001 /* =========================================================== 002 * JFreeChart : a free chart library for the Java(tm) platform 003 * =========================================================== 004 * 005 * (C) Copyright 2000-2007, 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 * PaintScale.java 029 * --------------- 030 * (C) Copyright 2006, 2007, by Object Refinery Limited. 031 * 032 * Original Author: David Gilbert (for Object Refinery Limited); 033 * Contributor(s): -; 034 * 035 * $Id: PaintScale.java,v 1.1.2.2 2007/01/31 14:31:24 mungady Exp $ 036 * 037 * Changes 038 * ------- 039 * 05-Jul-2006 : Version 1 (DG); 040 * 31-Jan-2007 : Added getLowerBound() and getUpperBound() methods (DG); 041 * 042 */ 043 044 package org.jfree.chart.renderer; 045 046 import java.awt.Paint; 047 048 import org.jfree.chart.renderer.xy.XYBlockRenderer; 049 050 /** 051 * A source for <code>Paint</code> instances, used by the 052 * {@link XYBlockRenderer}. 053 * <br><br> 054 * NOTE: Classes that implement this interface should also implement 055 * <code>PublicCloneable</code> and <code>Serializable</code>, so 056 * that any renderer (or other object instance) that references an instance of 057 * this interface can still be cloned or serialized. 058 * 059 * @since 1.0.4 060 */ 061 public interface PaintScale { 062 063 /** 064 * Returns the lower bound for the scale. 065 * 066 * @return The lower bound. 067 * 068 * @see #getUpperBound() 069 */ 070 public double getLowerBound(); 071 072 /** 073 * Returns the upper bound for the scale. 074 * 075 * @return The upper bound. 076 * 077 * @see #getLowerBound() 078 */ 079 public double getUpperBound(); 080 081 /** 082 * Returns a <code>Paint</code> instance for the specified value. 083 * 084 * @param value the value. 085 * 086 * @return A <code>Paint</code> instance (never <code>null</code>). 087 */ 088 public Paint getPaint(double value); 089 090 }