ChartDirector 6.1 (Java Edition)

Arbitrary XY Line Chart




This example demonstrates drawing a line chart with arbitrary x coordinates (not increasing or decreasing in one direction), and adding custom data labels to data points.

The x values of the data points are set into the chart using Layer.setXData. ChartDirector merely joins the points together with lines. It does not require the points to following any particular direction.

Note that this example has special labels for the start and end points of the lines. They are created using Layer.addCustomDataLabel.

Source Code Listing

[JSP Version] jspdemo/xyline.jsp
<%@page import="ChartDirector.*" %>
<%
// The (x, y) data for the first line
double[] dataX0 = {20, 90, 40, 30, 12};
double[] dataY0 = {10, 40, 75, 54, 20};

// The (x, y) data for the second line
double[] dataX1 = {10, 40, 75, 54, 60};
double[] dataY1 = {50, 90, 40, 30, 10};

// Create a XYChart object of size 450 x 450 pixels
XYChart c = new XYChart(450, 450);

// Set the plotarea at (55, 65) and of size 350 x 300 pixels, with white background and a light grey
// border (0xc0c0c0). Turn on both horizontal and vertical grid lines with light grey color
// (0xc0c0c0)
c.setPlotArea(55, 65, 350, 300, 0xffffff, -1, 0xc0c0c0, 0xc0c0c0, -1);

// Add a legend box at (50, 30) (top of the chart) with horizontal layout. Use 12pt Times Bold
// Italic font. Set the background and border color to Transparent.
c.addLegend(50, 30, false, "Times New Roman Bold Italic", 12).setBackground(Chart.Transparent);

// Add a title to the chart using 18pt Times Bold Itatic font
c.addTitle("Reaction Path", "Times New Roman Bold Italic", 18);

// Add a title to the y axis using 12pt Arial Bold Italic font
c.yAxis().setTitle("Temperature (Celcius)", "Arial Bold Italic", 12);

// Set the y axis line width to 3 pixels
c.yAxis().setWidth(3);

// Add a title to the x axis using 12pt Arial Bold Italic font
c.xAxis().setTitle("Pressure (Pa)", "Arial Bold Italic", 12);

// Set the x axis line width to 3 pixels
c.xAxis().setWidth(3);

// Add a red (0xff3333) line layer using dataX0 and dataY0
LineLayer layer1 = c.addLineLayer(dataY0, 0xff3333, "Compound AAA");
layer1.setXData(dataX0);

// Set the line width to 3 pixels
layer1.setLineWidth(3);

// Use 9 pixel square symbols for the data points
layer1.getDataSet(0).setDataSymbol(Chart.SquareSymbol, 9);

// Add custom text labels to the first and last point on the scatter plot using Arial Bold font
layer1.addCustomDataLabel(0, 0, "Start", "Arial Bold");
layer1.addCustomDataLabel(0, 4, "End", "Arial Bold");

// Add a green (0x33ff33) line layer using dataX1 and dataY1
LineLayer layer2 = c.addLineLayer(dataY1, 0x33ff33, "Compound BBB");
layer2.setXData(dataX1);

// Set the line width to 3 pixels
layer2.setLineWidth(3);

// Use 11 pixel diamond symbols for the data points
layer2.getDataSet(0).setDataSymbol(Chart.DiamondSymbol, 11);

// Add custom text labels to the first and last point on the scatter plot using Arial Bold font
layer2.addCustomDataLabel(0, 0, "Start", "Arial Bold");
layer2.addCustomDataLabel(0, 4, "End", "Arial Bold");

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

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

public class xyline implements DemoModule
{
    //Name of demo program
    public String toString() { return "Arbitrary XY Line 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)
    {
        // The (x, y) data for the first line
        double[] dataX0 = {20, 90, 40, 30, 12};
        double[] dataY0 = {10, 40, 75, 54, 20};

        // The (x, y) data for the second line
        double[] dataX1 = {10, 40, 75, 54, 60};
        double[] dataY1 = {50, 90, 40, 30, 10};

        // Create a XYChart object of size 450 x 450 pixels
        XYChart c = new XYChart(450, 450);

        // Set the plotarea at (55, 65) and of size 350 x 300 pixels, with white background and a
        // light grey border (0xc0c0c0). Turn on both horizontal and vertical grid lines with light
        // grey color (0xc0c0c0)
        c.setPlotArea(55, 65, 350, 300, 0xffffff, -1, 0xc0c0c0, 0xc0c0c0, -1);

        // Add a legend box at (50, 30) (top of the chart) with horizontal layout. Use 12pt Times
        // Bold Italic font. Set the background and border color to Transparent.
        c.addLegend(50, 30, false, "Times New Roman Bold Italic", 12).setBackground(
            Chart.Transparent);

        // Add a title to the chart using 18pt Times Bold Itatic font
        c.addTitle("Reaction Path", "Times New Roman Bold Italic", 18);

        // Add a title to the y axis using 12pt Arial Bold Italic font
        c.yAxis().setTitle("Temperature (Celcius)", "Arial Bold Italic", 12);

        // Set the y axis line width to 3 pixels
        c.yAxis().setWidth(3);

        // Add a title to the x axis using 12pt Arial Bold Italic font
        c.xAxis().setTitle("Pressure (Pa)", "Arial Bold Italic", 12);

        // Set the x axis line width to 3 pixels
        c.xAxis().setWidth(3);

        // Add a red (0xff3333) line layer using dataX0 and dataY0
        LineLayer layer1 = c.addLineLayer(dataY0, 0xff3333, "Compound AAA");
        layer1.setXData(dataX0);

        // Set the line width to 3 pixels
        layer1.setLineWidth(3);

        // Use 9 pixel square symbols for the data points
        layer1.getDataSet(0).setDataSymbol(Chart.SquareSymbol, 9);

        // Add custom text labels to the first and last point on the scatter plot using Arial Bold
        // font
        layer1.addCustomDataLabel(0, 0, "Start", "Arial Bold");
        layer1.addCustomDataLabel(0, 4, "End", "Arial Bold");

        // Add a green (0x33ff33) line layer using dataX1 and dataY1
        LineLayer layer2 = c.addLineLayer(dataY1, 0x33ff33, "Compound BBB");
        layer2.setXData(dataX1);

        // Set the line width to 3 pixels
        layer2.setLineWidth(3);

        // Use 11 pixel diamond symbols for the data points
        layer2.getDataSet(0).setDataSymbol(Chart.DiamondSymbol, 11);

        // Add custom text labels to the first and last point on the scatter plot using Arial Bold
        // font
        layer2.addCustomDataLabel(0, 0, "Start", "Arial Bold");
        layer2.addCustomDataLabel(0, 4, "End", "Arial Bold");

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

        //include tool tip for the chart
        viewer.setImageMap(c.getHTMLImageMap("clickable", "",
            "title='[{dataSetName}] Pressure = {x} Pa, Temperature = {value} C'"));
    }

    //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 xyline();

        //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);
    }
}