ChartDirector 6.1 (Java Edition)

Simple Radar Chart




This example demonstrates the basic steps in creating radar charts.

Source Code Listing

[JSP Version] jspdemo/simpleradar.jsp
<%@page import="ChartDirector.*" %>
<%
// The data for the chart
double[] data = {90, 60, 65, 75, 40};

// The labels for the chart
String[] labels = {"Speed", "Reliability", "Comfort", "Safety", "Efficiency"};

// Create a PolarChart object of size 450 x 350 pixels
PolarChart c = new PolarChart(450, 350);

// Set center of plot area at (225, 185) with radius 150 pixels
c.setPlotArea(225, 185, 150);

// Add an area layer to the polar chart
c.addAreaLayer(data, 0x9999ff);

// Set the labels to the angular axis as spokes
c.angularAxis().setLabels(labels);

// Output the chart
String chart1URL = c.makeSession(request, "chart1");

// Include tool tip for the chart
String imageMap1 = c.getHTMLImageMap("", "", "title='{label}: score = {value}'");
%>
<html>
<body style="margin:5px 0px 0px 5px">
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    Simple Radar Chart
</div>
<hr color="#000080">
<div style="font-size:10pt; font-family:verdana; margin-bottom:1.5em">
    <a href="viewsource.jsp?file=<%=request.getServletPath()%>">View Source Code</a>
</div>
<img src='<%=response.encodeURL("getchart.jsp?"+chart1URL)%>'
    usemap="#map1" border="0">
<map name="map1"><%=imageMap1%></map>
</body>
</html>

[Java Version] javademo/simpleradar.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import ChartDirector.*;

public class simpleradar implements DemoModule
{
    //Name of demo program
    public String toString() { return "Simple Radar Chart"; }

    //Number of charts produced in this demo
    public int getNoOfCharts() { return 1; }

    //Main code for creating charts
    public void createChart(ChartViewer viewer, int chartIndex)
    {
        // The data for the chart
        double[] data = {90, 60, 65, 75, 40};

        // The labels for the chart
        String[] labels = {"Speed", "Reliability", "Comfort", "Safety", "Efficiency"};

        // Create a PolarChart object of size 450 x 350 pixels
        PolarChart c = new PolarChart(450, 350);

        // Set center of plot area at (225, 185) with radius 150 pixels
        c.setPlotArea(225, 185, 150);

        // Add an area layer to the polar chart
        c.addAreaLayer(data, 0x9999ff);

        // Set the labels to the angular axis as spokes
        c.angularAxis().setLabels(labels);

        // Output the chart
        viewer.setChart(c);

        //include tool tip for the chart
        viewer.setImageMap(c.getHTMLImageMap("clickable", "", "title='{label}: score = {value}'"));
    }

    //Allow this module to run as standalone program for easy testing
    public static void main(String[] args)
    {
        //Instantiate an instance of this demo module
        DemoModule demo = new simpleradar();

        //Create and set up the main window
        JFrame frame = new JFrame(demo.toString());
        frame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {System.exit(0);} });
        frame.getContentPane().setBackground(Color.white);

        // Create the chart and put them in the content pane
        ChartViewer viewer = new ChartViewer();
        demo.createChart(viewer, 0);
        frame.getContentPane().add(viewer);

        // Display the window
        frame.pack();
        frame.setVisible(true);
    }
}