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jfreechart example source code file (StandardContourToolTipGenerator.java)

This example jfreechart source code file (StandardContourToolTipGenerator.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

date, decimalformat, io, serializable, simpledateformat, standardcontourtooltipgenerator, standardcontourtooltipgenerator, string, string, stringbuffer, text, util, x, x, y, y, z

The jfreechart StandardContourToolTipGenerator.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.]
 *
 * ------------------------------------
 * StandardContourToolTipGenerator.java
 * ------------------------------------
 * (C) Copyright 2002-2008, by David M. O'Donnell and Contributors.
 *
 * Original Author:  David M. O'Donnell;
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *
 * Changes
 * -------
 * 23-Jan-2003 : Added standard header (DG);
 * 21-Mar-2003 : Implemented Serializable (DG);
 * 15-Jul-2004 : Switched the getZ() and getZValue() methods (DG);
 * 19-Jan-2005 : Now accesses primitives only from dataset (DG);
 *
 */

package org.jfree.chart.labels;

import java.io.Serializable;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYBlockRenderer;
import org.jfree.data.contour.ContourDataset;

/**
 * A standard tooltip generator for plots that use data from an
 * {@link ContourDataset}.
 *
 * @deprecated This class is no longer supported (as of version 1.0.4).  If
 *     you are creating contour plots, please try to use {@link XYPlot} and
 *     {@link XYBlockRenderer}.
 */
public class StandardContourToolTipGenerator implements ContourToolTipGenerator,
                                                        Serializable {

    /** For serialization. */
    private static final long serialVersionUID = -1881659351247502711L;

    /** The number formatter. */
    private DecimalFormat valueForm = new DecimalFormat("##.###");

    /**
     * Generates a tooltip text item for a particular item within a series.
     *
     * @param data  the dataset.
     * @param item  the item index (zero-based).
     *
     * @return The tooltip text.
     */
    public String generateToolTip(ContourDataset data, int item) {

        double x = data.getXValue(0, item);
        double y = data.getYValue(0, item);
        double z = data.getZValue(0, item);
        String xString = null;

        if (data.isDateAxis(0)) {
            SimpleDateFormat formatter
                = new java.text.SimpleDateFormat("MM/dd/yyyy hh:mm:ss");
            StringBuffer strbuf = new StringBuffer();
            strbuf = formatter.format(
                new Date((long) x), strbuf, new java.text.FieldPosition(0)
            );
            xString = strbuf.toString();
        }
        else {
            xString = this.valueForm.format(x);
        }
        if (!Double.isNaN(z)) {
            return "X: " + xString
                   + ", Y: " + this.valueForm.format(y)
                   + ", Z: " + this.valueForm.format(z);
        }
        else {
            return "X: " + xString
                 + ", Y: " + this.valueForm.format(y)
                 + ", Z: no data";
        }

    }

    /**
     * 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 StandardContourToolTipGenerator)) {
            return false;
        }
        StandardContourToolTipGenerator that
            = (StandardContourToolTipGenerator) obj;
        if (this.valueForm != null) {
            return this.valueForm.equals(that.valueForm);
        }
        return false;

    }

}

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