jfreechart example source code file (StandardPieToolTipGenerator.java)

This example jfreechart source code file (StandardPieToolTipGenerator.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - jfreechart tags/keywords

abstractpieitemlabelgenerator, clonenotsupportedexception, default_section_label_format, io, locale, numberformat, numberformat, pietooltipgenerator, publiccloneable, publiccloneable, serializable, standardpietooltipgenerator, standardpietooltipgenerator, string, string, text, util

The jfreechart StandardPieToolTipGenerator.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2008, 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * --------------------------------
 * StandardPieToolTipGenerator.java
 * --------------------------------
 * (C) Copyright 2001-2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   Richard Atkinson;
 *                   Andreas Schroeder;
 *
 * Changes
 * -------
 * 13-Dec-2001 : Version 1 (DG);
 * 16-Jan-2002 : Completed Javadocs (DG);
 * 29-Aug-2002 : Changed to format numbers using default locale (RA);
 * 26-Sep-2002 : Fixed errors reported by Checkstyle (DG);
 * 30-Oct-2002 : Changed PieToolTipGenerator interface (DG);
 * 21-Mar-2003 : Implemented Serializable (DG);
 * 13-Aug-2003 : Implemented Cloneable (DG);
 * 19-Aug-2003 : Renamed StandardPieToolTipGenerator -->
 *               StandardPieItemLabelGenerator (DG);
 * 10-Mar-2004 : Modified to use MessageFormat class (DG);
 * 31-Mar-2004 : Added javadocs for the MessageFormat usage (AS);
 * 15-Apr-2004 : Split PieItemLabelGenerator interface into
 *               PieSectionLabelGenerator and PieToolTipGenerator (DG);
 * 25-Nov-2004 : Moved some code into abstract super class (DG);
 * 29-Jul-2005 : Removed implementation of PieSectionLabelGenerator
 *               interface (DG);
 * 10-Jul-2007 : Added constructors with locale argument (DG);
 *
 */

package org.jfree.chart.labels;

import java.io.Serializable;
import java.text.NumberFormat;
import java.util.Locale;

import org.jfree.data.general.PieDataset;
import org.jfree.util.PublicCloneable;

/**
 * A standard item label generator for plots that use data from a
 * {@link PieDataset}.
 * <p>
 * For the label format, use {0} where the pie section key should be inserted,
 * {1} for the absolute section value and {2} for the percent amount of the pie
 * section, e.g. <code>"{0} = {1} ({2})" will display as
 * <code>apple = 120 (5%).
 */
public class StandardPieToolTipGenerator extends AbstractPieItemLabelGenerator
        implements PieToolTipGenerator, Cloneable, PublicCloneable,
            Serializable {

    /** For serialization. */
    private static final long serialVersionUID = 2995304200445733779L;

    /** The default tooltip format. */
    public static final String DEFAULT_TOOLTIP_FORMAT = "{0}: ({1}, {2})";

    /**
     * The default section label format.
     *
     * @deprecated As of 1.0.7, use {@link #DEFAULT_TOOLTIP_FORMAT} instead.
     */
    public static final String DEFAULT_SECTION_LABEL_FORMAT = "{0} = {1}";

    /**
     * Creates an item label generator using default number formatters.
     */
    public StandardPieToolTipGenerator() {
        this(DEFAULT_TOOLTIP_FORMAT);
    }

    /**
     * Creates a pie tool tip generator for the specified locale, using the
     * default format string.
     *
     * @param locale  the locale (<code>null not permitted).
     *
     * @since 1.0.7
     */
    public StandardPieToolTipGenerator(Locale locale) {
        this(DEFAULT_TOOLTIP_FORMAT, locale);
    }

    /**
     * Creates a pie tool tip generator for the default locale.
     *
     * @param labelFormat  the label format (<code>null not permitted).
     */
    public StandardPieToolTipGenerator(String labelFormat) {
        this(labelFormat, Locale.getDefault());
    }

    /**
     * Creates a pie tool tip generator for the specified locale.
     *
     * @param labelFormat  the label format (<code>null not permitted).
     * @param locale  the locale (<code>null not permitted).
     *
     * @since 1.0.7
     */
    public StandardPieToolTipGenerator(String labelFormat, Locale locale) {
        this(labelFormat, NumberFormat.getNumberInstance(locale),
                NumberFormat.getPercentInstance(locale));
    }

    /**
     * Creates an item label generator using the specified number formatters.
     *
     * @param labelFormat  the label format string (<code>null not
     *                     permitted).
     * @param numberFormat  the format object for the values (<code>null
     *                      not permitted).
     * @param percentFormat  the format object for the percentages
     *                       (<code>null not permitted).
     */
    public StandardPieToolTipGenerator(String labelFormat,
            NumberFormat numberFormat, NumberFormat percentFormat) {
        super(labelFormat, numberFormat, percentFormat);
    }

    /**
     * Generates a tool tip text item for one section in a pie chart.
     *
     * @param dataset  the dataset (<code>null not permitted).
     * @param key  the section key (<code>null not permitted).
     *
     * @return The tool tip text (possibly <code>null).
     */
    public String generateToolTip(PieDataset dataset, Comparable key) {
        return generateSectionLabel(dataset, key);
    }

    /**
     * Returns an independent copy of the generator.
     *
     * @return A clone.
     *
     * @throws CloneNotSupportedException  should not happen.
     */
    public Object clone() throws CloneNotSupportedException {
        return super.clone();
    }

}