ChartDirector 6.1 (Java Edition)

Polygon Bar Shapes




This example demonstrates bars of various polygonal shapes.

ChartDirector supports bars in cylindrical or arbitrary polygonal shapes. This is specified by using BarLayer.setBarShape and BarLayer.setBarShape2. In this example, various polygonal shapes are illustrated.

See Shape Specification on how built-in and custom shapes are defined in ChartDirector.

For demonstration, in this example each bar is of a different shape. BarLayer.setBarShape and BarLayer.setBarShape2 also supports setting the bar shapes based on data groups (or data sets) or data item position. For an example, see Multi-Shape Bar Chart.

Source Code Listing

[JSP Version] jspdemo/polygonbar.jsp
<%@page import="ChartDirector.*" %>
<%
// The data for the bar chart
double[] data = {85, 156, 179.5, 211, 123, 176, 195};

// The labels for the bar chart
String[] labels = {"Square", "Star(8)", "Polygon(6)", "Cross", "Cross2", "Diamond", "Custom"};

// Create a XYChart object of size 500 x 280 pixels.
XYChart c = new XYChart(500, 280);

// Set the plotarea at (50, 40) with alternating light grey (f8f8f8) / white (ffffff) background
c.setPlotArea(50, 40, 400, 200, 0xf8f8f8, 0xffffff);

// Add a title to the chart using 14pt Arial Bold Italic font
c.addTitle("    Bar Shape Demonstration", "Arial Bold Italic", 14);

// Add a multi-color bar chart layer
BarLayer layer = c.addBarLayer3(data);

// Set layer to 3D with 10 pixels 3D depth
layer.set3D(10);

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

// Set the first bar (index = 0) to square shape
layer.setBarShape(Chart.SquareShape, 0, 0);

// Set the second bar to 8-pointed star
layer.setBarShape(Chart.StarShape(8), 0, 1);

// Set the third bar to 6-sided polygon
layer.setBarShape(Chart.PolygonShape(6), 0, 2);

// Set the next 3 bars to cross shape, X shape and diamond shape
layer.setBarShape(Chart.CrossShape(), 0, 3);
layer.setBarShape(Chart.Cross2Shape(), 0, 4);
layer.setBarShape(Chart.DiamondShape, 0, 5);

// Set the last bar to a custom shape, specified as an array of (x, y) points in normalized
// coordinates
layer.setBarShape2(new int[]{-500, 0, 0, 500, 500, 0, 500, 1000, 0, 500, -500, 1000}, 0, 6);

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

// Add a title to the y axis
c.yAxis().setTitle("Frequency");

// Add a title to the x axis
c.xAxis().setTitle("Shapes");

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

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

public class polygonbar implements DemoModule
{
    //Name of demo program
    public String toString() { return "Polygon Bar Shapes"; }

    //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, 176, 195};

        // The labels for the bar chart
        String[] labels = {"Square", "Star(8)", "Polygon(6)", "Cross", "Cross2", "Diamond", "Custom"
            };

        // Create a XYChart object of size 500 x 280 pixels.
        XYChart c = new XYChart(500, 280);

        // Set the plotarea at (50, 40) with alternating light grey (f8f8f8) / white (ffffff)
        // background
        c.setPlotArea(50, 40, 400, 200, 0xf8f8f8, 0xffffff);

        // Add a title to the chart using 14pt Arial Bold Italic font
        c.addTitle("    Bar Shape Demonstration", "Arial Bold Italic", 14);

        // Add a multi-color bar chart layer
        BarLayer layer = c.addBarLayer3(data);

        // Set layer to 3D with 10 pixels 3D depth
        layer.set3D(10);

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

        // Set the first bar (index = 0) to square shape
        layer.setBarShape(Chart.SquareShape, 0, 0);

        // Set the second bar to 8-pointed star
        layer.setBarShape(Chart.StarShape(8), 0, 1);

        // Set the third bar to 6-sided polygon
        layer.setBarShape(Chart.PolygonShape(6), 0, 2);

        // Set the next 3 bars to cross shape, X shape and diamond shape
        layer.setBarShape(Chart.CrossShape(), 0, 3);
        layer.setBarShape(Chart.Cross2Shape(), 0, 4);
        layer.setBarShape(Chart.DiamondShape, 0, 5);

        // Set the last bar to a custom shape, specified as an array of (x, y) points in normalized
        // coordinates
        layer.setBarShape2(new int[]{-500, 0, 0, 500, 500, 0, 500, 1000, 0, 500, -500, 1000}, 0, 6);

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

        // Add a title to the y axis
        c.yAxis().setTitle("Frequency");

        // Add a title to the x axis
        c.xAxis().setTitle("Shapes");

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

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

    //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 polygonbar();

        //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);
    }
}