?? imagemapdemo1.java
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/* ------------------
* ImageMapDemo1.java
* ------------------
* (C) Copyright 2002-2006, by Object Refinery Limited and Richard Atkinson.
*
*/
package demo;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartRenderingInfo;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.entity.StandardEntityCollection;
import org.jfree.chart.imagemap.ImageMapUtilities;
import org.jfree.chart.labels.StandardCategoryToolTipGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.BarRenderer;
import org.jfree.chart.urls.StandardCategoryURLGenerator;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.general.DatasetUtilities;
/**
* A demo showing how to create an HTML image map for a bar chart.
*/
public class ImageMapDemo1 {
/**
* Default constructor.
*/
public ImageMapDemo1() {
super();
}
/**
* Starting point for the demo.
*
* @param args ignored.
*/
public static void main(String[] args) {
// create a chart
double[][] data = new double[][] {
{56.0, -12.0, 34.0, 76.0, 56.0, 100.0, 67.0, 45.0},
{37.0, 45.0, 67.0, 25.0, 34.0, 34.0, 100.0, 53.0},
{43.0, 54.0, 34.0, 34.0, 87.0, 64.0, 73.0, 12.0}};
CategoryDataset dataset = DatasetUtilities.createCategoryDataset(
"Series ", "Type ", data);
JFreeChart chart = null;
boolean drilldown = true;
if (drilldown) {
CategoryAxis categoryAxis = new CategoryAxis("Category");
ValueAxis valueAxis = new NumberAxis("Value");
BarRenderer renderer = new BarRenderer();
renderer.setToolTipGenerator(
new StandardCategoryToolTipGenerator());
renderer.setItemURLGenerator(new StandardCategoryURLGenerator(
"bar_chart_detail.jsp"));
CategoryPlot plot = new CategoryPlot(dataset, categoryAxis,
valueAxis, renderer);
plot.setOrientation(PlotOrientation.VERTICAL);
chart = new JFreeChart("Bar Chart", JFreeChart.DEFAULT_TITLE_FONT,
plot, true);
}
else {
chart = ChartFactory.createBarChart(
"Vertical Bar Chart", // chart title
"Category", // domain axis label
"Value", // range axis label
dataset, // data
PlotOrientation.VERTICAL,
true, // include legend
true,
false
);
}
chart.setBackgroundPaint(java.awt.Color.white);
// save it to an image
try {
ChartRenderingInfo info = new ChartRenderingInfo(
new StandardEntityCollection());
File file1 = new File("barchart100.png");
ChartUtilities.saveChartAsPNG(file1, chart, 600, 400, info);
// write an HTML page incorporating the image with an image map
File file2 = new File("barchart100.html");
OutputStream out = new BufferedOutputStream(
new FileOutputStream(file2));
PrintWriter writer = new PrintWriter(out);
writer.println("<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\"");
writer.println("\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">");
writer.println("<html xmlns=\"http://www.w3.org/1999/xhtml\" lang=\"en\" xml:lang=\"en\">");
writer.println("<head><title>JFreeChart Image Map Demo</title></head>");
writer.println("<body><p>");
ImageMapUtilities.writeImageMap(writer, "chart", info);
writer.println("<img src=\"barchart100.png\" "
+ "width=\"600\" height=\"400\" usemap=\"#chart\" alt=\"barchart100.png\"/>");
writer.println("</p></body>");
writer.println("</html>");
writer.close();
}
catch (IOException e) {
System.out.println(e.toString());
}
}
}
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