ChartDirector 6.1 (Java Edition)

Enhanced Area Chart




This example extends the Simple Area Chart example by decorating the chart using a number of chart formatting features.

Source Code Listing

[JSP Version] jspdemo/enhancedarea.jsp
<%@page import="ChartDirector.*" %>
<%
// The data for the area chart
double[] data = {30, 28, 40, 55, 75, 68, 54, 60, 50, 62, 75, 65, 75, 89, 60, 55, 53, 35, 50, 66, 56,
    48, 52, 65, 62};

// The labels for the area chart
String[] labels = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14",
    "15", "16", "17", "18", "19", "20", "21", "22", "23", "24"};

// Create a XYChart object of size 600 x 360 pixels, with a brushed silver background, 1 pixel 3D
// border effect, rounded corners and soft drop shadow.
XYChart c = new XYChart(600, 360, Chart.brushedSilverColor(), Chart.Transparent, 1);
c.setRoundedFrame();
c.setDropShadow();

//Set search path to current JSP directory for loading icon images
c.setSearchPath(getServletConfig().getServletContext(), request);

// Add a title box to the chart using 18pt Times Bold Italic font.
TextBox title = c.addTitle(
    "<*block,valign=absmiddle*><*img=star.png*><*img=star.png*> Performance Enhancer " +
    "<*img=star.png*><*img=star.png*><*/*>", "Times New Roman Bold Italic", 18);

//
// Use a text box with a depressed 3D border to create the inner depressed region
//

// The width of the frame border
int frameWidth = 5;

// Set the depressed region position
TextBox contentBox = c.addText(frameWidth, title.getHeight(), "");
contentBox.setSize(c.getDrawArea().getWidth() - 1 - frameWidth * 2, c.getDrawArea().getHeight() -
    title.getHeight() - frameWidth - 1);

// Use -1 as the rasied effect to create a depressed region
contentBox.setBackground(Chart.Transparent, Chart.Transparent, -1);

// Set rounded corners, and put the text box at the back of the chart
contentBox.setRoundedCorners(10);
contentBox.setZOrder(Chart.ChartBackZ);

// Tentatively set the plotarea to 50 pixels from the left depressed edge, and 25 pixels under the
// top depressed edge. Set the width to 75 pixels less than the depressed region width, and the
// height to 75 pixels less than the depressed region height. Use white (ffffff) background,
// transparent border, and grey (cccccc) horizontal and vertical grid lines.
PlotArea plotArea = c.setPlotArea(50 + contentBox.getLeftX(), contentBox.getTopY() + 25,
    contentBox.getWidth() - 75, contentBox.getHeight() - 75, 0xffffff, -1, -1, 0xcccccc, -1);

// Add a title to the y axis
c.yAxis().setTitle("Energy Concentration (KJ per liter)");

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

// Display 1 out of 3 labels on the x-axis.
c.xAxis().setLabelStep(3);

// Add a title to the x axis using CDML
c.xAxis().setTitle("<*block,valign=absmiddle*><*img=clock.png*>  Elapsed Time (hour)<*/*>");

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

// Add an area layer to the chart using a gradient color that changes vertically from
// semi-transparent red (60ff0000) to semi-transparent white (60ffffff)
c.addAreaLayer(data, c.linearGradientColor(0, contentBox.getTopY() + 20, 0, contentBox.getTopY() +
    contentBox.getHeight() - 50, 0x60ff0000, 0x60ffffff));

// Adjust the plot area size, such that the bounding box (inclusive of axes) is 15 pixels from the
// left depressed edge, 25 pixels below the top depressed edge, 25 pixels from the right depressed
// edge, and 15 pixels above the bottom depressed edge.
c.packPlotArea(contentBox.getLeftX() + 15, contentBox.getTopY() + 25, contentBox.getLeftX() +
    contentBox.getWidth() - 25, contentBox.getTopY() + contentBox.getHeight() - 15);

// Add a custom CDML text with the bottom right corner is anchored to the bootom right corner of the
// plot area, with 5 pixels margin.
c.addText(plotArea.getLeftX() + plotArea.getWidth() - 5, plotArea.getTopY() + plotArea.getHeight() -
    5,
    "<*block,valign=absmiddle*><*img=small_molecule.png*> <*block*><*font=Times New Roman Bold " +
    "Italic,size=10,color=804040*>Molecular\nEngineering<*/*>").setAlignment(Chart.BottomRight);

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

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

public class enhancedarea implements DemoModule
{
    //Name of demo program
    public String toString() { return "Enhanced Area 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 data for the area chart
        double[] data = {30, 28, 40, 55, 75, 68, 54, 60, 50, 62, 75, 65, 75, 89, 60, 55, 53, 35, 50,
            66, 56, 48, 52, 65, 62};

        // The labels for the area chart
        String[] labels = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13",
            "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24"};

        // Create a XYChart object of size 600 x 360 pixels, with a brushed silver background, 1
        // pixel 3D border effect, rounded corners and soft drop shadow.
        XYChart c = new XYChart(600, 360, Chart.brushedSilverColor(), Chart.Transparent, 1);
        c.setRoundedFrame();
        c.setDropShadow();

        // Add a title box to the chart using 18pt Times Bold Italic font.
        TextBox title = c.addTitle(
            "<*block,valign=absmiddle*><*img=star.png*><*img=star.png*> Performance Enhancer " +
            "<*img=star.png*><*img=star.png*><*/*>", "Times New Roman Bold Italic", 18);

        //
        // Use a text box with a depressed 3D border to create the inner depressed region
        //

        // The width of the frame border
        int frameWidth = 5;

        // Set the depressed region position
        TextBox contentBox = c.addText(frameWidth, title.getHeight(), "");
        contentBox.setSize(c.getDrawArea().getWidth() - 1 - frameWidth * 2, c.getDrawArea(
            ).getHeight() - title.getHeight() - frameWidth - 1);

        // Use -1 as the rasied effect to create a depressed region
        contentBox.setBackground(Chart.Transparent, Chart.Transparent, -1);

        // Set rounded corners, and put the text box at the back of the chart
        contentBox.setRoundedCorners(10);
        contentBox.setZOrder(Chart.ChartBackZ);

        // Tentatively set the plotarea to 50 pixels from the left depressed edge, and 25 pixels
        // under the top depressed edge. Set the width to 75 pixels less than the depressed region
        // width, and the height to 75 pixels less than the depressed region height. Use white
        // (ffffff) background, transparent border, and grey (cccccc) horizontal and vertical grid
        // lines.
        PlotArea plotArea = c.setPlotArea(50 + contentBox.getLeftX(), contentBox.getTopY() + 25,
            contentBox.getWidth() - 75, contentBox.getHeight() - 75, 0xffffff, -1, -1, 0xcccccc, -1)
            ;

        // Add a title to the y axis
        c.yAxis().setTitle("Energy Concentration (KJ per liter)");

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

        // Display 1 out of 3 labels on the x-axis.
        c.xAxis().setLabelStep(3);

        // Add a title to the x axis using CDML
        c.xAxis().setTitle("<*block,valign=absmiddle*><*img=clock.png*>  Elapsed Time (hour)<*/*>");

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

        // Add an area layer to the chart using a gradient color that changes vertically from
        // semi-transparent red (60ff0000) to semi-transparent white (60ffffff)
        c.addAreaLayer(data, c.linearGradientColor(0, contentBox.getTopY() + 20, 0,
            contentBox.getTopY() + contentBox.getHeight() - 50, 0x60ff0000, 0x60ffffff));

        // Adjust the plot area size, such that the bounding box (inclusive of axes) is 15 pixels
        // from the left depressed edge, 25 pixels below the top depressed edge, 25 pixels from the
        // right depressed edge, and 15 pixels above the bottom depressed edge.
        c.packPlotArea(contentBox.getLeftX() + 15, contentBox.getTopY() + 25, contentBox.getLeftX()
             + contentBox.getWidth() - 25, contentBox.getTopY() + contentBox.getHeight() - 15);

        // Add a custom CDML text with the bottom right corner is anchored to the bootom right
        // corner of the plot area, with 5 pixels margin.
        c.addText(plotArea.getLeftX() + plotArea.getWidth() - 5, plotArea.getTopY() +
            plotArea.getHeight() - 5,
            "<*block,valign=absmiddle*><*img=small_molecule.png*> <*block*><*font=Times New " +
            "Roman Bold Italic,size=10,color=804040*>Molecular\nEngineering<*/*>").setAlignment(
            Chart.BottomRight);

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

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

    //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 enhancedarea();

        //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);
    }
}