ChartDirector 6.1 (Java Edition)

Sector Zones




This example demonstrates adding sector zones to a polar chart.

In ChartDirector, a zone defined on the angular axis will mark an angular range, and so will appear as sectors on a polar chart.

This example contains three sector zones in the plot area background, colored as red, yellow and green. The green region is the original background of the plot area, while the red and yellow regions are added using AngularAxis.addZone.

Source Code Listing

[JSP Version] jspdemo/polarzones2.jsp
<%@page import="ChartDirector.*" %>
<%
// The data for the chart
double[] data = {5.1, 1.5, 5.1, 4.0, 1.7, 8.7, 9.4, 2.1, 3.5, 8.8, 5.0, 6.0};

// The labels for the chart
String[] labels = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", "Oct", "Nov",
    "Dec"};

// Create a PolarChart object of size 400 x 420 pixels. with a metallic blue (9999ff) background
// color and 1 pixel 3D border
PolarChart c = new PolarChart(400, 420, Chart.metalColor(0x9999ff), 0x000000, 1);

// Add a title to the chart using 16pt Arial Bold Italic font. The title text is white (0xffffff) on
// deep blue (000080) background
c.addTitle("Chemical Concentration", "Arial Bold Italic", 16, 0xffffff).setBackground(0x000080);

// Set center of plot area at (200, 240) with radius 145 pixels. Set background color to green
// (0x33ff33)
c.setPlotArea(200, 240, 145, 0x33ff33);

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

// Color the sector between label index = 5.5 to 7.5 as red (ff3333) zone
c.angularAxis().addZone(5.5, 7.5, 0xff3333);

// Color the sector between label index = 4.5 to 5.5, and also between 7.5 to 8.5, as yellow
// (ff3333) zones
c.angularAxis().addZone(4.5, 5.5, 0xffff00);
c.angularAxis().addZone(7.5, 8.5, 0xffff00);

// Set the grid style to circular grid
c.setGridStyle(false);

// Use semi-transparent (40ffffff) label background so as not to block the data
c.radialAxis().setLabelStyle().setBackground(0x40ffffff, 0x40000000);

// Add a legend box at (200, 30) top center aligned, using 9pt Arial Bold font. with a black border.
LegendBox legendBox = c.addLegend(200, 30, false, "Arial Bold", 9);
legendBox.setAlignment(Chart.TopCenter);

// Add legend keys to represent the red/yellow/green zones
legendBox.addKey("Very Dry", 0xff3333);
legendBox.addKey("Critical", 0xffff00);
legendBox.addKey("Moderate", 0x33ff33);

// Add a blue (0x80) line layer with line width set to 3 pixels and use purple (ff00ff) cross
// symbols for the data points
PolarLineLayer layer = c.addLineLayer(data, 0x000080);
layer.setLineWidth(3);
layer.setDataSymbol(Chart.Cross2Shape(), 15, 0xff00ff);

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

// Include tool tip for the chart.
String imageMap1 = layer.getHTMLImageMap("", "", "title='Concentration on {label}: {value} ppm'");
%>
<html>
<body style="margin:5px 0px 0px 5px">
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    Sector Zones
</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/polarzones2.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import ChartDirector.*;

public class polarzones2 implements DemoModule
{
    //Name of demo program
    public String toString() { return "Sector Zones"; }

    //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 = {5.1, 1.5, 5.1, 4.0, 1.7, 8.7, 9.4, 2.1, 3.5, 8.8, 5.0, 6.0};

        // The labels for the chart
        String[] labels = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", "Oct",
            "Nov", "Dec"};

        // Create a PolarChart object of size 400 x 420 pixels. with a metallic blue (9999ff)
        // background color and 1 pixel 3D border
        PolarChart c = new PolarChart(400, 420, Chart.metalColor(0x9999ff), 0x000000, 1);

        // Add a title to the chart using 16pt Arial Bold Italic font. The title text is white
        // (0xffffff) on deep blue (000080) background
        c.addTitle("Chemical Concentration", "Arial Bold Italic", 16, 0xffffff).setBackground(
            0x000080);

        // Set center of plot area at (200, 240) with radius 145 pixels. Set background color to
        // green (0x33ff33)
        c.setPlotArea(200, 240, 145, 0x33ff33);

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

        // Color the sector between label index = 5.5 to 7.5 as red (ff3333) zone
        c.angularAxis().addZone(5.5, 7.5, 0xff3333);

        // Color the sector between label index = 4.5 to 5.5, and also between 7.5 to 8.5, as yellow
        // (ff3333) zones
        c.angularAxis().addZone(4.5, 5.5, 0xffff00);
        c.angularAxis().addZone(7.5, 8.5, 0xffff00);

        // Set the grid style to circular grid
        c.setGridStyle(false);

        // Use semi-transparent (40ffffff) label background so as not to block the data
        c.radialAxis().setLabelStyle().setBackground(0x40ffffff, 0x40000000);

        // Add a legend box at (200, 30) top center aligned, using 9pt Arial Bold font. with a black
        // border.
        LegendBox legendBox = c.addLegend(200, 30, false, "Arial Bold", 9);
        legendBox.setAlignment(Chart.TopCenter);

        // Add legend keys to represent the red/yellow/green zones
        legendBox.addKey("Very Dry", 0xff3333);
        legendBox.addKey("Critical", 0xffff00);
        legendBox.addKey("Moderate", 0x33ff33);

        // Add a blue (0x80) line layer with line width set to 3 pixels and use purple (ff00ff)
        // cross symbols for the data points
        PolarLineLayer layer = c.addLineLayer(data, 0x000080);
        layer.setLineWidth(3);
        layer.setDataSymbol(Chart.Cross2Shape(), 15, 0xff00ff);

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

        // Include tool tip for the chart.
        viewer.setImageMap(layer.getHTMLImageMap("clickable", "",
            "title='Concentration on {label}: {value} ppm'"));
    }

    //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 polarzones2();

        //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);
    }
}