ChartDirector 6.1 (Java Edition)

Depth Bar Chart




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

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

Source Code Listing

[JSP Version] jspdemo/depthbar.jsp
<%@page import="ChartDirector.*" %>
<%
// The data for the bar chart
double[] data0 = {100, 125, 245, 147, 67};
double[] data1 = {85, 156, 179, 211, 123};
double[] data2 = {97, 87, 56, 267, 157};

// The labels for the bar chart
String[] labels = {"Mon", "Tue", "Wed", "Thu", "Fri"};

// Create a XYChart object of size 500 x 320 pixels
XYChart c = new XYChart(500, 320);

// Set the plotarea at (100, 40) and of size 280 x 240 pixels
c.setPlotArea(100, 40, 280, 240);

// Add a legend box at (405, 100)
c.addLegend(405, 100);

// Add a title to the chart
c.addTitle("Weekday Network Load");

// Add a title to the y axis. Draw the title upright (font angle = 0)
c.yAxis().setTitle("Average\nWorkload\n(MBytes\nPer Hour)").setFontAngle(0);

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

// Add three bar layers, each representing one data set. The bars are drawn in semi-transparent
// colors.
c.addBarLayer(data0, 0x808080ff, "Server # 1", 5);
c.addBarLayer(data1, 0x80ff0000, "Server # 2", 5);
c.addBarLayer(data2, 0x8000ff00, "Server # 3", 5);

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

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

public class depthbar implements DemoModule
{
    //Name of demo program
    public String toString() { return "Depth Bar 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 bar chart
        double[] data0 = {100, 125, 245, 147, 67};
        double[] data1 = {85, 156, 179, 211, 123};
        double[] data2 = {97, 87, 56, 267, 157};

        // The labels for the bar chart
        String[] labels = {"Mon", "Tue", "Wed", "Thu", "Fri"};

        // Create a XYChart object of size 500 x 320 pixels
        XYChart c = new XYChart(500, 320);

        // Set the plotarea at (100, 40) and of size 280 x 240 pixels
        c.setPlotArea(100, 40, 280, 240);

        // Add a legend box at (405, 100)
        c.addLegend(405, 100);

        // Add a title to the chart
        c.addTitle("Weekday Network Load");

        // Add a title to the y axis. Draw the title upright (font angle = 0)
        c.yAxis().setTitle("Average\nWorkload\n(MBytes\nPer Hour)").setFontAngle(0);

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

        // Add three bar layers, each representing one data set. The bars are drawn in
        // semi-transparent colors.
        c.addBarLayer(data0, 0x808080ff, "Server # 1", 5);
        c.addBarLayer(data1, 0x80ff0000, "Server # 2", 5);
        c.addBarLayer(data2, 0x8000ff00, "Server # 3", 5);

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

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

    //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 depthbar();

        //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);
    }
}