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1: /* =========================================================== 2: * JFreeChart : a free chart library for the Java(tm) platform 3: * =========================================================== 4: * 5: * (C) Copyright 2000-2007, by Object Refinery Limited and Contributors. 6: * 7: * Project Info: http://www.jfree.org/jfreechart/index.html 8: * 9: * This library is free software; you can redistribute it and/or modify it 10: * under the terms of the GNU Lesser General Public License as published by 11: * the Free Software Foundation; either version 2.1 of the License, or 12: * (at your option) any later version. 13: * 14: * This library is distributed in the hope that it will be useful, but 15: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 16: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 17: * License for more details. 18: * 19: * You should have received a copy of the GNU Lesser General Public 20: * License along with this library; if not, write to the Free Software 21: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 22: * USA. 23: * 24: * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 25: * in the United States and other countries.] 26: * 27: * --------------- 28: * PaintScale.java 29: * --------------- 30: * (C) Copyright 2006, 2007, by Object Refinery Limited. 31: * 32: * Original Author: David Gilbert (for Object Refinery Limited); 33: * Contributor(s): -; 34: * 35: * Changes 36: * ------- 37: * 05-Jul-2006 : Version 1 (DG); 38: * 31-Jan-2007 : Added getLowerBound() and getUpperBound() methods (DG); 39: * 40: */ 41: 42: package org.jfree.chart.renderer; 43: 44: import java.awt.Paint; 45: 46: import org.jfree.chart.renderer.xy.XYBlockRenderer; 47: 48: /** 49: * A source for <code>Paint</code> instances, used by the 50: * {@link XYBlockRenderer}. 51: * <br><br> 52: * NOTE: Classes that implement this interface should also implement 53: * <code>PublicCloneable</code> and <code>Serializable</code>, so 54: * that any renderer (or other object instance) that references an instance of 55: * this interface can still be cloned or serialized. 56: * 57: * @since 1.0.4 58: */ 59: public interface PaintScale { 60: 61: /** 62: * Returns the lower bound for the scale. 63: * 64: * @return The lower bound. 65: * 66: * @see #getUpperBound() 67: */ 68: public double getLowerBound(); 69: 70: /** 71: * Returns the upper bound for the scale. 72: * 73: * @return The upper bound. 74: * 75: * @see #getLowerBound() 76: */ 77: public double getUpperBound(); 78: 79: /** 80: * Returns a <code>Paint</code> instance for the specified value. 81: * 82: * @param value the value. 83: * 84: * @return A <code>Paint</code> instance (never <code>null</code>). 85: */ 86: public Paint getPaint(double value); 87: 88: }