ChartDirector 6.1 (Java Edition)

Multi-Cylinder Chart




This example demonstrates a multi-bar chart with cylinder shading effects. It also demonstrates using dotted line style for grid lines.

The cylinder shading effect is the result of using the cylinder bar shape in 2D. This is by using BarLayer.setBarShape with CircleShape.

The dotted grid lines in this example is configured by using BaseChart.dashLineColor to define the dotted line color, then use it in XYChart.setPlotArea as the the grid line color.

Source Code Listing

[JSP Version] jspdemo/multicylinder.jsp
<%@page import="ChartDirector.*" %>
<%
// Data for the chart
double[] data0 = {100, 125, 245, 147, 67, 96, 160, 145, 97, 167, 220, 125};
double[] data1 = {85, 156, 179, 211, 123, 225, 127, 99, 111, 260, 175, 156};
double[] data2 = {97, 87, 56, 267, 157, 157, 67, 156, 77, 87, 197, 87};
String[] labels = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", "Oct", "Nov",
    "Dec"};

// Create a XYChart object of size 560 x 280 pixels.
XYChart c = new XYChart(560, 280);

// Add a title to the chart using 14pt Arial Bold Italic font
c.addTitle("     Average Weekly Network Load", "Arial Bold Italic", 14);

// Set the plotarea at (50, 50) and of 500 x 200 pixels in size. Use alternating light grey (f8f8f8)
// / white (ffffff) background. Set border to transparent and use grey (CCCCCC) dotted lines as
// horizontal and vertical grid lines
c.setPlotArea(50, 50, 500, 200, 0xffffff, 0xf8f8f8, Chart.Transparent, c.dashLineColor(0xcccccc,
    Chart.DotLine), c.dashLineColor(0xcccccc, Chart.DotLine));

// Add a legend box at (50, 22) using horizontal layout. Use 10 pt Arial Bold Italic font, with
// transparent background
c.addLegend(50, 22, false, "Arial Bold Italic", 10).setBackground(Chart.Transparent);

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

// Draw the ticks between label positions (instead of at label positions)
c.xAxis().setTickOffset(0.5);

// Add axis title
c.yAxis().setTitle("Throughput (MBytes Per Hour)");

// Set axis line width to 2 pixels
c.xAxis().setWidth(2);
c.yAxis().setWidth(2);

// Add a multi-bar layer with 3 data sets
BarLayer layer = c.addBarLayer2(Chart.Side);
layer.addDataSet(data0, 0xff0000, "Server #1");
layer.addDataSet(data1, 0x00ff00, "Server #2");
layer.addDataSet(data2, 0x0000ff, "Server #3");

// Set bar shape to circular (cylinder)
layer.setBarShape(Chart.CircleShape);

// Configure the bars within a group to touch each others (no gap)
layer.setBarGap(0.2, Chart.TouchBar);

// 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">
    Multi-Cylinder 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/multicylinder.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import ChartDirector.*;

public class multicylinder implements DemoModule
{
    //Name of demo program
    public String toString() { return "Multi-Cylinder 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)
    {
        // Data for the chart
        double[] data0 = {100, 125, 245, 147, 67, 96, 160, 145, 97, 167, 220, 125};
        double[] data1 = {85, 156, 179, 211, 123, 225, 127, 99, 111, 260, 175, 156};
        double[] data2 = {97, 87, 56, 267, 157, 157, 67, 156, 77, 87, 197, 87};
        String[] labels = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", "Oct",
            "Nov", "Dec"};

        // Create a XYChart object of size 560 x 280 pixels.
        XYChart c = new XYChart(560, 280);

        // Add a title to the chart using 14pt Arial Bold Italic font
        c.addTitle("     Average Weekly Network Load", "Arial Bold Italic", 14);

        // Set the plotarea at (50, 50) and of 500 x 200 pixels in size. Use alternating light grey
        // (f8f8f8) / white (ffffff) background. Set border to transparent and use grey (CCCCCC)
        // dotted lines as horizontal and vertical grid lines
        c.setPlotArea(50, 50, 500, 200, 0xffffff, 0xf8f8f8, Chart.Transparent, c.dashLineColor(
            0xcccccc, Chart.DotLine), c.dashLineColor(0xcccccc, Chart.DotLine));

        // Add a legend box at (50, 22) using horizontal layout. Use 10 pt Arial Bold Italic font,
        // with transparent background
        c.addLegend(50, 22, false, "Arial Bold Italic", 10).setBackground(Chart.Transparent);

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

        // Draw the ticks between label positions (instead of at label positions)
        c.xAxis().setTickOffset(0.5);

        // Add axis title
        c.yAxis().setTitle("Throughput (MBytes Per Hour)");

        // Set axis line width to 2 pixels
        c.xAxis().setWidth(2);
        c.yAxis().setWidth(2);

        // Add a multi-bar layer with 3 data sets
        BarLayer layer = c.addBarLayer2(Chart.Side);
        layer.addDataSet(data0, 0xff0000, "Server #1");
        layer.addDataSet(data1, 0x00ff00, "Server #2");
        layer.addDataSet(data2, 0x0000ff, "Server #3");

        // Set bar shape to circular (cylinder)
        layer.setBarShape(Chart.CircleShape);

        // Configure the bars within a group to touch each others (no gap)
        layer.setBarGap(0.2, Chart.TouchBar);

        // 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 multicylinder();

        //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);
    }
}