001/* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-2022, by David Gilbert and Contributors.
006 *
007 * Project Info:  http://www.jfree.org/jfreechart/index.html
008 *
009 * This library is free software; you can redistribute it and/or modify it
010 * under the terms of the GNU Lesser General Public License as published by
011 * the Free Software Foundation; either version 2.1 of the License, or
012 * (at your option) any later version.
013 *
014 * This library is distributed in the hope that it will be useful, but
015 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
016 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
017 * License for more details.
018 *
019 * You should have received a copy of the GNU Lesser General Public
020 * License along with this library; if not, write to the Free Software
021 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
022 * USA.
023 *
024 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
025 * Other names may be trademarks of their respective owners.]
026 *
027 * --------------------
028 * AxisChangeEvent.java
029 * --------------------
030 * (C) Copyright 2000-2022, by David Gilbert.
031 *
032 * Original Author:  David Gilbert;
033 * Contributor(s):   -;
034 *
035 */
036
037package org.jfree.chart.event;
038
039import org.jfree.chart.axis.Axis;
040
041/**
042 * A change event that encapsulates information about a change to an axis.
043 */
044public class AxisChangeEvent extends ChartChangeEvent {
045
046    /** The axis that generated the change event. */
047    private final Axis axis;
048
049    /**
050     * Creates a new AxisChangeEvent.
051     *
052     * @param axis  the axis that generated the event ({@code null} not 
053     *     permitted).
054     */
055    public AxisChangeEvent(Axis axis) {
056        super(axis); // null is checked in this call
057        this.axis = axis;
058    }
059
060    /**
061     * Returns the axis that generated the event.
062     *
063     * @return The axis that generated the event (never {@code null}).
064     */
065    public Axis getAxis() {
066        return this.axis;
067    }
068
069}