ChartDirector 6.1 (Java Edition)

Depth Area Chart




This example demonstrates using multiple area layers with semi-transparent colors to create a depth area chart.

ChartDirector allows an XYChart to containing multiple layers of the same or different types. In this example, all layers are 3D area layers. The areas are filled using semi-transparent colors to avoid the area on the front hiding the areas at the back.

Source Code Listing

[JSP Version] jspdemo/deptharea.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, 55, 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 = {87, 89, 85, 66, 53, 39, 24, 21, 37, 56, 37, 22, 21, 33, 13, 17, 4, 23, 16, 25, 9,
    10, 5, 7, 6};
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 350 x 230 pixels
XYChart c = new XYChart(350, 230);

// Set the plotarea at (50, 30) and of size 250 x 150 pixels.
c.setPlotArea(50, 30, 250, 150);

// Add a legend box at (55, 0) (top of the chart) using 8pt Arial Font. Set background and border to
// Transparent.
c.addLegend(55, 0, false, "", 8).setBackground(Chart.Transparent);

// Add a title to the x axis
c.xAxis().setTitle("Network Load for Jun 12");

// Add a title to the y axis
c.yAxis().setTitle("MBytes");

// 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 three area layers, each representing one data set. The areas are drawn in semi-transparent
// colors.
c.addAreaLayer(data2, 0x808080ff, "Server #1", 3);
c.addAreaLayer(data0, 0x80ff0000, "Server #2", 3);
c.addAreaLayer(data1, 0x8000ff00, "Server #3", 3);

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

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

public class deptharea implements DemoModule
{
    //Name of demo program
    public String toString() { return "Depth 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, 55, 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 = {87, 89, 85, 66, 53, 39, 24, 21, 37, 56, 37, 22, 21, 33, 13, 17, 4, 23, 16,
            25, 9, 10, 5, 7, 6};
        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 350 x 230 pixels
        XYChart c = new XYChart(350, 230);

        // Set the plotarea at (50, 30) and of size 250 x 150 pixels.
        c.setPlotArea(50, 30, 250, 150);

        // Add a legend box at (55, 0) (top of the chart) using 8pt Arial Font. Set background and
        // border to Transparent.
        c.addLegend(55, 0, false, "", 8).setBackground(Chart.Transparent);

        // Add a title to the x axis
        c.xAxis().setTitle("Network Load for Jun 12");

        // Add a title to the y axis
        c.yAxis().setTitle("MBytes");

        // 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 three area layers, each representing one data set. The areas are drawn in
        // semi-transparent colors.
        c.addAreaLayer(data2, 0x808080ff, "Server #1", 3);
        c.addAreaLayer(data0, 0x80ff0000, "Server #2", 3);
        c.addAreaLayer(data1, 0x8000ff00, "Server #3", 3);

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

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

    //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 deptharea();

        //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);
    }
}