boxandwhiskerxytooltipgenerator.java

来自「JfreeChart 常用图表例子」· Java 代码 · 共 174 行

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2005, 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.]
 *
 * ------------------------------------
 * BoxAndWhiskerXYToolTipGenerator.java
 * ------------------------------------
 * (C) Copyright 2003-2005, by David Browning and Contributors.
 *
 * Original Author:  David Browning;
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *
 * $Id: BoxAndWhiskerXYToolTipGenerator.java,v 1.4 2005/05/20 08:20:03 mungady Exp $
 *
 * Changes
 * -------
 * 05-Aug-2003 : Version 1, contributed by David Browning (DG);
 * 13-Aug-2003 : Implemented Cloneable (DG);
 * 28-Aug-2003 : Updated for changes in dataset API (DG);
 * 25-Feb-2004 : Renamed XYToolTipGenerator --> XYItemLabelGenerator (DG);
 * 27-Feb-2004 : Renamed BoxAndWhiskerItemLabelGenerator --> 
 *               BoxAndWhiskerXYItemLabelGenerator, and modified to use 
 *               MessageFormat (DG);
 * 15-Jul-2004 : Switched getX() with getXValue() and getY() with 
 *               getYValue() (DG);
 *
 */

package org.jfree.chart.labels;

import java.io.Serializable;
import java.text.DateFormat;
import java.text.MessageFormat;
import java.text.NumberFormat;
import java.util.Date;

import org.jfree.data.statistics.BoxAndWhiskerXYDataset;
import org.jfree.data.xy.XYDataset;

/**
 * An item label generator for plots that use data from a 
 * {@link BoxAndWhiskerXYDataset}.
 * <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>
 * 
 * @author David Browning
 */
public class BoxAndWhiskerXYToolTipGenerator extends StandardXYToolTipGenerator
                                             implements XYToolTipGenerator,
                                                        Cloneable,
                                                        Serializable {

    /** For serialization. */
    private static final long serialVersionUID = -2648775791161459710L;
    
    /** 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 item label generator.
     */
    public BoxAndWhiskerXYToolTipGenerator() {
        super(
            DEFAULT_TOOL_TIP_FORMAT,
            NumberFormat.getInstance(), NumberFormat.getInstance()
        );
    }

    /**
     * Creates a new item label generator.  If the date formatter is not 
     * <code>null</code>, the x-values will be formatted as dates.
     * 
     * @param toolTipFormat  the tool tip format string (<code>null</code> not 
     *                       permitted).
     * @param numberFormat  the number formatter (<code>null</code> not 
     *                      permitted).
     * @param dateFormat  the date formatter (<code>null</code> permitted).
     */
    public BoxAndWhiskerXYToolTipGenerator(String toolTipFormat, 
                                           DateFormat dateFormat, 
                                           NumberFormat numberFormat) {
        
        super(toolTipFormat, dateFormat, numberFormat);
    
    }
    
    /**
     * 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(XYDataset dataset, int series, 
                                       int item) {
        Object[] result = new Object[8];
        result[0] = dataset.getSeriesKey(series).toString();
        Number x = dataset.getX(series, item);
        if (getXDateFormat() != null) {
            result[1] = getXDateFormat().format(new Date(x.longValue()));   
        }
        else {
            result[1] = getXFormat().format(x);
        }
        NumberFormat formatter = getYFormat();
        
        if (dataset instanceof BoxAndWhiskerXYDataset) {
            BoxAndWhiskerXYDataset d = (BoxAndWhiskerXYDataset) 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 obj  the other object.
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof BoxAndWhiskerXYToolTipGenerator)) {
            return false;
        }
        return super.equals(obj);
    }
    
}