ChartDirector 6.1 (Java Edition)

Simple Bar Chart (1)




This example demonstrates the basic steps in creating bar charts.

Source Code Listing

[JSP Version] jspdemo/simplebar.jsp
<%@page import="ChartDirector.*" %>
<%
// The data for the bar chart
double[] data = {85, 156, 179.5, 211, 123};

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

// Create a XYChart object of size 250 x 250 pixels
XYChart c = new XYChart(250, 250);

// Set the plotarea at (30, 20) and of size 200 x 200 pixels
c.setPlotArea(30, 20, 200, 200);

// Add a bar chart layer using the given data
c.addBarLayer(data);

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

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

// Include tool tip for the chart
String imageMap1 = c.getHTMLImageMap("", "", "title='{xLabel}: {value} GBytes'");
%>
<html>
<body style="margin:5px 0px 0px 5px">
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    Simple Bar Chart (1)
</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/simplebar.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import ChartDirector.*;

public class simplebar implements DemoModule
{
    //Name of demo program
    public String toString() { return "Simple Bar Chart (1)"; }

    //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[] data = {85, 156, 179.5, 211, 123};

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

        // Create a XYChart object of size 250 x 250 pixels
        XYChart c = new XYChart(250, 250);

        // Set the plotarea at (30, 20) and of size 200 x 200 pixels
        c.setPlotArea(30, 20, 200, 200);

        // Add a bar chart layer using the given data
        c.addBarLayer(data);

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

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

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

    //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 simplebar();

        //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);
    }
}