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jfreechart example source code file (StandardXYZToolTipGenerator.java)

This example jfreechart source code file (StandardXYZToolTipGenerator.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

dateformat, dateformat, default_tool_tip_format, illegalargumentexception, io, null, number, numberformat, numberformat, object, object, serializable, standardxyztooltipgenerator, standardxyztooltipgenerator, string, text

The jfreechart StandardXYZToolTipGenerator.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.]
 *
 * --------------------------------
 * StandardXYZToolTipGenerator.java
 * --------------------------------
 * (C) Copyright 2004-2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 11-May-2003 : Version 1, split from StandardXYZItemLabelGenerator (DG);
 * 15-Jul-2004 : Switched getZ() and getZValue() methods (DG);
 *
 */

package org.jfree.chart.labels;

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

import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYZDataset;
import org.jfree.util.ObjectUtilities;

/**
 * A standard item label generator for use with {@link XYZDataset} data.  Each
 * value can be formatted as a number or as a date.
 */
public class StandardXYZToolTipGenerator extends StandardXYToolTipGenerator
        implements XYZToolTipGenerator, Serializable {

    /** For serialization. */
    private static final long serialVersionUID = -2961577421889473503L;

    /** The default tooltip format. */
    public static final String DEFAULT_TOOL_TIP_FORMAT = "{0}: ({1}, {2}, {3})";

    /**
     * A number formatter for the z value - if this is null, then zDateFormat
     * must be non-null.
     */
    private NumberFormat zFormat;

    /**
     * A date formatter for the z-value - if this is null, then zFormat must be
     * non-null.
     */
    private DateFormat zDateFormat;

    /**
     * Creates a new tool tip generator using default number formatters for the
     * x, y and z-values.
     */
    public StandardXYZToolTipGenerator() {
        this(
            DEFAULT_TOOL_TIP_FORMAT,
            NumberFormat.getNumberInstance(),
            NumberFormat.getNumberInstance(),
            NumberFormat.getNumberInstance()
        );
    }

    /**
     * Constructs a new tool tip generator using the specified number
     * formatters.
     *
     * @param formatString  the format string.
     * @param xFormat  the format object for the x values (<code>null
     *                 not permitted).
     * @param yFormat  the format object for the y values (<code>null
     *                 not permitted).
     * @param zFormat  the format object for the z values (<code>null
     *                 not permitted).
     */
    public StandardXYZToolTipGenerator(String formatString,
                                       NumberFormat xFormat,
                                       NumberFormat yFormat,
                                       NumberFormat zFormat) {
        super(formatString, xFormat, yFormat);
        if (zFormat == null) {
            throw new IllegalArgumentException("Null 'zFormat' argument.");
        }
        this.zFormat = zFormat;
    }

    /**
     * Constructs a new tool tip generator using the specified date formatters.
     *
     * @param formatString  the format string.
     * @param xFormat  the format object for the x values (<code>null
     *                 not permitted).
     * @param yFormat  the format object for the y values (<code>null
     *                 not permitted).
     * @param zFormat  the format object for the z values (<code>null
     *                 not permitted).
     */
    public StandardXYZToolTipGenerator(String formatString,
                                       DateFormat xFormat,
                                       DateFormat yFormat,
                                       DateFormat zFormat) {
        super(formatString, xFormat, yFormat);
        if (zFormat == null) {
            throw new IllegalArgumentException("Null 'zFormat' argument.");
        }
        this.zDateFormat = zFormat;
    }

    // TODO:  add constructors for combinations of number and date formatters.

    /**
     * Returns the number formatter for the z-values.
     *
     * @return The number formatter (possibly <code>null).
     */
    public NumberFormat getZFormat() {
        return this.zFormat;
    }

    /**
     * Returns the date formatter for the z-values.
     *
     * @return The date formatter (possibly <code>null).
     */
    public DateFormat getZDateFormat() {
        return this.zDateFormat;
    }

    /**
     * Generates a tool tip text item for a particular item within a series.
     *
     * @param dataset  the dataset (<code>null not permitted).
     * @param series  the series index (zero-based).
     * @param item  the item index (zero-based).
     *
     * @return The tooltip text (possibly <code>null).
     */
    public String generateToolTip(XYZDataset dataset, int series, int item) {
        return generateLabelString(dataset, series, item);
    }

    /**
     * Generates a label string for an item in the dataset.
     *
     * @param dataset  the dataset (<code>null not permitted).
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The label (possibly <code>null).
     */
    public String generateLabelString(XYDataset dataset, int series, int item) {
        String result = null;
        Object[] items = createItemArray((XYZDataset) dataset, series, item);
        result = MessageFormat.format(getFormatString(), items);
        return result;
    }

    /**
     * Creates the array of items that can be passed to the
     * {@link MessageFormat} class for creating labels.
     *
     * @param dataset  the dataset (<code>null not permitted).
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The items (never <code>null).
     */
    protected Object[] createItemArray(XYZDataset dataset,
                                       int series, int item) {

        Object[] result = new Object[4];
        result[0] = dataset.getSeriesKey(series).toString();

        Number x = dataset.getX(series, item);
        DateFormat xf = getXDateFormat();
        if (xf != null) {
            result[1] = xf.format(x);
        }
        else {
            result[1] = getXFormat().format(x);
        }

        Number y = dataset.getY(series, item);
        DateFormat yf = getYDateFormat();
        if (yf != null) {
            result[2] = yf.format(y);
        }
        else {
            result[2] = getYFormat().format(y);
        }

        Number z = dataset.getZ(series, item);
        if (this.zDateFormat != null) {
            result[3] = this.zDateFormat.format(z);
        }
        else {
            result[3] = this.zFormat.format(z);
        }

        return result;

    }

    /**
     * Tests this object for equality with an arbitrary object.
     *
     * @param obj  the other object (<code>null permitted).
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof StandardXYZToolTipGenerator)) {
            return false;
        }
        if (!super.equals(obj)) {
            return false;
        }
        StandardXYZToolTipGenerator that = (StandardXYZToolTipGenerator) obj;
        if (!ObjectUtilities.equal(this.zFormat, that.zFormat)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.zDateFormat, that.zDateFormat)) {
            return false;
        }
        return true;

    }

}

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