Parent Directory | Revision Log
Balloon callback extensions
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 <string.h> |
23 | #include <math.h> // M_PI/cos() |
24 | |
25 | /* parameters that can be overwritten from the config file: */ |
26 | /* OSD_DIAMETER */ |
27 | /* OSD_X, OSD_Y */ |
28 | |
29 | #ifndef USE_CAIRO |
30 | #error "OSD control display lacks a non-cairo implementation!" |
31 | #endif |
32 | |
33 | #include <cairo.h> |
34 | |
35 | #include "osm-gps-map.h" |
36 | #include "converter.h" |
37 | #include "osm-gps-map-osd-classic.h" |
38 | |
39 | //the osd controls |
40 | typedef struct { |
41 | /* the offscreen representation of the OSD */ |
42 | struct { |
43 | cairo_surface_t *surface; |
44 | gboolean rendered; |
45 | #ifdef OSD_GPS_BUTTON |
46 | gboolean gps_enabled; |
47 | #endif |
48 | } controls; |
49 | |
50 | #ifdef OSD_BALLOON |
51 | //a balloon with additional info |
52 | struct { |
53 | cairo_surface_t *surface; |
54 | int orientation, offset_x, offset_y; |
55 | |
56 | gboolean just_created; |
57 | float lat, lon; |
58 | OsmGpsMapRect_t rect; |
59 | |
60 | /* function called to have the user app draw the contents */ |
61 | OsmGpsMapBalloonCallback cb; |
62 | gpointer data; |
63 | } balloon; |
64 | #endif |
65 | |
66 | #ifdef OSD_SCALE |
67 | struct { |
68 | cairo_surface_t *surface; |
69 | int zoom; |
70 | } scale; |
71 | #endif |
72 | |
73 | #ifdef OSD_CROSSHAIR |
74 | struct { |
75 | cairo_surface_t *surface; |
76 | gboolean rendered; |
77 | } crosshair; |
78 | #endif |
79 | |
80 | #ifdef OSD_NAV |
81 | struct { |
82 | cairo_surface_t *surface; |
83 | float lat, lon; |
84 | char *name; |
85 | gboolean imperial; // display distance imperial/metric |
86 | } nav; |
87 | #endif |
88 | |
89 | #ifdef OSD_COORDINATES |
90 | struct { |
91 | cairo_surface_t *surface; |
92 | float lat, lon; |
93 | } coordinates; |
94 | #endif |
95 | |
96 | #ifdef OSD_SOURCE_SEL |
97 | struct { |
98 | /* values to handle the "source" menu */ |
99 | cairo_surface_t *surface; |
100 | gboolean expanded; |
101 | gint shift, dir, count; |
102 | gint handler_id; |
103 | gint width, height; |
104 | gboolean rendered; |
105 | } source_sel; |
106 | #endif |
107 | |
108 | } osd_priv_t; |
109 | |
110 | #ifdef OSD_BALLOON |
111 | /* most visual effects are hardcoded by now, but may be made */ |
112 | /* available via properties later */ |
113 | #ifndef BALLOON_AREA_WIDTH |
114 | #define BALLOON_AREA_WIDTH 290 |
115 | #endif |
116 | #ifndef BALLOON_AREA_HEIGHT |
117 | #define BALLOON_AREA_HEIGHT 75 |
118 | #endif |
119 | #ifndef BALLOON_CORNER_RADIUS |
120 | #define BALLOON_CORNER_RADIUS 10 |
121 | #endif |
122 | |
123 | #define BALLOON_BORDER (BALLOON_CORNER_RADIUS/2) |
124 | #define BALLOON_WIDTH (BALLOON_AREA_WIDTH + 2 * BALLOON_BORDER) |
125 | #define BALLOON_HEIGHT (BALLOON_AREA_HEIGHT + 2 * BALLOON_BORDER) |
126 | #define BALLOON_TRANSPARENCY 0.8 |
127 | #define POINTER_HEIGHT 20 |
128 | #define POINTER_FOOT_WIDTH 20 |
129 | #define POINTER_OFFSET (BALLOON_CORNER_RADIUS*3/4) |
130 | #define BALLOON_SHADOW (BALLOON_CORNER_RADIUS/2) |
131 | #define BALLOON_SHADOW_TRANSPARENCY 0.2 |
132 | |
133 | #define BALLOON_W (BALLOON_WIDTH + BALLOON_SHADOW) |
134 | #define BALLOON_H (BALLOON_HEIGHT + POINTER_HEIGHT + BALLOON_SHADOW) |
135 | |
136 | #define CLOSE_BUTTON_RADIUS (BALLOON_CORNER_RADIUS) |
137 | |
138 | |
139 | /* draw the bubble shape. this is used twice, once for the shape and once */ |
140 | /* for the shadow */ |
141 | static void |
142 | osm_gps_map_draw_balloon_shape (cairo_t *cr, int x0, int y0, int x1, int y1, |
143 | gboolean bottom, int px, int py, int px0, int px1) { |
144 | |
145 | cairo_move_to (cr, x0, y0 + BALLOON_CORNER_RADIUS); |
146 | cairo_arc (cr, x0 + BALLOON_CORNER_RADIUS, y0 + BALLOON_CORNER_RADIUS, |
147 | BALLOON_CORNER_RADIUS, -M_PI, -M_PI/2); |
148 | if(!bottom) { |
149 | /* insert top pointer */ |
150 | cairo_line_to (cr, px1, y0); |
151 | cairo_line_to (cr, px, py); |
152 | cairo_line_to (cr, px0, y0); |
153 | } |
154 | |
155 | cairo_line_to (cr, x1 - BALLOON_CORNER_RADIUS, y0); |
156 | cairo_arc (cr, x1 - BALLOON_CORNER_RADIUS, y0 + BALLOON_CORNER_RADIUS, |
157 | BALLOON_CORNER_RADIUS, -M_PI/2, 0); |
158 | cairo_line_to (cr, x1 , y1 - BALLOON_CORNER_RADIUS); |
159 | cairo_arc (cr, x1 - BALLOON_CORNER_RADIUS, y1 - BALLOON_CORNER_RADIUS, |
160 | BALLOON_CORNER_RADIUS, 0, M_PI/2); |
161 | if(bottom) { |
162 | /* insert bottom pointer */ |
163 | cairo_line_to (cr, px0, y1); |
164 | cairo_line_to (cr, px, py); |
165 | cairo_line_to (cr, px1, y1); |
166 | } |
167 | |
168 | cairo_line_to (cr, x0 + BALLOON_CORNER_RADIUS, y1); |
169 | cairo_arc (cr, x0 + BALLOON_CORNER_RADIUS, y1 - BALLOON_CORNER_RADIUS, |
170 | BALLOON_CORNER_RADIUS, M_PI/2, M_PI); |
171 | |
172 | cairo_close_path (cr); |
173 | } |
174 | |
175 | static void |
176 | osd_render_balloon(osm_gps_map_osd_t *osd) { |
177 | osd_priv_t *priv = (osd_priv_t*)osd->priv; |
178 | |
179 | /* get zoom */ |
180 | gint zoom; |
181 | g_object_get(OSM_GPS_MAP(osd->widget), "zoom", &zoom, NULL); |
182 | |
183 | /* ------- convert given coordinate into screen position --------- */ |
184 | gint xs, ys; |
185 | osm_gps_map_geographic_to_screen (OSM_GPS_MAP(osd->widget), |
186 | priv->balloon.lat, priv->balloon.lon, |
187 | &xs, &ys); |
188 | |
189 | gint x0 = 1, y0 = 1; |
190 | |
191 | /* check position of this relative to screen center to determine */ |
192 | /* pointer direction ... */ |
193 | int pointer_x, pointer_x0, pointer_x1; |
194 | int pointer_y; |
195 | |
196 | /* ... and calculate position */ |
197 | int orientation = 0; |
198 | if(xs > osd->widget->allocation.width/2) { |
199 | priv->balloon.offset_x = -BALLOON_WIDTH + POINTER_OFFSET; |
200 | pointer_x = x0 - priv->balloon.offset_x; |
201 | pointer_x0 = pointer_x - (BALLOON_CORNER_RADIUS - POINTER_OFFSET); |
202 | pointer_x1 = pointer_x0 - POINTER_FOOT_WIDTH; |
203 | orientation |= 1; |
204 | } else { |
205 | priv->balloon.offset_x = -POINTER_OFFSET; |
206 | pointer_x = x0 - priv->balloon.offset_x; |
207 | pointer_x1 = pointer_x + (BALLOON_CORNER_RADIUS - POINTER_OFFSET); |
208 | pointer_x0 = pointer_x1 + POINTER_FOOT_WIDTH; |
209 | } |
210 | |
211 | gboolean bottom = FALSE; |
212 | if(ys > osd->widget->allocation.height/2) { |
213 | priv->balloon.offset_y = -BALLOON_HEIGHT - POINTER_HEIGHT; |
214 | pointer_y = y0 - priv->balloon.offset_y; |
215 | bottom = TRUE; |
216 | orientation |= 2; |
217 | } else { |
218 | priv->balloon.offset_y = 0; |
219 | pointer_y = y0 - priv->balloon.offset_y; |
220 | y0 += POINTER_HEIGHT; |
221 | } |
222 | |
223 | /* if required orientation equals current one, then don't render */ |
224 | /* anything */ |
225 | if(orientation == priv->balloon.orientation) |
226 | return; |
227 | |
228 | priv->balloon.orientation = orientation; |
229 | |
230 | /* calculate bottom/right of box */ |
231 | int x1 = x0 + BALLOON_WIDTH, y1 = y0 + BALLOON_HEIGHT; |
232 | |
233 | /* save balloon screen coordinates for later use */ |
234 | priv->balloon.rect.x = x0 + BALLOON_BORDER; |
235 | priv->balloon.rect.y = y0 + BALLOON_BORDER; |
236 | priv->balloon.rect.w = x1 - x0 - 2*BALLOON_BORDER; |
237 | priv->balloon.rect.h = y1 - y0 - 2*BALLOON_BORDER; |
238 | |
239 | cairo_t *cr = cairo_create(priv->balloon.surface); |
240 | cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE); |
241 | cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0); |
242 | cairo_paint(cr); |
243 | cairo_set_operator(cr, CAIRO_OPERATOR_OVER); |
244 | |
245 | /* --------- draw shadow --------------- */ |
246 | osm_gps_map_draw_balloon_shape (cr, |
247 | x0 + BALLOON_SHADOW, y0 + BALLOON_SHADOW, |
248 | x1 + BALLOON_SHADOW, y1 + BALLOON_SHADOW, |
249 | bottom, pointer_x, pointer_y, |
250 | pointer_x0 + BALLOON_SHADOW, pointer_x1 + BALLOON_SHADOW); |
251 | |
252 | cairo_set_source_rgba (cr, 0, 0, 0, BALLOON_SHADOW_TRANSPARENCY); |
253 | cairo_fill_preserve (cr); |
254 | cairo_set_source_rgba (cr, 1, 0, 0, 1.0); |
255 | cairo_set_line_width (cr, 0); |
256 | cairo_stroke (cr); |
257 | |
258 | /* --------- draw main shape ----------- */ |
259 | osm_gps_map_draw_balloon_shape (cr, x0, y0, x1, y1, |
260 | bottom, pointer_x, pointer_y, pointer_x0, pointer_x1); |
261 | |
262 | cairo_set_source_rgba (cr, 1, 1, 1, BALLOON_TRANSPARENCY); |
263 | cairo_fill_preserve (cr); |
264 | cairo_set_source_rgba (cr, 0, 0, 0, BALLOON_TRANSPARENCY); |
265 | cairo_set_line_width (cr, 1); |
266 | cairo_stroke (cr); |
267 | |
268 | if (priv->balloon.cb) { |
269 | osm_gps_map_balloon_event_t event; |
270 | |
271 | /* clip in case application tries to draw in */ |
272 | /* exceed of the balloon */ |
273 | cairo_rectangle (cr, priv->balloon.rect.x, priv->balloon.rect.y, |
274 | priv->balloon.rect.w, priv->balloon.rect.h); |
275 | cairo_clip (cr); |
276 | cairo_new_path (cr); /* current path is not consumed by cairo_clip */ |
277 | |
278 | /* request the application to draw the balloon contents */ |
279 | event.type = OSM_GPS_MAP_BALLOON_EVENT_TYPE_DRAW; |
280 | event.data.draw.rect = &priv->balloon.rect; |
281 | event.data.draw.cr = cr; |
282 | |
283 | priv->balloon.cb(&event, priv->balloon.data); |
284 | } |
285 | |
286 | cairo_destroy(cr); |
287 | } |
288 | |
289 | /* return true if balloon is being displayed and if */ |
290 | /* the given coordinate is within this balloon */ |
291 | static gboolean |
292 | osd_balloon_check(osm_gps_map_osd_t *osd, gboolean click, gboolean down, gint x, gint y) |
293 | { |
294 | osd_priv_t *priv = (osd_priv_t*)osd->priv; |
295 | |
296 | if(!priv->balloon.surface) |
297 | return FALSE; |
298 | |
299 | gint xs, ys; |
300 | osm_gps_map_geographic_to_screen (OSM_GPS_MAP(osd->widget), |
301 | priv->balloon.lat, priv->balloon.lon, |
302 | &xs, &ys); |
303 | |
304 | xs += priv->balloon.rect.x + priv->balloon.offset_x; |
305 | ys += priv->balloon.rect.y + priv->balloon.offset_y; |
306 | |
307 | gboolean is_in = |
308 | (x > xs) && (x < xs + priv->balloon.rect.w) && |
309 | (y > ys) && (y < ys + priv->balloon.rect.h); |
310 | |
311 | /* is this a real click or is the application just checking for something? */ |
312 | if(click) { |
313 | |
314 | /* handle the fact that the balloon may have been created by the */ |
315 | /* button down event */ |
316 | if(!is_in && !down && !priv->balloon.just_created) { |
317 | /* the user actually clicked outside the balloon */ |
318 | |
319 | /* close the balloon! */ |
320 | osm_gps_map_osd_clear_balloon (OSM_GPS_MAP(osd->widget)); |
321 | |
322 | /* and inform application about this */ |
323 | if(priv->balloon.cb) { |
324 | osm_gps_map_balloon_event_t event; |
325 | event.type = OSM_GPS_MAP_BALLOON_EVENT_TYPE_REMOVED; |
326 | priv->balloon.cb(&event, priv->balloon.data); |
327 | } |
328 | |
329 | } |
330 | |
331 | if(is_in && priv->balloon.cb) { |
332 | osm_gps_map_balloon_event_t event; |
333 | |
334 | /* notify application of click */ |
335 | event.type = OSM_GPS_MAP_BALLOON_EVENT_TYPE_CLICK; |
336 | event.data.click.x = x - xs; |
337 | event.data.click.y = y - ys; |
338 | event.data.click.down = down; |
339 | |
340 | priv->balloon.cb(&event, priv->balloon.data); |
341 | } |
342 | } |
343 | |
344 | return is_in; |
345 | } |
346 | |
347 | void osm_gps_map_osd_clear_balloon (OsmGpsMap *map) { |
348 | g_return_if_fail (OSM_IS_GPS_MAP (map)); |
349 | |
350 | osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map); |
351 | g_return_if_fail (osd); |
352 | |
353 | osd_priv_t *priv = (osd_priv_t*)osd->priv; |
354 | g_return_if_fail (priv); |
355 | |
356 | if(priv->balloon.surface) { |
357 | cairo_surface_destroy(priv->balloon.surface); |
358 | priv->balloon.surface = NULL; |
359 | priv->balloon.lat = OSM_GPS_MAP_INVALID; |
360 | priv->balloon.lon = OSM_GPS_MAP_INVALID; |
361 | } |
362 | osm_gps_map_redraw(map); |
363 | } |
364 | |
365 | void |
366 | osm_gps_map_osd_draw_balloon (OsmGpsMap *map, float latitude, float longitude, |
367 | OsmGpsMapBalloonCallback cb, gpointer data) { |
368 | g_return_if_fail (OSM_IS_GPS_MAP (map)); |
369 | |
370 | osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map); |
371 | g_return_if_fail (osd); |
372 | |
373 | osd_priv_t *priv = (osd_priv_t*)osd->priv; |
374 | g_return_if_fail (priv); |
375 | |
376 | osm_gps_map_osd_clear_balloon (map); |
377 | |
378 | /* allocate balloon surface */ |
379 | priv->balloon.surface = |
380 | cairo_image_surface_create(CAIRO_FORMAT_ARGB32, |
381 | BALLOON_W+2, BALLOON_H+2); |
382 | |
383 | priv->balloon.lat = latitude; |
384 | priv->balloon.lon = longitude; |
385 | priv->balloon.cb = cb; |
386 | priv->balloon.data = data; |
387 | priv->balloon.just_created = TRUE; |
388 | |
389 | priv->balloon.orientation = -1; |
390 | |
391 | osd_render_balloon(osd); |
392 | |
393 | osm_gps_map_redraw(map); |
394 | } |
395 | |
396 | #endif // OSD_BALLOON |
397 | |
398 | /* position and extent of bounding box */ |
399 | #ifndef OSD_X |
400 | #define OSD_X (10) |
401 | #endif |
402 | |
403 | #ifndef OSD_Y |
404 | #define OSD_Y (10) |
405 | #endif |
406 | |
407 | /* parameters of the direction shape */ |
408 | #ifndef OSD_DIAMETER |
409 | #define D_RAD (30) // diameter of dpad |
410 | #else |
411 | #define D_RAD (OSD_DIAMETER) |
412 | #endif |
413 | #define D_TIP (4*D_RAD/5) // distance of arrow tip from dpad center |
414 | #define D_LEN (D_RAD/4) // length of arrow |
415 | #define D_WID (D_LEN) // width of arrow |
416 | |
417 | /* parameters of the "zoom" pad */ |
418 | #define Z_STEP (D_RAD/4) // distance between dpad and zoom |
419 | #define Z_RAD (D_RAD/2) // radius of "caps" of zoom bar |
420 | |
421 | #ifdef OSD_SHADOW_ENABLE |
422 | /* shadow also depends on control size */ |
423 | #define OSD_SHADOW (D_RAD/6) |
424 | #else |
425 | #define OSD_SHADOW (0) |
426 | #endif |
427 | |
428 | /* normally the GPS button is in the center of the dpad. if there's */ |
429 | /* no dpad it will go into the zoom area */ |
430 | #if defined(OSD_GPS_BUTTON) && defined(OSD_NO_DPAD) |
431 | #define Z_GPS 1 |
432 | #else |
433 | #define Z_GPS 0 |
434 | #endif |
435 | |
436 | /* total width and height of controls incl. shadow */ |
437 | #define OSD_W (2*D_RAD + OSD_SHADOW + Z_GPS * 2 * Z_RAD) |
438 | #if !Z_GPS |
439 | #define OSD_H (2*D_RAD + Z_STEP + 2*Z_RAD + OSD_SHADOW) |
440 | #else |
441 | #define OSD_H (2*Z_RAD + OSD_SHADOW) |
442 | #endif |
443 | |
444 | #ifdef OSD_SHADOW_ENABLE |
445 | #define OSD_LBL_SHADOW (OSD_SHADOW/2) |
446 | #endif |
447 | |
448 | #define Z_TOP ((1-Z_GPS) * (2 * D_RAD + Z_STEP)) |
449 | |
450 | #define Z_MID (Z_TOP + Z_RAD) |
451 | #define Z_BOT (Z_MID + Z_RAD) |
452 | #define Z_LEFT (Z_RAD) |
453 | #define Z_RIGHT (2 * D_RAD - Z_RAD + Z_GPS * 2 * Z_RAD) |
454 | #define Z_CENTER ((Z_RIGHT + Z_LEFT)/2) |
455 | |
456 | /* create the cairo shape used for the zoom buttons */ |
457 | static void |
458 | osd_zoom_shape(cairo_t *cr, gint x, gint y) |
459 | { |
460 | cairo_move_to (cr, x+Z_LEFT, y+Z_TOP); |
461 | cairo_line_to (cr, x+Z_RIGHT, y+Z_TOP); |
462 | cairo_arc (cr, x+Z_RIGHT, y+Z_MID, Z_RAD, -M_PI/2, M_PI/2); |
463 | cairo_line_to (cr, x+Z_LEFT, y+Z_BOT); |
464 | cairo_arc (cr, x+Z_LEFT, y+Z_MID, Z_RAD, M_PI/2, -M_PI/2); |
465 | } |
466 | |
467 | /* ------------------- color/shadow functions ----------------- */ |
468 | |
469 | #ifndef OSD_COLOR |
470 | /* if no color has been specified we just use the gdks default colors */ |
471 | static void |
472 | osd_labels(cairo_t *cr, gint width, gboolean enabled, |
473 | GdkColor *fg, GdkColor *disabled) { |
474 | if(enabled) gdk_cairo_set_source_color(cr, fg); |
475 | else gdk_cairo_set_source_color(cr, disabled); |
476 | cairo_set_line_width (cr, width); |
477 | } |
478 | #else |
479 | static void |
480 | osd_labels(cairo_t *cr, gint width, gboolean enabled) { |
481 | if(enabled) cairo_set_source_rgb (cr, OSD_COLOR); |
482 | else cairo_set_source_rgb (cr, OSD_COLOR_DISABLED); |
483 | cairo_set_line_width (cr, width); |
484 | } |
485 | #endif |
486 | |
487 | #ifdef OSD_SHADOW_ENABLE |
488 | static void |
489 | osd_labels_shadow(cairo_t *cr, gint width, gboolean enabled) { |
490 | cairo_set_source_rgba (cr, 0, 0, 0, enabled?0.3:0.15); |
491 | cairo_set_line_width (cr, width); |
492 | } |
493 | #endif |
494 | |
495 | #ifndef OSD_NO_DPAD |
496 | /* create the cairo shape used for the dpad */ |
497 | static void |
498 | osd_dpad_shape(cairo_t *cr, gint x, gint y) |
499 | { |
500 | cairo_arc (cr, x+D_RAD, y+D_RAD, D_RAD, 0, 2 * M_PI); |
501 | } |
502 | #endif |
503 | |
504 | #ifdef OSD_SHADOW_ENABLE |
505 | static void |
506 | osd_shape_shadow(cairo_t *cr) { |
507 | cairo_set_source_rgba (cr, 0, 0, 0, 0.2); |
508 | cairo_fill (cr); |
509 | cairo_stroke (cr); |
510 | } |
511 | #endif |
512 | |
513 | #ifndef OSD_COLOR |
514 | /* if no color has been specified we just use the gdks default colors */ |
515 | static void |
516 | osd_shape(cairo_t *cr, GdkColor *bg, GdkColor *fg) { |
517 | gdk_cairo_set_source_color(cr, bg); |
518 | cairo_fill_preserve (cr); |
519 | gdk_cairo_set_source_color(cr, fg); |
520 | cairo_set_line_width (cr, 1); |
521 | cairo_stroke (cr); |
522 | } |
523 | #else |
524 | static void |
525 | osd_shape(cairo_t *cr) { |
526 | cairo_set_source_rgb (cr, OSD_COLOR_BG); |
527 | cairo_fill_preserve (cr); |
528 | cairo_set_source_rgb (cr, OSD_COLOR); |
529 | cairo_set_line_width (cr, 1); |
530 | cairo_stroke (cr); |
531 | } |
532 | #endif |
533 | |
534 | |
535 | static gboolean |
536 | osm_gps_map_in_circle(gint x, gint y, gint cx, gint cy, gint rad) |
537 | { |
538 | return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad); |
539 | } |
540 | |
541 | #ifndef OSD_NO_DPAD |
542 | /* check whether x/y is within the dpad */ |
543 | static osd_button_t |
544 | osd_check_dpad(gint x, gint y) |
545 | { |
546 | /* within entire dpad circle */ |
547 | if( osm_gps_map_in_circle(x, y, D_RAD, D_RAD, D_RAD)) |
548 | { |
549 | /* convert into position relative to dpads centre */ |
550 | x -= D_RAD; |
551 | y -= D_RAD; |
552 | |
553 | #ifdef OSD_GPS_BUTTON |
554 | /* check for dpad center goes here! */ |
555 | if( osm_gps_map_in_circle(x, y, 0, 0, D_RAD/3)) |
556 | return OSD_GPS; |
557 | #endif |
558 | |
559 | if( y < 0 && abs(x) < abs(y)) |
560 | return OSD_UP; |
561 | |
562 | if( y > 0 && abs(x) < abs(y)) |
563 | return OSD_DOWN; |
564 | |
565 | if( x < 0 && abs(y) < abs(x)) |
566 | return OSD_LEFT; |
567 | |
568 | if( x > 0 && abs(y) < abs(x)) |
569 | return OSD_RIGHT; |
570 | |
571 | return OSD_BG; |
572 | } |
573 | return OSD_NONE; |
574 | } |
575 | #endif |
576 | |
577 | /* check whether x/y is within the zoom pads */ |
578 | static osd_button_t |
579 | osd_check_zoom(gint x, gint y) { |
580 | if( x > 0 && x < OSD_W && y > Z_TOP && y < Z_BOT) { |
581 | |
582 | /* within circle around (-) label */ |
583 | if( osm_gps_map_in_circle(x, y, Z_LEFT, Z_MID, Z_RAD)) |
584 | return OSD_OUT; |
585 | |
586 | /* within circle around (+) label */ |
587 | if( osm_gps_map_in_circle(x, y, Z_RIGHT, Z_MID, Z_RAD)) |
588 | return OSD_IN; |
589 | |
590 | #if Z_GPS == 1 |
591 | /* within square around center */ |
592 | if( x > Z_CENTER - Z_RAD && x < Z_CENTER + Z_RAD) |
593 | return OSD_GPS; |
594 | #endif |
595 | |
596 | /* between center of (-) button and center of entire zoom control area */ |
597 | if(x > OSD_LEFT && x < D_RAD) |
598 | return OSD_OUT; |
599 | |
600 | /* between center of (+) button and center of entire zoom control area */ |
601 | if(x < OSD_RIGHT && x > D_RAD) |
602 | return OSD_IN; |
603 | } |
604 | |
605 | return OSD_NONE; |
606 | } |
607 | |
608 | #ifdef OSD_SOURCE_SEL |
609 | |
610 | /* place source selection at right border */ |
611 | #define OSD_S_RAD (Z_RAD) |
612 | #define OSD_S_X (-OSD_X) |
613 | #define OSD_S_Y (OSD_Y) |
614 | #define OSD_S_PW (2 * Z_RAD) |
615 | #define OSD_S_W (OSD_S_PW) |
616 | #define OSD_S_PH (2 * Z_RAD) |
617 | #define OSD_S_H (OSD_S_PH + OSD_SHADOW) |
618 | |
619 | /* size of usable area when expanded */ |
620 | #define OSD_S_AREA_W (priv->source_sel.width) |
621 | #define OSD_S_AREA_H (priv->source_sel.height) |
622 | #define OSD_S_EXP_W (OSD_S_PW + OSD_S_AREA_W + OSD_SHADOW) |
623 | #define OSD_S_EXP_H (OSD_S_AREA_H + OSD_SHADOW) |
624 | |
625 | /* internal value to draw the arrow on the "puller" */ |
626 | #define OSD_S_D0 (OSD_S_RAD/2) |
627 | #ifndef OSD_FONT_SIZE |
628 | #define OSD_FONT_SIZE 16.0 |
629 | #endif |
630 | #define OSD_TEXT_BORDER (OSD_FONT_SIZE/2) |
631 | #define OSD_TEXT_SKIP (OSD_FONT_SIZE/8) |
632 | |
633 | /* draw the shape of the source selection OSD, either only the puller (not expanded) */ |
634 | /* or the entire menu incl. the puller (expanded) */ |
635 | static void |
636 | osd_source_shape(osd_priv_t *priv, cairo_t *cr, gint x, gint y) { |
637 | if(!priv->source_sel.expanded) { |
638 | /* just draw the puller */ |
639 | cairo_move_to (cr, x + OSD_S_PW, y + OSD_S_PH); |
640 | cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2); |
641 | cairo_line_to (cr, x + OSD_S_PW, y); |
642 | } else { |
643 | /* draw the puller and the area itself */ |
644 | cairo_move_to (cr, x + OSD_S_PW + OSD_S_AREA_W, y + OSD_S_AREA_H); |
645 | cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_AREA_H); |
646 | if(OSD_S_Y > 0) { |
647 | cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_PH); |
648 | cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2); |
649 | } else { |
650 | cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_AREA_H-OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2); |
651 | cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_AREA_H - OSD_S_PH); |
652 | cairo_line_to (cr, x + OSD_S_PW, y); |
653 | } |
654 | cairo_line_to (cr, x + OSD_S_PW + OSD_S_AREA_W, y); |
655 | cairo_close_path (cr); |
656 | } |
657 | } |
658 | |
659 | static void |
660 | osd_source_content(osm_gps_map_osd_t *osd, cairo_t *cr, gint offset) { |
661 | osd_priv_t *priv = (osd_priv_t*)osd->priv; |
662 | |
663 | int py = offset + OSD_S_RAD - OSD_S_D0; |
664 | |
665 | if(!priv->source_sel.expanded) { |
666 | /* draw the "puller" open (<) arrow */ |
667 | cairo_move_to (cr, offset + OSD_S_RAD + OSD_S_D0/2, py); |
668 | cairo_rel_line_to (cr, -OSD_S_D0, +OSD_S_D0); |
669 | cairo_rel_line_to (cr, +OSD_S_D0, +OSD_S_D0); |
670 | } else { |
671 | if(OSD_S_Y < 0) |
672 | py += OSD_S_AREA_H - OSD_S_PH; |
673 | |
674 | /* draw the "puller" close (>) arrow */ |
675 | cairo_move_to (cr, offset + OSD_S_RAD - OSD_S_D0/2, py); |
676 | cairo_rel_line_to (cr, +OSD_S_D0, +OSD_S_D0); |
677 | cairo_rel_line_to (cr, -OSD_S_D0, +OSD_S_D0); |
678 | cairo_stroke(cr); |
679 | |
680 | /* don't draw a shadow for the text content */ |
681 | if(offset == 1) { |
682 | gint source; |
683 | g_object_get(osd->widget, "map-source", &source, NULL); |
684 | |
685 | cairo_select_font_face (cr, "Sans", |
686 | CAIRO_FONT_SLANT_NORMAL, |
687 | CAIRO_FONT_WEIGHT_BOLD); |
688 | cairo_set_font_size (cr, OSD_FONT_SIZE); |
689 | |
690 | int i, step = (priv->source_sel.height - 2*OSD_TEXT_BORDER) / |
691 | OSM_GPS_MAP_SOURCE_LAST; |
692 | for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) { |
693 | cairo_text_extents_t extents; |
694 | const char *src = osm_gps_map_source_get_friendly_name(i); |
695 | cairo_text_extents (cr, src, &extents); |
696 | |
697 | int x = offset + OSD_S_PW + OSD_TEXT_BORDER; |
698 | int y = offset + step * (i-1) + OSD_TEXT_BORDER; |
699 | |
700 | /* draw filled rectangle if selected */ |
701 | if(source == i) { |
702 | cairo_rectangle(cr, x - OSD_TEXT_BORDER/2, |
703 | y - OSD_TEXT_SKIP, |
704 | priv->source_sel.width - OSD_TEXT_BORDER, |
705 | step + OSD_TEXT_SKIP); |
706 | cairo_fill(cr); |
707 | |
708 | /* temprarily draw with background color */ |
709 | #ifndef OSD_COLOR |
710 | GdkColor bg = osd->widget->style->bg[GTK_STATE_NORMAL]; |
711 | gdk_cairo_set_source_color(cr, &bg); |
712 | #else |
713 | cairo_set_source_rgb (cr, OSD_COLOR_BG); |
714 | #endif |
715 | } |
716 | |
717 | cairo_move_to (cr, x, y + OSD_TEXT_SKIP - extents.y_bearing); |
718 | cairo_show_text (cr, src); |
719 | |
720 | /* restore color */ |
721 | if(source == i) { |
722 | #ifndef OSD_COLOR |
723 | GdkColor fg = osd->widget->style->fg[GTK_STATE_NORMAL]; |
724 | gdk_cairo_set_source_color(cr, &fg); |
725 | #else |
726 | cairo_set_source_rgb (cr, OSD_COLOR); |
727 | #endif |
728 | } |
729 | } |
730 | } |
731 | } |
732 | } |
733 | |
734 | static void |
735 | osd_render_source_sel(osm_gps_map_osd_t *osd, gboolean force_rerender) { |
736 | osd_priv_t *priv = (osd_priv_t*)osd->priv; |
737 | |
738 | if(priv->source_sel.rendered && !force_rerender) |
739 | return; |
740 | |
741 | priv->source_sel.rendered = TRUE; |
742 | |
743 | #ifndef OSD_COLOR |
744 | GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL]; |
745 | GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL]; |
746 | GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE]; |
747 | #endif |
748 | |
749 | /* draw source selector */ |
750 | cairo_t *cr = cairo_create(priv->source_sel.surface); |
751 | cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE); |
752 | cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0); |
753 | cairo_paint(cr); |
754 | cairo_set_operator(cr, CAIRO_OPERATOR_OVER); |
755 | |
756 | #ifdef OSD_SHADOW_ENABLE |
757 | osd_source_shape(priv, cr, 1+OSD_SHADOW, 1+OSD_SHADOW); |
758 | osd_shape_shadow(cr); |
759 | #endif |
760 | |
761 | osd_source_shape(priv, cr, 1, 1); |
762 | #ifndef OSD_COLOR |
763 | osd_shape(cr, &bg, &fg); |
764 | #else |
765 | osd_shape(cr); |
766 | #endif |
767 | |
768 | #ifdef OSD_SHADOW_ENABLE |
769 | osd_labels_shadow(cr, Z_RAD/3, TRUE); |
770 | osd_source_content(osd, cr, 1+OSD_LBL_SHADOW); |
771 | cairo_stroke (cr); |
772 | #endif |
773 | #ifndef OSD_COLOR |
774 | osd_labels(cr, Z_RAD/3, TRUE, &fg, &da); |
775 | #else |
776 | osd_labels(cr, Z_RAD/3, TRUE); |
777 | #endif |
778 | osd_source_content(osd, cr, 1); |
779 | cairo_stroke (cr); |
780 | |
781 | cairo_destroy(cr); |
782 | } |
783 | |
784 | /* re-allocate the buffer used to draw the menu. This is used */ |
785 | /* to collapse/expand the buffer */ |
786 | static void |
787 | osd_source_reallocate(osm_gps_map_osd_t *osd) { |
788 | osd_priv_t *priv = (osd_priv_t*)osd->priv; |
789 | |
790 | /* re-allocate offscreen bitmap */ |
791 | g_assert (priv->source_sel.surface); |
792 | |
793 | int w = OSD_S_W, h = OSD_S_H; |
794 | if(priv->source_sel.expanded) { |
795 | cairo_text_extents_t extents; |
796 | |
797 | /* determine content size */ |
798 | cairo_t *cr = cairo_create(priv->source_sel.surface); |
799 | cairo_select_font_face (cr, "Sans", |
800 | CAIRO_FONT_SLANT_NORMAL, |
801 | CAIRO_FONT_WEIGHT_BOLD); |
802 | cairo_set_font_size (cr, OSD_FONT_SIZE); |
803 | |
804 | /* calculate menu size */ |
805 | int i, max_h = 0, max_w = 0; |
806 | for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) { |
807 | const char *src = osm_gps_map_source_get_friendly_name(i); |
808 | cairo_text_extents (cr, src, &extents); |
809 | |
810 | if(extents.width > max_w) max_w = extents.width; |
811 | if(extents.height > max_h) max_h = extents.height; |
812 | } |
813 | cairo_destroy(cr); |
814 | |
815 | priv->source_sel.width = max_w + 2*OSD_TEXT_BORDER; |
816 | priv->source_sel.height = OSM_GPS_MAP_SOURCE_LAST * |
817 | (max_h + 2*OSD_TEXT_SKIP) + 2*OSD_TEXT_BORDER; |
818 | |
819 | w = OSD_S_EXP_W; |
820 | h = OSD_S_EXP_H; |
821 | } |
822 | |
823 | cairo_surface_destroy(priv->source_sel.surface); |
824 | priv->source_sel.surface = |
825 | cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w+2, h+2); |
826 | |
827 | osd_render_source_sel(osd, TRUE); |
828 | } |
829 | |
830 | #define OSD_HZ 15 |
831 | #define OSD_TIME 500 |
832 | |
833 | static gboolean osd_source_animate(gpointer data) { |
834 | osm_gps_map_osd_t *osd = (osm_gps_map_osd_t*)data; |
835 | osd_priv_t *priv = (osd_priv_t*)osd->priv; |
836 | int diff = OSD_S_EXP_W - OSD_S_W - OSD_S_X; |
837 | gboolean done = FALSE; |
838 | priv->source_sel.count += priv->source_sel.dir; |
839 | |
840 | /* shifting in */ |
841 | if(priv->source_sel.dir < 0) { |
842 | if(priv->source_sel.count <= 0) { |
843 | priv->source_sel.count = 0; |
844 | done = TRUE; |
845 | } |
846 | } else { |
847 | if(priv->source_sel.count >= 1000) { |
848 | priv->source_sel.expanded = FALSE; |
849 | osd_source_reallocate(osd); |
850 | |
851 | priv->source_sel.count = 1000; |
852 | done = TRUE; |
853 | } |
854 | } |
855 | |
856 | |
857 | /* count runs linearly from 0 to 1000, map this nicely onto a position */ |
858 | |
859 | /* nice sinoid mapping */ |
860 | float m = 0.5-cos(priv->source_sel.count * M_PI / 1000.0)/2; |
861 | priv->source_sel.shift = |
862 | (osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X) + |
863 | m * diff; |
864 | |
865 | /* make sure the screen is updated */ |
866 | osm_gps_map_repaint(OSM_GPS_MAP(osd->widget)); |
867 | |
868 | /* stop animation if done */ |
869 | if(done) |
870 | priv->source_sel.handler_id = 0; |
871 | |
872 | return !done; |
873 | } |
874 | |
875 | /* switch between expand and collapse mode of source selection */ |
876 | static void |
877 | osd_source_toggle(osm_gps_map_osd_t *osd) |
878 | { |
879 | osd_priv_t *priv = (osd_priv_t*)osd->priv; |
880 | |
881 | /* ignore clicks while animation is running */ |
882 | if(priv->source_sel.handler_id) |
883 | return; |
884 | |
885 | /* expand immediately, collapse is handle at the end of the */ |
886 | /* collapse animation */ |
887 | if(!priv->source_sel.expanded) { |
888 | priv->source_sel.expanded = TRUE; |
889 | osd_source_reallocate(osd); |
890 | |
891 | priv->source_sel.count = 1000; |
892 | priv->source_sel.shift = osd->widget->allocation.width - OSD_S_W; |
893 | priv->source_sel.dir = -1000/OSD_HZ; |
894 | } else { |
895 | priv->source_sel.count = 0; |
896 | priv->source_sel.shift = osd->widget->allocation.width - |
897 | OSD_S_EXP_W + OSD_S_X; |
898 | priv->source_sel.dir = +1000/OSD_HZ; |
899 | } |
900 | |
901 | /* start timer to handle animation */ |
902 | priv->source_sel.handler_id = gtk_timeout_add(OSD_TIME/OSD_HZ, |
903 | osd_source_animate, osd); |
904 | } |
905 | |
906 | /* check if the user clicked inside the source selection area */ |
907 | static osd_button_t |
908 | osd_source_check(osm_gps_map_osd_t *osd, gboolean down, gint x, gint y) { |
909 | osd_priv_t *priv = (osd_priv_t*)osd->priv; |
910 | |
911 | if(!priv->source_sel.expanded) |
912 | x -= osd->widget->allocation.width - OSD_S_W; |
913 | else |
914 | x -= osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X; |
915 | |
916 | if(OSD_S_Y > 0) |
917 | y -= OSD_S_Y; |
918 | else |
919 | y -= osd->widget->allocation.height - OSD_S_PH + OSD_S_Y; |
920 | |
921 | /* within square around puller? */ |
922 | if(y > 0 && y < OSD_S_PH && x > 0 && x < OSD_S_PW) { |
923 | /* really within puller shape? */ |
924 | if(x > Z_RAD || osm_gps_map_in_circle(x, y, Z_RAD, Z_RAD, Z_RAD)) { |
925 | /* expand source selector */ |
926 | if(down) |
927 | osd_source_toggle(osd); |
928 | |
929 | /* tell upper layers that user clicked some background element */ |
930 | /* of the OSD */ |
931 | return OSD_BG; |
932 | } |
933 | } |
934 | |
935 | /* check for clicks into data area */ |
936 | if(priv->source_sel.expanded && !priv->source_sel.handler_id) { |
937 | /* re-adjust from puller top to content top */ |
938 | if(OSD_S_Y < 0) |
939 | y += OSD_S_EXP_H - OSD_S_PH; |
940 | |
941 | if(x > OSD_S_PW && |
942 | x < OSD_S_PW + OSD_S_EXP_W && |
943 | y > 0 && |
944 | y < OSD_S_EXP_H) { |
945 | |
946 | int step = (priv->source_sel.height - 2*OSD_TEXT_BORDER) |
947 | / OSM_GPS_MAP_SOURCE_LAST; |
948 | |
949 | y -= OSD_TEXT_BORDER - OSD_TEXT_SKIP; |
950 | y /= step; |
951 | y += 1; |
952 | |
953 | if(down) { |
954 | gint old = 0; |
955 | g_object_get(osd->widget, "map-source", &old, NULL); |
956 | |
957 | if(y > OSM_GPS_MAP_SOURCE_NULL && |
958 | y <= OSM_GPS_MAP_SOURCE_LAST && |
959 | old != y) { |
960 | g_object_set(osd->widget, "map-source", y, NULL); |
961 | |
962 | osd_render_source_sel(osd, TRUE); |
963 | osm_gps_map_repaint(OSM_GPS_MAP(osd->widget)); |
964 | } |
965 | } |
966 | |
967 | /* return "clicked in OSD background" to prevent further */ |
968 | /* processing by application */ |
969 | return OSD_BG; |
970 | } |
971 | } |
972 | |
973 | return OSD_NONE; |
974 | } |
975 | #endif // OSD_SOURCE_SEL |
976 | |
977 | static osd_button_t |
978 | osd_check_int(osm_gps_map_osd_t *osd, gboolean click, gboolean down, gint x, gint y) { |
979 | osd_button_t but = OSD_NONE; |
980 | |
981 | #ifdef OSD_BALLOON |
982 | if(down) { |
983 | /* needed to handle balloons that are created at click */ |
984 | osd_priv_t *priv = (osd_priv_t*)osd->priv; |
985 | priv->balloon.just_created = FALSE; |
986 | } |
987 | #endif |
988 | |
989 | #ifdef OSD_SOURCE_SEL |
990 | /* the source selection area is handles internally */ |
991 | but = osd_source_check(osd, down, x, y); |
992 | #endif |
993 | |
994 | if(but == OSD_NONE) { |
995 | gint mx = x - OSD_X; |
996 | gint my = y - OSD_Y; |
997 | |
998 | if(OSD_X < 0) |
999 | mx -= (osd->widget->allocation.width - OSD_W); |
1000 | |
1001 | if(OSD_Y < 0) |
1002 | my -= (osd->widget->allocation.height - OSD_H); |
1003 | |
1004 | /* first do a rough test for the OSD area. */ |
1005 | /* this is just to avoid an unnecessary detailed test */ |
1006 | if(mx > 0 && mx < OSD_W && my > 0 && my < OSD_H) { |
1007 | #ifndef OSD_NO_DPAD |
1008 | but = osd_check_dpad(mx, my); |
1009 | #endif |
1010 | } |
1011 | |
1012 | if(but == OSD_NONE) |
1013 | but = osd_check_zoom(mx, my); |
1014 | } |
1015 | |
1016 | #ifdef OSD_BALLOON |
1017 | if(but == OSD_NONE) { |
1018 | /* check if user clicked into balloon */ |
1019 | if(osd_balloon_check(osd, click, down, x, y)) |
1020 | but = OSD_BG; |
1021 | } |
1022 | #endif |
1023 | |
1024 | return but; |
1025 | } |
1026 | |
1027 | #ifndef OSD_NO_DPAD |
1028 | static void |
1029 | osd_dpad_labels(cairo_t *cr, gint x, gint y) { |
1030 | /* move reference to dpad center */ |
1031 | x += D_RAD; |
1032 | y += D_RAD; |
1033 | |
1034 | const static gint offset[][3][2] = { |
1035 | /* left arrow/triangle */ |
1036 | { { -D_TIP+D_LEN, -D_WID }, { -D_LEN, D_WID }, { +D_LEN, D_WID } }, |
1037 | /* right arrow/triangle */ |
1038 | { { +D_TIP-D_LEN, -D_WID }, { +D_LEN, D_WID }, { -D_LEN, D_WID } }, |
1039 | /* top arrow/triangle */ |
1040 | { { -D_WID, -D_TIP+D_LEN }, { D_WID, -D_LEN }, { D_WID, +D_LEN } }, |
1041 | /* bottom arrow/triangle */ |
1042 | { { -D_WID, +D_TIP-D_LEN }, { D_WID, +D_LEN }, { D_WID, -D_LEN } } |
1043 | }; |
1044 | |
1045 | int i; |
1046 | for(i=0;i<4;i++) { |
1047 | cairo_move_to (cr, x + offset[i][0][0], y + offset[i][0][1]); |
1048 | cairo_rel_line_to (cr, offset[i][1][0], offset[i][1][1]); |
1049 | cairo_rel_line_to (cr, offset[i][2][0], offset[i][2][1]); |
1050 | } |
1051 | } |
1052 | #endif |
1053 | |
1054 | #ifdef OSD_GPS_BUTTON |
1055 | /* draw the satellite dish icon in the center of the dpad */ |
1056 | #define GPS_V0 (D_RAD/7) |
1057 | #define GPS_V1 (D_RAD/10) |
1058 | #define GPS_V2 (D_RAD/5) |
1059 | |
1060 | /* draw a satellite receiver dish */ |
1061 | /* this is either drawn in the center of the dpad (if present) */ |
1062 | /* or in the middle of the zoom area */ |
1063 | static void |
1064 | osd_dpad_gps(cairo_t *cr, gint x, gint y) { |
1065 | /* move reference to dpad center */ |
1066 | x += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD * 3; |
1067 | y += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD + GPS_V0; |
1068 | |
1069 | cairo_move_to (cr, x-GPS_V0, y+GPS_V0); |
1070 | cairo_rel_line_to (cr, +GPS_V0, -GPS_V0); |
1071 | cairo_rel_line_to (cr, +GPS_V0, +GPS_V0); |
1072 | cairo_close_path (cr); |
1073 | |
1074 | cairo_move_to (cr, x+GPS_V1-GPS_V2, y-2*GPS_V2); |
1075 | cairo_curve_to (cr, x-GPS_V2, y, x+GPS_V1, y+GPS_V1, x+GPS_V1+GPS_V2, y); |
1076 | cairo_close_path (cr); |
1077 | |
1078 | x += GPS_V1; |
1079 | cairo_move_to (cr, x, y-GPS_V2); |
1080 | cairo_rel_line_to (cr, +GPS_V1, -GPS_V1); |
1081 | } |
1082 | #endif |
1083 | |
1084 | #define Z_LEN (2*Z_RAD/3) |
1085 | |
1086 | static void |
1087 | osd_zoom_labels(cairo_t *cr, gint x, gint y) { |
1088 | cairo_move_to (cr, x + Z_LEFT - Z_LEN, y + Z_MID); |
1089 | cairo_line_to (cr, x + Z_LEFT + Z_LEN, y + Z_MID); |
1090 | |
1091 | cairo_move_to (cr, x + Z_RIGHT, y + Z_MID - Z_LEN); |
1092 | cairo_line_to (cr, x + Z_RIGHT, y + Z_MID + Z_LEN); |
1093 | cairo_move_to (cr, x + Z_RIGHT - Z_LEN, y + Z_MID); |
1094 | cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID); |
1095 | } |
1096 | |
1097 | #ifdef OSD_COORDINATES |
1098 | |
1099 | #ifndef OSD_COORDINATES_FONT_SIZE |
1100 | #define OSD_COORDINATES_FONT_SIZE 12 |
1101 | #endif |
1102 | |
1103 | #define OSD_COORDINATES_OFFSET (OSD_COORDINATES_FONT_SIZE/6) |
1104 | |
1105 | #define OSD_COORDINATES_W (8*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET) |
1106 | #define OSD_COORDINATES_H (2*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET+OSD_COORDINATES_FONT_SIZE/4) |
1107 | |
1108 | /* these can be overwritten with versions that support */ |
1109 | /* localization */ |
1110 | #ifndef OSD_COORDINATES_CHR_N |
1111 | #define OSD_COORDINATES_CHR_N "N" |
1112 | #endif |
1113 | #ifndef OSD_COORDINATES_CHR_S |
1114 | #define OSD_COORDINATES_CHR_S "S" |
1115 | #endif |
1116 | #ifndef OSD_COORDINATES_CHR_E |
1117 | #define OSD_COORDINATES_CHR_E "E" |
1118 | #endif |
1119 | #ifndef OSD_COORDINATES_CHR_W |
1120 | #define OSD_COORDINATES_CHR_W "W" |
1121 | #endif |
1122 | |
1123 | |
1124 | |
1125 | /* this is the classic geocaching notation */ |
1126 | static char |
1127 | *osd_latitude_str(float latitude) { |
1128 | char *c = OSD_COORDINATES_CHR_N; |
1129 | float integral, fractional; |
1130 | |
1131 | if(isnan(latitude)) |
1132 | return NULL; |
1133 | |
1134 | if(latitude < 0) { |
1135 | latitude = fabs(latitude); |
1136 | c = OSD_COORDINATES_CHR_S; |
1137 | } |
1138 | |
1139 | fractional = modff(latitude, &integral); |
1140 | |
1141 | return g_strdup_printf("%s %02d° %06.3f'", |
1142 | c, (int)integral, fractional*60.0); |
1143 | } |
1144 | |
1145 | static char |
1146 | *osd_longitude_str(float longitude) { |
1147 | char *c = OSD_COORDINATES_CHR_E; |
1148 | float integral, fractional; |
1149 | |
1150 | if(isnan(longitude)) |
1151 | return NULL; |
1152 | |
1153 | if(longitude < 0) { |
1154 | longitude = fabs(longitude); |
1155 | c = OSD_COORDINATES_CHR_W; |
1156 | } |
1157 | |
1158 | fractional = modff(longitude, &integral); |
1159 | |
1160 | return g_strdup_printf("%s %03d° %06.3f'", |
1161 | c, (int)integral, fractional*60.0); |
1162 | } |
1163 | |
1164 | /* render a string at the given screen position */ |
1165 | static int |
1166 | osd_render_centered_text(cairo_t *cr, int y, int width, char *text) { |
1167 | char *p = g_strdup(text); |
1168 | cairo_text_extents_t extents; |
1169 | cairo_text_extents (cr, p, &extents); |
1170 | |
1171 | /* check if text needs to be truncated */ |
1172 | int len = strlen(text)-2; |
1173 | while(extents.width > width) { |
1174 | len--; |
1175 | strcpy(p+len, "..."); |
1176 | cairo_text_extents (cr, p, &extents); |
1177 | } |
1178 | |
1179 | cairo_set_source_rgb(cr, 1.0, 1.0, 1.0); |
1180 | cairo_set_line_width (cr, OSD_COORDINATES_FONT_SIZE/6); |
1181 | cairo_move_to (cr, (width - extents.width)/2, y - extents.y_bearing); |
1182 | cairo_text_path (cr, p); |
1183 | cairo_stroke (cr); |
1184 | |
1185 | cairo_set_source_rgb(cr, 0.0, 0.0, 0.0); |
1186 | cairo_move_to (cr, (width - extents.width)/2, y - extents.y_bearing); |
1187 | cairo_show_text (cr, p); |
1188 | |
1189 | g_free(p); |
1190 | |
1191 | /* skip + 1/4 line */ |
1192 | return y + 5*OSD_COORDINATES_FONT_SIZE/4; |
1193 | } |
1194 | |
1195 | static void |
1196 | osd_render_coordinates(osm_gps_map_osd_t *osd) |
1197 | { |
1198 | osd_priv_t *priv = (osd_priv_t*)osd->priv; |
1199 | |
1200 | /* get current map position */ |
1201 | gfloat lat, lon; |
1202 | g_object_get(osd->widget, "latitude", &lat, "longitude", &lon, NULL); |
1203 | |
1204 | /* check if position has changed enough to require redraw */ |
1205 | if(!isnan(priv->coordinates.lat) && !isnan(priv->coordinates.lon)) |
1206 | /* 1/60000 == 1/1000 minute */ |
1207 | if((fabsf(lat - priv->coordinates.lat) < 1/60000) && |
1208 | (fabsf(lon - priv->coordinates.lon) < 1/60000)) |
1209 | return; |
1210 | |
1211 | priv->coordinates.lat = lat; |
1212 | priv->coordinates.lon = lon; |
1213 | |
1214 | /* first fill with transparency */ |
1215 | cairo_t *cr = cairo_create(priv->coordinates.surface); |
1216 | cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE); |
1217 | // cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 0.5); |
1218 | cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0); |
1219 | cairo_paint(cr); |
1220 | cairo_set_operator(cr, CAIRO_OPERATOR_OVER); |
1221 | |
1222 | cairo_select_font_face (cr, "Sans", |
1223 | CAIRO_FONT_SLANT_NORMAL, |
1224 | CAIRO_FONT_WEIGHT_BOLD); |
1225 | cairo_set_font_size (cr, OSD_COORDINATES_FONT_SIZE); |
1226 | |
1227 | char *latitude = osd_latitude_str(lat); |
1228 | char *longitude = osd_longitude_str(lon); |
1229 | |
1230 | int y = OSD_COORDINATES_OFFSET; |
1231 | y = osd_render_centered_text(cr, y, OSD_COORDINATES_W, latitude); |
1232 | y = osd_render_centered_text(cr, y, OSD_COORDINATES_W, longitude); |
1233 | |
1234 | g_free(latitude); |
1235 | g_free(longitude); |
1236 | |
1237 | cairo_destroy(cr); |
1238 | } |
1239 | #endif // OSD_COORDINATES |
1240 | |
1241 | #ifdef OSD_NAV |
1242 | #define OSD_NAV_W (8*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET) |
1243 | #define OSD_NAV_H (11*OSD_COORDINATES_FONT_SIZE) |
1244 | |
1245 | /* http://mathforum.org/library/drmath/view/55417.html */ |
1246 | static float get_bearing(float lat1, float lon1, float lat2, float lon2) { |
1247 | return atan2( sin(lon2 - lon1) * cos(lat2), |
1248 | cos(lat1) * sin(lat2) - |
1249 | sin(lat1) * cos(lat2) * cos(lon2 - lon1)); |
1250 | } |
1251 | |
1252 | /* http://mathforum.org/library/drmath/view/51722.html */ |
1253 | static float get_distance(float lat1, float lon1, float lat2, float lon2) { |
1254 | float aob = acos(cos(lat1) * cos(lat2) * cos(lon2 - lon1) + |
1255 | sin(lat1) * sin(lat2)); |
1256 | |
1257 | // return(aob * 3959.0); /* great circle radius in miles */ |
1258 | |
1259 | return(aob * 6371000.0); /* great circle radius in meters */ |
1260 | } |
1261 | |
1262 | static void |
1263 | osd_render_nav(osm_gps_map_osd_t *osd) |
1264 | { |
1265 | osd_priv_t *priv = (osd_priv_t*)osd->priv; |
1266 | |
1267 | if(!priv->nav.surface || isnan(priv->nav.lat) || isnan(priv->nav.lon)) |
1268 | return; |
1269 | |
1270 | /* first fill with transparency */ |
1271 | cairo_t *cr = cairo_create(priv->nav.surface); |
1272 | cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE); |
1273 | cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0); |
1274 | cairo_paint(cr); |
1275 | cairo_set_operator(cr, CAIRO_OPERATOR_OVER); |
1276 | |
1277 | cairo_select_font_face (cr, "Sans", |
1278 | CAIRO_FONT_SLANT_NORMAL, |
1279 | CAIRO_FONT_WEIGHT_BOLD); |
1280 | cairo_set_font_size (cr, OSD_COORDINATES_FONT_SIZE); |
1281 | |
1282 | char *latitude = osd_latitude_str(priv->nav.lat); |
1283 | char *longitude = osd_longitude_str(priv->nav.lon); |
1284 | |
1285 | int y = OSD_COORDINATES_OFFSET; |
1286 | y = osd_render_centered_text(cr, y, OSD_NAV_W, priv->nav.name); |
1287 | y = osd_render_centered_text(cr, y, OSD_NAV_W, latitude); |
1288 | y = osd_render_centered_text(cr, y, OSD_NAV_W, longitude); |
1289 | |
1290 | g_free(latitude); |
1291 | g_free(longitude); |
1292 | |
1293 | /* draw the compass */ |
1294 | int radius = (OSD_NAV_H - y - 5*OSD_COORDINATES_FONT_SIZE/4)/2; |
1295 | if(radius > OSD_NAV_W/2) |
1296 | radius = OSD_NAV_W/2; |
1297 | |
1298 | int x = OSD_NAV_W/2+1; |
1299 | y += radius; |
1300 | |
1301 | cairo_stroke (cr); |
1302 | |
1303 | /* draw background */ |
1304 | cairo_arc(cr, x, y, radius, 0, 2*M_PI); |
1305 | cairo_set_source_rgba (cr, 1, 1, 1, 0.5); |
1306 | cairo_fill_preserve (cr); |
1307 | cairo_set_source_rgb (cr, 0, 0, 0); |
1308 | cairo_set_line_width (cr, 1); |
1309 | cairo_stroke (cr); |
1310 | |
1311 | /* draw pointer */ |
1312 | #define ARROW_WIDTH 0.3 |
1313 | #define ARROW_LENGTH 0.7 |
1314 | |
1315 | coord_t *gps = osm_gps_map_get_gps (OSM_GPS_MAP(osd->widget)); |
1316 | if(gps) { |
1317 | float arot = get_bearing(gps->rlat, gps->rlon, |
1318 | deg2rad(priv->nav.lat), deg2rad(priv->nav.lon)); |
1319 | |
1320 | cairo_move_to(cr, |
1321 | x + radius * ARROW_LENGTH * sin(arot), |
1322 | y + radius * ARROW_LENGTH * -cos(arot)); |
1323 | |
1324 | cairo_line_to(cr, |
1325 | x + radius * -ARROW_LENGTH * sin(arot+ARROW_WIDTH), |
1326 | y + radius * -ARROW_LENGTH * -cos(arot+ARROW_WIDTH)); |
1327 | |
1328 | cairo_line_to(cr, |
1329 | x + radius * -0.5 * ARROW_LENGTH * sin(arot), |
1330 | y + radius * -0.5 * ARROW_LENGTH * -cos(arot)); |
1331 | |
1332 | cairo_line_to(cr, |
1333 | x + radius * -ARROW_LENGTH * sin(arot-ARROW_WIDTH), |
1334 | y + radius * -ARROW_LENGTH * -cos(arot-ARROW_WIDTH)); |
1335 | |
1336 | cairo_close_path(cr); |
1337 | cairo_set_source_rgb (cr, 0, 0, 0); |
1338 | cairo_fill (cr); |
1339 | |
1340 | y += radius + OSD_COORDINATES_FONT_SIZE/4; |
1341 | |
1342 | float dist = get_distance(gps->rlat, gps->rlon, |
1343 | deg2rad(priv->nav.lat), deg2rad(priv->nav.lon)); |
1344 | |
1345 | char *dist_str = NULL; |
1346 | if(!priv->nav.imperial) { |
1347 | /* metric is easy ... */ |
1348 | if(dist<1000) |
1349 | dist_str = g_strdup_printf("%u m", (int)dist); |
1350 | else |
1351 | dist_str = g_strdup_printf("%.1f km", dist/1000); |
1352 | } else { |
1353 | /* and now the hard part: scale for useful imperial values :-( */ |
1354 | /* try to convert to feet, 1ft == 0.3048 m */ |
1355 | |
1356 | if(dist/(3*0.3048) >= 1760.0) /* more than 1760 yard? */ |
1357 | dist_str = g_strdup_printf("%.1f mi", dist/(0.3048*3*1760.0)); |
1358 | else if(dist/0.3048 >= 100) /* more than 100 feet? */ |
1359 | dist_str = g_strdup_printf("%.1f yd", dist/(0.3048*3)); |
1360 | else |
1361 | dist_str = g_strdup_printf("%.0f ft", dist/0.3048); |
1362 | } |
1363 | |
1364 | y = osd_render_centered_text(cr, y, OSD_NAV_W, dist_str); |
1365 | g_free(dist_str); |
1366 | } |
1367 | |
1368 | cairo_destroy(cr); |
1369 | } |
1370 | |
1371 | void osm_gps_map_osd_clear_nav (OsmGpsMap *map) { |
1372 | g_return_if_fail (OSM_IS_GPS_MAP (map)); |
1373 | |
1374 | osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map); |
1375 | g_return_if_fail (osd); |
1376 | |
1377 | osd_priv_t *priv = (osd_priv_t*)osd->priv; |
1378 | g_return_if_fail (priv); |
1379 | |
1380 | if(priv->nav.surface) { |
1381 | cairo_surface_destroy(priv->nav.surface); |
1382 | priv->nav.surface = NULL; |
1383 | priv->nav.lat = OSM_GPS_MAP_INVALID; |
1384 | priv->nav.lon = OSM_GPS_MAP_INVALID; |
1385 | if(priv->nav.name) g_free(priv->nav.name); |
1386 | } |
1387 | osm_gps_map_redraw(map); |
1388 | } |
1389 | |
1390 | void |
1391 | osm_gps_map_osd_draw_nav (OsmGpsMap *map, gboolean imperial, |
1392 | float latitude, float longitude, char *name) { |
1393 | g_return_if_fail (OSM_IS_GPS_MAP (map)); |
1394 | |
1395 | osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map); |
1396 | g_return_if_fail (osd); |
1397 | |
1398 | osd_priv_t *priv = (osd_priv_t*)osd->priv; |
1399 | g_return_if_fail (priv); |
1400 | |
1401 | osm_gps_map_osd_clear_nav (map); |
1402 | |
1403 | /* allocate balloon surface */ |
1404 | priv->nav.surface = |
1405 | cairo_image_surface_create(CAIRO_FORMAT_ARGB32, |
1406 | OSD_NAV_W+2, OSD_NAV_H+2); |
1407 | |
1408 | priv->nav.lat = latitude; |
1409 | priv->nav.lon = longitude; |
1410 | priv->nav.name = g_strdup(name); |
1411 | priv->nav.imperial = imperial; |
1412 | |
1413 | osd_render_nav(osd); |
1414 | |
1415 | osm_gps_map_redraw(map); |
1416 | } |
1417 | |
1418 | #endif // OSD_NAV |
1419 | |
1420 | |
1421 | #ifdef OSD_CROSSHAIR |
1422 | |
1423 | #ifndef OSD_CROSSHAIR_RADIUS |
1424 | #define OSD_CROSSHAIR_RADIUS 10 |
1425 | #endif |
1426 | |
1427 | #define OSD_CROSSHAIR_TICK (OSD_CROSSHAIR_RADIUS/2) |
1428 | #define OSD_CROSSHAIR_BORDER (OSD_CROSSHAIR_TICK + OSD_CROSSHAIR_RADIUS/4) |
1429 | #define OSD_CROSSHAIR_W ((OSD_CROSSHAIR_RADIUS+OSD_CROSSHAIR_BORDER)*2) |
1430 | #define OSD_CROSSHAIR_H ((OSD_CROSSHAIR_RADIUS+OSD_CROSSHAIR_BORDER)*2) |
1431 | |
1432 | static void |
1433 | osd_render_crosshair_shape(cairo_t *cr) { |
1434 | cairo_arc (cr, OSD_CROSSHAIR_W/2, OSD_CROSSHAIR_H/2, |
1435 | OSD_CROSSHAIR_RADIUS, 0, 2*M_PI); |
1436 | |
1437 | cairo_move_to (cr, OSD_CROSSHAIR_W/2 - OSD_CROSSHAIR_RADIUS, |
1438 | OSD_CROSSHAIR_H/2); |
1439 | cairo_rel_line_to (cr, -OSD_CROSSHAIR_TICK, 0); |
1440 | cairo_move_to (cr, OSD_CROSSHAIR_W/2 + OSD_CROSSHAIR_RADIUS, |
1441 | OSD_CROSSHAIR_H/2); |
1442 | cairo_rel_line_to (cr, OSD_CROSSHAIR_TICK, 0); |
1443 | |
1444 | cairo_move_to (cr, OSD_CROSSHAIR_W/2, |
1445 | OSD_CROSSHAIR_H/2 - OSD_CROSSHAIR_RADIUS); |
1446 | cairo_rel_line_to (cr, 0, -OSD_CROSSHAIR_TICK); |
1447 | cairo_move_to (cr, OSD_CROSSHAIR_W/2, |
1448 | OSD_CROSSHAIR_H/2 + OSD_CROSSHAIR_RADIUS); |
1449 | cairo_rel_line_to (cr, 0, OSD_CROSSHAIR_TICK); |
1450 | |
1451 | cairo_stroke (cr); |
1452 | } |
1453 | |
1454 | static void |
1455 | osd_render_crosshair(osm_gps_map_osd_t *osd) |
1456 | { |
1457 | osd_priv_t *priv = (osd_priv_t*)osd->priv; |
1458 | |
1459 | if(priv->crosshair.rendered) |
1460 | return; |
1461 | |
1462 | priv->crosshair.rendered = TRUE; |
1463 | |
1464 | /* first fill with transparency */ |
1465 | cairo_t *cr = cairo_create(priv->crosshair.surface); |
1466 | cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE); |
1467 | cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0); |
1468 | cairo_paint(cr); |
1469 | cairo_set_operator(cr, CAIRO_OPERATOR_OVER); |
1470 | |
1471 | cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND); |
1472 | |
1473 | cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.5); |
1474 | cairo_set_line_width (cr, OSD_CROSSHAIR_RADIUS/2); |
1475 | osd_render_crosshair_shape(cr); |
1476 | |
1477 | cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.5); |
1478 | cairo_set_line_width (cr, OSD_CROSSHAIR_RADIUS/4); |
1479 | osd_render_crosshair_shape(cr); |
1480 | |
1481 | cairo_destroy(cr); |
1482 | } |
1483 | #endif |
1484 | |
1485 | #ifdef OSD_SCALE |
1486 | |
1487 | #ifndef OSD_SCALE_FONT_SIZE |
1488 | #define OSD_SCALE_FONT_SIZE 12 |
1489 | #endif |
1490 | #define OSD_SCALE_W (10*OSD_SCALE_FONT_SIZE) |
1491 | #define OSD_SCALE_H (5*OSD_SCALE_FONT_SIZE/2) |
1492 | |
1493 | /* various parameters used to create the scale */ |
1494 | #define OSD_SCALE_H2 (OSD_SCALE_H/2) |
1495 | #define OSD_SCALE_TICK (2*OSD_SCALE_FONT_SIZE/3) |
1496 | #define OSD_SCALE_M (OSD_SCALE_H2 - OSD_SCALE_TICK) |
1497 | #define OSD_SCALE_I (OSD_SCALE_H2 + OSD_SCALE_TICK) |
1498 | #define OSD_SCALE_FD (OSD_SCALE_FONT_SIZE/4) |
1499 | |
1500 | static void |
1501 | osd_render_scale(osm_gps_map_osd_t *osd) |
1502 | { |
1503 | osd_priv_t *priv = (osd_priv_t*)osd->priv; |
1504 | |
1505 | /* this only needs to be rendered if the zoom has changed */ |
1506 | gint zoom; |
1507 | g_object_get(OSM_GPS_MAP(osd->widget), "zoom", &zoom, NULL); |
1508 | if(zoom == priv->scale.zoom) |
1509 | return; |
1510 | |
1511 | priv->scale.zoom = zoom; |
1512 | |
1513 | float m_per_pix = osm_gps_map_get_scale(OSM_GPS_MAP(osd->widget)); |
1514 | |
1515 | /* first fill with transparency */ |
1516 | cairo_t *cr = cairo_create(priv->scale.surface); |
1517 | cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE); |
1518 | cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0); |
1519 | // pink for testing: cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.2); |
1520 | cairo_paint(cr); |
1521 | cairo_set_operator(cr, CAIRO_OPERATOR_OVER); |
1522 | |
1523 | /* determine the size of the scale width in meters */ |
1524 | float width = (OSD_SCALE_W-OSD_SCALE_FONT_SIZE/6) * m_per_pix; |
1525 | |
1526 | /* scale this to useful values */ |
1527 | int exp = logf(width)*M_LOG10E; |
1528 | int mant = width/pow(10,exp); |
1529 | int width_metric = mant * pow(10,exp); |
1530 | char *dist_str = NULL; |
1531 | if(width_metric<1000) |
1532 | dist_str = g_strdup_printf("%u m", width_metric); |
1533 | else |
1534 | dist_str = g_strdup_printf("%u km", width_metric/1000); |
1535 | width_metric /= m_per_pix; |
1536 | |
1537 | /* and now the hard part: scale for useful imperial values :-( */ |
1538 | /* try to convert to feet, 1ft == 0.3048 m */ |
1539 | width /= 0.3048; |
1540 | float imp_scale = 0.3048; |
1541 | char *dist_imp_unit = "ft"; |
1542 | |
1543 | if(width >= 100) { |
1544 | /* 1yd == 3 feet */ |
1545 | width /= 3.0; |
1546 | imp_scale *= 3.0; |
1547 | dist_imp_unit = "yd"; |
1548 | |
1549 | if(width >= 1760.0) { |
1550 | /* 1mi == 1760 yd */ |
1551 | width /= 1760.0; |
1552 | imp_scale *= 1760.0; |
1553 | dist_imp_unit = "mi"; |
1554 | } |
1555 | } |
1556 | |
1557 | /* also convert this to full tens/hundreds */ |
1558 | exp = logf(width)*M_LOG10E; |
1559 | mant = width/pow(10,exp); |
1560 | int width_imp = mant * pow(10,exp); |
1561 | char *dist_str_imp = g_strdup_printf("%u %s", width_imp, dist_imp_unit); |
1562 | |
1563 | /* convert back to pixels */ |
1564 | width_imp *= imp_scale; |
1565 | width_imp /= m_per_pix; |
1566 | |
1567 | cairo_select_font_face (cr, "Sans", |
1568 | CAIRO_FONT_SLANT_NORMAL, |
1569 | CAIRO_FONT_WEIGHT_BOLD); |
1570 | cairo_set_font_size (cr, OSD_SCALE_FONT_SIZE); |
1571 | cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0); |
1572 | |
1573 | cairo_text_extents_t extents; |
1574 | cairo_text_extents (cr, dist_str, &extents); |
1575 | |
1576 | cairo_set_source_rgb(cr, 1.0, 1.0, 1.0); |
1577 | cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/6); |
1578 | cairo_move_to (cr, 2*OSD_SCALE_FD, OSD_SCALE_H2-OSD_SCALE_FD); |
1579 | cairo_text_path (cr, dist_str); |
1580 | cairo_stroke (cr); |
1581 | cairo_move_to (cr, 2*OSD_SCALE_FD, |
1582 | OSD_SCALE_H2+OSD_SCALE_FD + extents.height); |
1583 | cairo_text_path (cr, dist_str_imp); |
1584 | cairo_stroke (cr); |
1585 | |
1586 | cairo_set_source_rgb(cr, 0.0, 0.0, 0.0); |
1587 | cairo_move_to (cr, 2*OSD_SCALE_FD, OSD_SCALE_H2-OSD_SCALE_FD); |
1588 | cairo_show_text (cr, dist_str); |
1589 | cairo_move_to (cr, 2*OSD_SCALE_FD, |
1590 | OSD_SCALE_H2+OSD_SCALE_FD + extents.height); |
1591 | cairo_show_text (cr, dist_str_imp); |
1592 | |
1593 | g_free(dist_str); |
1594 | g_free(dist_str_imp); |
1595 | |
1596 | /* draw white line */ |
1597 | cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND); |
1598 | cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 1.0); |
1599 | cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/3); |
1600 | cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_M); |
1601 | cairo_rel_line_to (cr, 0, OSD_SCALE_TICK); |
1602 | cairo_rel_line_to (cr, width_metric, 0); |
1603 | cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK); |
1604 | cairo_stroke(cr); |
1605 | cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_I); |
1606 | cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK); |
1607 | cairo_rel_line_to (cr, width_imp, 0); |
1608 | cairo_rel_line_to (cr, 0, +OSD_SCALE_TICK); |
1609 | cairo_stroke(cr); |
1610 | |
1611 | /* draw black line */ |
1612 | cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0); |
1613 | cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/6); |
1614 | cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_M); |
1615 | cairo_rel_line_to (cr, 0, OSD_SCALE_TICK); |
1616 | cairo_rel_line_to (cr, width_metric, 0); |
1617 | cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK); |
1618 | cairo_stroke(cr); |
1619 | cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_I); |
1620 | cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK); |
1621 | cairo_rel_line_to (cr, width_imp, 0); |
1622 | cairo_rel_line_to (cr, 0, +OSD_SCALE_TICK); |
1623 | cairo_stroke(cr); |
1624 | |
1625 | cairo_destroy(cr); |
1626 | } |
1627 | #endif |
1628 | |
1629 | static void |
1630 | osd_render_controls(osm_gps_map_osd_t *osd) |
1631 | { |
1632 | osd_priv_t *priv = (osd_priv_t*)osd->priv; |
1633 | |
1634 | if(priv->controls.rendered |
1635 | #ifdef OSD_GPS_BUTTON |
1636 | && (priv->controls.gps_enabled == (osd->cb != NULL)) |
1637 | #endif |
1638 | ) |
1639 | return; |
1640 | |
1641 | #ifdef OSD_GPS_BUTTON |
1642 | priv->controls.gps_enabled = (osd->cb != NULL); |
1643 | #endif |
1644 | priv->controls.rendered = TRUE; |
1645 | |
1646 | #ifndef OSD_COLOR |
1647 | GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL]; |
1648 | GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL]; |
1649 | GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE]; |
1650 | #endif |
1651 | |
1652 | /* first fill with transparency */ |
1653 | cairo_t *cr = cairo_create(priv->controls.surface); |
1654 | cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE); |
1655 | cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0); |
1656 | cairo_paint(cr); |
1657 | cairo_set_operator(cr, CAIRO_OPERATOR_OVER); |
1658 | |
1659 | /* --------- draw zoom and dpad shape shadow ----------- */ |
1660 | #ifdef OSD_SHADOW_ENABLE |
1661 | osd_zoom_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW); |
1662 | osd_shape_shadow(cr); |
1663 | #ifndef OSD_NO_DPAD |
1664 | osd_dpad_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW); |
1665 | osd_shape_shadow(cr); |
1666 | #endif |
1667 | #endif |
1668 | |
1669 | /* --------- draw zoom and dpad shape ----------- */ |
1670 | |
1671 | osd_zoom_shape(cr, 1, 1); |
1672 | #ifndef OSD_COLOR |
1673 | osd_shape(cr, &bg, &fg); |
1674 | #else |
1675 | osd_shape(cr); |
1676 | #endif |
1677 | #ifndef OSD_NO_DPAD |
1678 | osd_dpad_shape(cr, 1, 1); |
1679 | #ifndef OSD_COLOR |
1680 | osd_shape(cr, &bg, &fg); |
1681 | #else |
1682 | osd_shape(cr); |
1683 | #endif |
1684 | #endif |
1685 | |
1686 | /* --------- draw zoom and dpad labels --------- */ |
1687 | |
1688 | #ifdef OSD_SHADOW_ENABLE |
1689 | osd_labels_shadow(cr, Z_RAD/3, TRUE); |
1690 | osd_zoom_labels(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW); |
1691 | #ifndef OSD_NO_DPAD |
1692 | osd_dpad_labels(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW); |
1693 | #endif |
1694 | cairo_stroke(cr); |
1695 | #ifdef OSD_GPS_BUTTON |
1696 | osd_labels_shadow(cr, Z_RAD/6, osd->cb != NULL); |
1697 | osd_dpad_gps(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW); |
1698 | cairo_stroke(cr); |
1699 | #endif |
1700 | #endif |
1701 | |
1702 | #ifndef OSD_COLOR |
1703 | osd_labels(cr, Z_RAD/3, TRUE, &fg, &da); |
1704 | #else |
1705 | osd_labels(cr, Z_RAD/3, TRUE); |
1706 | #endif |
1707 | osd_zoom_labels(cr, 1, 1); |
1708 | #ifndef OSD_NO_DPAD |
1709 | osd_dpad_labels(cr, 1, 1); |
1710 | #endif |
1711 | cairo_stroke(cr); |
1712 | |
1713 | #ifndef OSD_COLOR |
1714 | osd_labels(cr, Z_RAD/6, osd->cb != NULL, &fg, &da); |
1715 | #else |
1716 | osd_labels(cr, Z_RAD/6, osd->cb != NULL); |
1717 | #endif |
1718 | #ifdef OSD_GPS_BUTTON |
1719 | osd_dpad_gps(cr, 1, 1); |
1720 | #endif |
1721 | cairo_stroke(cr); |
1722 | |
1723 | cairo_destroy(cr); |
1724 | } |
1725 | |
1726 | static void |
1727 | osd_render(osm_gps_map_osd_t *osd) |
1728 | { |
1729 | /* this function is actually called pretty often since the */ |
1730 | /* OSD contents may have changed (due to a coordinate/zoom change). */ |
1731 | /* The different OSD parts have to make sure that they don't */ |
1732 | /* render unneccessarily often and thus waste CPU power */ |
1733 | |
1734 | osd_render_controls(osd); |
1735 | |
1736 | #ifdef OSD_SOURCE_SEL |
1737 | osd_render_source_sel(osd, FALSE); |
1738 | #endif |
1739 | |
1740 | #ifdef OSD_SCALE |
1741 | osd_render_scale(osd); |
1742 | #endif |
1743 | |
1744 | #ifdef OSD_CROSSHAIR |
1745 | osd_render_crosshair(osd); |
1746 | #endif |
1747 | |
1748 | #ifdef OSD_NAV |
1749 | osd_render_nav(osd); |
1750 | #endif |
1751 | |
1752 | #ifdef OSD_COORDINATES |
1753 | osd_render_coordinates(osd); |
1754 | #endif |
1755 | } |
1756 | |
1757 | static void |
1758 | osd_draw(osm_gps_map_osd_t *osd, GdkDrawable *drawable) |
1759 | { |
1760 | osd_priv_t *priv = (osd_priv_t*)osd->priv; |
1761 | |
1762 | /* OSD itself uses some off-screen rendering, so check if the */ |
1763 | /* offscreen buffer is present and create it if not */ |
1764 | if(!priv->controls.surface) { |
1765 | /* create overlay ... */ |
1766 | priv->controls.surface = |
1767 | cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W+2, OSD_H+2); |
1768 | |
1769 | priv->controls.rendered = FALSE; |
1770 | #ifdef OSD_GPS_BUTTON |
1771 | priv->controls.gps_enabled = FALSE; |
1772 | #endif |
1773 | |
1774 | #ifdef OSD_SOURCE_SEL |
1775 | /* the initial OSD state is alway not-expanded */ |
1776 | priv->source_sel.surface = |
1777 | cairo_image_surface_create(CAIRO_FORMAT_ARGB32, |
1778 | OSD_S_W+2, OSD_S_H+2); |
1779 | priv->source_sel.rendered = FALSE; |
1780 | #endif |
1781 | |
1782 | #ifdef OSD_SCALE |
1783 | priv->scale.surface = |
1784 | cairo_image_surface_create(CAIRO_FORMAT_ARGB32, |
1785 | OSD_SCALE_W, OSD_SCALE_H); |
1786 | priv->scale.zoom = -1; |
1787 | #endif |
1788 | |
1789 | #ifdef OSD_CROSSHAIR |
1790 | priv->crosshair.surface = |
1791 | cairo_image_surface_create(CAIRO_FORMAT_ARGB32, |
1792 | OSD_CROSSHAIR_W, OSD_CROSSHAIR_H); |
1793 | priv->crosshair.rendered = FALSE; |
1794 | #endif |
1795 | |
1796 | #ifdef OSD_COORDINATES |
1797 | priv->coordinates.surface = |
1798 | cairo_image_surface_create(CAIRO_FORMAT_ARGB32, |
1799 | OSD_COORDINATES_W, OSD_COORDINATES_H); |
1800 | |
1801 | priv->coordinates.lat = priv->coordinates.lon = OSM_GPS_MAP_INVALID; |
1802 | #endif |
1803 | |
1804 | /* ... and render it */ |
1805 | osd_render(osd); |
1806 | } |
1807 | |
1808 | // now draw this onto the original context |
1809 | cairo_t *cr = gdk_cairo_create(drawable); |
1810 | |
1811 | gint x, y; |
1812 | |
1813 | #ifdef OSD_SCALE |
1814 | x = OSD_X; |
1815 | y = -OSD_Y; |
1816 | if(x < 0) x += osd->widget->allocation.width - OSD_SCALE_W; |
1817 | if(y < 0) y += osd->widget->allocation.height - OSD_SCALE_H; |
1818 | |
1819 | cairo_set_source_surface(cr, priv->scale.surface, x, y); |
1820 | cairo_paint(cr); |
1821 | #endif |
1822 | |
1823 | #ifdef OSD_CROSSHAIR |
1824 | x = (osd->widget->allocation.width - OSD_CROSSHAIR_W)/2; |
1825 | y = (osd->widget->allocation.height - OSD_CROSSHAIR_H)/2; |
1826 | |
1827 | cairo_set_source_surface(cr, priv->crosshair.surface, x, y); |
1828 | cairo_paint(cr); |
1829 | #endif |
1830 | |
1831 | #ifdef OSD_NAV |
1832 | if(priv->nav.surface) { |
1833 | x = OSD_X; |
1834 | if(x < 0) x += osd->widget->allocation.width - OSD_NAV_W; |
1835 | y = (osd->widget->allocation.height - OSD_NAV_H)/2; |
1836 | |
1837 | cairo_set_source_surface(cr, priv->nav.surface, x, y); |
1838 | cairo_paint(cr); |
1839 | } |
1840 | #endif |
1841 | |
1842 | #ifdef OSD_COORDINATES |
1843 | x = -OSD_X; |
1844 | y = -OSD_Y; |
1845 | if(x < 0) x += osd->widget->allocation.width - OSD_COORDINATES_W; |
1846 | if(y < 0) y += osd->widget->allocation.height - OSD_COORDINATES_H; |
1847 | |
1848 | cairo_set_source_surface(cr, priv->coordinates.surface, x, y); |
1849 | cairo_paint(cr); |
1850 | #endif |
1851 | |
1852 | #ifdef OSD_BALLOON |
1853 | if(priv->balloon.surface) { |
1854 | |
1855 | /* convert given lat lon into screen coordinates */ |
1856 | gint x, y; |
1857 | osm_gps_map_geographic_to_screen (OSM_GPS_MAP(osd->widget), |
1858 | priv->balloon.lat, priv->balloon.lon, |
1859 | &x, &y); |
1860 | |
1861 | /* check if balloon needs to be rerendered */ |
1862 | osd_render_balloon(osd); |
1863 | |
1864 | cairo_set_source_surface(cr, priv->balloon.surface, |
1865 | x + priv->balloon.offset_x, |
1866 | y + priv->balloon.offset_y); |
1867 | cairo_paint(cr); |
1868 | } |
1869 | #endif |
1870 | |
1871 | x = OSD_X; |
1872 | if(x < 0) |
1873 | x += osd->widget->allocation.width - OSD_W; |
1874 | |
1875 | y = OSD_Y; |
1876 | if(y < 0) |
1877 | y += osd->widget->allocation.height - OSD_H; |
1878 | |
1879 | cairo_set_source_surface(cr, priv->controls.surface, x, y); |
1880 | cairo_paint(cr); |
1881 | |
1882 | #ifdef OSD_SOURCE_SEL |
1883 | if(!priv->source_sel.handler_id) { |
1884 | /* the OSD source selection is not being animated */ |
1885 | if(!priv->source_sel.expanded) |
1886 | x = osd->widget->allocation.width - OSD_S_W; |
1887 | else |
1888 | x = osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X; |
1889 | } else |
1890 | x = priv->source_sel.shift; |
1891 | |
1892 | y = OSD_S_Y; |
1893 | if(OSD_S_Y < 0) { |
1894 | if(!priv->source_sel.expanded) |
1895 | y = osd->widget->allocation.height - OSD_S_H + OSD_S_Y; |
1896 | else |
1897 | y = osd->widget->allocation.height - OSD_S_EXP_H + OSD_S_Y; |
1898 | } |
1899 | |
1900 | cairo_set_source_surface(cr, priv->source_sel.surface, x, y); |
1901 | cairo_paint(cr); |
1902 | #endif |
1903 | |
1904 | cairo_destroy(cr); |
1905 | } |
1906 | |
1907 | static void |
1908 | osd_free(osm_gps_map_osd_t *osd) |
1909 | { |
1910 | osd_priv_t *priv = (osd_priv_t *)(osd->priv); |
1911 | |
1912 | if (priv->controls.surface) |
1913 | cairo_surface_destroy(priv->controls.surface); |
1914 | |
1915 | #ifdef OSD_SOURCE_SEL |
1916 | if(priv->source_sel.handler_id) |
1917 | gtk_timeout_remove(priv->source_sel.handler_id); |
1918 | |
1919 | if (priv->source_sel.surface) |
1920 | cairo_surface_destroy(priv->source_sel.surface); |
1921 | #endif |
1922 | |
1923 | #ifdef OSD_SCALE |
1924 | if (priv->scale.surface) |
1925 | cairo_surface_destroy(priv->scale.surface); |
1926 | #endif |
1927 | |
1928 | #ifdef OSD_CROSSHAIR |
1929 | if (priv->crosshair.surface) |
1930 | cairo_surface_destroy(priv->crosshair.surface); |
1931 | #endif |
1932 | |
1933 | #ifdef OSD_NAV |
1934 | if (priv->nav.surface) |
1935 | cairo_surface_destroy(priv->nav.surface); |
1936 | #endif |
1937 | |
1938 | #ifdef OSD_COORDINATES |
1939 | if (priv->coordinates.surface) |
1940 | cairo_surface_destroy(priv->coordinates.surface); |
1941 | #endif |
1942 | |
1943 | #ifdef OSD_BALLOON |
1944 | if (priv->balloon.surface) |
1945 | cairo_surface_destroy(priv->balloon.surface); |
1946 | #endif |
1947 | |
1948 | g_free(priv); |
1949 | } |
1950 | |
1951 | static gboolean |
1952 | osd_busy(osm_gps_map_osd_t *osd) |
1953 | { |
1954 | #ifdef OSD_SOURCE_SEL |
1955 | osd_priv_t *priv = (osd_priv_t *)(osd->priv); |
1956 | return (priv->source_sel.handler_id != 0); |
1957 | #else |
1958 | return FALSE; |
1959 | #endif |
1960 | } |
1961 | |
1962 | static osd_button_t |
1963 | osd_check(osm_gps_map_osd_t *osd, gboolean down, gint x, gint y) { |
1964 | return osd_check_int(osd, TRUE, down, x, y); |
1965 | } |
1966 | |
1967 | static osm_gps_map_osd_t osd_classic = { |
1968 | .widget = NULL, |
1969 | |
1970 | .draw = osd_draw, |
1971 | .check = osd_check, |
1972 | .render = osd_render, |
1973 | .free = osd_free, |
1974 | .busy = osd_busy, |
1975 | |
1976 | .cb = NULL, |
1977 | .data = NULL, |
1978 | |
1979 | .priv = NULL |
1980 | }; |
1981 | |
1982 | /* this is the only function that's externally visible */ |
1983 | void |
1984 | osm_gps_map_osd_classic_init(OsmGpsMap *map) |
1985 | { |
1986 | osd_priv_t *priv = osd_classic.priv = g_new0(osd_priv_t, 1); |
1987 | |
1988 | #ifdef OSD_BALLOON |
1989 | priv->balloon.lat = OSM_GPS_MAP_INVALID; |
1990 | priv->balloon.lon = OSM_GPS_MAP_INVALID; |
1991 | #endif |
1992 | |
1993 | osd_classic.priv = priv; |
1994 | |
1995 | osm_gps_map_register_osd(map, &osd_classic); |
1996 | } |
1997 | |
1998 | #ifdef OSD_GPS_BUTTON |
1999 | /* below are osd specific functions which aren't used by osm-gps-map */ |
2000 | /* but instead are to be used by the main application */ |
2001 | void osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdCallback cb, |
2002 | gpointer data) { |
2003 | osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map); |
2004 | g_return_if_fail (osd); |
2005 | |
2006 | osd->cb = cb; |
2007 | osd->data = data; |
2008 | |
2009 | /* this may have changed the state of the gps button */ |
2010 | /* we thus re-render the overlay */ |
2011 | osd->render(osd); |
2012 | |
2013 | osm_gps_map_redraw(map); |
2014 | } |
2015 | #endif |
2016 | |
2017 | osd_button_t |
2018 | osm_gps_map_osd_check(OsmGpsMap *map, gint x, gint y) { |
2019 | osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map); |
2020 | g_return_val_if_fail (osd, OSD_NONE); |
2021 | |
2022 | return osd_check_int(osd, FALSE, TRUE, x, y); |
2023 | } |