ChartDirector 6.1 (Java Edition)

Stacked Area Chart




This example demonstrates using multiple data sets to create stacked area chart.

The key features demonstrated in this example are:

Source Code Listing

[JSP Version] jspdemo/stackedarea.jsp
<%@page import="ChartDirector.*" %>
<%
// The data for the area chart
double[] data0 = {42, 49, 33, 38, 51, 46, 29, 41, 44, 57, 59, 52, 37, 34, 51, 56, 56, 60, 70, 76,
    63, 67, 75, 64, 51};
double[] data1 = {50, 45, 47, 34, 42, 49, 63, 62, 73, 59, 56, 50, 64, 60, 67, 67, 58, 59, 73, 77,
    84, 82, 80, 84, 89};
double[] data2 = {61, 79, 85, 66, 53, 39, 24, 21, 37, 56, 37, 22, 21, 33, 13, 17, 4, 23, 16, 25, 9,
    10, 5, 7, 16};
String[] labels = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14",
    "15", "16", "17", "18", "19", "20", "21", "22", "23", "24"};

// Create a XYChart object of size 300 x 210 pixels. Set the background to pale yellow (0xffffc0)
// with a black border (0x0)
XYChart c = new XYChart(300, 210, 0xffffc0, 0x000000);

// Set the plotarea at (50, 30) and of size 240 x 140 pixels. Use white (0xffffff) background.
c.setPlotArea(50, 30, 240, 140).setBackground(0xffffff);

// Add a legend box at (50, 185) (below of plot area) using horizontal layout. Use 8pt Arial font
// with Transparent background.
c.addLegend(50, 185, false, "", 8).setBackground(Chart.Transparent);

// Add a title box to the chart using 8pt Arial Bold font, with yellow (0xffff40) background and a
// black border (0x0)
c.addTitle("Sales Volume", "Arial Bold", 8).setBackground(0xffff40, 0);

// Set the y axis label format to US$nnnn
c.yAxis().setLabelFormat("US${value}");

// Set the labels on the x axis.
c.xAxis().setLabels(labels);

// Display 1 out of 2 labels on the x-axis. Show minor ticks for remaining labels.
c.xAxis().setLabelStep(2, 1);

// Add an stack area layer with three data sets
AreaLayer layer = c.addAreaLayer2(Chart.Stack);
layer.addDataSet(data0, 0x4040ff, "Store #1");
layer.addDataSet(data1, 0xff4040, "Store #2");
layer.addDataSet(data2, 0x40ff40, "Store #3");

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

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

public class stackedarea implements DemoModule
{
    //Name of demo program
    public String toString() { return "Stacked Area 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 area chart
        double[] data0 = {42, 49, 33, 38, 51, 46, 29, 41, 44, 57, 59, 52, 37, 34, 51, 56, 56, 60,
            70, 76, 63, 67, 75, 64, 51};
        double[] data1 = {50, 45, 47, 34, 42, 49, 63, 62, 73, 59, 56, 50, 64, 60, 67, 67, 58, 59,
            73, 77, 84, 82, 80, 84, 89};
        double[] data2 = {61, 79, 85, 66, 53, 39, 24, 21, 37, 56, 37, 22, 21, 33, 13, 17, 4, 23, 16,
            25, 9, 10, 5, 7, 16};
        String[] labels = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13",
            "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24"};

        // Create a XYChart object of size 300 x 210 pixels. Set the background to pale yellow
        // (0xffffc0) with a black border (0x0)
        XYChart c = new XYChart(300, 210, 0xffffc0, 0x000000);

        // Set the plotarea at (50, 30) and of size 240 x 140 pixels. Use white (0xffffff)
        // background.
        c.setPlotArea(50, 30, 240, 140).setBackground(0xffffff);

        // Add a legend box at (50, 185) (below of plot area) using horizontal layout. Use 8pt Arial
        // font with Transparent background.
        c.addLegend(50, 185, false, "", 8).setBackground(Chart.Transparent);

        // Add a title box to the chart using 8pt Arial Bold font, with yellow (0xffff40) background
        // and a black border (0x0)
        c.addTitle("Sales Volume", "Arial Bold", 8).setBackground(0xffff40, 0);

        // Set the y axis label format to US$nnnn
        c.yAxis().setLabelFormat("US${value}");

        // Set the labels on the x axis.
        c.xAxis().setLabels(labels);

        // Display 1 out of 2 labels on the x-axis. Show minor ticks for remaining labels.
        c.xAxis().setLabelStep(2, 1);

        // Add an stack area layer with three data sets
        AreaLayer layer = c.addAreaLayer2(Chart.Stack);
        layer.addDataSet(data0, 0x4040ff, "Store #1");
        layer.addDataSet(data1, 0xff4040, "Store #2");
        layer.addDataSet(data2, 0x40ff40, "Store #3");

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

        //include tool tip for the chart
        viewer.setImageMap(c.getHTMLImageMap("clickable", "",
            "title='{dataSetName} sales at hour {xLabel}: US${value}K'"));
    }

    //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 stackedarea();

        //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);
    }
}