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 */ 034package com.kitfox.svg; 035 036import com.kitfox.svg.xml.StyleAttribute; 037import java.awt.Graphics2D; 038import java.awt.Rectangle; 039import java.awt.Shape; 040import java.awt.geom.AffineTransform; 041import java.awt.geom.PathIterator; 042import java.awt.geom.Rectangle2D; 043import java.util.ArrayList; 044 045/** 046 * 047 * @author kitfox 048 */ 049public class Marker extends Group 050{ 051 public static final String TAG_NAME = "marker"; 052 053 AffineTransform viewXform; 054 AffineTransform markerXform; 055 Rectangle2D viewBox; 056 float refX; 057 float refY; 058 float markerWidth = 3; 059 float markerHeight = 3; 060 float orient = Float.NaN; 061 boolean markerUnitsStrokeWidth = true; //if set to false 'userSpaceOnUse' is assumed 062 063 public String getTagName() 064 { 065 return TAG_NAME; 066 } 067 068 protected void build() throws SVGException 069 { 070 super.build(); 071 072 StyleAttribute sty = new StyleAttribute(); 073 074 if (getPres(sty.setName("refX"))) 075 { 076 refX = sty.getFloatValueWithUnits(); 077 } 078 if (getPres(sty.setName("refY"))) 079 { 080 refY = sty.getFloatValueWithUnits(); 081 } 082 if (getPres(sty.setName("markerWidth"))) 083 { 084 markerWidth = sty.getFloatValueWithUnits(); 085 } 086 if (getPres(sty.setName("markerHeight"))) 087 { 088 markerHeight = sty.getFloatValueWithUnits(); 089 } 090 091 if (getPres(sty.setName("orient"))) 092 { 093 if ("auto".equals(sty.getStringValue())) 094 { 095 orient = Float.NaN; 096 } else 097 { 098 orient = sty.getFloatValue(); 099 } 100 } 101 102 if (getPres(sty.setName("viewBox"))) 103 { 104 float[] dim = sty.getFloatList(); 105 viewBox = new Rectangle2D.Float(dim[0], dim[1], dim[2], dim[3]); 106 } 107 108 if (viewBox == null) 109 { 110 viewBox = new Rectangle(0, 0, 1, 1); 111 } 112 113 if (getPres(sty.setName("markerUnits"))) 114 { 115 String markerUnits = sty.getStringValue(); 116 if (markerUnits != null && markerUnits.equals("userSpaceOnUse")) 117 { 118 markerUnitsStrokeWidth = false; 119 } 120 } 121 122 //Transform pattern onto unit square 123 viewXform = new AffineTransform(); 124 viewXform.scale(1.0 / viewBox.getWidth(), 1.0 / viewBox.getHeight()); 125 viewXform.translate(-viewBox.getX(), -viewBox.getY()); 126 127 markerXform = new AffineTransform(); 128 markerXform.scale(markerWidth, markerHeight); 129 markerXform.concatenate(viewXform); 130 markerXform.translate(-refX, -refY); 131 } 132 133 protected boolean outsideClip(Graphics2D g) throws SVGException 134 { 135 Shape clip = g.getClip(); 136 Rectangle2D rect = super.getBoundingBox(); 137 if (clip == null || clip.intersects(rect)) 138 { 139 return false; 140 } 141 142 return true; 143 144 } 145 146 public void render(Graphics2D g) throws SVGException 147 { 148 AffineTransform oldXform = g.getTransform(); 149 g.transform(markerXform); 150 151 super.render(g); 152 153 g.setTransform(oldXform); 154 } 155 156 public void render(Graphics2D g, MarkerPos pos, float strokeWidth) throws SVGException 157 { 158 AffineTransform cacheXform = g.getTransform(); 159 160 g.translate(pos.x, pos.y); 161 if (markerUnitsStrokeWidth) 162 { 163 g.scale(strokeWidth, strokeWidth); 164 } 165 166 g.rotate(Math.atan2(pos.dy, pos.dx)); 167 168 g.transform(markerXform); 169 170 super.render(g); 171 172 g.setTransform(cacheXform); 173 } 174 175 public Shape getShape() 176 { 177 Shape shape = super.getShape(); 178 return markerXform.createTransformedShape(shape); 179 } 180 181 public Rectangle2D getBoundingBox() throws SVGException 182 { 183 Rectangle2D rect = super.getBoundingBox(); 184 return markerXform.createTransformedShape(rect).getBounds2D(); 185 } 186 187 /** 188 * Updates all attributes in this diagram associated with a time event. Ie, 189 * all attributes with track information. 190 * 191 * @return - true if this node has changed state as a result of the time 192 * update 193 */ 194 public boolean updateTime(double curTime) throws SVGException 195 { 196 boolean changeState = super.updateTime(curTime); 197 198 //Marker properties do not change 199 return changeState; 200 } 201 202 //-------------------------------- 203 public static final int MARKER_START = 0; 204 public static final int MARKER_MID = 1; 205 public static final int MARKER_END = 2; 206 207 public static class MarkerPos 208 { 209 210 int type; 211 double x; 212 double y; 213 double dx; 214 double dy; 215 216 public MarkerPos(int type, double x, double y, double dx, double dy) 217 { 218 this.type = type; 219 this.x = x; 220 this.y = y; 221 this.dx = dx; 222 this.dy = dy; 223 } 224 } 225 226 public static class MarkerLayout 227 { 228 229 private ArrayList markerList = new ArrayList(); 230 boolean started = false; 231 232 public void layout(Shape shape) 233 { 234 double px = 0; 235 double py = 0; 236 double[] coords = new double[6]; 237 for (PathIterator it = shape.getPathIterator(null); 238 !it.isDone(); it.next()) 239 { 240 switch (it.currentSegment(coords)) 241 { 242 case PathIterator.SEG_MOVETO: 243 px = coords[0]; 244 py = coords[1]; 245 started = false; 246 break; 247 case PathIterator.SEG_CLOSE: 248 started = false; 249 break; 250 case PathIterator.SEG_LINETO: 251 { 252 double x = coords[0]; 253 double y = coords[1]; 254 markerIn(px, py, x - px, y - py); 255 markerOut(x, y, x - px, y - py); 256 px = x; 257 py = y; 258 break; 259 } 260 case PathIterator.SEG_QUADTO: 261 { 262 double k0x = coords[0]; 263 double k0y = coords[1]; 264 double x = coords[2]; 265 double y = coords[3]; 266 267 268 //Best in tangent 269 if (px != k0x || py != k0y) 270 { 271 markerIn(px, py, k0x - px, k0y - py); 272 } else 273 { 274 markerIn(px, py, x - px, y - py); 275 } 276 277 //Best out tangent 278 if (x != k0x || y != k0y) 279 { 280 markerOut(x, y, x - k0x, y - k0y); 281 } else 282 { 283 markerOut(x, y, x - px, y - py); 284 } 285 286 markerIn(px, py, k0x - px, k0y - py); 287 markerOut(x, y, x - k0x, y - k0y); 288 px = x; 289 py = y; 290 break; 291 } 292 case PathIterator.SEG_CUBICTO: 293 { 294 double k0x = coords[0]; 295 double k0y = coords[1]; 296 double k1x = coords[2]; 297 double k1y = coords[3]; 298 double x = coords[4]; 299 double y = coords[5]; 300 301 //Best in tangent 302 if (px != k0x || py != k0y) 303 { 304 markerIn(px, py, k0x - px, k0y - py); 305 } else if (px != k1x || py != k1y) 306 { 307 markerIn(px, py, k1x - px, k1y - py); 308 } else 309 { 310 markerIn(px, py, x - px, y - py); 311 } 312 313 //Best out tangent 314 if (x != k1x || y != k1y) 315 { 316 markerOut(x, y, x - k1x, y - k1y); 317 } else if (x != k0x || y != k0y) 318 { 319 markerOut(x, y, x - k0x, y - k0y); 320 } else 321 { 322 markerOut(x, y, x - px, y - py); 323 } 324 px = x; 325 py = y; 326 break; 327 } 328 } 329 } 330 331 for (int i = 1; i < markerList.size(); ++i) 332 { 333 MarkerPos prev = (MarkerPos) markerList.get(i - 1); 334 MarkerPos cur = (MarkerPos) markerList.get(i); 335 336 if (cur.type == MARKER_START) 337 { 338 prev.type = MARKER_END; 339 } 340 } 341 MarkerPos last = (MarkerPos) markerList.get(markerList.size() - 1); 342 last.type = MARKER_END; 343 } 344 345 private void markerIn(double x, double y, double dx, double dy) 346 { 347 if (started == false) 348 { 349 started = true; 350 markerList.add(new MarkerPos(MARKER_START, x, y, dx, dy)); 351 } 352 } 353 354 private void markerOut(double x, double y, double dx, double dy) 355 { 356 markerList.add(new MarkerPos(MARKER_MID, x, y, dx, dy)); 357 } 358 359 /** 360 * @return the markerList 361 */ 362 public ArrayList getMarkerList() 363 { 364 return markerList; 365 } 366 } 367}