @return The dataset.
*/
private CategoryDataset createDataset2() {
// row keys...
final String series1 = "Dummy 2";
final String series2 = "Series 2";
// column keys...
final String category1 = "Category 1";
final String category2 = "Category 2";
final String category3 = "Category 3";
final String category4 = "Category 4";
// create the dataset...
final DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(null, series1, category1);
dataset.addValue(null, series1, category2);
dataset.addValue(null, series1, category3);
dataset.addValue(null, series1, category4);
dataset.addValue(75.0, series2, category1);
dataset.addValue(87.0, series2, category2);
dataset.addValue(96.0, series2, category3);
dataset.addValue(68.0, series2, category4);
return dataset;
}
/**
* Creates a chart.
*
* @param dataset1 the first dataset.
* @param dataset2 the second dataset.
*
* @return A chart.
*/
private JFreeChart createChart(final CategoryDataset dataset1, final CategoryDataset dataset2) {
final CategoryAxis domainAxis = new CategoryAxis("Category");
final NumberAxis rangeAxis = new NumberAxis("Value");
final BarRenderer renderer1 = new BarRenderer();
final CategoryPlot plot = new CategoryPlot(dataset1, domainAxis, rangeAxis, renderer1) {
/**
* Override the getLegendItems() method to handle special case.
*
* @return the legend items.
*/
public LegendItemCollection getLegendItems() {
final LegendItemCollection result = new LegendItemCollection();
final CategoryDataset data = getDataset();
if (data != null) {
final CategoryItemRenderer r = getRenderer();
if (r != null) {
final LegendItem item = r.getLegendItem(0, 0);
result.add(item);
}
}
// the JDK 1.2.2 compiler complained about the name of this
// variable
final CategoryDataset dset2 = getDataset(1);
if (dset2 != null) {
final CategoryItemRenderer renderer2 = getRenderer(1);
if (renderer2 != null) {
final LegendItem item = renderer2.getLegendItem(1, 1);
result.add(item);
}
}
return result;
}
};
final JFreeChart chart = new JFreeChart("Dual Axis Bar Chart", plot);
chart.setBackgroundPaint(Color.white);
// chart.getLegend().setAnchor(Legend.SOUTH);
plot.setBackgroundPaint(new Color(0xEE, 0xEE, 0xFF));
plot.setDomainAxisLocation(AxisLocation.BOTTOM_OR_RIGHT);
plot.setDataset(1, dataset2);
plot.mapDatasetToRangeAxis(1, 1);
final ValueAxis axis2 = new NumberAxis("Secondary");
plot.setRangeAxis(1, axis2);
plot.setRangeAxisLocation(1, AxisLocation.BOTTOM_OR_RIGHT);
final BarRenderer renderer2 = new BarRenderer();
plot.setRenderer(1, renderer2);
return chart;
}
/**
* Starting point for the demonstration application.
*
* @param args ignored.
*/
public static void main(final String[] args) {
final DualAxisDemo5 demo = new DualAxisDemo5("Dual Axis Demo 5");
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);
}
}
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