Contents of /trunk/src/osm-gps-map-osd-classic.c

Parent Directory Parent Directory | Revision Log Revision Log

Revision 114 - (show annotations)
Wed Sep 16 20:04:38 2009 UTC (14 years, 7 months ago) by harbaum
File MIME type: text/plain
File size: 53467 byte(s) 
release 0.8.9
1 /* -*- Mode: C; indent-tabs-mode: nil; c-basic-offset: 4; tab-width: 4 -*- */
2 /* vim:set et sw=4 ts=4 cino=t0,(0: */
3 /*
4 * Copyright (C) Till Harbaum 2009 <till@harbaum.org>
5 *
6 * osm-gps-map is free software: you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
10 *
11 * osm-gps-map is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
14 * See the GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "config.h"
21 #include <stdlib.h> // abs
22 #include <math.h> // M_PI/cos()
23
24 /* parameters that can be overwritten from the config file: */
25 /* OSD_DIAMETER */
26 /* OSD_X, OSD_Y */
27
28 #ifndef USE_CAIRO
29 #error "OSD control display lacks a non-cairo implementation!"
30 #endif
31
32 #include <cairo.h>
33
34 #include "osm-gps-map.h"
35 #include "converter.h"
36 #include "osm-gps-map-osd-classic.h"
37
38 //the osd controls
39 typedef struct {
40 /* the offscreen representation of the OSD */
41 struct {
42 cairo_surface_t *surface;
43 gboolean rendered;
44 #ifdef OSD_GPS_BUTTON
45 gboolean gps_enabled;
46 #endif
47 } controls;
48
49 #ifdef OSD_BALLOON
50 //a balloon with additional info
51 struct {
52 cairo_surface_t *surface;
53 int orientation, offset_x, offset_y;
54
55 gboolean just_created;
56 float lat, lon;
57 OsmGpsMapRect_t rect;
58
59 /* function called to have the user app draw the contents */
60 OsmGpsMapBalloonCallback cb;
61 gpointer data;
62 } balloon;
63 #endif
64
65 #ifdef OSD_SCALE
66 struct {
67 cairo_surface_t *surface;
68 int zoom;
69 } scale;
70 #endif
71
72 #ifdef OSD_CROSSHAIR
73 struct {
74 cairo_surface_t *surface;
75 gboolean rendered;
76 } crosshair;
77 #endif
78
79 #ifdef OSD_COORDINATES
80 struct {
81 cairo_surface_t *surface;
82 float lat, lon;
83 } coordinates;
84 #endif
85
86 #ifdef OSD_SOURCE_SEL
87 struct {
88 /* values to handle the "source" menu */
89 cairo_surface_t *surface;
90 gboolean expanded;
91 gint shift, dir, count;
92 gint handler_id;
93 gint width, height;
94 gboolean rendered;
95 } source_sel;
96 #endif
97
98 } osd_priv_t;
99
100 #ifdef OSD_BALLOON
101 /* most visual effects are hardcoded by now, but may be made */
102 /* available via properties later */
103 #ifndef BALLOON_AREA_WIDTH
104 #define BALLOON_AREA_WIDTH 290
105 #endif
106 #ifndef BALLOON_AREA_HEIGHT
107 #define BALLOON_AREA_HEIGHT 75
108 #endif
109 #ifndef BALLOON_CORNER_RADIUS
110 #define BALLOON_CORNER_RADIUS 10
111 #endif
112
113 #define BALLOON_BORDER (BALLOON_CORNER_RADIUS/2)
114 #define BALLOON_WIDTH (BALLOON_AREA_WIDTH + 2 * BALLOON_BORDER)
115 #define BALLOON_HEIGHT (BALLOON_AREA_HEIGHT + 2 * BALLOON_BORDER)
116 #define BALLOON_TRANSPARENCY 0.8
117 #define POINTER_HEIGHT 20
118 #define POINTER_FOOT_WIDTH 20
119 #define POINTER_OFFSET (BALLOON_CORNER_RADIUS*3/4)
120 #define BALLOON_SHADOW (BALLOON_CORNER_RADIUS/2)
121 #define BALLOON_SHADOW_TRANSPARENCY 0.2
122
123 #define BALLOON_W (BALLOON_WIDTH + BALLOON_SHADOW)
124 #define BALLOON_H (BALLOON_HEIGHT + POINTER_HEIGHT + BALLOON_SHADOW)
125
126 #define CLOSE_BUTTON_RADIUS (BALLOON_CORNER_RADIUS)
127
128
129 /* draw the bubble shape. this is used twice, once for the shape and once */
130 /* for the shadow */
131 static void
132 osm_gps_map_draw_balloon_shape (cairo_t *cr, int x0, int y0, int x1, int y1,
133 gboolean bottom, int px, int py, int px0, int px1) {
134
135 cairo_move_to (cr, x0, y0 + BALLOON_CORNER_RADIUS);
136 cairo_arc (cr, x0 + BALLOON_CORNER_RADIUS, y0 + BALLOON_CORNER_RADIUS,
137 BALLOON_CORNER_RADIUS, -M_PI, -M_PI/2);
138 if(!bottom) {
139 /* insert top pointer */
140 cairo_line_to (cr, px1, y0);
141 cairo_line_to (cr, px, py);
142 cairo_line_to (cr, px0, y0);
143 }
144
145 cairo_line_to (cr, x1 - BALLOON_CORNER_RADIUS, y0);
146 cairo_arc (cr, x1 - BALLOON_CORNER_RADIUS, y0 + BALLOON_CORNER_RADIUS,
147 BALLOON_CORNER_RADIUS, -M_PI/2, 0);
148 cairo_line_to (cr, x1 , y1 - BALLOON_CORNER_RADIUS);
149 cairo_arc (cr, x1 - BALLOON_CORNER_RADIUS, y1 - BALLOON_CORNER_RADIUS,
150 BALLOON_CORNER_RADIUS, 0, M_PI/2);
151 if(bottom) {
152 /* insert bottom pointer */
153 cairo_line_to (cr, px0, y1);
154 cairo_line_to (cr, px, py);
155 cairo_line_to (cr, px1, y1);
156 }
157
158 cairo_line_to (cr, x0 + BALLOON_CORNER_RADIUS, y1);
159 cairo_arc (cr, x0 + BALLOON_CORNER_RADIUS, y1 - BALLOON_CORNER_RADIUS,
160 BALLOON_CORNER_RADIUS, M_PI/2, M_PI);
161
162 cairo_close_path (cr);
163 }
164
165 static void
166 osd_render_balloon(osm_gps_map_osd_t *osd) {
167 osd_priv_t *priv = (osd_priv_t*)osd->priv;
168
169 /* get zoom */
170 gint zoom;
171 g_object_get(OSM_GPS_MAP(osd->widget), "zoom", &zoom, NULL);
172
173 /* ------- convert given coordinate into screen position --------- */
174 gint xs, ys;
175 osm_gps_map_geographic_to_screen (OSM_GPS_MAP(osd->widget),
176 priv->balloon.lat, priv->balloon.lon,
177 &xs, &ys);
178
179 gint x0 = 1, y0 = 1;
180
181 /* check position of this relative to screen center to determine */
182 /* pointer direction ... */
183 int pointer_x, pointer_x0, pointer_x1;
184 int pointer_y;
185
186 /* ... and calculate position */
187 int orientation = 0;
188 if(xs > osd->widget->allocation.width/2) {
189 priv->balloon.offset_x = -BALLOON_WIDTH + POINTER_OFFSET;
190 pointer_x = x0 - priv->balloon.offset_x;
191 pointer_x0 = pointer_x - (BALLOON_CORNER_RADIUS - POINTER_OFFSET);
192 pointer_x1 = pointer_x0 - POINTER_FOOT_WIDTH;
193 orientation |= 1;
194 } else {
195 priv->balloon.offset_x = -POINTER_OFFSET;
196 pointer_x = x0 - priv->balloon.offset_x;
197 pointer_x1 = pointer_x + (BALLOON_CORNER_RADIUS - POINTER_OFFSET);
198 pointer_x0 = pointer_x1 + POINTER_FOOT_WIDTH;
199 }
200
201 gboolean bottom = FALSE;
202 if(ys > osd->widget->allocation.height/2) {
203 priv->balloon.offset_y = -BALLOON_HEIGHT - POINTER_HEIGHT;
204 pointer_y = y0 - priv->balloon.offset_y;
205 bottom = TRUE;
206 orientation |= 2;
207 } else {
208 priv->balloon.offset_y = 0;
209 pointer_y = y0 - priv->balloon.offset_y;
210 y0 += POINTER_HEIGHT;
211 }
212
213 /* if required orientation equals current one, then don't render */
214 /* anything */
215 if(orientation == priv->balloon.orientation)
216 return;
217
218 priv->balloon.orientation = orientation;
219
220 /* calculate bottom/right of box */
221 int x1 = x0 + BALLOON_WIDTH, y1 = y0 + BALLOON_HEIGHT;
222
223 /* save balloon screen coordinates for later use */
224 priv->balloon.rect.x = x0 + BALLOON_BORDER;
225 priv->balloon.rect.y = y0 + BALLOON_BORDER;
226 priv->balloon.rect.w = x1 - x0 - 2*BALLOON_BORDER;
227 priv->balloon.rect.h = y1 - y0 - 2*BALLOON_BORDER;
228
229 cairo_t *cr = cairo_create(priv->balloon.surface);
230 cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
231 cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0);
232 cairo_paint(cr);
233 cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
234
235 /* --------- draw shadow --------------- */
236 osm_gps_map_draw_balloon_shape (cr,
237 x0 + BALLOON_SHADOW, y0 + BALLOON_SHADOW,
238 x1 + BALLOON_SHADOW, y1 + BALLOON_SHADOW,
239 bottom, pointer_x, pointer_y,
240 pointer_x0 + BALLOON_SHADOW, pointer_x1 + BALLOON_SHADOW);
241
242 cairo_set_source_rgba (cr, 0, 0, 0, BALLOON_SHADOW_TRANSPARENCY);
243 cairo_fill_preserve (cr);
244 cairo_set_source_rgba (cr, 1, 0, 0, 1.0);
245 cairo_set_line_width (cr, 0);
246 cairo_stroke (cr);
247
248 /* --------- draw main shape ----------- */
249 osm_gps_map_draw_balloon_shape (cr, x0, y0, x1, y1,
250 bottom, pointer_x, pointer_y, pointer_x0, pointer_x1);
251
252 cairo_set_source_rgba (cr, 1, 1, 1, BALLOON_TRANSPARENCY);
253 cairo_fill_preserve (cr);
254 cairo_set_source_rgba (cr, 0, 0, 0, BALLOON_TRANSPARENCY);
255 cairo_set_line_width (cr, 1);
256 cairo_stroke (cr);
257
258 if (priv->balloon.cb) {
259 /* clip in case application tries to draw in */
260 /* exceed of the balloon */
261 cairo_rectangle (cr, priv->balloon.rect.x, priv->balloon.rect.y,
262 priv->balloon.rect.w, priv->balloon.rect.h);
263 cairo_clip (cr);
264 cairo_new_path (cr); /* current path is not
265 consumed by cairo_clip() */
266
267 priv->balloon.cb(cr, &priv->balloon.rect, priv->balloon.data);
268 }
269
270 cairo_destroy(cr);
271 }
272
273 /* return true if balloon is being displayed and if */
274 /* the given coordinate is within this balloon */
275 static gboolean
276 osd_balloon_check(osm_gps_map_osd_t *osd, gboolean down, gint x, gint y)
277 {
278 osd_priv_t *priv = (osd_priv_t*)osd->priv;
279
280 if(!priv->balloon.surface)
281 return FALSE;
282
283 gint xs, ys;
284 osm_gps_map_geographic_to_screen (OSM_GPS_MAP(osd->widget),
285 priv->balloon.lat, priv->balloon.lon,
286 &xs, &ys);
287
288 xs += priv->balloon.rect.x + priv->balloon.offset_x;
289 ys += priv->balloon.rect.y + priv->balloon.offset_y;
290
291 /* handle the fact that the balloon may have been created by the */
292 /* button down event */
293
294 gboolean is_in =
295 (x > xs) && (x < xs + priv->balloon.rect.w) &&
296 (y > ys) && (y < ys + priv->balloon.rect.h);
297
298 if(!is_in && !down && !priv->balloon.just_created) {
299 /* the user actually clicked outside the balloon */
300
301 /* close the balloon! */
302 osm_gps_map_osd_clear_balloon (OSM_GPS_MAP(osd->widget));
303 }
304
305 return is_in;
306 }
307
308 void osm_gps_map_osd_clear_balloon (OsmGpsMap *map) {
309 g_return_if_fail (OSM_IS_GPS_MAP (map));
310
311 osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
312 g_return_if_fail (osd);
313
314 osd_priv_t *priv = (osd_priv_t*)osd->priv;
315 g_return_if_fail (priv);
316
317 if(priv->balloon.surface) {
318 cairo_surface_destroy(priv->balloon.surface);
319 priv->balloon.surface = NULL;
320 priv->balloon.lat = OSM_GPS_MAP_INVALID;
321 priv->balloon.lon = OSM_GPS_MAP_INVALID;
322 }
323 osm_gps_map_redraw(map);
324 }
325
326 void
327 osm_gps_map_osd_draw_balloon (OsmGpsMap *map, float latitude, float longitude,
328 OsmGpsMapBalloonCallback cb, gpointer data) {
329 g_return_if_fail (OSM_IS_GPS_MAP (map));
330
331 osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
332 g_return_if_fail (osd);
333
334 osd_priv_t *priv = (osd_priv_t*)osd->priv;
335 g_return_if_fail (priv);
336
337 osm_gps_map_osd_clear_balloon (map);
338
339 /* allocate balloon surface */
340 priv->balloon.surface =
341 cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
342 BALLOON_W+2, BALLOON_H+2);
343
344 priv->balloon.lat = latitude;
345 priv->balloon.lon = longitude;
346 priv->balloon.cb = cb;
347 priv->balloon.data = data;
348 priv->balloon.just_created = TRUE;
349
350 priv->balloon.orientation = -1;
351
352 osd_render_balloon(osd);
353
354 osm_gps_map_redraw(map);
355 }
356
357 #endif // OSD_BALLOON
358
359 /* position and extent of bounding box */
360 #ifndef OSD_X
361 #define OSD_X (10)
362 #endif
363
364 #ifndef OSD_Y
365 #define OSD_Y (10)
366 #endif
367
368 /* parameters of the direction shape */
369 #ifndef OSD_DIAMETER
370 #define D_RAD (30) // diameter of dpad
371 #else
372 #define D_RAD (OSD_DIAMETER)
373 #endif
374 #define D_TIP (4*D_RAD/5) // distance of arrow tip from dpad center
375 #define D_LEN (D_RAD/4) // length of arrow
376 #define D_WID (D_LEN) // width of arrow
377
378 /* parameters of the "zoom" pad */
379 #define Z_STEP (D_RAD/4) // distance between dpad and zoom
380 #define Z_RAD (D_RAD/2) // radius of "caps" of zoom bar
381
382 #ifdef OSD_SHADOW_ENABLE
383 /* shadow also depends on control size */
384 #define OSD_SHADOW (D_RAD/6)
385 #else
386 #define OSD_SHADOW (0)
387 #endif
388
389 /* normally the GPS button is in the center of the dpad. if there's */
390 /* no dpad it will go into the zoom area */
391 #if defined(OSD_GPS_BUTTON) && defined(OSD_NO_DPAD)
392 #define Z_GPS 1
393 #else
394 #define Z_GPS 0
395 #endif
396
397 /* total width and height of controls incl. shadow */
398 #define OSD_W (2*D_RAD + OSD_SHADOW + Z_GPS * 2 * Z_RAD)
399 #if !Z_GPS
400 #define OSD_H (2*D_RAD + Z_STEP + 2*Z_RAD + OSD_SHADOW)
401 #else
402 #define OSD_H (2*Z_RAD + OSD_SHADOW)
403 #endif
404
405 #ifdef OSD_SHADOW_ENABLE
406 #define OSD_LBL_SHADOW (OSD_SHADOW/2)
407 #endif
408
409 #define Z_TOP ((1-Z_GPS) * (2 * D_RAD + Z_STEP))
410
411 #define Z_MID (Z_TOP + Z_RAD)
412 #define Z_BOT (Z_MID + Z_RAD)
413 #define Z_LEFT (Z_RAD)
414 #define Z_RIGHT (2 * D_RAD - Z_RAD + Z_GPS * 2 * Z_RAD)
415 #define Z_CENTER ((Z_RIGHT + Z_LEFT)/2)
416
417 /* create the cairo shape used for the zoom buttons */
418 static void
419 osd_zoom_shape(cairo_t *cr, gint x, gint y)
420 {
421 cairo_move_to (cr, x+Z_LEFT, y+Z_TOP);
422 cairo_line_to (cr, x+Z_RIGHT, y+Z_TOP);
423 cairo_arc (cr, x+Z_RIGHT, y+Z_MID, Z_RAD, -M_PI/2, M_PI/2);
424 cairo_line_to (cr, x+Z_LEFT, y+Z_BOT);
425 cairo_arc (cr, x+Z_LEFT, y+Z_MID, Z_RAD, M_PI/2, -M_PI/2);
426 }
427
428 /* ------------------- color/shadow functions ----------------- */
429
430 #ifndef OSD_COLOR
431 /* if no color has been specified we just use the gdks default colors */
432 static void
433 osd_labels(cairo_t *cr, gint width, gboolean enabled,
434 GdkColor *fg, GdkColor *disabled) {
435 if(enabled) gdk_cairo_set_source_color(cr, fg);
436 else gdk_cairo_set_source_color(cr, disabled);
437 cairo_set_line_width (cr, width);
438 }
439 #else
440 static void
441 osd_labels(cairo_t *cr, gint width, gboolean enabled) {
442 if(enabled) cairo_set_source_rgb (cr, OSD_COLOR);
443 else cairo_set_source_rgb (cr, OSD_COLOR_DISABLED);
444 cairo_set_line_width (cr, width);
445 }
446 #endif
447
448 #ifdef OSD_SHADOW_ENABLE
449 static void
450 osd_labels_shadow(cairo_t *cr, gint width, gboolean enabled) {
451 cairo_set_source_rgba (cr, 0, 0, 0, enabled?0.3:0.15);
452 cairo_set_line_width (cr, width);
453 }
454 #endif
455
456 #ifndef OSD_NO_DPAD
457 /* create the cairo shape used for the dpad */
458 static void
459 osd_dpad_shape(cairo_t *cr, gint x, gint y)
460 {
461 cairo_arc (cr, x+D_RAD, y+D_RAD, D_RAD, 0, 2 * M_PI);
462 }
463 #endif
464
465 #ifdef OSD_SHADOW_ENABLE
466 static void
467 osd_shape_shadow(cairo_t *cr) {
468 cairo_set_source_rgba (cr, 0, 0, 0, 0.2);
469 cairo_fill (cr);
470 cairo_stroke (cr);
471 }
472 #endif
473
474 #ifndef OSD_COLOR
475 /* if no color has been specified we just use the gdks default colors */
476 static void
477 osd_shape(cairo_t *cr, GdkColor *bg, GdkColor *fg) {
478 gdk_cairo_set_source_color(cr, bg);
479 cairo_fill_preserve (cr);
480 gdk_cairo_set_source_color(cr, fg);
481 cairo_set_line_width (cr, 1);
482 cairo_stroke (cr);
483 }
484 #else
485 static void
486 osd_shape(cairo_t *cr) {
487 cairo_set_source_rgb (cr, OSD_COLOR_BG);
488 cairo_fill_preserve (cr);
489 cairo_set_source_rgb (cr, OSD_COLOR);
490 cairo_set_line_width (cr, 1);
491 cairo_stroke (cr);
492 }
493 #endif
494
495
496 static gboolean
497 osm_gps_map_in_circle(gint x, gint y, gint cx, gint cy, gint rad)
498 {
499 return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad);
500 }
501
502 #ifndef OSD_NO_DPAD
503 /* check whether x/y is within the dpad */
504 static osd_button_t
505 osd_check_dpad(gint x, gint y)
506 {
507 /* within entire dpad circle */
508 if( osm_gps_map_in_circle(x, y, D_RAD, D_RAD, D_RAD))
509 {
510 /* convert into position relative to dpads centre */
511 x -= D_RAD;
512 y -= D_RAD;
513
514 #ifdef OSD_GPS_BUTTON
515 /* check for dpad center goes here! */
516 if( osm_gps_map_in_circle(x, y, 0, 0, D_RAD/3))
517 return OSD_GPS;
518 #endif
519
520 if( y < 0 && abs(x) < abs(y))
521 return OSD_UP;
522
523 if( y > 0 && abs(x) < abs(y))
524 return OSD_DOWN;
525
526 if( x < 0 && abs(y) < abs(x))
527 return OSD_LEFT;
528
529 if( x > 0 && abs(y) < abs(x))
530 return OSD_RIGHT;
531
532 return OSD_BG;
533 }
534 return OSD_NONE;
535 }
536 #endif
537
538 /* check whether x/y is within the zoom pads */
539 static osd_button_t
540 osd_check_zoom(gint x, gint y) {
541 if( x > 0 && x < OSD_W && y > Z_TOP && y < Z_BOT) {
542
543 /* within circle around (-) label */
544 if( osm_gps_map_in_circle(x, y, Z_LEFT, Z_MID, Z_RAD))
545 return OSD_OUT;
546
547 /* within circle around (+) label */
548 if( osm_gps_map_in_circle(x, y, Z_RIGHT, Z_MID, Z_RAD))
549 return OSD_IN;
550
551 #if Z_GPS == 1
552 /* within square around center */
553 if( x > Z_CENTER - Z_RAD && x < Z_CENTER + Z_RAD)
554 return OSD_GPS;
555 #endif
556
557 /* between center of (-) button and center of entire zoom control area */
558 if(x > OSD_LEFT && x < D_RAD)
559 return OSD_OUT;
560
561 /* between center of (+) button and center of entire zoom control area */
562 if(x < OSD_RIGHT && x > D_RAD)
563 return OSD_IN;
564 }
565
566 return OSD_NONE;
567 }
568
569 #ifdef OSD_SOURCE_SEL
570
571 /* place source selection at right border */
572 #define OSD_S_RAD (Z_RAD)
573 #define OSD_S_X (-OSD_X)
574 #define OSD_S_Y (OSD_Y)
575 #define OSD_S_PW (2 * Z_RAD)
576 #define OSD_S_W (OSD_S_PW)
577 #define OSD_S_PH (2 * Z_RAD)
578 #define OSD_S_H (OSD_S_PH + OSD_SHADOW)
579
580 /* size of usable area when expanded */
581 #define OSD_S_AREA_W (priv->source_sel.width)
582 #define OSD_S_AREA_H (priv->source_sel.height)
583 #define OSD_S_EXP_W (OSD_S_PW + OSD_S_AREA_W + OSD_SHADOW)
584 #define OSD_S_EXP_H (OSD_S_AREA_H + OSD_SHADOW)
585
586 /* internal value to draw the arrow on the "puller" */
587 #define OSD_S_D0 (OSD_S_RAD/2)
588 #ifndef OSD_FONT_SIZE
589 #define OSD_FONT_SIZE 16.0
590 #endif
591 #define OSD_TEXT_BORDER (OSD_FONT_SIZE/2)
592 #define OSD_TEXT_SKIP (OSD_FONT_SIZE/8)
593
594 /* draw the shape of the source selection OSD, either only the puller (not expanded) */
595 /* or the entire menu incl. the puller (expanded) */
596 static void
597 osd_source_shape(osd_priv_t *priv, cairo_t *cr, gint x, gint y) {
598 if(!priv->source_sel.expanded) {
599 /* just draw the puller */
600 cairo_move_to (cr, x + OSD_S_PW, y + OSD_S_PH);
601 cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
602 cairo_line_to (cr, x + OSD_S_PW, y);
603 } else {
604 /* draw the puller and the area itself */
605 cairo_move_to (cr, x + OSD_S_PW + OSD_S_AREA_W, y + OSD_S_AREA_H);
606 cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_AREA_H);
607 if(OSD_S_Y > 0) {
608 cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_PH);
609 cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
610 } else {
611 cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_AREA_H-OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
612 cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_AREA_H - OSD_S_PH);
613 cairo_line_to (cr, x + OSD_S_PW, y);
614 }
615 cairo_line_to (cr, x + OSD_S_PW + OSD_S_AREA_W, y);
616 cairo_close_path (cr);
617 }
618 }
619
620 static void
621 osd_source_content(osm_gps_map_osd_t *osd, cairo_t *cr, gint offset) {
622 osd_priv_t *priv = (osd_priv_t*)osd->priv;
623
624 int py = offset + OSD_S_RAD - OSD_S_D0;
625
626 if(!priv->source_sel.expanded) {
627 /* draw the "puller" open (<) arrow */
628 cairo_move_to (cr, offset + OSD_S_RAD + OSD_S_D0/2, py);
629 cairo_rel_line_to (cr, -OSD_S_D0, +OSD_S_D0);
630 cairo_rel_line_to (cr, +OSD_S_D0, +OSD_S_D0);
631 } else {
632 if(OSD_S_Y < 0)
633 py += OSD_S_AREA_H - OSD_S_PH;
634
635 /* draw the "puller" close (>) arrow */
636 cairo_move_to (cr, offset + OSD_S_RAD - OSD_S_D0/2, py);
637 cairo_rel_line_to (cr, +OSD_S_D0, +OSD_S_D0);
638 cairo_rel_line_to (cr, -OSD_S_D0, +OSD_S_D0);
639 cairo_stroke(cr);
640
641 /* don't draw a shadow for the text content */
642 if(offset == 1) {
643 gint source;
644 g_object_get(osd->widget, "map-source", &source, NULL);
645
646 cairo_select_font_face (cr, "Sans",
647 CAIRO_FONT_SLANT_NORMAL,
648 CAIRO_FONT_WEIGHT_BOLD);
649 cairo_set_font_size (cr, OSD_FONT_SIZE);
650
651 int i, step = (priv->source_sel.height - 2*OSD_TEXT_BORDER) /
652 OSM_GPS_MAP_SOURCE_LAST;
653 for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) {
654 cairo_text_extents_t extents;
655 const char *src = osm_gps_map_source_get_friendly_name(i);
656 cairo_text_extents (cr, src, &extents);
657
658 int x = offset + OSD_S_PW + OSD_TEXT_BORDER;
659 int y = offset + step * (i-1) + OSD_TEXT_BORDER;
660
661 /* draw filled rectangle if selected */
662 if(source == i) {
663 cairo_rectangle(cr, x - OSD_TEXT_BORDER/2,
664 y - OSD_TEXT_SKIP,
665 priv->source_sel.width - OSD_TEXT_BORDER,
666 step + OSD_TEXT_SKIP);
667 cairo_fill(cr);
668
669 /* temprarily draw with background color */
670 #ifndef OSD_COLOR
671 GdkColor bg = osd->widget->style->bg[GTK_STATE_NORMAL];
672 gdk_cairo_set_source_color(cr, &bg);
673 #else
674 cairo_set_source_rgb (cr, OSD_COLOR_BG);
675 #endif
676 }
677
678 cairo_move_to (cr, x, y + OSD_TEXT_SKIP - extents.y_bearing);
679 cairo_show_text (cr, src);
680
681 /* restore color */
682 if(source == i) {
683 #ifndef OSD_COLOR
684 GdkColor fg = osd->widget->style->fg[GTK_STATE_NORMAL];
685 gdk_cairo_set_source_color(cr, &fg);
686 #else
687 cairo_set_source_rgb (cr, OSD_COLOR);
688 #endif
689 }
690 }
691 }
692 }
693 }
694
695 static void
696 osd_render_source_sel(osm_gps_map_osd_t *osd, gboolean force_rerender) {
697 osd_priv_t *priv = (osd_priv_t*)osd->priv;
698
699 if(priv->source_sel.rendered && !force_rerender)
700 return;
701
702 priv->source_sel.rendered = TRUE;
703
704 #ifndef OSD_COLOR
705 GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL];
706 GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL];
707 GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE];
708 #endif
709
710 /* draw source selector */
711 cairo_t *cr = cairo_create(priv->source_sel.surface);
712 cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
713 cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
714 cairo_paint(cr);
715 cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
716
717 #ifdef OSD_SHADOW_ENABLE
718 osd_source_shape(priv, cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
719 osd_shape_shadow(cr);
720 #endif
721
722 osd_source_shape(priv, cr, 1, 1);
723 #ifndef OSD_COLOR
724 osd_shape(cr, &bg, &fg);
725 #else
726 osd_shape(cr);
727 #endif
728
729 #ifdef OSD_SHADOW_ENABLE
730 osd_labels_shadow(cr, Z_RAD/3, TRUE);
731 osd_source_content(osd, cr, 1+OSD_LBL_SHADOW);
732 cairo_stroke (cr);
733 #endif
734 #ifndef OSD_COLOR
735 osd_labels(cr, Z_RAD/3, TRUE, &fg, &da);
736 #else
737 osd_labels(cr, Z_RAD/3, TRUE);
738 #endif
739 osd_source_content(osd, cr, 1);
740 cairo_stroke (cr);
741
742 cairo_destroy(cr);
743 }
744
745 /* re-allocate the buffer used to draw the menu. This is used */
746 /* to collapse/expand the buffer */
747 static void
748 osd_source_reallocate(osm_gps_map_osd_t *osd) {
749 osd_priv_t *priv = (osd_priv_t*)osd->priv;
750
751 /* re-allocate offscreen bitmap */
752 g_assert (priv->source_sel.surface);
753
754 int w = OSD_S_W, h = OSD_S_H;
755 if(priv->source_sel.expanded) {
756 cairo_text_extents_t extents;
757
758 /* determine content size */
759 cairo_t *cr = cairo_create(priv->source_sel.surface);
760 cairo_select_font_face (cr, "Sans",
761 CAIRO_FONT_SLANT_NORMAL,
762 CAIRO_FONT_WEIGHT_BOLD);
763 cairo_set_font_size (cr, OSD_FONT_SIZE);
764
765 /* calculate menu size */
766 int i, max_h = 0, max_w = 0;
767 for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) {
768 const char *src = osm_gps_map_source_get_friendly_name(i);
769 cairo_text_extents (cr, src, &extents);
770
771 if(extents.width > max_w) max_w = extents.width;
772 if(extents.height > max_h) max_h = extents.height;
773 }
774 cairo_destroy(cr);
775
776 priv->source_sel.width = max_w + 2*OSD_TEXT_BORDER;
777 priv->source_sel.height = OSM_GPS_MAP_SOURCE_LAST *
778 (max_h + 2*OSD_TEXT_SKIP) + 2*OSD_TEXT_BORDER;
779
780 w = OSD_S_EXP_W;
781 h = OSD_S_EXP_H;
782 }
783
784 cairo_surface_destroy(priv->source_sel.surface);
785 priv->source_sel.surface =
786 cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w+2, h+2);
787
788 osd_render_source_sel(osd, TRUE);
789 }
790
791 #define OSD_HZ 15
792 #define OSD_TIME 500
793
794 static gboolean osd_source_animate(gpointer data) {
795 osm_gps_map_osd_t *osd = (osm_gps_map_osd_t*)data;
796 osd_priv_t *priv = (osd_priv_t*)osd->priv;
797 int diff = OSD_S_EXP_W - OSD_S_W - OSD_S_X;
798 gboolean done = FALSE;
799 priv->source_sel.count += priv->source_sel.dir;
800
801 /* shifting in */
802 if(priv->source_sel.dir < 0) {
803 if(priv->source_sel.count <= 0) {
804 priv->source_sel.count = 0;
805 done = TRUE;
806 }
807 } else {
808 if(priv->source_sel.count >= 1000) {
809 priv->source_sel.expanded = FALSE;
810 osd_source_reallocate(osd);
811
812 priv->source_sel.count = 1000;
813 done = TRUE;
814 }
815 }
816
817
818 /* count runs linearly from 0 to 1000, map this nicely onto a position */
819
820 /* nice sinoid mapping */
821 float m = 0.5-cos(priv->source_sel.count * M_PI / 1000.0)/2;
822 priv->source_sel.shift =
823 (osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X) +
824 m * diff;
825
826 /* make sure the screen is updated */
827 osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
828
829 /* stop animation if done */
830 if(done)
831 priv->source_sel.handler_id = 0;
832
833 return !done;
834 }
835
836 /* switch between expand and collapse mode of source selection */
837 static void
838 osd_source_toggle(osm_gps_map_osd_t *osd)
839 {
840 osd_priv_t *priv = (osd_priv_t*)osd->priv;
841
842 /* ignore clicks while animation is running */
843 if(priv->source_sel.handler_id)
844 return;
845
846 /* expand immediately, collapse is handle at the end of the */
847 /* collapse animation */
848 if(!priv->source_sel.expanded) {
849 priv->source_sel.expanded = TRUE;
850 osd_source_reallocate(osd);
851
852 priv->source_sel.count = 1000;
853 priv->source_sel.shift = osd->widget->allocation.width - OSD_S_W;
854 priv->source_sel.dir = -1000/OSD_HZ;
855 } else {
856 priv->source_sel.count = 0;
857 priv->source_sel.shift = osd->widget->allocation.width -
858 OSD_S_EXP_W + OSD_S_X;
859 priv->source_sel.dir = +1000/OSD_HZ;
860 }
861
862 /* start timer to handle animation */
863 priv->source_sel.handler_id = gtk_timeout_add(OSD_TIME/OSD_HZ,
864 osd_source_animate, osd);
865 }
866
867 /* check if the user clicked inside the source selection area */
868 static osd_button_t
869 osd_source_check(osm_gps_map_osd_t *osd, gboolean down, gint x, gint y) {
870 osd_priv_t *priv = (osd_priv_t*)osd->priv;
871
872 if(!priv->source_sel.expanded)
873 x -= osd->widget->allocation.width - OSD_S_W;
874 else
875 x -= osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
876
877 if(OSD_S_Y > 0)
878 y -= OSD_S_Y;
879 else
880 y -= osd->widget->allocation.height - OSD_S_PH + OSD_S_Y;
881
882 /* within square around puller? */
883 if(y > 0 && y < OSD_S_PH && x > 0 && x < OSD_S_PW) {
884 /* really within puller shape? */
885 if(x > Z_RAD || osm_gps_map_in_circle(x, y, Z_RAD, Z_RAD, Z_RAD)) {
886 /* expand source selector */
887 if(down)
888 osd_source_toggle(osd);
889
890 /* tell upper layers that user clicked some background element */
891 /* of the OSD */
892 return OSD_BG;
893 }
894 }
895
896 /* check for clicks into data area */
897 if(priv->source_sel.expanded && !priv->source_sel.handler_id) {
898 /* re-adjust from puller top to content top */
899 if(OSD_S_Y < 0)
900 y += OSD_S_EXP_H - OSD_S_PH;
901
902 if(x > OSD_S_PW &&
903 x < OSD_S_PW + OSD_S_EXP_W &&
904 y > 0 &&
905 y < OSD_S_EXP_H) {
906
907 int step = (priv->source_sel.height - 2*OSD_TEXT_BORDER)
908 / OSM_GPS_MAP_SOURCE_LAST;
909
910 y -= OSD_TEXT_BORDER - OSD_TEXT_SKIP;
911 y /= step;
912 y += 1;
913
914 if(down) {
915 gint old = 0;
916 g_object_get(osd->widget, "map-source", &old, NULL);
917
918 if(y > OSM_GPS_MAP_SOURCE_NULL &&
919 y <= OSM_GPS_MAP_SOURCE_LAST &&
920 old != y) {
921 g_object_set(osd->widget, "map-source", y, NULL);
922
923 osd_render_source_sel(osd, TRUE);
924 osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
925 }
926 }
927
928 /* return "clicked in OSD background" to prevent further */
929 /* processing by application */
930 return OSD_BG;
931 }
932 }
933
934 return OSD_NONE;
935 }
936 #endif // OSD_SOURCE_SEL
937
938 static osd_button_t
939 osd_check(osm_gps_map_osd_t *osd, gboolean down, gint x, gint y) {
940 osd_button_t but = OSD_NONE;
941
942 #ifdef OSD_BALLOON
943 if(down) {
944 /* needed to handle balloons that are created at click */
945 osd_priv_t *priv = (osd_priv_t*)osd->priv;
946 priv->balloon.just_created = FALSE;
947 }
948 #endif
949
950 #ifdef OSD_SOURCE_SEL
951 /* the source selection area is handles internally */
952 but = osd_source_check(osd, down, x, y);
953 #endif
954
955 if(but == OSD_NONE) {
956 x -= OSD_X;
957 y -= OSD_Y;
958
959 if(OSD_X < 0)
960 x -= (osd->widget->allocation.width - OSD_W);
961
962 if(OSD_Y < 0)
963 y -= (osd->widget->allocation.height - OSD_H);
964
965 /* first do a rough test for the OSD area. */
966 /* this is just to avoid an unnecessary detailed test */
967 if(x > 0 && x < OSD_W && y > 0 && y < OSD_H) {
968 #ifndef OSD_NO_DPAD
969 but = osd_check_dpad(x, y);
970 #endif
971 }
972
973 if(but == OSD_NONE)
974 but = osd_check_zoom(x, y);
975 }
976
977 #ifdef OSD_BALLOON
978 if(but == OSD_NONE) {
979 /* check if user clicked into balloon */
980 if(osd_balloon_check(osd, down, x, y))
981 but = OSD_BG;
982 }
983 #endif
984
985 return but;
986 }
987
988 #ifndef OSD_NO_DPAD
989 static void
990 osd_dpad_labels(cairo_t *cr, gint x, gint y) {
991 /* move reference to dpad center */
992 x += D_RAD;
993 y += D_RAD;
994
995 const static gint offset[][3][2] = {
996 /* left arrow/triangle */
997 { { -D_TIP+D_LEN, -D_WID }, { -D_LEN, D_WID }, { +D_LEN, D_WID } },
998 /* right arrow/triangle */
999 { { +D_TIP-D_LEN, -D_WID }, { +D_LEN, D_WID }, { -D_LEN, D_WID } },
1000 /* top arrow/triangle */
1001 { { -D_WID, -D_TIP+D_LEN }, { D_WID, -D_LEN }, { D_WID, +D_LEN } },
1002 /* bottom arrow/triangle */
1003 { { -D_WID, +D_TIP-D_LEN }, { D_WID, +D_LEN }, { D_WID, -D_LEN } }
1004 };
1005
1006 int i;
1007 for(i=0;i<4;i++) {
1008 cairo_move_to (cr, x + offset[i][0][0], y + offset[i][0][1]);
1009 cairo_rel_line_to (cr, offset[i][1][0], offset[i][1][1]);
1010 cairo_rel_line_to (cr, offset[i][2][0], offset[i][2][1]);
1011 }
1012 }
1013 #endif
1014
1015 #ifdef OSD_GPS_BUTTON
1016 /* draw the satellite dish icon in the center of the dpad */
1017 #define GPS_V0 (D_RAD/7)
1018 #define GPS_V1 (D_RAD/10)
1019 #define GPS_V2 (D_RAD/5)
1020
1021 /* draw a satellite receiver dish */
1022 /* this is either drawn in the center of the dpad (if present) */
1023 /* or in the middle of the zoom area */
1024 static void
1025 osd_dpad_gps(cairo_t *cr, gint x, gint y) {
1026 /* move reference to dpad center */
1027 x += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD * 3;
1028 y += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD + GPS_V0;
1029
1030 cairo_move_to (cr, x-GPS_V0, y+GPS_V0);
1031 cairo_rel_line_to (cr, +GPS_V0, -GPS_V0);
1032 cairo_rel_line_to (cr, +GPS_V0, +GPS_V0);
1033 cairo_close_path (cr);
1034
1035 cairo_move_to (cr, x+GPS_V1-GPS_V2, y-2*GPS_V2);
1036 cairo_curve_to (cr, x-GPS_V2, y, x+GPS_V1, y+GPS_V1, x+GPS_V1+GPS_V2, y);
1037 cairo_close_path (cr);
1038
1039 x += GPS_V1;
1040 cairo_move_to (cr, x, y-GPS_V2);
1041 cairo_rel_line_to (cr, +GPS_V1, -GPS_V1);
1042 }
1043 #endif
1044
1045 #define Z_LEN (2*Z_RAD/3)
1046
1047 static void
1048 osd_zoom_labels(cairo_t *cr, gint x, gint y) {
1049 cairo_move_to (cr, x + Z_LEFT - Z_LEN, y + Z_MID);
1050 cairo_line_to (cr, x + Z_LEFT + Z_LEN, y + Z_MID);
1051
1052 cairo_move_to (cr, x + Z_RIGHT, y + Z_MID - Z_LEN);
1053 cairo_line_to (cr, x + Z_RIGHT, y + Z_MID + Z_LEN);
1054 cairo_move_to (cr, x + Z_RIGHT - Z_LEN, y + Z_MID);
1055 cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);
1056 }
1057
1058 #ifdef OSD_COORDINATES
1059
1060 #ifndef OSD_COORDINATES_FONT_SIZE
1061 #define OSD_COORDINATES_FONT_SIZE 12
1062 #endif
1063
1064 #define OSD_COORDINATES_OFFSET (OSD_COORDINATES_FONT_SIZE/6)
1065
1066 #define OSD_COORDINATES_W (8*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET)
1067 #define OSD_COORDINATES_H (2*OSD_COORDINATES_FONT_SIZE+OSD_COORDINATES_OFFSET)
1068
1069 /* these can be overwritten with versions that support */
1070 /* localization */
1071 #ifndef OSD_COORDINATES_CHR_N
1072 #define OSD_COORDINATES_CHR_N "N"
1073 #endif
1074 #ifndef OSD_COORDINATES_CHR_S
1075 #define OSD_COORDINATES_CHR_S "S"
1076 #endif
1077 #ifndef OSD_COORDINATES_CHR_E
1078 #define OSD_COORDINATES_CHR_E "E"
1079 #endif
1080 #ifndef OSD_COORDINATES_CHR_W
1081 #define OSD_COORDINATES_CHR_W "W"
1082 #endif
1083
1084
1085
1086 /* this is the classic geocaching notation */
1087 static char
1088 *osd_latitude_str(float latitude) {
1089 char *c = OSD_COORDINATES_CHR_N;
1090 float integral, fractional;
1091
1092 if(isnan(latitude))
1093 return NULL;
1094
1095 if(latitude < 0) {
1096 latitude = fabs(latitude);
1097 c = OSD_COORDINATES_CHR_S;
1098 }
1099
1100 fractional = modff(latitude, &integral);
1101
1102 return g_strdup_printf("%s %02d° %06.3f'",
1103 c, (int)integral, fractional*60.0);
1104 }
1105
1106 static char
1107 *osd_longitude_str(float longitude) {
1108 char *c = OSD_COORDINATES_CHR_E;
1109 float integral, fractional;
1110
1111 if(isnan(longitude))
1112 return NULL;
1113
1114 if(longitude < 0) {
1115 longitude = fabs(longitude);
1116 c = OSD_COORDINATES_CHR_W;
1117 }
1118
1119 fractional = modff(longitude, &integral);
1120
1121 return g_strdup_printf("%s %03d° %06.3f'",
1122 c, (int)integral, fractional*60.0);
1123 }
1124
1125 static void
1126 osd_render_coordinates(osm_gps_map_osd_t *osd)
1127 {
1128 osd_priv_t *priv = (osd_priv_t*)osd->priv;
1129
1130 /* get current map position */
1131 gfloat lat, lon;
1132 g_object_get(osd->widget, "latitude", &lat, "longitude", &lon, NULL);
1133
1134 /* check if position has changed enough to require redraw */
1135 if(!isnan(priv->coordinates.lat) && !isnan(priv->coordinates.lon))
1136 /* 1/60000 == 1/1000 minute */
1137 if((fabsf(lat - priv->coordinates.lat) < 1/60000) &&
1138 (fabsf(lon - priv->coordinates.lon) < 1/60000))
1139 return;
1140
1141 priv->coordinates.lat = lat;
1142 priv->coordinates.lon = lon;
1143
1144 /* first fill with transparency */
1145 cairo_t *cr = cairo_create(priv->coordinates.surface);
1146 cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1147 // cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 0.5);
1148 cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0);
1149 cairo_paint(cr);
1150 cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1151
1152 cairo_select_font_face (cr, "Sans",
1153 CAIRO_FONT_SLANT_NORMAL,
1154 CAIRO_FONT_WEIGHT_BOLD);
1155 cairo_set_font_size (cr, OSD_COORDINATES_FONT_SIZE);
1156
1157 char *latitude = osd_latitude_str(lat);
1158 char *longitude = osd_longitude_str(lon);
1159
1160 cairo_text_extents_t lat_extents, lon_extents;
1161 cairo_text_extents (cr, latitude, &lat_extents);
1162 cairo_text_extents (cr, longitude, &lon_extents);
1163
1164 cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
1165 cairo_set_line_width (cr, OSD_COORDINATES_FONT_SIZE/6);
1166 cairo_move_to (cr,
1167 (OSD_COORDINATES_W - lat_extents.width)/2,
1168 OSD_COORDINATES_OFFSET - lat_extents.y_bearing);
1169 cairo_text_path (cr, latitude);
1170 cairo_move_to (cr,
1171 (OSD_COORDINATES_W - lon_extents.width)/2,
1172 OSD_COORDINATES_OFFSET - lon_extents.y_bearing +
1173 OSD_COORDINATES_FONT_SIZE);
1174 cairo_text_path (cr, longitude);
1175 cairo_stroke (cr);
1176
1177 cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
1178 cairo_move_to (cr,
1179 (OSD_COORDINATES_W - lat_extents.width)/2,
1180 OSD_COORDINATES_OFFSET - lat_extents.y_bearing);
1181 cairo_show_text (cr, latitude);
1182 cairo_move_to (cr,
1183 (OSD_COORDINATES_W - lon_extents.width)/2,
1184 OSD_COORDINATES_OFFSET - lon_extents.y_bearing +
1185 OSD_COORDINATES_FONT_SIZE);
1186 cairo_show_text (cr, longitude);
1187
1188 g_free(latitude);
1189 g_free(longitude);
1190
1191 cairo_destroy(cr);
1192 }
1193 #endif // OSD_COORDINATES
1194
1195 #ifdef OSD_CROSSHAIR
1196
1197 #ifndef OSD_CROSSHAIR_RADIUS
1198 #define OSD_CROSSHAIR_RADIUS 10
1199 #endif
1200
1201 #define OSD_CROSSHAIR_TICK (OSD_CROSSHAIR_RADIUS/2)
1202 #define OSD_CROSSHAIR_BORDER (OSD_CROSSHAIR_TICK + OSD_CROSSHAIR_RADIUS/4)
1203 #define OSD_CROSSHAIR_W ((OSD_CROSSHAIR_RADIUS+OSD_CROSSHAIR_BORDER)*2)
1204 #define OSD_CROSSHAIR_H ((OSD_CROSSHAIR_RADIUS+OSD_CROSSHAIR_BORDER)*2)
1205
1206 static void
1207 osd_render_crosshair_shape(cairo_t *cr) {
1208 cairo_arc (cr, OSD_CROSSHAIR_W/2, OSD_CROSSHAIR_H/2,
1209 OSD_CROSSHAIR_RADIUS, 0, 2*M_PI);
1210
1211 cairo_move_to (cr, OSD_CROSSHAIR_W/2 - OSD_CROSSHAIR_RADIUS,
1212 OSD_CROSSHAIR_H/2);
1213 cairo_rel_line_to (cr, -OSD_CROSSHAIR_TICK, 0);
1214 cairo_move_to (cr, OSD_CROSSHAIR_W/2 + OSD_CROSSHAIR_RADIUS,
1215 OSD_CROSSHAIR_H/2);
1216 cairo_rel_line_to (cr, OSD_CROSSHAIR_TICK, 0);
1217
1218 cairo_move_to (cr, OSD_CROSSHAIR_W/2,
1219 OSD_CROSSHAIR_H/2 - OSD_CROSSHAIR_RADIUS);
1220 cairo_rel_line_to (cr, 0, -OSD_CROSSHAIR_TICK);
1221 cairo_move_to (cr, OSD_CROSSHAIR_W/2,
1222 OSD_CROSSHAIR_H/2 + OSD_CROSSHAIR_RADIUS);
1223 cairo_rel_line_to (cr, 0, OSD_CROSSHAIR_TICK);
1224
1225 cairo_stroke (cr);
1226 }
1227
1228 static void
1229 osd_render_crosshair(osm_gps_map_osd_t *osd)
1230 {
1231 osd_priv_t *priv = (osd_priv_t*)osd->priv;
1232
1233 if(priv->crosshair.rendered)
1234 return;
1235
1236 priv->crosshair.rendered = TRUE;
1237
1238 /* first fill with transparency */
1239 cairo_t *cr = cairo_create(priv->crosshair.surface);
1240 cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1241 cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0);
1242 cairo_paint(cr);
1243 cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1244
1245 cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
1246
1247 cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.5);
1248 cairo_set_line_width (cr, OSD_CROSSHAIR_RADIUS/2);
1249 osd_render_crosshair_shape(cr);
1250
1251 cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.5);
1252 cairo_set_line_width (cr, OSD_CROSSHAIR_RADIUS/4);
1253 osd_render_crosshair_shape(cr);
1254
1255 cairo_destroy(cr);
1256 }
1257 #endif
1258
1259 #ifdef OSD_SCALE
1260
1261 #ifndef OSD_SCALE_FONT_SIZE
1262 #define OSD_SCALE_FONT_SIZE 12
1263 #endif
1264 #define OSD_SCALE_W (10*OSD_SCALE_FONT_SIZE)
1265 #define OSD_SCALE_H (5*OSD_SCALE_FONT_SIZE/2)
1266
1267 /* various parameters used to create the scale */
1268 #define OSD_SCALE_H2 (OSD_SCALE_H/2)
1269 #define OSD_SCALE_TICK (2*OSD_SCALE_FONT_SIZE/3)
1270 #define OSD_SCALE_M (OSD_SCALE_H2 - OSD_SCALE_TICK)
1271 #define OSD_SCALE_I (OSD_SCALE_H2 + OSD_SCALE_TICK)
1272 #define OSD_SCALE_FD (OSD_SCALE_FONT_SIZE/4)
1273
1274 static void
1275 osd_render_scale(osm_gps_map_osd_t *osd)
1276 {
1277 osd_priv_t *priv = (osd_priv_t*)osd->priv;
1278
1279 /* this only needs to be rendered if the zoom has changed */
1280 gint zoom;
1281 g_object_get(OSM_GPS_MAP(osd->widget), "zoom", &zoom, NULL);
1282 if(zoom == priv->scale.zoom)
1283 return;
1284
1285 priv->scale.zoom = zoom;
1286
1287 float m_per_pix = osm_gps_map_get_scale(OSM_GPS_MAP(osd->widget));
1288
1289 /* first fill with transparency */
1290 cairo_t *cr = cairo_create(priv->scale.surface);
1291 cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1292 cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
1293 // pink for testing: cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.2);
1294 cairo_paint(cr);
1295 cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1296
1297 /* determine the size of the scale width in meters */
1298 float width = (OSD_SCALE_W-OSD_SCALE_FONT_SIZE/6) * m_per_pix;
1299
1300 /* scale this to useful values */
1301 int exp = logf(width)*M_LOG10E;
1302 int mant = width/pow(10,exp);
1303 int width_metric = mant * pow(10,exp);
1304 char *dist_str = NULL;
1305 if(width_metric<1000)
1306 dist_str = g_strdup_printf("%u m", width_metric);
1307 else
1308 dist_str = g_strdup_printf("%u km", width_metric/1000);
1309 width_metric /= m_per_pix;
1310
1311 /* and now the hard part: scale for useful imperial values :-( */
1312 /* try to convert to feet, 1ft == 0.3048 m */
1313 width /= 0.3048;
1314 float imp_scale = 0.3048;
1315 char *dist_imp_unit = "ft";
1316
1317 if(width >= 100) {
1318 /* 1yd == 3 feet */
1319 width /= 3.0;
1320 imp_scale *= 3.0;
1321 dist_imp_unit = "yd";
1322
1323 if(width >= 1760.0) {
1324 /* 1mi == 1760 yd */
1325 width /= 1760.0;
1326 imp_scale *= 1760.0;
1327 dist_imp_unit = "mi";
1328 }
1329 }
1330
1331 /* also convert this to full tens/hundreds */
1332 exp = logf(width)*M_LOG10E;
1333 mant = width/pow(10,exp);
1334 int width_imp = mant * pow(10,exp);
1335 char *dist_str_imp = g_strdup_printf("%u %s", width_imp, dist_imp_unit);
1336
1337 /* convert back to pixels */
1338 width_imp *= imp_scale;
1339 width_imp /= m_per_pix;
1340
1341 cairo_select_font_face (cr, "Sans",
1342 CAIRO_FONT_SLANT_NORMAL,
1343 CAIRO_FONT_WEIGHT_BOLD);
1344 cairo_set_font_size (cr, OSD_SCALE_FONT_SIZE);
1345 cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
1346
1347 cairo_text_extents_t extents;
1348 cairo_text_extents (cr, dist_str, &extents);
1349
1350 cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
1351 cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/6);
1352 cairo_move_to (cr, 2*OSD_SCALE_FD, OSD_SCALE_H2-OSD_SCALE_FD);
1353 cairo_text_path (cr, dist_str);
1354 cairo_stroke (cr);
1355 cairo_move_to (cr, 2*OSD_SCALE_FD,
1356 OSD_SCALE_H2+OSD_SCALE_FD + extents.height);
1357 cairo_text_path (cr, dist_str_imp);
1358 cairo_stroke (cr);
1359
1360 cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
1361 cairo_move_to (cr, 2*OSD_SCALE_FD, OSD_SCALE_H2-OSD_SCALE_FD);
1362 cairo_show_text (cr, dist_str);
1363 cairo_move_to (cr, 2*OSD_SCALE_FD,
1364 OSD_SCALE_H2+OSD_SCALE_FD + extents.height);
1365 cairo_show_text (cr, dist_str_imp);
1366
1367 g_free(dist_str);
1368 g_free(dist_str_imp);
1369
1370 /* draw white line */
1371 cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
1372 cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 1.0);
1373 cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/3);
1374 cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_M);
1375 cairo_rel_line_to (cr, 0, OSD_SCALE_TICK);
1376 cairo_rel_line_to (cr, width_metric, 0);
1377 cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1378 cairo_stroke(cr);
1379 cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_I);
1380 cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1381 cairo_rel_line_to (cr, width_imp, 0);
1382 cairo_rel_line_to (cr, 0, +OSD_SCALE_TICK);
1383 cairo_stroke(cr);
1384
1385 /* draw black line */
1386 cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
1387 cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/6);
1388 cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_M);
1389 cairo_rel_line_to (cr, 0, OSD_SCALE_TICK);
1390 cairo_rel_line_to (cr, width_metric, 0);
1391 cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1392 cairo_stroke(cr);
1393 cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_I);
1394 cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1395 cairo_rel_line_to (cr, width_imp, 0);
1396 cairo_rel_line_to (cr, 0, +OSD_SCALE_TICK);
1397 cairo_stroke(cr);
1398
1399 cairo_destroy(cr);
1400 }
1401 #endif
1402
1403 static void
1404 osd_render_controls(osm_gps_map_osd_t *osd)
1405 {
1406 osd_priv_t *priv = (osd_priv_t*)osd->priv;
1407
1408 if(priv->controls.rendered
1409 #ifdef OSD_GPS_BUTTON
1410 && (priv->controls.gps_enabled == (osd->cb != NULL))
1411 #endif
1412 )
1413 return;
1414
1415 #ifdef OSD_GPS_BUTTON
1416 priv->controls.gps_enabled = (osd->cb != NULL);
1417 #endif
1418 priv->controls.rendered = TRUE;
1419
1420 #ifndef OSD_COLOR
1421 GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL];
1422 GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL];
1423 GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE];
1424 #endif
1425
1426 /* first fill with transparency */
1427 cairo_t *cr = cairo_create(priv->controls.surface);
1428 cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1429 cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
1430 cairo_paint(cr);
1431 cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1432
1433 /* --------- draw zoom and dpad shape shadow ----------- */
1434 #ifdef OSD_SHADOW_ENABLE
1435 osd_zoom_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
1436 osd_shape_shadow(cr);
1437 #ifndef OSD_NO_DPAD
1438 osd_dpad_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
1439 osd_shape_shadow(cr);
1440 #endif
1441 #endif
1442
1443 /* --------- draw zoom and dpad shape ----------- */
1444
1445 osd_zoom_shape(cr, 1, 1);
1446 #ifndef OSD_COLOR
1447 osd_shape(cr, &bg, &fg);
1448 #else
1449 osd_shape(cr);
1450 #endif
1451 #ifndef OSD_NO_DPAD
1452 osd_dpad_shape(cr, 1, 1);
1453 #ifndef OSD_COLOR
1454 osd_shape(cr, &bg, &fg);
1455 #else
1456 osd_shape(cr);
1457 #endif
1458 #endif
1459
1460 /* --------- draw zoom and dpad labels --------- */
1461
1462 #ifdef OSD_SHADOW_ENABLE
1463 osd_labels_shadow(cr, Z_RAD/3, TRUE);
1464 osd_zoom_labels(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
1465 #ifndef OSD_NO_DPAD
1466 osd_dpad_labels(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
1467 #endif
1468 cairo_stroke(cr);
1469 #ifdef OSD_GPS_BUTTON
1470 osd_labels_shadow(cr, Z_RAD/6, osd->cb != NULL);
1471 osd_dpad_gps(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
1472 cairo_stroke(cr);
1473 #endif
1474 #endif
1475
1476 #ifndef OSD_COLOR
1477 osd_labels(cr, Z_RAD/3, TRUE, &fg, &da);
1478 #else
1479 osd_labels(cr, Z_RAD/3, TRUE);
1480 #endif
1481 osd_zoom_labels(cr, 1, 1);
1482 #ifndef OSD_NO_DPAD
1483 osd_dpad_labels(cr, 1, 1);
1484 #endif
1485 cairo_stroke(cr);
1486
1487 #ifndef OSD_COLOR
1488 osd_labels(cr, Z_RAD/6, osd->cb != NULL, &fg, &da);
1489 #else
1490 osd_labels(cr, Z_RAD/6, osd->cb != NULL);
1491 #endif
1492 #ifdef OSD_GPS_BUTTON
1493 osd_dpad_gps(cr, 1, 1);
1494 #endif
1495 cairo_stroke(cr);
1496
1497 cairo_destroy(cr);
1498 }
1499
1500 static void
1501 osd_render(osm_gps_map_osd_t *osd)
1502 {
1503 /* this function is actually called pretty often since the */
1504 /* OSD contents may have changed (due to a coordinate/zoom change). */
1505 /* The different OSD parts have to make sure that they don't */
1506 /* render unneccessarily often and thus waste CPU power */
1507
1508 osd_render_controls(osd);
1509
1510 #ifdef OSD_SOURCE_SEL
1511 osd_render_source_sel(osd, FALSE);
1512 #endif
1513
1514 #ifdef OSD_SCALE
1515 osd_render_scale(osd);
1516 #endif
1517
1518 #ifdef OSD_CROSSHAIR
1519 osd_render_crosshair(osd);
1520 #endif
1521
1522 #ifdef OSD_COORDINATES
1523 osd_render_coordinates(osd);
1524 #endif
1525 }
1526
1527 static void
1528 osd_draw(osm_gps_map_osd_t *osd, GdkDrawable *drawable)
1529 {
1530 osd_priv_t *priv = (osd_priv_t*)osd->priv;
1531
1532 /* OSD itself uses some off-screen rendering, so check if the */
1533 /* offscreen buffer is present and create it if not */
1534 if(!priv->controls.surface) {
1535 /* create overlay ... */
1536 priv->controls.surface =
1537 cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W+2, OSD_H+2);
1538
1539 priv->controls.rendered = FALSE;
1540 #ifdef OSD_GPS_BUTTON
1541 priv->controls.gps_enabled = FALSE;
1542 #endif
1543
1544 #ifdef OSD_SOURCE_SEL
1545 /* the initial OSD state is alway not-expanded */
1546 priv->source_sel.surface =
1547 cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1548 OSD_S_W+2, OSD_S_H+2);
1549 priv->source_sel.rendered = FALSE;
1550 #endif
1551
1552 #ifdef OSD_SCALE
1553 priv->scale.surface =
1554 cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1555 OSD_SCALE_W, OSD_SCALE_H);
1556 priv->scale.zoom = -1;
1557 #endif
1558
1559 #ifdef OSD_CROSSHAIR
1560 priv->crosshair.surface =
1561 cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1562 OSD_CROSSHAIR_W, OSD_CROSSHAIR_H);
1563 priv->crosshair.rendered = FALSE;
1564 #endif
1565
1566 #ifdef OSD_COORDINATES
1567 priv->coordinates.surface =
1568 cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1569 OSD_COORDINATES_W, OSD_COORDINATES_H);
1570
1571 priv->coordinates.lat = priv->coordinates.lon = OSM_GPS_MAP_INVALID;
1572 #endif
1573
1574 /* ... and render it */
1575 osd_render(osd);
1576 }
1577
1578 // now draw this onto the original context
1579 cairo_t *cr = gdk_cairo_create(drawable);
1580
1581 gint x, y;
1582
1583 #ifdef OSD_SCALE
1584 x = OSD_X;
1585 y = -OSD_Y;
1586 if(x < 0) x += osd->widget->allocation.width - OSD_SCALE_W;
1587 if(y < 0) y += osd->widget->allocation.height - OSD_SCALE_H;
1588
1589 cairo_set_source_surface(cr, priv->scale.surface, x, y);
1590 cairo_paint(cr);
1591 #endif
1592
1593 #ifdef OSD_CROSSHAIR
1594 x = (osd->widget->allocation.width - OSD_CROSSHAIR_W)/2;
1595 y = (osd->widget->allocation.height - OSD_CROSSHAIR_H)/2;
1596
1597 cairo_set_source_surface(cr, priv->crosshair.surface, x, y);
1598 cairo_paint(cr);
1599 #endif
1600
1601 #ifdef OSD_COORDINATES
1602 x = -OSD_X;
1603 y = -OSD_Y;
1604 if(x < 0) x += osd->widget->allocation.width - OSD_COORDINATES_W;
1605 if(y < 0) y += osd->widget->allocation.height - OSD_COORDINATES_H;
1606
1607 cairo_set_source_surface(cr, priv->coordinates.surface, x, y);
1608 cairo_paint(cr);
1609 #endif
1610
1611 #ifdef OSD_BALLOON
1612 if(priv->balloon.surface) {
1613
1614 /* convert given lat lon into screen coordinates */
1615 gint x, y;
1616 osm_gps_map_geographic_to_screen (OSM_GPS_MAP(osd->widget),
1617 priv->balloon.lat, priv->balloon.lon,
1618 &x, &y);
1619
1620 /* check if balloon needs to be rerendered */
1621 osd_render_balloon(osd);
1622
1623 cairo_set_source_surface(cr, priv->balloon.surface,
1624 x + priv->balloon.offset_x,
1625 y + priv->balloon.offset_y);
1626 cairo_paint(cr);
1627 }
1628 #endif
1629
1630 x = OSD_X;
1631 if(x < 0)
1632 x += osd->widget->allocation.width - OSD_W;
1633
1634 y = OSD_Y;
1635 if(y < 0)
1636 y += osd->widget->allocation.height - OSD_H;
1637
1638 cairo_set_source_surface(cr, priv->controls.surface, x, y);
1639 cairo_paint(cr);
1640
1641 #ifdef OSD_SOURCE_SEL
1642 if(!priv->source_sel.handler_id) {
1643 /* the OSD source selection is not being animated */
1644 if(!priv->source_sel.expanded)
1645 x = osd->widget->allocation.width - OSD_S_W;
1646 else
1647 x = osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
1648 } else
1649 x = priv->source_sel.shift;
1650
1651 y = OSD_S_Y;
1652 if(OSD_S_Y < 0) {
1653 if(!priv->source_sel.expanded)
1654 y = osd->widget->allocation.height - OSD_S_H + OSD_S_Y;
1655 else
1656 y = osd->widget->allocation.height - OSD_S_EXP_H + OSD_S_Y;
1657 }
1658
1659 cairo_set_source_surface(cr, priv->source_sel.surface, x, y);
1660 cairo_paint(cr);
1661 #endif
1662
1663 cairo_destroy(cr);
1664 }
1665
1666 static void
1667 osd_free(osm_gps_map_osd_t *osd)
1668 {
1669 osd_priv_t *priv = (osd_priv_t *)(osd->priv);
1670
1671 if (priv->controls.surface)
1672 cairo_surface_destroy(priv->controls.surface);
1673
1674 #ifdef OSD_SOURCE_SEL
1675 if(priv->source_sel.handler_id)
1676 gtk_timeout_remove(priv->source_sel.handler_id);
1677
1678 if (priv->source_sel.surface)
1679 cairo_surface_destroy(priv->source_sel.surface);
1680 #endif
1681
1682 #ifdef OSD_SCALE
1683 if (priv->scale.surface)
1684 cairo_surface_destroy(priv->scale.surface);
1685 #endif
1686
1687 #ifdef OSD_CROSSHAIR
1688 if (priv->crosshair.surface)
1689 cairo_surface_destroy(priv->crosshair.surface);
1690 #endif
1691
1692 #ifdef OSD_COORDINATES
1693 if (priv->coordinates.surface)
1694 cairo_surface_destroy(priv->coordinates.surface);
1695 #endif
1696
1697 #ifdef OSD_BALLOON
1698 if (priv->balloon.surface)
1699 cairo_surface_destroy(priv->balloon.surface);
1700 #endif
1701
1702 g_free(priv);
1703 }
1704
1705 static gboolean
1706 osd_busy(osm_gps_map_osd_t *osd)
1707 {
1708 #ifdef OSD_SOURCE_SEL
1709 osd_priv_t *priv = (osd_priv_t *)(osd->priv);
1710 return (priv->source_sel.handler_id != 0);
1711 #else
1712 return FALSE;
1713 #endif
1714 }
1715
1716 static osm_gps_map_osd_t osd_classic = {
1717 .widget = NULL,
1718
1719 .draw = osd_draw,
1720 .check = osd_check,
1721 .render = osd_render,
1722 .free = osd_free,
1723 .busy = osd_busy,
1724
1725 .cb = NULL,
1726 .data = NULL,
1727
1728 .priv = NULL
1729 };
1730
1731 /* this is the only function that's externally visible */
1732 void
1733 osm_gps_map_osd_classic_init(OsmGpsMap *map)
1734 {
1735 osd_priv_t *priv = osd_classic.priv = g_new0(osd_priv_t, 1);
1736
1737 #ifdef OSD_BALLOON
1738 priv->balloon.lat = OSM_GPS_MAP_INVALID;
1739 priv->balloon.lon = OSM_GPS_MAP_INVALID;
1740 #endif
1741
1742 osd_classic.priv = priv;
1743
1744 osm_gps_map_register_osd(map, &osd_classic);
1745 }
1746
1747 #ifdef OSD_GPS_BUTTON
1748 /* below are osd specific functions which aren't used by osm-gps-map */
1749 /* but instead are to be used by the main application */
1750 void osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdCallback cb,
1751 gpointer data) {
1752 osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1753 g_return_if_fail (osd);
1754
1755 osd->cb = cb;
1756 osd->data = data;
1757
1758 /* this may have changed the state of the gps button */
1759 /* we thus re-render the overlay */
1760 osd->render(osd);
1761
1762 osm_gps_map_redraw(map);
1763 }
1764 #endif
1765
1766 osd_button_t
1767 osm_gps_map_osd_check(OsmGpsMap *map, gint x, gint y) {
1768 osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1769 g_return_val_if_fail (osd, OSD_NONE);
1770
1771 return osd_check(osd, TRUE, x, y);
1772 }