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1: /* ======================================================================== 2: * JCommon : a free general purpose class library for the Java(tm) platform 3: * ======================================================================== 4: * 5: * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors. 6: * 7: * Project Info: http://www.jfree.org/jcommon/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: * StandardGradientPaintTransformer.java 29: * ------------------------------------- 30: * (C) Copyright 2003-2005, by Object Refinery Limited. 31: * 32: * Original Author: David Gilbert (for Object Refinery Limited); 33: * Contributor(s): -; 34: * 35: * $Id: StandardGradientPaintTransformer.java,v 1.8 2005/10/18 13:18:34 mungady Exp $ 36: * 37: * Changes 38: * ------- 39: * 28-Oct-2003 : Version 1 (DG); 40: * 19-Mar-2004 : Added equals() method (DG); 41: * 42: */ 43: 44: package org.jfree.ui; 45: 46: import java.awt.GradientPaint; 47: import java.awt.Shape; 48: import java.awt.geom.Rectangle2D; 49: import java.io.Serializable; 50: 51: import org.jfree.util.PublicCloneable; 52: 53: /** 54: * Transforms a <code>GradientPaint</code> to range over the width of a target 55: * shape. 56: * @author David Gilbert 57: */ 58: public class StandardGradientPaintTransformer 59: implements GradientPaintTransformer, Cloneable, PublicCloneable, 60: Serializable { 61: 62: /** For serialization. */ 63: private static final long serialVersionUID = -8155025776964678320L; 64: 65: /** The transform type. */ 66: private GradientPaintTransformType type; 67: 68: /** 69: * Creates a new transformer. 70: */ 71: public StandardGradientPaintTransformer() { 72: this(GradientPaintTransformType.VERTICAL); 73: } 74: 75: /** 76: * Creates a new transformer. 77: * 78: * @param type the transform type. 79: */ 80: public StandardGradientPaintTransformer( 81: final GradientPaintTransformType type) { 82: this.type = type; 83: } 84: 85: /** 86: * Transforms a <code>GradientPaint</code> instance. 87: * 88: * @param paint the original paint. 89: * @param target the target shape. 90: * 91: * @return The transformed paint. 92: */ 93: public GradientPaint transform(final GradientPaint paint, 94: final Shape target) { 95: 96: GradientPaint result = paint; 97: final Rectangle2D bounds = target.getBounds2D(); 98: 99: 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: }