ChartDirector 6.1 (Java Edition)

Donut Chart




This example demonstrates a donut chart with ring shading effects. It also demonstrates brushed metal background, rounded frame, customized sector labels and using CDML and Parameter Substitution and Formatting to format legend text.

Source Code Listing

[JSP Version] jspdemo/donut.jsp
<%@page import="ChartDirector.*" %>
<%
// The data for the pie chart
double[] data = {25, 18, 15, 12, 8, 30, 35};

// The labels for the pie chart
String[] labels = {"Labor", "Licenses", "Taxes", "Legal", "Insurance", "Facilities", "Production"};

// Create a PieChart object of size 600 x 320 pixels. Set background color to brushed silver, with a
// 2 pixel 3D border. Use rounded corners of 20 pixels radius.
PieChart c = new PieChart(600, 320, Chart.brushedSilverColor(), Chart.Transparent, 2);
c.setRoundedFrame(0xffffff, 20);

// Add a title using 18pt Times New Roman Bold Italic font. #Set top/bottom margins to 8 pixels.
TextBox title = c.addTitle("Donut Chart Demonstration", "Times New Roman Bold Italic", 18);
title.setMargin2(0, 0, 8, 8);

// Add a 2 pixels wide separator line just under the title
c.addLine(10, title.getHeight(), c.getWidth() - 11, title.getHeight(), Chart.LineColor, 2);

// Set donut center at (160, 175), and outer/inner radii as 110/55 pixels
c.setDonutSize(160, 175, 110, 55);

// Set the pie data and the pie labels
c.setData(data, labels);

// Use ring shading effect for the sectors
c.setSectorStyle(Chart.RingShading);

// Use the side label layout method, with the labels positioned 16 pixels from the donut bounding
// box
c.setLabelLayout(Chart.SideLayout, 16);

// Show only the sector number as the sector label
c.setLabelFormat("{={sector}+1}");

// Set the sector label style to Arial Bold 10pt, with a dark grey (444444) border
c.setLabelStyle("Arial Bold", 10).setBackground(Chart.Transparent, 0x444444);

// Add a legend box, with the center of the left side anchored at (330, 175), and using 10pt Arial
// Bold Italic font
LegendBox b = c.addLegend(330, 175, true, "Arial Bold Italic", 10);
b.setAlignment(Chart.Left);

// Set the legend box border to dark grey (444444), and with rounded conerns
b.setBackground(Chart.Transparent, 0x444444);
b.setRoundedCorners();

// Set the legend box margin to 16 pixels, and the extra line spacing between the legend entries as
// 5 pixels
b.setMargin(16);
b.setKeySpacing(0, 5);

// Set the legend text to show the sector number, followed by a 120 pixels wide block showing the
// sector label, and a 40 pixels wide block showing the percentage
b.setText(
    "<*block,valign=top*>{={sector}+1}.<*advanceTo=22*><*block,width=120*>{label}<*/*>" +
    "<*block,width=40,halign=right*>{percent}<*/*>%");

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

// Include tool tip for the chart
String imageMap1 = c.getHTMLImageMap("", "", "title='{label}: US${value}K ({percent}%)'");
%>
<html>
<body style="margin:5px 0px 0px 5px">
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    Donut 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/donut.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import ChartDirector.*;

public class donut implements DemoModule
{
    //Name of demo program
    public String toString() { return "Donut 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 pie chart
        double[] data = {25, 18, 15, 12, 8, 30, 35};

        // The labels for the pie chart
        String[] labels = {"Labor", "Licenses", "Taxes", "Legal", "Insurance", "Facilities",
            "Production"};

        // Create a PieChart object of size 600 x 320 pixels. Set background color to brushed
        // silver, with a 2 pixel 3D border. Use rounded corners of 20 pixels radius.
        PieChart c = new PieChart(600, 320, Chart.brushedSilverColor(), Chart.Transparent, 2);
        c.setRoundedFrame(0xffffff, 20);

        // Add a title using 18pt Times New Roman Bold Italic font. #Set top/bottom margins to 8
        // pixels.
        TextBox title = c.addTitle("Donut Chart Demonstration", "Times New Roman Bold Italic", 18);
        title.setMargin2(0, 0, 8, 8);

        // Add a 2 pixels wide separator line just under the title
        c.addLine(10, title.getHeight(), c.getWidth() - 11, title.getHeight(), Chart.LineColor, 2);

        // Set donut center at (160, 175), and outer/inner radii as 110/55 pixels
        c.setDonutSize(160, 175, 110, 55);

        // Set the pie data and the pie labels
        c.setData(data, labels);

        // Use ring shading effect for the sectors
        c.setSectorStyle(Chart.RingShading);

        // Use the side label layout method, with the labels positioned 16 pixels from the donut
        // bounding box
        c.setLabelLayout(Chart.SideLayout, 16);

        // Show only the sector number as the sector label
        c.setLabelFormat("{={sector}+1}");

        // Set the sector label style to Arial Bold 10pt, with a dark grey (444444) border
        c.setLabelStyle("Arial Bold", 10).setBackground(Chart.Transparent, 0x444444);

        // Add a legend box, with the center of the left side anchored at (330, 175), and using 10pt
        // Arial Bold Italic font
        LegendBox b = c.addLegend(330, 175, true, "Arial Bold Italic", 10);
        b.setAlignment(Chart.Left);

        // Set the legend box border to dark grey (444444), and with rounded conerns
        b.setBackground(Chart.Transparent, 0x444444);
        b.setRoundedCorners();

        // Set the legend box margin to 16 pixels, and the extra line spacing between the legend
        // entries as 5 pixels
        b.setMargin(16);
        b.setKeySpacing(0, 5);

        // Set the legend text to show the sector number, followed by a 120 pixels wide block
        // showing the sector label, and a 40 pixels wide block showing the percentage
        b.setText(
            "<*block,valign=top*>{={sector}+1}.<*advanceTo=22*><*block,width=120*>{label}<*/*>" +
            "<*block,width=40,halign=right*>{percent}<*/*>%");

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

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

    //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 donut();

        //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);
    }
}