ChartDirector 6.1 (Java Edition)

3D Shadow Mode


      

This example demonstrates an alternative 3D drawing method that uses shadows.

The standard way to draw a pie chart in 3D is to view the chart from an inclined angle. Using this method, the surface of a 3D pie will become an ellipse.

ChartDirector supports an alternative way to draw a pie chart in 3D - to draw the 3D portion like a shadow. The 3D pie will remain perfectly circular, and the sector areas will correctly reflect its percentages.

The 3D drawing method is configured using PieChart.set3D.

Source Code Listing

[JSP Version] jspdemo/shadowpie.jsp
<%@page import="ChartDirector.*" %>
<%@page import="javax.servlet.http.*" %>
<%!
// A simple structure to represent a chart image with an image map
private static class ImageWithHotSpot
{
    String imageURL;
    String imageMap;
}

// Function to create the demo charts
ImageWithHotSpot createChart(HttpServletRequest request, int chartIndex)
{
    // the tilt angle of the pie
    int angle = chartIndex * 90 + 45;

    // The data for the pie chart
    double[] data = {25, 18, 15, 12, 8, 30, 35};

    // The labels for the pie chart
    String[] labels = {"Labor", "Licenses", "Taxes", "Legal", "Insurance", "Facilities",
        "Production"};

    // Create a PieChart object of size 110 x 110 pixels
    PieChart c = new PieChart(110, 110);

    // Set the center of the pie at (50, 55) and the radius to 36 pixels
    c.setPieSize(55, 55, 36);

    // Set the depth, tilt angle and 3D mode of the 3D pie (-1 means auto depth, "true" means the 3D
    // effect is in shadow mode)
    c.set3D(-1, angle, true);

    // Add a title showing the shadow angle
    c.addTitle("Shadow @ " + angle + " deg", "Arial", 8);

    // Set the pie data
    c.setData(data, labels);

    // Disable the sector labels by setting the color to Transparent
    c.setLabelStyle("", 8, Chart.Transparent);

    // Output the chart
    ImageWithHotSpot ret = new ImageWithHotSpot();
    ret.imageURL = c.makeSession(request, "chart" + chartIndex);

    // Include tool tip for the chart
    ret.imageMap = c.getHTMLImageMap("", "", "title='{label}: US${value}K ({percent}%)'");

    return ret;
}
%>
<%
ImageWithHotSpot chart0 = createChart(request, 0);
ImageWithHotSpot chart1 = createChart(request, 1);
ImageWithHotSpot chart2 = createChart(request, 2);
ImageWithHotSpot chart3 = createChart(request, 3);
%>
<html>
<body style="margin:5px 0px 0px 5px">
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    3D Shadow Mode
</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?"+chart0.imageURL)%>'
    usemap="#map0" border="0">
<map name="map0"><%=chart0.imageMap%></map>
<img src='<%=response.encodeURL("getchart.jsp?"+chart1.imageURL)%>'
    usemap="#map1" border="0">
<map name="map1"><%=chart1.imageMap%></map>
<img src='<%=response.encodeURL("getchart.jsp?"+chart2.imageURL)%>'
    usemap="#map2" border="0">
<map name="map2"><%=chart2.imageMap%></map>
<img src='<%=response.encodeURL("getchart.jsp?"+chart3.imageURL)%>'
    usemap="#map3" border="0">
<map name="map3"><%=chart3.imageMap%></map>
</body>
</html>

[Java Version] javademo/shadowpie.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import ChartDirector.*;

public class shadowpie implements DemoModule
{
    //Name of demo program
    public String toString() { return "3D Shadow Mode"; }

    //Number of charts produced in this demo
    public int getNoOfCharts() { return 4; }

    //Main code for creating charts
    public void createChart(ChartViewer viewer, int chartIndex)
    {
        // the tilt angle of the pie
        int angle = chartIndex * 90 + 45;

        // The data for the pie chart
        double[] data = {25, 18, 15, 12, 8, 30, 35};

        // The labels for the pie chart
        String[] labels = {"Labor", "Licenses", "Taxes", "Legal", "Insurance", "Facilities",
            "Production"};

        // Create a PieChart object of size 110 x 110 pixels
        PieChart c = new PieChart(110, 110);

        // Set the center of the pie at (50, 55) and the radius to 36 pixels
        c.setPieSize(55, 55, 36);

        // Set the depth, tilt angle and 3D mode of the 3D pie (-1 means auto depth, "true" means
        // the 3D effect is in shadow mode)
        c.set3D(-1, angle, true);

        // Add a title showing the shadow angle
        c.addTitle("Shadow @ " + angle + " deg", "Arial", 8);

        // Set the pie data
        c.setData(data, labels);

        // Disable the sector labels by setting the color to Transparent
        c.setLabelStyle("", 8, Chart.Transparent);

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

        //include tool tip for the chart
        viewer.setImageMap(c.getHTMLImageMap("clickable", "",
            "title='{label}: US${value}K ({percent}%)'"));
    }

    //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 shadowpie();

        //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);
        frame.getContentPane().setLayout(new FlowLayout(FlowLayout.LEFT));
        frame.setSize(800, 450);

        // Create the charts and put them in the content pane
        for (int i = 0; i < demo.getNoOfCharts(); ++i)
        {
            ChartViewer viewer = new ChartViewer();
            demo.createChart(viewer, i);
            frame.getContentPane().add(viewer);
        }

        // Display the window
        frame.setVisible(true);
    }
}