source: josm/trunk/src/org/openstreetmap/josm/gui/layer/gpx/GpxDrawHelper.java@ 7937

Last change on this file since 7937 was 7937, checked in by bastiK, 9 years ago

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1// License: GPL. See LICENSE file for details.
2package org.openstreetmap.josm.gui.layer.gpx;
3
4import static org.openstreetmap.josm.tools.I18n.marktr;
5import static org.openstreetmap.josm.tools.I18n.tr;
6
7import java.awt.BasicStroke;
8import java.awt.Color;
9import java.awt.Graphics2D;
10import java.awt.Point;
11import java.awt.RenderingHints;
12import java.awt.Stroke;
13import java.util.Collection;
14import java.util.Date;
15import java.util.List;
16
17import org.openstreetmap.josm.Main;
18import org.openstreetmap.josm.data.coor.LatLon;
19import org.openstreetmap.josm.data.gpx.GpxConstants;
20import org.openstreetmap.josm.data.gpx.GpxData;
21import org.openstreetmap.josm.data.gpx.WayPoint;
22import org.openstreetmap.josm.gui.MapView;
23import org.openstreetmap.josm.tools.ColorScale;
24
25/**
26 * Class that helps to draw large set of GPS tracks with different colors and options
27 * @since 7319
28 */
29public class GpxDrawHelper {
30 private GpxData data;
31
32 // draw lines between points belonging to different segments
33 private boolean forceLines;
34 // draw direction arrows on the lines
35 private boolean direction;
36 /** don't draw lines if longer than x meters **/
37 private int lineWidth;
38 private int maxLineLength;
39 private boolean lines;
40 /** paint large dots for points **/
41 private boolean large;
42 private int largesize;
43 private boolean hdopCircle;
44 /** paint direction arrow with alternate math. may be faster **/
45 private boolean alternateDirection;
46 /** don't draw arrows nearer to each other than this **/
47 private int delta;
48 private double minTrackDurationForTimeColoring;
49
50 private int hdopfactor;
51
52 private static final double PHI = Math.toRadians(15);
53
54 //// Variables used only to check cache validity
55 private boolean computeCacheInSync = false;
56 private int computeCacheMaxLineLengthUsed;
57 private Color computeCacheColorUsed;
58 private boolean computeCacheColorDynamic;
59 private ColorMode computeCacheColored;
60 private int computeCacheColorTracksTune;
61
62 //// Color-related fields
63 /** Mode of the line coloring **/
64 private ColorMode colored;
65 /** max speed for coloring - allows to tweak line coloring for different speed levels. **/
66 private int colorTracksTune;
67 private boolean colorModeDynamic;
68 private Color neutralColor;
69 private int largePointAlpha;
70
71 // default access is used to allow changing from plugins
72 ColorScale velocityScale;
73 /** Colors (without custom alpha channel, if given) for HDOP painting. **/
74 ColorScale hdopScale;
75 ColorScale dateScale;
76 ColorScale directionScale;
77
78 /** Opacity for hdop points **/
79 private int hdopAlpha;
80
81
82 // lookup array to draw arrows without doing any math
83 private static final int ll0 = 9;
84 private static final int sl4 = 5;
85 private static final int sl9 = 3;
86 private static final int[][] dir = { { +sl4, +ll0, +ll0, +sl4 }, { -sl9, +ll0, +sl9, +ll0 }, { -ll0, +sl4, -sl4, +ll0 },
87 { -ll0, -sl9, -ll0, +sl9 }, { -sl4, -ll0, -ll0, -sl4 }, { +sl9, -ll0, -sl9, -ll0 },
88 { +ll0, -sl4, +sl4, -ll0 }, { +ll0, +sl9, +ll0, -sl9 }, { +sl4, +ll0, +ll0, +sl4 },
89 { -sl9, +ll0, +sl9, +ll0 }, { -ll0, +sl4, -sl4, +ll0 }, { -ll0, -sl9, -ll0, +sl9 } };
90
91 private void setupColors() {
92 hdopAlpha = Main.pref.getInteger("hdop.color.alpha", -1);
93 velocityScale = ColorScale.createHSBScale(256).addTitle(tr("Velocity, km/h"));
94 /** Colors (without custom alpha channel, if given) for HDOP painting. **/
95 hdopScale = ColorScale.createHSBScale(256).makeReversed().addTitle(tr("HDOP, m"));
96 dateScale = ColorScale.createHSBScale(256).addTitle(tr("Time"));
97 directionScale = ColorScale.createCyclicScale(256).setIntervalCount(4).addTitle(tr("Direction"));
98 }
99
100 /**
101 * Different color modes
102 */
103 public enum ColorMode {
104 NONE, VELOCITY, HDOP, DIRECTION, TIME
105 }
106
107 /**
108 * Constructs a new {@code GpxDrawHelper}.
109 * @param gpxData GPX data
110 */
111 public GpxDrawHelper(GpxData gpxData) {
112 data = gpxData;
113 setupColors();
114 }
115
116 private static String specName(String layerName) {
117 return "layer " + layerName;
118 }
119
120 /**
121 * Get the default color for gps tracks for specified layer
122 * @param layerName name of the GpxLayer
123 * @param ignoreCustom do not use preferences
124 * @return the color or null if the color is not constant
125 */
126 public Color getColor(String layerName, boolean ignoreCustom) {
127 Color c = Main.pref.getColor(marktr("gps point"), specName(layerName), Color.gray);
128 return ignoreCustom || getColorMode(layerName) == ColorMode.NONE ? c : null;
129 }
130
131 /**
132 * Read coloring mode for specified layer from preferences
133 * @param layerName name of the GpxLayer
134 * @return coloting mode
135 */
136 public ColorMode getColorMode(String layerName) {
137 try {
138 int i = Main.pref.getInteger("draw.rawgps.colors", specName(layerName), 0);
139 return ColorMode.values()[i];
140 } catch (Exception e) {
141 Main.warn(e);
142 }
143 return ColorMode.NONE;
144 }
145
146 /** Reads generic color from preferences (usually gray)
147 * @return the color
148 **/
149 public static Color getGenericColor() {
150 return Main.pref.getColor(marktr("gps point"), Color.gray);
151 }
152
153 /**
154 * Read all drawing-related settings from preferences
155 * @param layerName layer name used to access its specific preferences
156 **/
157 public void readPreferences(String layerName) {
158 String spec = specName(layerName);
159 forceLines = Main.pref.getBoolean("draw.rawgps.lines.force", spec, false);
160 direction = Main.pref.getBoolean("draw.rawgps.direction", spec, false);
161 lineWidth = Main.pref.getInteger("draw.rawgps.linewidth", spec, 0);
162
163 if (!data.fromServer) {
164 maxLineLength = Main.pref.getInteger("draw.rawgps.max-line-length.local", spec, -1);
165 lines = Main.pref.getBoolean("draw.rawgps.lines.local", spec, true);
166 } else {
167 maxLineLength = Main.pref.getInteger("draw.rawgps.max-line-length", spec, 200);
168 lines = Main.pref.getBoolean("draw.rawgps.lines", spec, true);
169 }
170 large = Main.pref.getBoolean("draw.rawgps.large", spec, false);
171 largesize = Main.pref.getInteger("draw.rawgps.large.size", spec, 3);
172 hdopCircle = Main.pref.getBoolean("draw.rawgps.hdopcircle", spec, false);
173 colored = getColorMode(layerName);
174 alternateDirection = Main.pref.getBoolean("draw.rawgps.alternatedirection", spec, false);
175 delta = Main.pref.getInteger("draw.rawgps.min-arrow-distance", spec, 40);
176 colorTracksTune = Main.pref.getInteger("draw.rawgps.colorTracksTune", spec, 45);
177 colorModeDynamic = Main.pref.getBoolean("draw.rawgps.colors.dynamic", spec, false);
178 hdopfactor = Main.pref.getInteger("hdop.factor", 25);
179 minTrackDurationForTimeColoring = Main.pref.getInteger("draw.rawgps.date-coloring-min-dt", 60);
180 largePointAlpha = Main.pref.getInteger("draw.rawgps.large.alpha", -1) & 0xFF;
181
182 neutralColor = getColor(layerName, true);
183 velocityScale.setNoDataColor(neutralColor);
184 dateScale.setNoDataColor(neutralColor);
185 hdopScale.setNoDataColor(neutralColor);
186 directionScale.setNoDataColor(neutralColor);
187
188 largesize += lineWidth;
189 }
190
191
192 public void drawAll(Graphics2D g, MapView mv, List<WayPoint> visibleSegments) {
193
194 checkCache();
195
196 // STEP 2b - RE-COMPUTE CACHE DATA *********************
197 if (!computeCacheInSync) { // don't compute if the cache is good
198 calculateColors();
199 }
200
201 Stroke storedStroke = g.getStroke();
202
203 g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
204 Main.pref.getBoolean("mappaint.gpx.use-antialiasing", false) ?
205 RenderingHints.VALUE_ANTIALIAS_ON : RenderingHints.VALUE_ANTIALIAS_OFF);
206
207 if (lineWidth != 0) {
208 g.setStroke(new BasicStroke(lineWidth,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND));
209 }
210 fixColors(visibleSegments);
211 drawLines(g, mv, visibleSegments);
212 drawArrows(g, mv, visibleSegments);
213 drawPoints(g, mv, visibleSegments);
214 if (lineWidth != 0) {
215 g.setStroke(storedStroke);
216 }
217 }
218
219 public void calculateColors() {
220 double minval = +1e10;
221 double maxval = -1e10;
222 WayPoint oldWp = null;
223
224 if (colorModeDynamic) {
225 if (colored == ColorMode.VELOCITY) {
226 for (Collection<WayPoint> segment : data.getLinesIterable(null)) {
227 if(!forceLines) {
228 oldWp = null;
229 }
230 for (WayPoint trkPnt : segment) {
231 LatLon c = trkPnt.getCoor();
232 if (Double.isNaN(c.lat()) || Double.isNaN(c.lon())) {
233 continue;
234 }
235 if (oldWp != null && trkPnt.time > oldWp.time) {
236 double vel = c.greatCircleDistance(oldWp.getCoor())
237 / (trkPnt.time - oldWp.time);
238 if(vel > maxval) {
239 maxval = vel;
240 }
241 if(vel < minval) {
242 minval = vel;
243 }
244 }
245 oldWp = trkPnt;
246 }
247 }
248 if (minval >= maxval) {
249 velocityScale.setRange(0, 120/3.6);
250 } else {
251 velocityScale.setRange(minval, maxval);
252 }
253 } else if (colored == ColorMode.HDOP) {
254 for (Collection<WayPoint> segment : data.getLinesIterable(null)) {
255 for (WayPoint trkPnt : segment) {
256 Object val = trkPnt.get(GpxConstants.PT_HDOP);
257 if (val != null) {
258 double hdop = ((Float) val).doubleValue();
259 if(hdop > maxval) {
260 maxval = hdop;
261 }
262 if(hdop < minval) {
263 minval = hdop;
264 }
265 }
266 }
267 }
268 if (minval >= maxval) {
269 hdopScale.setRange(0, 100);
270 } else {
271 hdopScale.setRange(minval, maxval);
272 }
273 }
274 oldWp = null;
275 } else { // color mode not dynamic
276 velocityScale.setRange(0, colorTracksTune);
277 hdopScale.setRange(0, 1.0/hdopfactor);
278 }
279 double now = System.currentTimeMillis()/1000.0;
280 if (colored == ColorMode.TIME) {
281 Date[] bounds = data.getMinMaxTimeForAllTracks();
282 if (bounds!=null) {
283 minval = bounds[0].getTime()/1000.0;
284 maxval = bounds[1].getTime()/1000.0;
285 } else {
286 minval = 0; maxval=now;
287 }
288 dateScale.setRange(minval, maxval);
289 }
290
291
292 // Now the colors for all the points will be assigned
293 for (Collection<WayPoint> segment : data.getLinesIterable(null)) {
294 if (!forceLines) { // don't draw lines between segments, unless forced to
295 oldWp = null;
296 }
297 for (WayPoint trkPnt : segment) {
298 LatLon c = trkPnt.getCoor();
299 trkPnt.customColoring = neutralColor;
300 if (Double.isNaN(c.lat()) || Double.isNaN(c.lon())) {
301 continue;
302 }
303 // now we are sure some color will be assigned
304 Color color = null;
305
306 if (colored == ColorMode.HDOP) {
307 Float hdop = (Float) trkPnt.get(GpxConstants.PT_HDOP);
308 color = hdopScale.getColor(hdop);
309 }
310 if (oldWp != null) { // other coloring modes need segment for calcuation
311 double dist = c.greatCircleDistance(oldWp.getCoor());
312 boolean noDraw=false;
313 switch (colored) {
314 case VELOCITY:
315 double dtime = trkPnt.time - oldWp.time;
316 if(dtime > 0) {
317 color = velocityScale.getColor(dist / dtime);
318 } else {
319 color = velocityScale.getNoDataColor();
320 }
321 break;
322 case DIRECTION:
323 double dirColor = oldWp.getCoor().heading(trkPnt.getCoor());
324 color = directionScale.getColor(dirColor);
325 break;
326 case TIME:
327 double t=trkPnt.time;
328 if (t > 0 && t <= now && maxval - minval > minTrackDurationForTimeColoring) { // skip bad timestamps and very short tracks
329 color = dateScale.getColor(t);
330 } else {
331 color = dateScale.getNoDataColor();
332 }
333 break;
334 }
335 if (!noDraw && (maxLineLength == -1 || dist <= maxLineLength)) {
336 trkPnt.drawLine = true;
337 trkPnt.dir = (int) oldWp.getCoor().heading(trkPnt.getCoor());
338 } else {
339 trkPnt.drawLine = false;
340 }
341 } else { // make sure we reset outdated data
342 trkPnt.drawLine = false;
343 color = neutralColor;
344 }
345 if (color!=null) {
346 trkPnt.customColoring = color;
347 }
348 oldWp = trkPnt;
349 }
350 }
351
352 computeCacheInSync = true;
353 }
354
355 private void drawLines(Graphics2D g, MapView mv, List<WayPoint> visibleSegments) {
356 if (lines) {
357 Point old = null;
358 for (WayPoint trkPnt : visibleSegments) {
359 LatLon c = trkPnt.getCoor();
360 if (Double.isNaN(c.lat()) || Double.isNaN(c.lon())) {
361 continue;
362 }
363 Point screen = mv.getPoint(trkPnt.getEastNorth());
364 // skip points that are on the same screenposition
365 if (trkPnt.drawLine && old != null && ((old.x != screen.x) || (old.y != screen.y))) {
366 g.setColor(trkPnt.customColoring);
367 g.drawLine(old.x, old.y, screen.x, screen.y);
368 }
369 old = screen;
370 }
371 }
372 }
373
374 private void drawArrows(Graphics2D g, MapView mv, List<WayPoint> visibleSegments) {
375 /****************************************************************
376 ********** STEP 3b - DRAW NICE ARROWS **************************
377 ****************************************************************/
378 if (lines && direction && !alternateDirection) {
379 Point old = null;
380 Point oldA = null; // last arrow painted
381 for (WayPoint trkPnt : visibleSegments) {
382 LatLon c = trkPnt.getCoor();
383 if (Double.isNaN(c.lat()) || Double.isNaN(c.lon())) {
384 continue;
385 }
386 if (trkPnt.drawLine) {
387 Point screen = mv.getPoint(trkPnt.getEastNorth());
388 // skip points that are on the same screenposition
389 if (old != null
390 && (oldA == null || screen.x < oldA.x - delta || screen.x > oldA.x + delta
391 || screen.y < oldA.y - delta || screen.y > oldA.y + delta)) {
392 g.setColor(trkPnt.customColoring);
393 double t = Math.atan2(screen.y - old.y, screen.x - old.x) + Math.PI;
394 g.drawLine(screen.x, screen.y, (int) (screen.x + 10 * Math.cos(t - PHI)),
395 (int) (screen.y + 10 * Math.sin(t - PHI)));
396 g.drawLine(screen.x, screen.y, (int) (screen.x + 10 * Math.cos(t + PHI)),
397 (int) (screen.y + 10 * Math.sin(t + PHI)));
398 oldA = screen;
399 }
400 old = screen;
401 }
402 } // end for trkpnt
403 }
404
405 /****************************************************************
406 ********** STEP 3c - DRAW FAST ARROWS **************************
407 ****************************************************************/
408 if (lines && direction && alternateDirection) {
409 Point old = null;
410 Point oldA = null; // last arrow painted
411 for (WayPoint trkPnt : visibleSegments) {
412 LatLon c = trkPnt.getCoor();
413 if (Double.isNaN(c.lat()) || Double.isNaN(c.lon())) {
414 continue;
415 }
416 if (trkPnt.drawLine) {
417 Point screen = mv.getPoint(trkPnt.getEastNorth());
418 // skip points that are on the same screenposition
419 if (old != null
420 && (oldA == null || screen.x < oldA.x - delta || screen.x > oldA.x + delta
421 || screen.y < oldA.y - delta || screen.y > oldA.y + delta)) {
422 g.setColor(trkPnt.customColoring);
423 g.drawLine(screen.x, screen.y, screen.x + dir[trkPnt.dir][0], screen.y
424 + dir[trkPnt.dir][1]);
425 g.drawLine(screen.x, screen.y, screen.x + dir[trkPnt.dir][2], screen.y
426 + dir[trkPnt.dir][3]);
427 oldA = screen;
428 }
429 old = screen;
430 }
431 } // end for trkpnt
432 }
433 }
434
435 private void drawPoints(Graphics2D g, MapView mv, List<WayPoint> visibleSegments) {
436 /****************************************************************
437 ********** STEP 3d - DRAW LARGE POINTS AND HDOP CIRCLE *********
438 ****************************************************************/
439 if (large || hdopCircle) {
440 final int halfSize = largesize/2;
441 for (WayPoint trkPnt : visibleSegments) {
442 LatLon c = trkPnt.getCoor();
443 if (Double.isNaN(c.lat()) || Double.isNaN(c.lon())) {
444 continue;
445 }
446 Point screen = mv.getPoint(trkPnt.getEastNorth());
447
448
449 if (hdopCircle && trkPnt.get(GpxConstants.PT_HDOP) != null) {
450 // hdop value
451 float hdop = (Float)trkPnt.get(GpxConstants.PT_HDOP);
452 if (hdop < 0) {
453 hdop = 0;
454 }
455 Color customColoringTransparent = hdopAlpha<0 ? trkPnt.customColoring:
456 new Color(trkPnt.customColoring.getRGB() & 0x00ffffff | hdopAlpha<<24, true);
457 g.setColor(customColoringTransparent);
458 // hdop cirles
459 int hdopp = mv.getPoint(new LatLon(trkPnt.getCoor().lat(), trkPnt.getCoor().lon() + 2*6*hdop*360/40000000)).x - screen.x;
460 g.drawArc(screen.x-hdopp/2, screen.y-hdopp/2, hdopp, hdopp, 0, 360);
461 }
462 if (large) {
463 // color the large GPS points like the gps lines
464 if (trkPnt.customColoring != null) {
465 Color customColoringTransparent = largePointAlpha<0 ? trkPnt.customColoring:
466 new Color(trkPnt.customColoring.getRGB() & 0x00ffffff | largePointAlpha<<24, true);
467
468 g.setColor(customColoringTransparent);
469 }
470 g.fillRect(screen.x-halfSize, screen.y-halfSize, largesize, largesize);
471 }
472 } // end for trkpnt
473 } // end if large || hdopcircle
474
475 /****************************************************************
476 ********** STEP 3e - DRAW SMALL POINTS FOR LINES ***************
477 ****************************************************************/
478 if (!large && lines) {
479 g.setColor(neutralColor);
480 for (WayPoint trkPnt : visibleSegments) {
481 LatLon c = trkPnt.getCoor();
482 if (Double.isNaN(c.lat()) || Double.isNaN(c.lon())) {
483 continue;
484 }
485 if (!trkPnt.drawLine) {
486 Point screen = mv.getPoint(trkPnt.getEastNorth());
487 g.drawRect(screen.x, screen.y, 0, 0);
488 }
489 } // end for trkpnt
490 } // end if large
491
492 /****************************************************************
493 ********** STEP 3f - DRAW SMALL POINTS INSTEAD OF LINES ********
494 ****************************************************************/
495 if (!large && !lines) {
496 g.setColor(neutralColor);
497 for (WayPoint trkPnt : visibleSegments) {
498 LatLon c = trkPnt.getCoor();
499 if (Double.isNaN(c.lat()) || Double.isNaN(c.lon())) {
500 continue;
501 }
502 Point screen = mv.getPoint(trkPnt.getEastNorth());
503 g.setColor(trkPnt.customColoring);
504 g.drawRect(screen.x, screen.y, 0, 0);
505 } // end for trkpnt
506 } // end if large
507 }
508
509 private void fixColors(List<WayPoint> visibleSegments) {
510 for (WayPoint trkPnt : visibleSegments) {
511 if (trkPnt.customColoring == null) {
512 trkPnt.customColoring = neutralColor;
513 }
514 }
515 }
516
517 /**
518 * Check cache validity set necessary flags
519 */
520 private void checkCache() {
521 if ((computeCacheMaxLineLengthUsed != maxLineLength) || (!neutralColor.equals(computeCacheColorUsed))
522 || (computeCacheColored != colored) || (computeCacheColorTracksTune != colorTracksTune)
523 || (computeCacheColorDynamic != colorModeDynamic)) {
524 computeCacheMaxLineLengthUsed = maxLineLength;
525 computeCacheInSync = false;
526 computeCacheColorUsed = neutralColor;
527 computeCacheColored = colored;
528 computeCacheColorTracksTune = colorTracksTune;
529 computeCacheColorDynamic = colorModeDynamic;
530 }
531 }
532
533 public void dataChanged() {
534 computeCacheInSync = false;
535 }
536
537 public void drawColorBar(Graphics2D g, MapView mv) {
538 int w = mv.getWidth();
539 if (colored == ColorMode.HDOP) {
540 hdopScale.drawColorBar(g, w-30, 50, 20, 100, 1.0);
541 } else if (colored == ColorMode.VELOCITY) {
542 velocityScale.drawColorBar(g, w-30, 50, 20, 100, 3.6);
543 } else if (colored == ColorMode.DIRECTION) {
544 directionScale.drawColorBar(g, w-30, 50, 20, 100, 180.0/Math.PI);
545 }
546 }
547}
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