001    /* ===========================================================
002     * JFreeChart : a free chart library for the Java(tm) platform
003     * ===========================================================
004     *
005     * (C) Copyright 2000-2008, by Object Refinery Limited 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     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
025     * in the United States and other countries.]
026     *
027     * ------------------
028     * ValueAxisPlot.java
029     * ------------------
030     *
031     * (C) Copyright 2003-2008, by Object Refinery Limited and Contributors.
032     *
033     * Original Author:  David Gilbert (for Object Refinery Limited);
034     * Contributor(s):   -;
035     *
036     * Changes
037     * -------
038     * 07-May-2003 : Version 1 (DG);
039     * 11-Nov-2004 : Changed Horizontal --> Domain and Vertical --> Range (DG);
040     * 12-Nov-2004 : Moved zooming methods to new Zoomable interface (DG);
041     *
042     */
043    
044    package org.jfree.chart.plot;
045    
046    import org.jfree.chart.axis.ValueAxis;
047    import org.jfree.data.Range;
048    
049    /**
050     * An interface that is implemented by plots that use a {@link ValueAxis},
051     * providing a standard method to find the current data range.
052     */
053    public interface ValueAxisPlot {
054    
055        /**
056         * Returns the data range that should apply for the specified axis.
057         *
058         * @param axis  the axis.
059         *
060         * @return The data range.
061         */
062        public Range getDataRange(ValueAxis axis);
063    
064    }