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jfreechart example source code file (IntervalCategoryToolTipGenerator.java)

This example jfreechart source code file (IntervalCategoryToolTipGenerator.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, default_tool_tip_format_string, intervalcategorydataset, intervalcategorydataset, intervalcategorytooltipgenerator, intervalcategorytooltipgenerator, number, number, numberformat, object, object, standardcategorytooltipgenerator, string, text

The jfreechart IntervalCategoryToolTipGenerator.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.]
 *
 * -------------------------------------
 * IntervalCategoryToolTipGenerator.java
 * -------------------------------------
 * (C) Copyright 2004-2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 11-May-2004 : Version 1, split from IntervalCategoryItemLabelGenerator (DG);
 * 08-Oct-2008 : Override equals() method (DG);
 *
 */

package org.jfree.chart.labels;

import java.text.DateFormat;
import java.text.NumberFormat;

import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.IntervalCategoryDataset;

/**
 * A tooltip generator for plots that use data from an
 * {@link IntervalCategoryDataset}.
 */
public class IntervalCategoryToolTipGenerator
        extends StandardCategoryToolTipGenerator {

    /** For serialization. */
    private static final long serialVersionUID = -3853824986520333437L;

    /** The default format string. */
    public static final String DEFAULT_TOOL_TIP_FORMAT_STRING
            = "({0}, {1}) = {3} - {4}";

    /**
     * Creates a new generator with a default number formatter.
     */
    public IntervalCategoryToolTipGenerator() {
        super(DEFAULT_TOOL_TIP_FORMAT_STRING, NumberFormat.getInstance());
    }

    /**
     * Creates a new generator with the specified number formatter.
     *
     * @param labelFormat  the label format string (<code>null not
     *                     permitted).
     * @param formatter  the number formatter (<code>null not permitted).
     */
    public IntervalCategoryToolTipGenerator(String labelFormat,
                                            NumberFormat formatter) {
        super(labelFormat, formatter);
    }

    /**
     * Creates a new generator with the specified date formatter.
     *
     * @param labelFormat  the label format string (<code>null not
     *                     permitted).
     * @param formatter  the date formatter (<code>null not permitted).
     */
    public IntervalCategoryToolTipGenerator(String labelFormat,
                                            DateFormat formatter) {
        super(labelFormat, formatter);
    }

    /**
     * Creates the array of items that can be passed to the
     * <code>MessageFormat class for creating labels.
     *
     * @param dataset  the dataset (<code>null not permitted).
     * @param row  the row index (zero-based).
     * @param column  the column index (zero-based).
     *
     * @return The items (never <code>null).
     */
    protected Object[] createItemArray(CategoryDataset dataset,
                                       int row, int column) {
        Object[] result = new Object[5];
        result[0] = dataset.getRowKey(row).toString();
        result[1] = dataset.getColumnKey(column).toString();
        Number value = dataset.getValue(row, column);
        if (getNumberFormat() != null) {
            result[2] = getNumberFormat().format(value);
        }
        else if (getDateFormat() != null) {
            result[2] = getDateFormat().format(value);
        }

        if (dataset instanceof IntervalCategoryDataset) {
            IntervalCategoryDataset icd = (IntervalCategoryDataset) dataset;
            Number start = icd.getStartValue(row, column);
            Number end = icd.getEndValue(row, column);
            if (getNumberFormat() != null) {
                result[3] = getNumberFormat().format(start);
                result[4] = getNumberFormat().format(end);
            }
            else if (getDateFormat() != null) {
                result[3] = getDateFormat().format(start);
                result[4] = getDateFormat().format(end);
            }
        }
        return result;
    }

    /**
     * Tests this tool tip generator for equality with an arbitrary
     * object.
     *
     * @param obj  the object (<code>null permitted).
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof IntervalCategoryToolTipGenerator)) {
            return false;
        }
        // no fields to test
        return super.equals(obj);
    }

}

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