001 /* ======================================================================== 002 * JCommon : a free general purpose class library for the Java(tm) platform 003 * ======================================================================== 004 * 005 * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors. 006 * 007 * Project Info: http://www.jfree.org/jcommon/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 * StandardGradientPaintTransformer.java 029 * ------------------------------------- 030 * (C) Copyright 2003-2005, by Object Refinery Limited. 031 * 032 * Original Author: David Gilbert (for Object Refinery Limited); 033 * Contributor(s): -; 034 * 035 * $Id: StandardGradientPaintTransformer.java,v 1.8 2005/10/18 13:18:34 mungady Exp $ 036 * 037 * Changes 038 * ------- 039 * 28-Oct-2003 : Version 1 (DG); 040 * 19-Mar-2004 : Added equals() method (DG); 041 * 042 */ 043 044 package org.jfree.ui; 045 046 import java.awt.GradientPaint; 047 import java.awt.Shape; 048 import java.awt.geom.Rectangle2D; 049 import java.io.Serializable; 050 051 import org.jfree.util.PublicCloneable; 052 053 /** 054 * Transforms a <code>GradientPaint</code> to range over the width of a target 055 * shape. 056 * @author David Gilbert 057 */ 058 public class StandardGradientPaintTransformer 059 implements GradientPaintTransformer, Cloneable, PublicCloneable, 060 Serializable { 061 062 /** For serialization. */ 063 private static final long serialVersionUID = -8155025776964678320L; 064 065 /** The transform type. */ 066 private GradientPaintTransformType type; 067 068 /** 069 * Creates a new transformer. 070 */ 071 public StandardGradientPaintTransformer() { 072 this(GradientPaintTransformType.VERTICAL); 073 } 074 075 /** 076 * Creates a new transformer. 077 * 078 * @param type the transform type. 079 */ 080 public StandardGradientPaintTransformer( 081 final GradientPaintTransformType type) { 082 this.type = type; 083 } 084 085 /** 086 * Transforms a <code>GradientPaint</code> instance. 087 * 088 * @param paint the original paint. 089 * @param target the target shape. 090 * 091 * @return The transformed paint. 092 */ 093 public GradientPaint transform(final GradientPaint paint, 094 final Shape target) { 095 096 GradientPaint result = paint; 097 final Rectangle2D bounds = target.getBounds2D(); 098 099 if (this.type.equals(GradientPaintTransformType.VERTICAL)) { 100 result = new GradientPaint( 101 (float) bounds.getCenterX(), (float) bounds.getMinY(), 102 paint.getColor1(), (float) bounds.getCenterX(), 103 (float) bounds.getMaxY(), paint.getColor2() 104 ); 105 } 106 else if (this.type.equals(GradientPaintTransformType.HORIZONTAL)) { 107 result = new GradientPaint( 108 (float) bounds.getMinX(), (float) bounds.getCenterY(), 109 paint.getColor1(), (float) bounds.getMaxX(), 110 (float) bounds.getCenterY(), paint.getColor2() 111 ); 112 } 113 else if (this.type.equals(GradientPaintTransformType.CENTER_HORIZONTAL)) 114 { 115 result = new GradientPaint( 116 (float) bounds.getCenterX(), (float) bounds.getCenterY(), 117 paint.getColor1(), (float) bounds.getMaxX(), 118 (float) bounds.getCenterY(), paint.getColor2(), true 119 ); 120 } 121 else if (this.type.equals(GradientPaintTransformType.CENTER_VERTICAL)) { 122 result = new GradientPaint( 123 (float) bounds.getCenterX(), (float) bounds.getMinY(), 124 paint.getColor1(), (float) bounds.getCenterX(), 125 (float) bounds.getCenterY(), paint.getColor2(), true 126 ); 127 } 128 129 return result; 130 } 131 132 /** 133 * Tests this instance for equality with an arbitrary object. 134 * 135 * @param obj the object to test against (<code>null</code> permitted). 136 * 137 * @return A boolean. 138 */ 139 public boolean equals(final Object obj) { 140 if (obj == this) { 141 return true; 142 } 143 if (!(obj instanceof StandardGradientPaintTransformer)) { 144 return false; 145 } 146 final StandardGradientPaintTransformer that 147 = (StandardGradientPaintTransformer) obj; 148 if (this.type != that.type) { 149 return false; 150 } 151 return true; 152 } 153 154 /** 155 * Returns a clone of the transformer. 156 * 157 * @return A clone. 158 * 159 * @throws CloneNotSupportedException not thrown by this class, but 160 * subclasses (if any) might. 161 */ 162 public Object clone() throws CloneNotSupportedException { 163 return super.clone(); 164 } 165 166 /** 167 * Returns a hash code for this object. 168 * 169 * @return A hash code. 170 */ 171 public int hashCode() { 172 return (this.type != null ? this.type.hashCode() : 0); 173 } 174 175 }