home | career | drupal | java | mac | mysql | perl | scala | uml | unix  

jfreechart example source code file (StandardCrosshairLabelGenerator.java)

This example jfreechart source code file (StandardCrosshairLabelGenerator.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

crosshairlabelgenerator, illegalargumentexception, io, null, numberformat, numberformat, object, object, serializable, standardcrosshairlabelgenerator, standardcrosshairlabelgenerator, string, string, text

The jfreechart StandardCrosshairLabelGenerator.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2009, 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.]
 *
 * -----------------------------------
 * DefaultCrosshairLabelGenerator.java
 * -----------------------------------
 * (C) Copyright 2009, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes:
 * --------
 * 13-Feb-2009 : Version 1 (DG);
 *
 */

package org.jfree.chart.labels;

import java.io.Serializable;
import java.text.MessageFormat;
import java.text.NumberFormat;
import org.jfree.chart.plot.Crosshair;

/**
 * A default label generator.
 *
 * @since 1.0.13
 */
public class StandardCrosshairLabelGenerator implements CrosshairLabelGenerator,
        Serializable {

    /** The label format string. */
    private String labelTemplate;

    /** A number formatter for the value. */
    private NumberFormat numberFormat;

    /**
     * Creates a new instance with default attributes.
     */
    public StandardCrosshairLabelGenerator() {
        this("{0}", NumberFormat.getNumberInstance());
    }

    /**
     * Creates a new instance with the specified attributes.
     *
     * @param labelTemplate  the label template (<code>null not
     *     permitted).
     * @param numberFormat  the number formatter (<code>null not
     *     permitted).
     */
    public StandardCrosshairLabelGenerator(String labelTemplate,
            NumberFormat numberFormat) {
        super();
        if (labelTemplate == null) {
            throw new IllegalArgumentException(
                    "Null 'labelTemplate' argument.");
        }
        if (numberFormat == null) {
            throw new IllegalArgumentException(
                    "Null 'numberFormat' argument.");
        }
        this.labelTemplate = labelTemplate;
        this.numberFormat = numberFormat;
    }

    /**
     * Returns the label template string.
     *
     * @return The label template string (never <code>null).
     */
    public String getLabelTemplate() {
        return this.labelTemplate;
    }

    /**
     * Returns the number formatter.
     *
     * @return The formatter (never <code>null).
     */
    public NumberFormat getNumberFormat() {
        return this.numberFormat;
    }

    /**
     * Returns a string that can be used as the label for a crosshair.
     *
     * @param crosshair  the crosshair (<code>null not permitted).
     *
     * @return The label (possibly <code>null).
     */
    public String generateLabel(Crosshair crosshair) {
        Object[] v = new Object[] { this.numberFormat.format(
                crosshair.getValue()) };
        String result = MessageFormat.format(this.labelTemplate, v);
        return result;
    }

    /**
     * Tests this 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 StandardCrosshairLabelGenerator)) {
            return false;
        }
        StandardCrosshairLabelGenerator that
                = (StandardCrosshairLabelGenerator) obj;
        if (!this.labelTemplate.equals(that.labelTemplate)) {
            return false;
        }
        if (!this.numberFormat.equals(that.numberFormat)) {
            return false;
        }
        return true;
    }

    /**
     * Returns a hash code for this instance.
     *
     * @return A hash code for this instance.
     */
    public int hashCode() {
        return this.labelTemplate.hashCode();
    }

}

Other jfreechart examples (source code examples)

Here is a short list of links related to this jfreechart StandardCrosshairLabelGenerator.java source code file:



my book on functional programming

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.