Parent Directory | Revision Log
osm-map path, gps etc. adjustements
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 |
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 "osm-gps-map-osd-classic.h" |
36 | |
37 | //the osd controls |
38 | typedef struct { |
39 | /* the offscreen representation of the OSD */ |
40 | cairo_surface_t *overlay; |
41 | } osd_priv_t; |
42 | |
43 | /* position and extent of bounding box */ |
44 | #ifndef OSD_X |
45 | #define OSD_X (10) |
46 | #endif |
47 | |
48 | #ifndef OSD_Y |
49 | #define OSD_Y (10) |
50 | #endif |
51 | |
52 | /* parameters of the direction shape */ |
53 | #ifndef OSD_DIAMETER |
54 | #define D_RAD (30) // diameter of dpad |
55 | #else |
56 | #define D_RAD (OSD_DIAMETER) |
57 | #endif |
58 | #define D_TIP (4*D_RAD/5) // distance of arrow tip from dpad center |
59 | #define D_LEN (D_RAD/4) // length of arrow |
60 | #define D_WID (D_LEN) // width of arrow |
61 | |
62 | /* parameters of the "zoom" pad */ |
63 | #define Z_STEP (D_RAD/4) // distance between dpad and zoom |
64 | #define Z_RAD (D_RAD/2) // radius of "caps" of zoom bar |
65 | |
66 | #ifdef OSD_SHADOW_ENABLE |
67 | /* shadow also depends on control size */ |
68 | #define OSD_SHADOW (D_RAD/6) |
69 | #else |
70 | #define OSD_SHADOW (0) |
71 | #endif |
72 | |
73 | /* normally the GPS button is in the center of the dpad. if there's */ |
74 | /* no dpad it will go into the zoom area */ |
75 | #if defined(OSD_GPS_BUTTON) && defined(OSD_NO_DPAD) |
76 | #define Z_GPS 1 |
77 | #else |
78 | #define Z_GPS 0 |
79 | #endif |
80 | |
81 | /* total width and height of controls incl. shadow */ |
82 | #define OSD_W (2*D_RAD + OSD_SHADOW + Z_GPS * 2 * Z_RAD) |
83 | #if !Z_GPS |
84 | #define OSD_H (2*D_RAD + Z_STEP + 2*Z_RAD + OSD_SHADOW) |
85 | #else |
86 | #define OSD_H (2*Z_RAD + OSD_SHADOW) |
87 | #endif |
88 | |
89 | #ifdef OSD_SHADOW_ENABLE |
90 | #define OSD_LBL_SHADOW (OSD_SHADOW/2) |
91 | #endif |
92 | |
93 | #define Z_TOP ((1-Z_GPS) * (2 * D_RAD + Z_STEP)) |
94 | |
95 | #define Z_MID (Z_TOP + Z_RAD) |
96 | #define Z_BOT (Z_MID + Z_RAD) |
97 | #define Z_LEFT (Z_RAD) |
98 | #define Z_RIGHT (2 * D_RAD - Z_RAD + Z_GPS * 2 * Z_RAD) |
99 | #define Z_CENTER ((Z_RIGHT + Z_LEFT)/2) |
100 | |
101 | /* create the cairo shape used for the zoom buttons */ |
102 | static void |
103 | osm_gps_map_osd_zoom_shape(cairo_t *cr, gint x, gint y) |
104 | { |
105 | cairo_move_to (cr, x+Z_LEFT, y+Z_TOP); |
106 | cairo_line_to (cr, x+Z_RIGHT, y+Z_TOP); |
107 | cairo_arc (cr, x+Z_RIGHT, y+Z_MID, Z_RAD, -M_PI/2, M_PI/2); |
108 | cairo_line_to (cr, x+Z_LEFT, y+Z_BOT); |
109 | cairo_arc (cr, x+Z_LEFT, y+Z_MID, Z_RAD, M_PI/2, -M_PI/2); |
110 | } |
111 | |
112 | #ifndef OSD_NO_DPAD |
113 | /* create the cairo shape used for the dpad */ |
114 | static void |
115 | osm_gps_map_osd_dpad_shape(cairo_t *cr, gint x, gint y) |
116 | { |
117 | cairo_arc (cr, x+D_RAD, y+D_RAD, D_RAD, 0, 2 * M_PI); |
118 | } |
119 | #endif |
120 | |
121 | static gboolean |
122 | osm_gps_map_in_circle(gint x, gint y, gint cx, gint cy, gint rad) |
123 | { |
124 | return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad); |
125 | } |
126 | |
127 | #ifndef OSD_NO_DPAD |
128 | /* check whether x/y is within the dpad */ |
129 | static osd_button_t |
130 | osm_gps_map_osd_check_dpad(gint x, gint y) |
131 | { |
132 | /* within entire dpad circle */ |
133 | if( osm_gps_map_in_circle(x, y, D_RAD, D_RAD, D_RAD)) |
134 | { |
135 | /* convert into position relative to dpads centre */ |
136 | x -= D_RAD; |
137 | y -= D_RAD; |
138 | |
139 | #ifdef OSD_GPS_BUTTON |
140 | /* check for dpad center goes here! */ |
141 | if( osm_gps_map_in_circle(x, y, 0, 0, D_RAD/3)) |
142 | return OSD_GPS; |
143 | #endif |
144 | |
145 | if( y < 0 && abs(x) < abs(y)) |
146 | return OSD_UP; |
147 | |
148 | if( y > 0 && abs(x) < abs(y)) |
149 | return OSD_DOWN; |
150 | |
151 | if( x < 0 && abs(y) < abs(x)) |
152 | return OSD_LEFT; |
153 | |
154 | if( x > 0 && abs(y) < abs(x)) |
155 | return OSD_RIGHT; |
156 | |
157 | return OSD_BG; |
158 | } |
159 | return OSD_NONE; |
160 | } |
161 | #endif |
162 | |
163 | /* check whether x/y is within the zoom pads */ |
164 | static osd_button_t |
165 | osm_gps_map_osd_check_zoom(gint x, gint y) { |
166 | if( x > 0 && x < OSD_W && y > Z_TOP && y < Z_BOT) { |
167 | |
168 | /* within circle around (-) label */ |
169 | if( osm_gps_map_in_circle(x, y, Z_LEFT, Z_MID, Z_RAD)) |
170 | return OSD_OUT; |
171 | |
172 | /* within circle around (+) label */ |
173 | if( osm_gps_map_in_circle(x, y, Z_RIGHT, Z_MID, Z_RAD)) |
174 | return OSD_IN; |
175 | |
176 | #if Z_GPS == 1 |
177 | /* within square around center */ |
178 | if( x > Z_CENTER - Z_RAD && x < Z_CENTER + Z_RAD) |
179 | return OSD_GPS; |
180 | #endif |
181 | |
182 | /* between center of (-) button and center of entire zoom control area */ |
183 | if(x > OSD_LEFT && x < D_RAD) |
184 | return OSD_OUT; |
185 | |
186 | /* between center of (+) button and center of entire zoom control area */ |
187 | if(x < OSD_RIGHT && x > D_RAD) |
188 | return OSD_IN; |
189 | } |
190 | |
191 | return OSD_NONE; |
192 | } |
193 | |
194 | static osd_button_t |
195 | osm_gps_map_osd_check(osm_gps_map_osd_t *osd, gint x, gint y) { |
196 | osd_button_t but = OSD_NONE; |
197 | |
198 | x -= OSD_X; |
199 | y -= OSD_Y; |
200 | |
201 | if(OSD_X < 0) |
202 | x -= (osd->widget->allocation.width - OSD_W); |
203 | |
204 | if(OSD_Y < 0) |
205 | y -= (osd->widget->allocation.height - OSD_H); |
206 | |
207 | /* first do a rough test for the OSD area. */ |
208 | /* this is just to avoid an unnecessary detailed test */ |
209 | if(x > 0 && x < OSD_W && y > 0 && y < OSD_H) { |
210 | #ifndef OSD_NO_DPAD |
211 | but = osm_gps_map_osd_check_dpad(x, y); |
212 | #endif |
213 | |
214 | if(but == OSD_NONE) |
215 | but = osm_gps_map_osd_check_zoom(x, y); |
216 | } |
217 | |
218 | return but; |
219 | } |
220 | |
221 | #ifdef OSD_SHADOW_ENABLE |
222 | static void |
223 | osm_gps_map_osd_shape_shadow(cairo_t *cr) { |
224 | cairo_set_source_rgba (cr, 0, 0, 0, 0.2); |
225 | cairo_fill (cr); |
226 | cairo_stroke (cr); |
227 | } |
228 | #endif |
229 | |
230 | #ifndef OSD_COLOR |
231 | /* if no color has been specified we just use the gdks default colors */ |
232 | static void |
233 | osm_gps_map_osd_shape(cairo_t *cr, GdkColor *bg, GdkColor *fg) { |
234 | gdk_cairo_set_source_color(cr, bg); |
235 | cairo_fill_preserve (cr); |
236 | gdk_cairo_set_source_color(cr, fg); |
237 | cairo_set_line_width (cr, 1); |
238 | cairo_stroke (cr); |
239 | } |
240 | #else |
241 | static void |
242 | osm_gps_map_osd_shape(cairo_t *cr) { |
243 | cairo_set_source_rgb (cr, OSD_COLOR_BG); |
244 | cairo_fill_preserve (cr); |
245 | cairo_set_source_rgb (cr, OSD_COLOR); |
246 | cairo_set_line_width (cr, 1); |
247 | cairo_stroke (cr); |
248 | } |
249 | #endif |
250 | |
251 | #ifndef OSD_NO_DPAD |
252 | static void |
253 | osm_gps_map_osd_dpad_labels(cairo_t *cr, gint x, gint y) { |
254 | /* move reference to dpad center */ |
255 | x += D_RAD; |
256 | y += D_RAD; |
257 | |
258 | const static gint offset[][3][2] = { |
259 | /* left arrow/triangle */ |
260 | { { -D_TIP+D_LEN, -D_WID }, { -D_LEN, D_WID }, { +D_LEN, D_WID } }, |
261 | /* right arrow/triangle */ |
262 | { { +D_TIP-D_LEN, -D_WID }, { +D_LEN, D_WID }, { -D_LEN, D_WID } }, |
263 | /* top arrow/triangle */ |
264 | { { -D_WID, -D_TIP+D_LEN }, { D_WID, -D_LEN }, { D_WID, +D_LEN } }, |
265 | /* bottom arrow/triangle */ |
266 | { { -D_WID, +D_TIP-D_LEN }, { D_WID, +D_LEN }, { D_WID, -D_LEN } } |
267 | }; |
268 | |
269 | int i; |
270 | for(i=0;i<4;i++) { |
271 | cairo_move_to (cr, x + offset[i][0][0], y + offset[i][0][1]); |
272 | cairo_rel_line_to (cr, offset[i][1][0], offset[i][1][1]); |
273 | cairo_rel_line_to (cr, offset[i][2][0], offset[i][2][1]); |
274 | } |
275 | } |
276 | #endif |
277 | |
278 | #ifdef OSD_GPS_BUTTON |
279 | /* draw the satellite dish icon in the center of the dpad */ |
280 | #define GPS_V0 (D_RAD/7) |
281 | #define GPS_V1 (D_RAD/10) |
282 | #define GPS_V2 (D_RAD/5) |
283 | |
284 | /* draw a satellite receiver dish */ |
285 | /* this is either drawn in the center of the dpad (if present) */ |
286 | /* or in the middle of the zoom area */ |
287 | static void |
288 | osm_gps_map_osd_dpad_gps(cairo_t *cr, gint x, gint y) { |
289 | /* move reference to dpad center */ |
290 | x += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD * 3; |
291 | y += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD + GPS_V0; |
292 | |
293 | cairo_move_to (cr, x-GPS_V0, y+GPS_V0); |
294 | cairo_rel_line_to (cr, +GPS_V0, -GPS_V0); |
295 | cairo_rel_line_to (cr, +GPS_V0, +GPS_V0); |
296 | cairo_close_path (cr); |
297 | |
298 | cairo_move_to (cr, x+GPS_V1-GPS_V2, y-2*GPS_V2); |
299 | cairo_curve_to (cr, x-GPS_V2, y, x+GPS_V1, y+GPS_V1, x+GPS_V1+GPS_V2, y); |
300 | cairo_close_path (cr); |
301 | |
302 | x += GPS_V1; |
303 | cairo_move_to (cr, x, y-GPS_V2); |
304 | cairo_rel_line_to (cr, +GPS_V1, -GPS_V1); |
305 | } |
306 | #endif |
307 | |
308 | #define Z_LEN (2*Z_RAD/3) |
309 | |
310 | static void |
311 | osm_gps_map_osd_zoom_labels(cairo_t *cr, gint x, gint y) { |
312 | cairo_move_to (cr, x + Z_LEFT - Z_LEN, y + Z_MID); |
313 | cairo_line_to (cr, x + Z_LEFT + Z_LEN, y + Z_MID); |
314 | |
315 | cairo_move_to (cr, x + Z_RIGHT, y + Z_MID - Z_LEN); |
316 | cairo_line_to (cr, x + Z_RIGHT, y + Z_MID + Z_LEN); |
317 | cairo_move_to (cr, x + Z_RIGHT - Z_LEN, y + Z_MID); |
318 | cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID); |
319 | } |
320 | |
321 | #ifndef OSD_COLOR |
322 | /* if no color has been specified we just use the gdks default colors */ |
323 | static void |
324 | osm_gps_map_osd_labels(cairo_t *cr, gint width, gboolean enabled, |
325 | GdkColor *fg, GdkColor *disabled) { |
326 | if(enabled) gdk_cairo_set_source_color(cr, fg); |
327 | else gdk_cairo_set_source_color(cr, disabled); |
328 | cairo_set_line_width (cr, width); |
329 | cairo_stroke (cr); |
330 | } |
331 | #else |
332 | static void |
333 | osm_gps_map_osd_labels(cairo_t *cr, gint width, gboolean enabled) { |
334 | if(enabled) cairo_set_source_rgb (cr, OSD_COLOR); |
335 | else cairo_set_source_rgb (cr, OSD_COLOR_DISABLED); |
336 | cairo_set_line_width (cr, width); |
337 | cairo_stroke (cr); |
338 | } |
339 | #endif |
340 | |
341 | #ifdef OSD_SHADOW_ENABLE |
342 | static void |
343 | osm_gps_map_osd_labels_shadow(cairo_t *cr, gint width, gboolean enabled) { |
344 | cairo_set_source_rgba (cr, 0, 0, 0, enabled?0.3:0.15); |
345 | cairo_set_line_width (cr, width); |
346 | cairo_stroke (cr); |
347 | } |
348 | #endif |
349 | |
350 | static void |
351 | osm_gps_map_osd_render(osm_gps_map_osd_t *osd) { |
352 | osd_priv_t *priv = (osd_priv_t*)osd->priv; |
353 | |
354 | /* first fill with transparency */ |
355 | cairo_t *cr = cairo_create(priv->overlay); |
356 | cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE); |
357 | cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0); |
358 | cairo_paint(cr); |
359 | |
360 | #ifndef OSD_COLOR |
361 | GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL]; |
362 | GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL]; |
363 | GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE]; |
364 | #endif |
365 | |
366 | cairo_set_operator(cr, CAIRO_OPERATOR_OVER); |
367 | |
368 | /* --------- draw zoom and dpad shape shadow ----------- */ |
369 | gint x = 0, y = 0; |
370 | |
371 | #ifdef OSD_SHADOW_ENABLE |
372 | osm_gps_map_osd_zoom_shape(cr, x + OSD_SHADOW, y + OSD_SHADOW); |
373 | osm_gps_map_osd_shape_shadow(cr); |
374 | #ifndef OSD_NO_DPAD |
375 | osm_gps_map_osd_dpad_shape(cr, x + OSD_SHADOW, y + OSD_SHADOW); |
376 | osm_gps_map_osd_shape_shadow(cr); |
377 | #endif |
378 | #endif |
379 | |
380 | /* --------- draw zoom and dpad shape ----------- */ |
381 | |
382 | osm_gps_map_osd_zoom_shape(cr, x, y); |
383 | #ifndef OSD_COLOR |
384 | osm_gps_map_osd_shape(cr, &bg, &fg); |
385 | #else |
386 | osm_gps_map_osd_shape(cr); |
387 | #endif |
388 | #ifndef OSD_NO_DPAD |
389 | osm_gps_map_osd_dpad_shape(cr, x, y); |
390 | #ifndef OSD_COLOR |
391 | osm_gps_map_osd_shape(cr, &bg, &fg); |
392 | #else |
393 | osm_gps_map_osd_shape(cr); |
394 | #endif |
395 | #endif |
396 | |
397 | /* --------- draw zoom and dpad labels --------- */ |
398 | |
399 | #ifdef OSD_SHADOW_ENABLE |
400 | osm_gps_map_osd_zoom_labels(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW); |
401 | #ifndef OSD_NO_DPAD |
402 | osm_gps_map_osd_dpad_labels(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW); |
403 | #endif |
404 | osm_gps_map_osd_labels_shadow(cr, Z_RAD/3, TRUE); |
405 | #ifdef OSD_GPS_BUTTON |
406 | osm_gps_map_osd_dpad_gps(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW); |
407 | osm_gps_map_osd_labels_shadow(cr, Z_RAD/6, osd->cb != NULL); |
408 | #endif |
409 | #endif |
410 | |
411 | osm_gps_map_osd_zoom_labels(cr, x, y); |
412 | #ifndef OSD_NO_DPAD |
413 | osm_gps_map_osd_dpad_labels(cr, x, y); |
414 | #endif |
415 | #ifndef OSD_COLOR |
416 | osm_gps_map_osd_labels(cr, Z_RAD/3, TRUE, &fg, &da); |
417 | #else |
418 | osm_gps_map_osd_labels(cr, Z_RAD/3, TRUE); |
419 | #endif |
420 | #ifdef OSD_GPS_BUTTON |
421 | osm_gps_map_osd_dpad_gps(cr, x, y); |
422 | #ifndef OSD_COLOR |
423 | osm_gps_map_osd_labels(cr, Z_RAD/6, osd->cb != NULL, &fg, &da); |
424 | #else |
425 | osm_gps_map_osd_labels(cr, Z_RAD/6, osd->cb != NULL); |
426 | #endif |
427 | #endif |
428 | |
429 | cairo_destroy(cr); |
430 | } |
431 | |
432 | static void |
433 | osm_gps_map_osd_draw(osm_gps_map_osd_t *osd, GdkDrawable *drawable) |
434 | { |
435 | osd_priv_t *priv = (osd_priv_t*)osd->priv; |
436 | |
437 | /* OSD itself uses some off-screen rendering, so check if the */ |
438 | /* offscreen buffer is present and create it if not */ |
439 | if(!priv->overlay) { |
440 | /* create overlay ... */ |
441 | priv->overlay = |
442 | cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W, OSD_H); |
443 | /* ... and render it */ |
444 | osm_gps_map_osd_render(osd); |
445 | } |
446 | |
447 | // now draw this onto the original context |
448 | cairo_t *cr = gdk_cairo_create(drawable); |
449 | |
450 | int x = OSD_X, y = OSD_Y; |
451 | if(OSD_X < 0) |
452 | x = osd->widget->allocation.width - OSD_W + OSD_X; |
453 | |
454 | if(OSD_Y < 0) |
455 | y = osd->widget->allocation.height - OSD_H + OSD_Y; |
456 | |
457 | cairo_set_source_surface(cr, priv->overlay, x, y); |
458 | cairo_paint(cr); |
459 | cairo_destroy(cr); |
460 | } |
461 | |
462 | static void |
463 | osm_gps_map_osd_free(osm_gps_map_osd_t *osd) |
464 | { |
465 | osd_priv_t *priv = (osd_priv_t *)(osd->priv); |
466 | |
467 | if (priv->overlay) |
468 | cairo_surface_destroy(priv->overlay); |
469 | |
470 | g_free(priv); |
471 | } |
472 | |
473 | static osm_gps_map_osd_t osd_classic = { |
474 | .draw = osm_gps_map_osd_draw, |
475 | .check = osm_gps_map_osd_check, |
476 | .render = osm_gps_map_osd_render, |
477 | .free = osm_gps_map_osd_free, |
478 | |
479 | .cb = NULL, |
480 | .data = NULL, |
481 | |
482 | .priv = NULL |
483 | }; |
484 | |
485 | /* this is the only function that's externally visible */ |
486 | void |
487 | osm_gps_map_osd_classic_init(OsmGpsMap *map) |
488 | { |
489 | osd_priv_t *priv = osd_classic.priv = g_new0(osd_priv_t, 1); |
490 | |
491 | osd_classic.priv = priv; |
492 | |
493 | osm_gps_map_register_osd(map, &osd_classic); |
494 | } |
495 | |
496 | #ifdef OSD_GPS_BUTTON |
497 | /* below are osd specific functions which aren't used by osm-gps-map */ |
498 | /* but instead are to be used by the main application */ |
499 | void osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdCallback cb, |
500 | gpointer data) { |
501 | osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map); |
502 | |
503 | g_return_if_fail (osd); |
504 | |
505 | osd->cb = cb; |
506 | osd->data = data; |
507 | |
508 | /* this may have changed the state of the gps button */ |
509 | /* we thus re-render the overlay */ |
510 | osd->render(osd); |
511 | |
512 | osm_gps_map_redraw(map); |
513 | } |
514 | #endif |