ChartDirector 6.1 (Java Edition)

4 Quadrant Chart




This example demonstrates 4 quadrant charts in which the x-axis and y-axis meet at the origin at the center of the plot area.

By default, ChartDirector puts the axes at the border of the plot area. This avoids the axis labels and the chart contents from overlapping and making the chart hard to read.

In some cases, it may be desirable to have one or both axes to intersect with the zero point of the other axis, where the zero point can be inside the plot area. In ChartDirector, these kinds of axis configurations may be set up with XYChart.setAxisAtOrigin.

This example also demonstrates using PlotArea.set4QBgColor to specify 4 background colors for the 4 quadrants.

Source Code Listing

[JSP Version] jspdemo/fourq.jsp
<%@page import="ChartDirector.*" %>
<%
// XY points for the scatter chart
double[] dataX0 = {10, 15, 6, -12, 14, -8, 13, -13, 16, 12, 10.5};
double[] dataY0 = {130, 150, 80, 110, -110, -105, -130, 115, -170, 125, 125};

double[] dataX1 = {6, 7, -4, 3.5, 7, 8, -9, -10, -12, 11, 8};
double[] dataY1 = {65, -40, -40, 45, -70, -80, 80, 10, -100, 105, 60};

double[] dataX2 = {-10, -12, 11, 8, 6, 12, -4, 3.5, 7, 8, -9};
double[] dataY2 = {65, -80, -40, 45, -70, -80, 80, 90, -100, 105, 60};

// Create a XYChart object of size 600 x 300 pixels, with a light blue (ccccff) background, a black
// border, and 1 pixel 3D border effect
XYChart c = new XYChart(600, 480, 0xccccff, 0x000000, 1);

// Add a title box to the chart using 16pt Arial Bold Italic font, with white text on deep blue
// background
c.addTitle("Four Quadrant Chart Demonstration", "Arial Bold Italic", 16, 0xffffff).setBackground(
    0x000080);

// Set the plotarea at (20, 60) and of size 560 x 360 pixels, with grey (808080) border, and light
// grey (c0c0c0) horizontal and vertical grid lines. Set 4 quadrant coloring, where the colors of
// the quadrants alternate between lighter and deeper grey (dddddd/eeeeee)
c.setPlotArea(20, 60, 560, 360, -1, -1, 0x808080, 0xc0c0c0, 0xc0c0c0).set4QBgColor(0xdddddd,
    0xeeeeee, 0xdddddd, 0xeeeeee);

// Set 4 quadrant mode, with both x and y axes symetrical around the origin
c.setAxisAtOrigin(Chart.XYAxisAtOrigin, Chart.XAxisSymmetric + Chart.YAxisSymmetric);

// Add a legend box at (300, 460) (bottom center of the chart) with horizontal layout. Use 8pt Arial
// Bold font.
LegendBox legendBox = c.addLegend(300, 460, false, "Arial Bold", 8);
legendBox.setAlignment(Chart.BottomCenter);

// Set legend box background to light grey (dddddd) with a black border
legendBox.setBackground(0xdddddd, 0);

// Set left/right margin to 20 pixels and top/bottom margin to 5 pixels
legendBox.setMargin2(20, 20, 5, 5);

// Add a titles to axes
c.xAxis().setTitle("Alpha Index");
c.yAxis().setTitle("Beta Index");

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

// Add scatter layer, using 15 pixels red (ff33333) X shape symbols
c.addScatterLayer(dataX0, dataY0, "Group A", Chart.Cross2Shape(), 15, 0xff3333);

// Add scatter layer, using 15 pixels green (33ff33) 6-sided polygon symbols
c.addScatterLayer(dataX1, dataY1, "Group B", Chart.PolygonShape(6), 15, 0x33ff33);

// Add scatter layer, using 15 pixels blue (3333ff) triangle symbols
c.addScatterLayer(dataX2, dataY2, "Group C", Chart.TriangleSymbol, 15, 0x3333ff);

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

// Include tool tip for the chart
String imageMap1 = c.getHTMLImageMap("", "", "title='[{dataSetName}] Alpha = {x}, Beta = {value}'");
%>
<html>
<body style="margin:5px 0px 0px 5px">
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    4 Quadrant 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/fourq.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import ChartDirector.*;

public class fourq implements DemoModule
{
    //Name of demo program
    public String toString() { return "4 Quadrant 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)
    {
        // XY points for the scatter chart
        double[] dataX0 = {10, 15, 6, -12, 14, -8, 13, -13, 16, 12, 10.5};
        double[] dataY0 = {130, 150, 80, 110, -110, -105, -130, 115, -170, 125, 125};

        double[] dataX1 = {6, 7, -4, 3.5, 7, 8, -9, -10, -12, 11, 8};
        double[] dataY1 = {65, -40, -40, 45, -70, -80, 80, 10, -100, 105, 60};

        double[] dataX2 = {-10, -12, 11, 8, 6, 12, -4, 3.5, 7, 8, -9};
        double[] dataY2 = {65, -80, -40, 45, -70, -80, 80, 90, -100, 105, 60};

        // Create a XYChart object of size 600 x 300 pixels, with a light blue (ccccff) background,
        // a black border, and 1 pixel 3D border effect
        XYChart c = new XYChart(600, 480, 0xccccff, 0x000000, 1);

        // Add a title box to the chart using 16pt Arial Bold Italic font, with white text on deep
        // blue background
        c.addTitle("Four Quadrant Chart Demonstration", "Arial Bold Italic", 16, 0xffffff
            ).setBackground(0x000080);

        // Set the plotarea at (20, 60) and of size 560 x 360 pixels, with grey (808080) border, and
        // light grey (c0c0c0) horizontal and vertical grid lines. Set 4 quadrant coloring, where
        // the colors of the quadrants alternate between lighter and deeper grey (dddddd/eeeeee)
        c.setPlotArea(20, 60, 560, 360, -1, -1, 0x808080, 0xc0c0c0, 0xc0c0c0).set4QBgColor(0xdddddd,
            0xeeeeee, 0xdddddd, 0xeeeeee);

        // Set 4 quadrant mode, with both x and y axes symetrical around the origin
        c.setAxisAtOrigin(Chart.XYAxisAtOrigin, Chart.XAxisSymmetric + Chart.YAxisSymmetric);

        // Add a legend box at (300, 460) (bottom center of the chart) with horizontal layout. Use
        // 8pt Arial Bold font.
        LegendBox legendBox = c.addLegend(300, 460, false, "Arial Bold", 8);
        legendBox.setAlignment(Chart.BottomCenter);

        // Set legend box background to light grey (dddddd) with a black border
        legendBox.setBackground(0xdddddd, 0);

        // Set left/right margin to 20 pixels and top/bottom margin to 5 pixels
        legendBox.setMargin2(20, 20, 5, 5);

        // Add a titles to axes
        c.xAxis().setTitle("Alpha Index");
        c.yAxis().setTitle("Beta Index");

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

        // Add scatter layer, using 15 pixels red (ff33333) X shape symbols
        c.addScatterLayer(dataX0, dataY0, "Group A", Chart.Cross2Shape(), 15, 0xff3333);

        // Add scatter layer, using 15 pixels green (33ff33) 6-sided polygon symbols
        c.addScatterLayer(dataX1, dataY1, "Group B", Chart.PolygonShape(6), 15, 0x33ff33);

        // Add scatter layer, using 15 pixels blue (3333ff) triangle symbols
        c.addScatterLayer(dataX2, dataY2, "Group C", Chart.TriangleSymbol, 15, 0x3333ff);

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

        //include tool tip for the chart
        viewer.setImageMap(c.getHTMLImageMap("clickable", "",
            "title='[{dataSetName}] Alpha = {x}, Beta = {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 fourq();

        //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);
    }
}