boxandwhiskertooltipgenerator.java

jfreechart安装程序和使用说明

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation;
 * either version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * ------------------------------------
 * BoxAndWhiskerToolTipGenerator.java
 * ------------------------------------
 * (C) Copyright 2004, by David Browning and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: BoxAndWhiskerToolTipGenerator.java,v 1.1 2004/08/31 14:36:24 mungady Exp $
 *
 * Changes
 * -------
 * 02-Jun-2004 : Version 1 (DG);
 *
 */

package org.jfree.chart.labels;

import java.io.Serializable;
import java.text.MessageFormat;
import java.text.NumberFormat;

import org.jfree.data.category.CategoryDataset;
import org.jfree.data.statistics.BoxAndWhiskerCategoryDataset;

/**
 * An item label generator for plots that use data from a 
 * {@link BoxAndWhiskerCategoryDataset}.
 * <P>
 * The tooltip text and item label text are composed using a {@link java.text.MessageFormat} 
 * object, that can aggregate some or all of the following string values into a message.
 * <table>
 * <tr><td>0</td><td>Series Name</td></tr>
 * <tr><td>1</td><td>X (value or date)</td></tr>
 * <tr><td>2</td><td>Mean</td></tr>
 * <tr><td>3</td><td>Median</td></tr>
 * <tr><td>4</td><td>Minimum</td></tr>
 * <tr><td>5</td><td>Maximum</td></tr>
 * <tr><td>6</td><td>Quartile 1</td></tr>
 * <tr><td>7</td><td>Quartile 3</td></tr>
 * </table>
 */
public class BoxAndWhiskerToolTipGenerator extends StandardCategoryToolTipGenerator
                                           implements CategoryToolTipGenerator,
                                                      Cloneable,
                                                      Serializable {

    /** The default tooltip format string. */
    public static final String DEFAULT_TOOL_TIP_FORMAT 
        = "X: {1} Mean: {2} Median: {3} Min: {4} Max: {5} Q1: {6} Q3: {7} ";
    
    /**
     * Creates a default tool tip generator.
     */
    public BoxAndWhiskerToolTipGenerator() {
        super(DEFAULT_TOOL_TIP_FORMAT, NumberFormat.getInstance());
    }
    
    /**
     * Creates a tool tip formatter.
     * 
     * @param format  the tool tip format string.
     * @param formatter  the formatter.
     */
    public BoxAndWhiskerToolTipGenerator(String format, NumberFormat formatter) {
        super(format, formatter);   
    }
    
    /**
     * Creates the array of items that can be passed to the {@link MessageFormat} class
     * for creating labels.
     *
     * @param dataset  the dataset (<code>null</code> not permitted).
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return the items (never <code>null</code>).
     */
    protected Object[] createItemArray(CategoryDataset dataset, int series, int item) {
        Object[] result = new Object[8];
        result[0] = dataset.getRowKey(series);
        Number y = dataset.getValue(series, item);
        NumberFormat formatter = getNumberFormat();
        result[1] = formatter.format(y);
        if (dataset instanceof BoxAndWhiskerCategoryDataset) {
            BoxAndWhiskerCategoryDataset d = (BoxAndWhiskerCategoryDataset) dataset;
            result[2] = formatter.format(d.getMeanValue(series, item));
            result[3] = formatter.format(d.getMedianValue(series, item));
            result[4] = formatter.format(d.getMinRegularValue(series, item));
            result[5] = formatter.format(d.getMaxRegularValue(series, item));
            result[6] = formatter.format(d.getQ1Value(series, item));
            result[7] = formatter.format(d.getQ3Value(series, item));
        }
        return result;
    }

    /**
     * Tests if this object is equal to another.
     *
     * @param o  the other object.
     *
     * @return A boolean.
     */
    public boolean equals(Object o) {

        if (o == null) {
            return false;
        }
        if (o == this) {
            return true;
        }

        if (o instanceof BoxAndWhiskerToolTipGenerator) {
            return super.equals(o);
        }

        return false;

    }
    
}