Normalize Example Normalizes data to compare the relative percent changes of the various sets of data. This example demonstrates the functional use of setNormalize(). back to index The source code:

/**
 * @version $Id: NormalizeExample.java,v 1.2 2000/11/13 18:47:17 Administrator Exp $
 */

import com.smartmoney.webgraph.*;

import java.awt.*;
import java.awt.event.*;
import java.applet.*;

/**
 * NormalizeExample
 *
 * Demonstrates hiding/showing of graph elements; demonstrates
 * normalizingraph.  See StockExample.java for a more detailed discussion
 * of normalizingraph.
 *
 * @author <a href="mailto:jdf@pobox.com">Jonathan Feinberg</a>
 */
public class NormalizeExample
        extends Applet
        implements ItemListener
{
    static final private int size = 60;
    static final private int seriesCount = 5;
    static final private Color[] colors = new Color[]{
        Color.red, Color.blue, Color.green, Color.gray, Color.orange
    };

    Checkbox cbNormalize;
    Checkbox[] cbSeries;
    GraphElement[] elements;
    Graph graph;

    public void init()
    {
        graph = new BusinessDateGraph();
        Panel cbp = new Panel();
        cbp.setBackground(Color.white);

        cbNormalize = new Checkbox("Normalize");
        addCheckboxTo(cbNormalize, cbp);
        graph.setNormalize(true);

        ParameterParser parser = new ParameterParser(this);

        elements = new GraphElement[seriesCount];
        cbSeries = new Checkbox[seriesCount];
        for (int i = 0; i < elements.length; i++)
        {
            FakeStock stock = new FakeStock(size);
            elements[i] = new LineElement
                    (new GraphModel(new SimpleDataSource(stock.dates, stock.close)));
            graph.addGraphElement(elements[i]);
            String param = "line" + (i + 1) + "color";
            elements[i].setColor(parser.getColor(param, colors[i % colors.length]));
            String label = (new Integer(i + 1)).toString();
            elements[i].setLabel("Series " + label + ":");
            cbSeries[i] = new Checkbox(label);
            addCheckboxTo(cbSeries[i], cbp);
        }

        setLayout(new BorderLayout());
        add(graph, BorderLayout.CENTER);
        add(cbp, BorderLayout.NORTH);

        GraphParameterParser.parse(graph, parser);
    }

    private void addCheckboxTo(Checkbox cb, Panel p)
    {
        cb.setState(true);
        cb.addItemListener(this);
        p.add(cb);
    }

    public void itemStateChanged(ItemEvent e)
    {
        for (int i = 0; i < seriesCount; i++)
            elements[i].setVisible(cbSeries[i].getState());
        graph.setNormalize(cbNormalize.getState());
    }
}

Copyright (c) 2006 SmartMoney.com