ChartDirector 6.1 (Java Edition)

Polar Line Chart




This example demonstrates a polar line chart, completed with data symbols and data labels.

Source Code Listing

[JSP Version] jspdemo/polarline.jsp
<%@page import="ChartDirector.*" %>
<%
// The data for the chart
double[] data0 = {90, 25, 40, 55, 68, 44, 79, 85, 50};
double[] angles0 = {15, 60, 110, 180, 230, 260, 260, 310, 340};

double[] data1 = {80, 91, 66, 80, 92, 87};
double[] angles1 = {40, 65, 88, 110, 150, 200};

// Create a PolarChart object of size 460 x 500 pixels, with a grey (e0e0e0) background and 1 pixel
// 3D border
PolarChart c = new PolarChart(460, 500, 0xe0e0e0, 0x000000, 1);

//Set search path to current JSP directory for loading icon images
c.setSearchPath(getServletConfig().getServletContext(), request);

// Add a title to the chart at the top left corner using 15pt Arial Bold Italic font. Use a wood
// pattern as the title background.
c.addTitle("Polar Line Chart Demo", "Arial Bold Italic", 15).setBackground(c.patternColor("wood.png"
    ));

// Set center of plot area at (230, 280) with radius 180 pixels, and white (ffffff) background.
c.setPlotArea(230, 280, 180, 0xffffff);

// Set the grid style to circular grid, with grids below the chart layers
c.setGridStyle(false, false);

// Add a legend box at top-center of plot area (230, 35) using horizontal layout. Use 10pt Arial
// Bold font, with 1 pixel 3D border effect.
LegendBox b = c.addLegend(230, 35, false, "Arial Bold", 9);
b.setAlignment(Chart.TopCenter);
b.setBackground(Chart.Transparent, Chart.Transparent, 1);

// Set angular axis as 0 - 360, with a spoke every 30 units
c.angularAxis().setLinearScale(0, 360, 30);

// Add a blue (0xff) line layer to the chart using (data0, angle0)
PolarLineLayer layer0 = c.addLineLayer(data0, 0x0000ff, "Close Loop Line");
layer0.setAngles(angles0);

// Set the line width to 2 pixels
layer0.setLineWidth(2);

// Use 11 pixel triangle symbols for the data points
layer0.setDataSymbol(Chart.TriangleSymbol, 11);

// Enable data label and set its format
layer0.setDataLabelFormat("({value},{angle})");

// Set the data label text box with light blue (0x9999ff) backgruond color and 1 pixel 3D border
// effect
layer0.setDataLabelStyle().setBackground(0x9999ff, Chart.Transparent, 1);

// Add a red (0xff0000) line layer to the chart using (data1, angle1)
PolarLineLayer layer1 = c.addLineLayer(data1, 0xff0000, "Open Loop Line");
layer1.setAngles(angles1);

// Set the line width to 2 pixels
layer1.setLineWidth(2);

// Use 11 pixel diamond symbols for the data points
layer1.setDataSymbol(Chart.DiamondSymbol, 11);

// Set the line to open loop
layer1.setCloseLoop(false);

// Enable data label and set its format
layer1.setDataLabelFormat("({value},{angle})");

// Set the data label text box with light red (0xff9999) backgruond color and 1 pixel 3D border
// effect
layer1.setDataLabelStyle().setBackground(0xff9999, Chart.Transparent, 1);

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

// Include tool tip for the chart
String imageMap1 = c.getHTMLImageMap("", "", "title='[{dataSetName}] ({radius}, {angle})'");
%>
<html>
<body style="margin:5px 0px 0px 5px">
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    Polar Line 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/polarline.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import ChartDirector.*;

public class polarline implements DemoModule
{
    //Name of demo program
    public String toString() { return "Polar Line 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[] data0 = {90, 25, 40, 55, 68, 44, 79, 85, 50};
        double[] angles0 = {15, 60, 110, 180, 230, 260, 260, 310, 340};

        double[] data1 = {80, 91, 66, 80, 92, 87};
        double[] angles1 = {40, 65, 88, 110, 150, 200};

        // Create a PolarChart object of size 460 x 500 pixels, with a grey (e0e0e0) background and
        // 1 pixel 3D border
        PolarChart c = new PolarChart(460, 500, 0xe0e0e0, 0x000000, 1);

        // Add a title to the chart at the top left corner using 15pt Arial Bold Italic font. Use a
        // wood pattern as the title background.
        c.addTitle("Polar Line Chart Demo", "Arial Bold Italic", 15).setBackground(c.patternColor(
            "wood.png"));

        // Set center of plot area at (230, 280) with radius 180 pixels, and white (ffffff)
        // background.
        c.setPlotArea(230, 280, 180, 0xffffff);

        // Set the grid style to circular grid, with grids below the chart layers
        c.setGridStyle(false, false);

        // Add a legend box at top-center of plot area (230, 35) using horizontal layout. Use 10pt
        // Arial Bold font, with 1 pixel 3D border effect.
        LegendBox b = c.addLegend(230, 35, false, "Arial Bold", 9);
        b.setAlignment(Chart.TopCenter);
        b.setBackground(Chart.Transparent, Chart.Transparent, 1);

        // Set angular axis as 0 - 360, with a spoke every 30 units
        c.angularAxis().setLinearScale(0, 360, 30);

        // Add a blue (0xff) line layer to the chart using (data0, angle0)
        PolarLineLayer layer0 = c.addLineLayer(data0, 0x0000ff, "Close Loop Line");
        layer0.setAngles(angles0);

        // Set the line width to 2 pixels
        layer0.setLineWidth(2);

        // Use 11 pixel triangle symbols for the data points
        layer0.setDataSymbol(Chart.TriangleSymbol, 11);

        // Enable data label and set its format
        layer0.setDataLabelFormat("({value},{angle})");

        // Set the data label text box with light blue (0x9999ff) backgruond color and 1 pixel 3D
        // border effect
        layer0.setDataLabelStyle().setBackground(0x9999ff, Chart.Transparent, 1);

        // Add a red (0xff0000) line layer to the chart using (data1, angle1)
        PolarLineLayer layer1 = c.addLineLayer(data1, 0xff0000, "Open Loop Line");
        layer1.setAngles(angles1);

        // Set the line width to 2 pixels
        layer1.setLineWidth(2);

        // Use 11 pixel diamond symbols for the data points
        layer1.setDataSymbol(Chart.DiamondSymbol, 11);

        // Set the line to open loop
        layer1.setCloseLoop(false);

        // Enable data label and set its format
        layer1.setDataLabelFormat("({value},{angle})");

        // Set the data label text box with light red (0xff9999) backgruond color and 1 pixel 3D
        // border effect
        layer1.setDataLabelStyle().setBackground(0xff9999, Chart.Transparent, 1);

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

        //include tool tip for the chart
        viewer.setImageMap(c.getHTMLImageMap("clickable", "",
            "title='[{dataSetName}] ({radius}, {angle})'"));
    }

    //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 polarline();

        //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);
    }
}