ChartDirector 6.1 (Java Edition)

Multi-Color Bar Chart (2)




This example extends the Multi-Color Bar Chart (1) example by decorating the the bars with rounded corners and gradient shading.

Source Code Listing

[JSP Version] jspdemo/colorbar2.jsp
<%@page import="ChartDirector.*" %>
<%
// The data for the bar chart
double[] data = {85, 156, 179, 211, 123, 189, 166};

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

// The colors for the bars
int[] colors = {0x5588bb, 0x66bbbb, 0xaa6644, 0x99bb55, 0xee9944, 0x444466, 0xbb5555};

// Create a XYChart object of size 600 x 360 pixels
XYChart c = new XYChart(600, 360);

// Set the plotarea at (70, 20) and of size 500 x 300 pixels, with transparent background and border
// and light grey (0xcccccc) horizontal grid lines
c.setPlotArea(70, 20, 500, 300, Chart.Transparent, -1, Chart.Transparent, 0xcccccc);

// Set the x and y axis stems to transparent and the label font to 12pt Arial
c.xAxis().setColors(Chart.Transparent);
c.yAxis().setColors(Chart.Transparent);
c.xAxis().setLabelStyle("Arial", 12);
c.yAxis().setLabelStyle("Arial", 12);

// Add a multi-color bar chart layer using the given data
BarLayer layer = c.addBarLayer3(data, colors);

// Use bar gradient lighting with the light intensity from 0.8 to 1.15
layer.setBorderColor(Chart.Transparent, Chart.barLighting(0.8, 1.15));

// Set rounded corners for bars
layer.setRoundedCorners();

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

// For the automatic y-axis labels, set the minimum spacing to 40 pixels.
c.yAxis().setTickDensity(40);

// Add a title to the y axis using dark grey (0x555555) 14pt Arial font
c.yAxis().setTitle("Y-Axis Title Placeholder", "Arial", 14, 0x555555);

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

// Include tool tip for the chart
String imageMap1 = c.getHTMLImageMap("", "", "title='{xLabel}: ${value}M'");
%>
<html>
<body style="margin:5px 0px 0px 5px">
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    Multi-Color Bar Chart (2)
</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/colorbar2.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import ChartDirector.*;

public class colorbar2 implements DemoModule
{
    //Name of demo program
    public String toString() { return "Multi-Color Bar Chart (2)"; }

    //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, 211, 123, 189, 166};

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

        // The colors for the bars
        int[] colors = {0x5588bb, 0x66bbbb, 0xaa6644, 0x99bb55, 0xee9944, 0x444466, 0xbb5555};

        // Create a XYChart object of size 600 x 360 pixels
        XYChart c = new XYChart(600, 360);

        // Set the plotarea at (70, 20) and of size 500 x 300 pixels, with transparent background
        // and border and light grey (0xcccccc) horizontal grid lines
        c.setPlotArea(70, 20, 500, 300, Chart.Transparent, -1, Chart.Transparent, 0xcccccc);

        // Set the x and y axis stems to transparent and the label font to 12pt Arial
        c.xAxis().setColors(Chart.Transparent);
        c.yAxis().setColors(Chart.Transparent);
        c.xAxis().setLabelStyle("Arial", 12);
        c.yAxis().setLabelStyle("Arial", 12);

        // Add a multi-color bar chart layer using the given data
        BarLayer layer = c.addBarLayer3(data, colors);

        // Use bar gradient lighting with the light intensity from 0.8 to 1.15
        layer.setBorderColor(Chart.Transparent, Chart.barLighting(0.8, 1.15));

        // Set rounded corners for bars
        layer.setRoundedCorners();

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

        // For the automatic y-axis labels, set the minimum spacing to 40 pixels.
        c.yAxis().setTickDensity(40);

        // Add a title to the y axis using dark grey (0x555555) 14pt Arial font
        c.yAxis().setTitle("Y-Axis Title Placeholder", "Arial", 14, 0x555555);

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

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

    //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 colorbar2();

        //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);
    }
}