source: josm/trunk/src/com/kitfox/svg/Marker.java@ 8132

Last change on this file since 8132 was 8084, checked in by bastiK, 9 years ago

add svn:eol-style=native for svgsalamander
  • Property svn:eol-style set to native
File size: 11.1 KB
Line 
1/*
2 * SVG Salamander
3 * Copyright (c) 2004, Mark McKay
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or
7 * without modification, are permitted provided that the following
8 * conditions are met:
9 *
10 * - Redistributions of source code must retain the above
11 * copyright notice, this list of conditions and the following
12 * disclaimer.
13 * - Redistributions in binary form must reproduce the above
14 * copyright notice, this list of conditions and the following
15 * disclaimer in the documentation and/or other materials
16 * provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
23 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
27 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29 * OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 * Mark McKay can be contacted at mark@kitfox.com. Salamander and other
32 * projects can be found at http://www.kitfox.com
33 */
34package com.kitfox.svg;
35
36import com.kitfox.svg.xml.StyleAttribute;
37import java.awt.Graphics2D;
38import java.awt.Rectangle;
39import java.awt.Shape;
40import java.awt.geom.AffineTransform;
41import java.awt.geom.PathIterator;
42import java.awt.geom.Rectangle2D;
43import java.util.ArrayList;
44
45/**
46 *
47 * @author kitfox
48 */
49public class Marker extends Group
50{
51 public static final String TAG_NAME = "marker";
52
53 AffineTransform viewXform;
54 AffineTransform markerXform;
55 Rectangle2D viewBox;
56 float refX;
57 float refY;
58 float markerWidth = 1;
59 float markerHeight = 1;
60 float orient = Float.NaN;
61 boolean markerUnitsStrokeWidth = true; //if set to false 'userSpaceOnUse' is assumed
62
63 public String getTagName()
64 {
65 return TAG_NAME;
66 }
67
68 protected void build() throws SVGException
69 {
70 super.build();
71
72 StyleAttribute sty = new StyleAttribute();
73
74 if (getPres(sty.setName("refX")))
75 {
76 refX = sty.getFloatValueWithUnits();
77 }
78 if (getPres(sty.setName("refY")))
79 {
80 refY = sty.getFloatValueWithUnits();
81 }
82 if (getPres(sty.setName("markerWidth")))
83 {
84 markerWidth = sty.getFloatValueWithUnits();
85 }
86 if (getPres(sty.setName("markerHeight")))
87 {
88 markerHeight = sty.getFloatValueWithUnits();
89 }
90
91 if (getPres(sty.setName("orient")))
92 {
93 if ("auto".equals(sty.getStringValue()))
94 {
95 orient = Float.NaN;
96 } else
97 {
98 orient = sty.getFloatValue();
99 }
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 build();
199
200 //Marker properties do not change
201 return changeState;
202 }
203
204 //--------------------------------
205 public static final int MARKER_START = 0;
206 public static final int MARKER_MID = 1;
207 public static final int MARKER_END = 2;
208
209 public static class MarkerPos
210 {
211
212 int type;
213 double x;
214 double y;
215 double dx;
216 double dy;
217
218 public MarkerPos(int type, double x, double y, double dx, double dy)
219 {
220 this.type = type;
221 this.x = x;
222 this.y = y;
223 this.dx = dx;
224 this.dy = dy;
225 }
226 }
227
228 public static class MarkerLayout
229 {
230
231 private ArrayList markerList = new ArrayList();
232 boolean started = false;
233
234 public void layout(Shape shape)
235 {
236 double px = 0;
237 double py = 0;
238 double[] coords = new double[6];
239 for (PathIterator it = shape.getPathIterator(null);
240 !it.isDone(); it.next())
241 {
242 switch (it.currentSegment(coords))
243 {
244 case PathIterator.SEG_MOVETO:
245 px = coords[0];
246 py = coords[1];
247 started = false;
248 break;
249 case PathIterator.SEG_CLOSE:
250 started = false;
251 break;
252 case PathIterator.SEG_LINETO:
253 {
254 double x = coords[0];
255 double y = coords[1];
256 markerIn(px, py, x - px, y - py);
257 markerOut(x, y, x - px, y - py);
258 px = x;
259 py = y;
260 break;
261 }
262 case PathIterator.SEG_QUADTO:
263 {
264 double k0x = coords[0];
265 double k0y = coords[1];
266 double x = coords[2];
267 double y = coords[3];
268
269
270 //Best in tangent
271 if (px != k0x || py != k0y)
272 {
273 markerIn(px, py, k0x - px, k0y - py);
274 } else
275 {
276 markerIn(px, py, x - px, y - py);
277 }
278
279 //Best out tangent
280 if (x != k0x || y != k0y)
281 {
282 markerOut(x, y, x - k0x, y - k0y);
283 } else
284 {
285 markerOut(x, y, x - px, y - py);
286 }
287
288 markerIn(px, py, k0x - px, k0y - py);
289 markerOut(x, y, x - k0x, y - k0y);
290 px = x;
291 py = y;
292 break;
293 }
294 case PathIterator.SEG_CUBICTO:
295 {
296 double k0x = coords[0];
297 double k0y = coords[1];
298 double k1x = coords[2];
299 double k1y = coords[3];
300 double x = coords[4];
301 double y = coords[5];
302
303 //Best in tangent
304 if (px != k0x || py != k0y)
305 {
306 markerIn(px, py, k0x - px, k0y - py);
307 } else if (px != k1x || py != k1y)
308 {
309 markerIn(px, py, k1x - px, k1y - py);
310 } else
311 {
312 markerIn(px, py, x - px, y - py);
313 }
314
315 //Best out tangent
316 if (x != k1x || y != k1y)
317 {
318 markerOut(x, y, x - k1x, y - k1y);
319 } else if (x != k0x || y != k0y)
320 {
321 markerOut(x, y, x - k0x, y - k0y);
322 } else
323 {
324 markerOut(x, y, x - px, y - py);
325 }
326 px = x;
327 py = y;
328 break;
329 }
330 }
331 }
332
333 for (int i = 1; i < markerList.size(); ++i)
334 {
335 MarkerPos prev = (MarkerPos) markerList.get(i - 1);
336 MarkerPos cur = (MarkerPos) markerList.get(i);
337
338 if (cur.type == MARKER_START)
339 {
340 prev.type = MARKER_END;
341 }
342 }
343 MarkerPos last = (MarkerPos) markerList.get(markerList.size() - 1);
344 last.type = MARKER_END;
345 }
346
347 private void markerIn(double x, double y, double dx, double dy)
348 {
349 if (started == false)
350 {
351 started = true;
352 markerList.add(new MarkerPos(MARKER_START, x, y, dx, dy));
353 }
354 }
355
356 private void markerOut(double x, double y, double dx, double dy)
357 {
358 markerList.add(new MarkerPos(MARKER_MID, x, y, dx, dy));
359 }
360
361 /**
362 * @return the markerList
363 */
364 public ArrayList getMarkerList()
365 {
366 return markerList;
367 }
368 }
369}
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