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 (pt1.equals(pt2)) 124 { 125 Color[] colors = getStopColors(); 126 paint = colors.length > 0 ? colors[0] : Color.black; 127 } else if (gradientUnits == GU_USER_SPACE_ON_USE) 128 { 129 paint = new com.kitfox.svg.batik.RadialGradientPaint( 130 pt1, 131 r, 132 pt2, 133 getStopFractions(), 134 getStopColors(), 135 method, 136 com.kitfox.svg.batik.MultipleGradientPaint.SRGB, 137 gradientTransform); 138 } else 139 { 140 AffineTransform viewXform = new AffineTransform(); 141 viewXform.translate(bounds.getX(), bounds.getY()); 142 viewXform.scale(bounds.getWidth(), bounds.getHeight()); 143 144 viewXform.concatenate(gradientTransform); 145 146 paint = new com.kitfox.svg.batik.RadialGradientPaint( 147 pt1, 148 r, 149 pt2, 150 getStopFractions(), 151 getStopColors(), 152 method, 153 com.kitfox.svg.batik.MultipleGradientPaint.SRGB, 154 viewXform); 155 } 156 157 return paint; 158 } 159 160 /** 161 * Updates all attributes in this diagram associated with a time event. Ie, 162 * all attributes with track information. 163 * 164 * @return - true if this node has changed state as a result of the time 165 * update 166 */ 167 public boolean updateTime(double curTime) throws SVGException 168 { 169// if (trackManager.getNumTracks() == 0) return false; 170 boolean changeState = super.updateTime(curTime); 171 172 //Get current values for parameters 173 StyleAttribute sty = new StyleAttribute(); 174 boolean shapeChange = false; 175 176 if (getPres(sty.setName("cx"))) 177 { 178 float newVal = sty.getFloatValueWithUnits(); 179 if (newVal != cx) 180 { 181 cx = newVal; 182 shapeChange = true; 183 } 184 } 185 186 if (getPres(sty.setName("cy"))) 187 { 188 float newVal = sty.getFloatValueWithUnits(); 189 if (newVal != cy) 190 { 191 cy = newVal; 192 shapeChange = true; 193 } 194 } 195 196 if (getPres(sty.setName("fx"))) 197 { 198 float newVal = sty.getFloatValueWithUnits(); 199 if (newVal != fx) 200 { 201 fx = newVal; 202 shapeChange = true; 203 } 204 } 205 206 if (getPres(sty.setName("fy"))) 207 { 208 float newVal = sty.getFloatValueWithUnits(); 209 if (newVal != fy) 210 { 211 fy = newVal; 212 shapeChange = true; 213 } 214 } 215 216 if (getPres(sty.setName("r"))) 217 { 218 float newVal = sty.getFloatValueWithUnits(); 219 if (newVal != r) 220 { 221 r = newVal; 222 shapeChange = true; 223 } 224 } 225 226 return changeState; 227 } 228}