    001/* ===========================================================
    002 * JFreeChart : a free chart library for the Java(tm) platform
    003 * ===========================================================
    004 *
    005 * (C) Copyright 2000-2011, 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 * [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 * PaintScale.java
    029 * ---------------
    030 * (C) Copyright 2006-2008, by Object Refinery Limited.
    031 *
    032 * Original Author:  David Gilbert (for Object Refinery Limited);
    033 * Contributor(s):   -;
    034 *
    035 * Changes
    036 * -------
    037 * 05-Jul-2006 : Version 1 (DG);
    038 * 31-Jan-2007 : Added getLowerBound() and getUpperBound() methods (DG);
    039 *
    040 */
    041
    042package org.jfree.chart.renderer;
    043
    044import java.awt.Paint;
    045
    046import org.jfree.chart.renderer.xy.XYBlockRenderer;
    047
    048/**
    049 * A source for <code>Paint</code> instances, used by the
    050 * {@link XYBlockRenderer}.
    051 * <br><br>
    052 * NOTE: Classes that implement this interface should also implement
    053 * <code>PublicCloneable</code> and <code>Serializable</code>, so
    054 * that any renderer (or other object instance) that references an instance of
    055 * this interface can still be cloned or serialized.
    056 *
    057 * @since 1.0.4
    058 */
    059public interface PaintScale {
    060
    061    /**
    062     * Returns the lower bound for the scale.
    063     *
    064     * @return The lower bound.
    065     *
    066     * @see #getUpperBound()
    067     */
    068    public double getLowerBound();
    069
    070    /**
    071     * Returns the upper bound for the scale.
    072     *
    073     * @return The upper bound.
    074     *
    075     * @see #getLowerBound()
    076     */
    077    public double getUpperBound();
    078
    079    /**
    080     * Returns a <code>Paint</code> instance for the specified value.
    081     *
    082     * @param value  the value.
    083     *
    084     * @return A <code>Paint</code> instance (never <code>null</code>).
    085     */
    086    public Paint getPaint(double value);
    087
    088}