001/* 002 * SVG Salamander 003 * Copyright (c) 2004, Mark McKay 004 * All rights reserved. 005 * 006 * Redistribution and use in source and binary forms, with or 007 * without modification, are permitted provided that the following 008 * conditions are met: 009 * 010 * - Redistributions of source code must retain the above 011 * copyright notice, this list of conditions and the following 012 * disclaimer. 013 * - Redistributions in binary form must reproduce the above 014 * copyright notice, this list of conditions and the following 015 * disclaimer in the documentation and/or other materials 016 * provided with the distribution. 017 * 018 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 019 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 020 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 021 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 022 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 023 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 024 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 025 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 026 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 027 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 028 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 029 * OF THE POSSIBILITY OF SUCH DAMAGE. 030 * 031 * Mark McKay can be contacted at mark@kitfox.com. Salamander and other 032 * projects can be found at http://www.kitfox.com 033 * 034 * Created on January 26, 2004, 1:55 AM 035 */ 036package com.kitfox.svg; 037 038import com.kitfox.svg.xml.StyleAttribute; 039import java.awt.Color; 040import java.awt.Paint; 041import java.awt.geom.AffineTransform; 042import java.awt.geom.Point2D; 043import java.awt.geom.Rectangle2D; 044 045/** 046 * @author Mark McKay 047 * @author <a href="mailto:mark@kitfox.com">Mark McKay</a> 048 */ 049public class RadialGradient extends Gradient 050{ 051 public static final String TAG_NAME = "radialgradient"; 052 053 float cx = 0.5f; 054 float cy = 0.5f; 055 float fx = 0.5f; 056 float fy = 0.5f; 057 float r = 0.5f; 058 059 /** 060 * Creates a new instance of RadialGradient 061 */ 062 public RadialGradient() 063 { 064 } 065 066 public String getTagName() 067 { 068 return TAG_NAME; 069 } 070 071 protected void build() throws SVGException 072 { 073 super.build(); 074 075 StyleAttribute sty = new StyleAttribute(); 076 077 if (getPres(sty.setName("cx"))) 078 { 079 cx = sty.getFloatValueWithUnits(); 080 } 081 082 if (getPres(sty.setName("cy"))) 083 { 084 cy = sty.getFloatValueWithUnits(); 085 } 086 087 if (getPres(sty.setName("fx"))) 088 { 089 fx = sty.getFloatValueWithUnits(); 090 } 091 092 if (getPres(sty.setName("fy"))) 093 { 094 fy = sty.getFloatValueWithUnits(); 095 } 096 097 if (getPres(sty.setName("r"))) 098 { 099 r = sty.getFloatValueWithUnits(); 100 } 101 } 102 103 public Paint getPaint(Rectangle2D bounds, AffineTransform xform) 104 { 105 com.kitfox.svg.batik.MultipleGradientPaint.CycleMethodEnum method; 106 switch (spreadMethod) 107 { 108 default: 109 case SM_PAD: 110 method = com.kitfox.svg.batik.MultipleGradientPaint.NO_CYCLE; 111 break; 112 case SM_REPEAT: 113 method = com.kitfox.svg.batik.MultipleGradientPaint.REPEAT; 114 break; 115 case SM_REFLECT: 116 method = com.kitfox.svg.batik.MultipleGradientPaint.REFLECT; 117 break; 118 } 119 120 Paint paint; 121 Point2D.Float pt1 = new Point2D.Float(cx, cy); 122 Point2D.Float pt2 = new Point2D.Float(fx, fy); 123 if (gradientUnits == GU_USER_SPACE_ON_USE) 124 { 125 paint = new com.kitfox.svg.batik.RadialGradientPaint( 126 pt1, 127 r, 128 pt2, 129 getStopFractions(), 130 getStopColors(), 131 method, 132 com.kitfox.svg.batik.MultipleGradientPaint.SRGB, 133 gradientTransform); 134 } else 135 { 136 AffineTransform viewXform = new AffineTransform(); 137 viewXform.translate(bounds.getX(), bounds.getY()); 138 viewXform.scale(bounds.getWidth(), bounds.getHeight()); 139 140 viewXform.concatenate(gradientTransform); 141 142 paint = new com.kitfox.svg.batik.RadialGradientPaint( 143 pt1, 144 r, 145 pt2, 146 getStopFractions(), 147 getStopColors(), 148 method, 149 com.kitfox.svg.batik.MultipleGradientPaint.SRGB, 150 viewXform); 151 } 152 153 return paint; 154 } 155 156 /** 157 * Updates all attributes in this diagram associated with a time event. Ie, 158 * all attributes with track information. 159 * 160 * @return - true if this node has changed state as a result of the time 161 * update 162 */ 163 public boolean updateTime(double curTime) throws SVGException 164 { 165// if (trackManager.getNumTracks() == 0) return false; 166 boolean changeState = super.updateTime(curTime); 167 168 //Get current values for parameters 169 StyleAttribute sty = new StyleAttribute(); 170 boolean shapeChange = false; 171 172 if (getPres(sty.setName("cx"))) 173 { 174 float newVal = sty.getFloatValueWithUnits(); 175 if (newVal != cx) 176 { 177 cx = newVal; 178 shapeChange = true; 179 } 180 } 181 182 if (getPres(sty.setName("cy"))) 183 { 184 float newVal = sty.getFloatValueWithUnits(); 185 if (newVal != cy) 186 { 187 cy = newVal; 188 shapeChange = true; 189 } 190 } 191 192 if (getPres(sty.setName("fx"))) 193 { 194 float newVal = sty.getFloatValueWithUnits(); 195 if (newVal != fx) 196 { 197 fx = newVal; 198 shapeChange = true; 199 } 200 } 201 202 if (getPres(sty.setName("fy"))) 203 { 204 float newVal = sty.getFloatValueWithUnits(); 205 if (newVal != fy) 206 { 207 fy = newVal; 208 shapeChange = true; 209 } 210 } 211 212 if (getPres(sty.setName("r"))) 213 { 214 float newVal = sty.getFloatValueWithUnits(); 215 if (newVal != r) 216 { 217 r = newVal; 218 shapeChange = true; 219 } 220 } 221 222 return changeState; 223 } 224}