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

Parent Directory Parent Directory | Revision Log Revision Log

Revision 100 - (show annotations)
Tue Sep 8 10:24:11 2009 UTC (14 years, 8 months ago) by harbaum
File MIME type: text/plain
File size: 30570 byte(s) 
OSD scale
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 #define OSD_SCALE
29
30 #define OSD_SCALE_W 120
31 #define OSD_SCALE_H 20
32
33 #ifndef USE_CAIRO
34 #error "OSD control display lacks a non-cairo implementation!"
35 #endif
36
37 #include <cairo.h>
38
39 #include "osm-gps-map.h"
40 #include "osm-gps-map-osd-classic.h"
41
42 //the osd controls
43 typedef struct {
44 /* the offscreen representation of the OSD */
45 cairo_surface_t *overlay;
46
47 #ifdef OSD_SCALE
48 cairo_surface_t *scale;
49 #endif
50
51 #ifdef OSD_SOURCE_SEL
52 /* values to handle the "source" menu */
53 cairo_surface_t *map_source;
54 gboolean expanded;
55 gint shift, dir, count;
56 gint handler_id;
57 gint width, height;
58 #endif
59
60 } osd_priv_t;
61
62 /* position and extent of bounding box */
63 #ifndef OSD_X
64 #define OSD_X (10)
65 #endif
66
67 #ifndef OSD_Y
68 #define OSD_Y (10)
69 #endif
70
71 /* parameters of the direction shape */
72 #ifndef OSD_DIAMETER
73 #define D_RAD (30) // diameter of dpad
74 #else
75 #define D_RAD (OSD_DIAMETER)
76 #endif
77 #define D_TIP (4*D_RAD/5) // distance of arrow tip from dpad center
78 #define D_LEN (D_RAD/4) // length of arrow
79 #define D_WID (D_LEN) // width of arrow
80
81 /* parameters of the "zoom" pad */
82 #define Z_STEP (D_RAD/4) // distance between dpad and zoom
83 #define Z_RAD (D_RAD/2) // radius of "caps" of zoom bar
84
85 #ifdef OSD_SHADOW_ENABLE
86 /* shadow also depends on control size */
87 #define OSD_SHADOW (D_RAD/6)
88 #else
89 #define OSD_SHADOW (0)
90 #endif
91
92 /* normally the GPS button is in the center of the dpad. if there's */
93 /* no dpad it will go into the zoom area */
94 #if defined(OSD_GPS_BUTTON) && defined(OSD_NO_DPAD)
95 #define Z_GPS 1
96 #else
97 #define Z_GPS 0
98 #endif
99
100 /* total width and height of controls incl. shadow */
101 #define OSD_W (2*D_RAD + OSD_SHADOW + Z_GPS * 2 * Z_RAD)
102 #if !Z_GPS
103 #define OSD_H (2*D_RAD + Z_STEP + 2*Z_RAD + OSD_SHADOW)
104 #else
105 #define OSD_H (2*Z_RAD + OSD_SHADOW)
106 #endif
107
108 #ifdef OSD_SHADOW_ENABLE
109 #define OSD_LBL_SHADOW (OSD_SHADOW/2)
110 #endif
111
112 #define Z_TOP ((1-Z_GPS) * (2 * D_RAD + Z_STEP))
113
114 #define Z_MID (Z_TOP + Z_RAD)
115 #define Z_BOT (Z_MID + Z_RAD)
116 #define Z_LEFT (Z_RAD)
117 #define Z_RIGHT (2 * D_RAD - Z_RAD + Z_GPS * 2 * Z_RAD)
118 #define Z_CENTER ((Z_RIGHT + Z_LEFT)/2)
119
120 /* create the cairo shape used for the zoom buttons */
121 static void
122 osd_zoom_shape(cairo_t *cr, gint x, gint y)
123 {
124 cairo_move_to (cr, x+Z_LEFT, y+Z_TOP);
125 cairo_line_to (cr, x+Z_RIGHT, y+Z_TOP);
126 cairo_arc (cr, x+Z_RIGHT, y+Z_MID, Z_RAD, -M_PI/2, M_PI/2);
127 cairo_line_to (cr, x+Z_LEFT, y+Z_BOT);
128 cairo_arc (cr, x+Z_LEFT, y+Z_MID, Z_RAD, M_PI/2, -M_PI/2);
129 }
130
131 /* ------------------- color/shadow functions ----------------- */
132
133 #ifndef OSD_COLOR
134 /* if no color has been specified we just use the gdks default colors */
135 static void
136 osd_labels(cairo_t *cr, gint width, gboolean enabled,
137 GdkColor *fg, GdkColor *disabled) {
138 if(enabled) gdk_cairo_set_source_color(cr, fg);
139 else gdk_cairo_set_source_color(cr, disabled);
140 cairo_set_line_width (cr, width);
141 }
142 #else
143 static void
144 osd_labels(cairo_t *cr, gint width, gboolean enabled) {
145 if(enabled) cairo_set_source_rgb (cr, OSD_COLOR);
146 else cairo_set_source_rgb (cr, OSD_COLOR_DISABLED);
147 cairo_set_line_width (cr, width);
148 }
149 #endif
150
151 #ifdef OSD_SHADOW_ENABLE
152 static void
153 osd_labels_shadow(cairo_t *cr, gint width, gboolean enabled) {
154 cairo_set_source_rgba (cr, 0, 0, 0, enabled?0.3:0.15);
155 cairo_set_line_width (cr, width);
156 }
157 #endif
158
159 #ifndef OSD_NO_DPAD
160 /* create the cairo shape used for the dpad */
161 static void
162 osd_dpad_shape(cairo_t *cr, gint x, gint y)
163 {
164 cairo_arc (cr, x+D_RAD, y+D_RAD, D_RAD, 0, 2 * M_PI);
165 }
166 #endif
167
168 #ifdef OSD_SHADOW_ENABLE
169 static void
170 osd_shape_shadow(cairo_t *cr) {
171 cairo_set_source_rgba (cr, 0, 0, 0, 0.2);
172 cairo_fill (cr);
173 cairo_stroke (cr);
174 }
175 #endif
176
177 #ifndef OSD_COLOR
178 /* if no color has been specified we just use the gdks default colors */
179 static void
180 osd_shape(cairo_t *cr, GdkColor *bg, GdkColor *fg) {
181 gdk_cairo_set_source_color(cr, bg);
182 cairo_fill_preserve (cr);
183 gdk_cairo_set_source_color(cr, fg);
184 cairo_set_line_width (cr, 1);
185 cairo_stroke (cr);
186 }
187 #else
188 static void
189 osd_shape(cairo_t *cr) {
190 cairo_set_source_rgb (cr, OSD_COLOR_BG);
191 cairo_fill_preserve (cr);
192 cairo_set_source_rgb (cr, OSD_COLOR);
193 cairo_set_line_width (cr, 1);
194 cairo_stroke (cr);
195 }
196 #endif
197
198
199 static gboolean
200 osm_gps_map_in_circle(gint x, gint y, gint cx, gint cy, gint rad)
201 {
202 return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad);
203 }
204
205 #ifndef OSD_NO_DPAD
206 /* check whether x/y is within the dpad */
207 static osd_button_t
208 osd_check_dpad(gint x, gint y)
209 {
210 /* within entire dpad circle */
211 if( osm_gps_map_in_circle(x, y, D_RAD, D_RAD, D_RAD))
212 {
213 /* convert into position relative to dpads centre */
214 x -= D_RAD;
215 y -= D_RAD;
216
217 #ifdef OSD_GPS_BUTTON
218 /* check for dpad center goes here! */
219 if( osm_gps_map_in_circle(x, y, 0, 0, D_RAD/3))
220 return OSD_GPS;
221 #endif
222
223 if( y < 0 && abs(x) < abs(y))
224 return OSD_UP;
225
226 if( y > 0 && abs(x) < abs(y))
227 return OSD_DOWN;
228
229 if( x < 0 && abs(y) < abs(x))
230 return OSD_LEFT;
231
232 if( x > 0 && abs(y) < abs(x))
233 return OSD_RIGHT;
234
235 return OSD_BG;
236 }
237 return OSD_NONE;
238 }
239 #endif
240
241 /* check whether x/y is within the zoom pads */
242 static osd_button_t
243 osd_check_zoom(gint x, gint y) {
244 if( x > 0 && x < OSD_W && y > Z_TOP && y < Z_BOT) {
245
246 /* within circle around (-) label */
247 if( osm_gps_map_in_circle(x, y, Z_LEFT, Z_MID, Z_RAD))
248 return OSD_OUT;
249
250 /* within circle around (+) label */
251 if( osm_gps_map_in_circle(x, y, Z_RIGHT, Z_MID, Z_RAD))
252 return OSD_IN;
253
254 #if Z_GPS == 1
255 /* within square around center */
256 if( x > Z_CENTER - Z_RAD && x < Z_CENTER + Z_RAD)
257 return OSD_GPS;
258 #endif
259
260 /* between center of (-) button and center of entire zoom control area */
261 if(x > OSD_LEFT && x < D_RAD)
262 return OSD_OUT;
263
264 /* between center of (+) button and center of entire zoom control area */
265 if(x < OSD_RIGHT && x > D_RAD)
266 return OSD_IN;
267 }
268
269 return OSD_NONE;
270 }
271
272 #ifdef OSD_SOURCE_SEL
273
274 /* place source selection at right border */
275 #define OSD_S_RAD (Z_RAD)
276 #define OSD_S_X (-OSD_X)
277 #define OSD_S_Y (OSD_Y)
278 #define OSD_S_PW (2 * Z_RAD)
279 #define OSD_S_W (OSD_S_PW)
280 #define OSD_S_PH (2 * Z_RAD)
281 #define OSD_S_H (OSD_S_PH + OSD_SHADOW)
282
283 /* size of usable area when expanded */
284 #define OSD_S_AREA_W (priv->width)
285 #define OSD_S_AREA_H (priv->height)
286 #define OSD_S_EXP_W (OSD_S_PW + OSD_S_AREA_W + OSD_SHADOW)
287 #define OSD_S_EXP_H (OSD_S_AREA_H + OSD_SHADOW)
288
289 /* internal value to draw the arrow on the "puller" */
290 #define OSD_S_D0 (OSD_S_RAD/2)
291 #ifndef OSD_FONT_SIZE
292 #define OSD_FONT_SIZE 16.0
293 #endif
294 #define OSD_TEXT_BORDER (OSD_FONT_SIZE/2)
295 #define OSD_TEXT_SKIP (OSD_FONT_SIZE/8)
296
297 /* draw the shape of the source selection OSD, either only the puller (not expanded) */
298 /* or the entire menu incl. the puller (expanded) */
299 static void
300 osd_source_shape(osd_priv_t *priv, cairo_t *cr, gint x, gint y) {
301 if(!priv->expanded) {
302 /* just draw the puller */
303 cairo_move_to (cr, x + OSD_S_PW, y + OSD_S_PH);
304 cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
305 cairo_line_to (cr, x + OSD_S_PW, y);
306 } else {
307 /* draw the puller and the area itself */
308 cairo_move_to (cr, x + OSD_S_PW + OSD_S_AREA_W, y + OSD_S_AREA_H);
309 cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_AREA_H);
310 if(OSD_S_Y > 0) {
311 cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_PH);
312 cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
313 } else {
314 cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_AREA_H-OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
315 cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_AREA_H - OSD_S_PH);
316 cairo_line_to (cr, x + OSD_S_PW, y);
317 }
318 cairo_line_to (cr, x + OSD_S_PW + OSD_S_AREA_W, y);
319 cairo_close_path (cr);
320 }
321 }
322
323 static void
324 osd_source_content(osm_gps_map_osd_t *osd, cairo_t *cr, gint offset) {
325 osd_priv_t *priv = (osd_priv_t*)osd->priv;
326
327 int py = offset + OSD_S_RAD - OSD_S_D0;
328
329 if(!priv->expanded) {
330 /* draw the "puller" open (<) arrow */
331 cairo_move_to (cr, offset + OSD_S_RAD + OSD_S_D0/2, py);
332 cairo_rel_line_to (cr, -OSD_S_D0, +OSD_S_D0);
333 cairo_rel_line_to (cr, +OSD_S_D0, +OSD_S_D0);
334 } else {
335 if(OSD_S_Y < 0)
336 py += OSD_S_AREA_H - OSD_S_PH;
337
338 /* draw the "puller" close (>) arrow */
339 cairo_move_to (cr, offset + OSD_S_RAD - OSD_S_D0/2, py);
340 cairo_rel_line_to (cr, +OSD_S_D0, +OSD_S_D0);
341 cairo_rel_line_to (cr, -OSD_S_D0, +OSD_S_D0);
342 cairo_stroke(cr);
343
344 /* don't draw a shadow for the text content */
345 if(offset == 1) {
346 gint source;
347 g_object_get(osd->widget, "map-source", &source, NULL);
348
349 cairo_select_font_face (cr, "Sans",
350 CAIRO_FONT_SLANT_NORMAL,
351 CAIRO_FONT_WEIGHT_BOLD);
352 cairo_set_font_size (cr, OSD_FONT_SIZE);
353
354 int i, step = (priv->height - 2*OSD_TEXT_BORDER) /
355 OSM_GPS_MAP_SOURCE_LAST;
356 for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) {
357 cairo_text_extents_t extents;
358 const char *src = osm_gps_map_source_get_friendly_name(i);
359 cairo_text_extents (cr, src, &extents);
360
361 int x = offset + OSD_S_PW + OSD_TEXT_BORDER;
362 int y = offset + step * (i-1) + OSD_TEXT_BORDER;
363
364 /* draw filled rectangle if selected */
365 if(source == i) {
366 cairo_rectangle(cr, x - OSD_TEXT_BORDER/2,
367 y - OSD_TEXT_SKIP,
368 priv->width - OSD_TEXT_BORDER,
369 step + OSD_TEXT_SKIP);
370 cairo_fill(cr);
371
372 /* temprarily draw with background color */
373 #ifndef OSD_COLOR
374 GdkColor bg = osd->widget->style->bg[GTK_STATE_NORMAL];
375 gdk_cairo_set_source_color(cr, &bg);
376 #else
377 cairo_set_source_rgb (cr, OSD_COLOR_BG);
378 #endif
379 }
380
381 cairo_move_to (cr, x, y + OSD_TEXT_SKIP - extents.y_bearing);
382 cairo_show_text (cr, src);
383
384 /* restore color */
385 if(source == i) {
386 #ifndef OSD_COLOR
387 GdkColor fg = osd->widget->style->fg[GTK_STATE_NORMAL];
388 gdk_cairo_set_source_color(cr, &fg);
389 #else
390 cairo_set_source_rgb (cr, OSD_COLOR);
391 #endif
392 }
393 }
394 }
395 }
396 }
397
398 static void
399 osd_render_source_sel(osm_gps_map_osd_t *osd) {
400 osd_priv_t *priv = (osd_priv_t*)osd->priv;
401
402 #ifndef OSD_COLOR
403 GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL];
404 GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL];
405 GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE];
406 #endif
407
408 /* draw source selector */
409 cairo_t *cr = cairo_create(priv->map_source);
410 cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
411 cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
412 cairo_paint(cr);
413 cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
414
415 #ifdef OSD_SHADOW_ENABLE
416 osd_source_shape(priv, cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
417 osd_shape_shadow(cr);
418 #endif
419
420 osd_source_shape(priv, cr, 1, 1);
421 #ifndef OSD_COLOR
422 osd_shape(cr, &bg, &fg);
423 #else
424 osd_shape(cr);
425 #endif
426
427 #ifdef OSD_SHADOW_ENABLE
428 osd_labels_shadow(cr, Z_RAD/3, TRUE);
429 osd_source_content(osd, cr, 1+OSD_LBL_SHADOW);
430 cairo_stroke (cr);
431 #endif
432 #ifndef OSD_COLOR
433 osd_labels(cr, Z_RAD/3, TRUE, &fg, &da);
434 #else
435 osd_labels(cr, Z_RAD/3, TRUE);
436 #endif
437 osd_source_content(osd, cr, 1);
438 cairo_stroke (cr);
439
440 cairo_destroy(cr);
441 }
442
443 /* re-allocate the buffer used to draw the menu. This is used */
444 /* to collapse/expand the buffer */
445 static void
446 osd_source_reallocate(osm_gps_map_osd_t *osd) {
447 osd_priv_t *priv = (osd_priv_t*)osd->priv;
448
449 /* re-allocate offscreen bitmap */
450 g_assert (priv->map_source);
451
452 int w = OSD_S_W, h = OSD_S_H;
453 if(priv->expanded) {
454 cairo_text_extents_t extents;
455
456 /* determine content size */
457 cairo_t *cr = cairo_create(priv->map_source);
458 cairo_select_font_face (cr, "Sans",
459 CAIRO_FONT_SLANT_NORMAL,
460 CAIRO_FONT_WEIGHT_BOLD);
461 cairo_set_font_size (cr, OSD_FONT_SIZE);
462
463 /* calculate menu size */
464 int i, max_h = 0, max_w = 0;
465 for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) {
466 const char *src = osm_gps_map_source_get_friendly_name(i);
467 cairo_text_extents (cr, src, &extents);
468
469 if(extents.width > max_w) max_w = extents.width;
470 if(extents.height > max_h) max_h = extents.height;
471 }
472 cairo_destroy(cr);
473
474 priv->width = max_w + 2*OSD_TEXT_BORDER;
475 priv->height = OSM_GPS_MAP_SOURCE_LAST *
476 (max_h + 2*OSD_TEXT_SKIP) + 2*OSD_TEXT_BORDER;
477
478 w = OSD_S_EXP_W;
479 h = OSD_S_EXP_H;
480 }
481
482 cairo_surface_destroy(priv->map_source);
483 priv->map_source =
484 cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w+2, h+2);
485
486 osd_render_source_sel(osd);
487 }
488
489 #define OSD_HZ 15
490 #define OSD_TIME 500
491
492 static gboolean osd_source_animate(gpointer data) {
493 osm_gps_map_osd_t *osd = (osm_gps_map_osd_t*)data;
494 osd_priv_t *priv = (osd_priv_t*)osd->priv;
495 int diff = OSD_S_EXP_W - OSD_S_W - OSD_S_X;
496 gboolean done = FALSE;
497 priv->count += priv->dir;
498
499 /* shifting in */
500 if(priv->dir < 0) {
501 if(priv->count <= 0) {
502 priv->count = 0;
503 done = TRUE;
504 }
505 } else {
506 if(priv->count >= 1000) {
507 priv->expanded = FALSE;
508 osd_source_reallocate(osd);
509
510 priv->count = 1000;
511 done = TRUE;
512 }
513 }
514
515
516 /* count runs linearly from 0 to 1000, map this nicely onto a position */
517
518 /* nicer sinoid mapping */
519 float m = 0.5-cos(priv->count * M_PI / 1000.0)/2;
520 priv->shift = (osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X) +
521 m * diff;
522
523 osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
524
525 if(done)
526 priv->handler_id = 0;
527
528 return !done;
529 }
530
531 /* switch between expand and collapse mode of source selection */
532 static void
533 osd_source_toggle(osm_gps_map_osd_t *osd)
534 {
535 osd_priv_t *priv = (osd_priv_t*)osd->priv;
536
537 /* ignore clicks while animation is running */
538 if(priv->handler_id)
539 return;
540
541 /* expand immediately, collapse is handle at the end of the collapse animation */
542 if(!priv->expanded) {
543 priv->expanded = TRUE;
544 osd_source_reallocate(osd);
545
546 priv->count = 1000;
547 priv->shift = osd->widget->allocation.width - OSD_S_W;
548 priv->dir = -1000/OSD_HZ;
549 } else {
550 priv->count = 0;
551 priv->shift = osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
552 priv->dir = +1000/OSD_HZ;
553 }
554
555 priv->handler_id = gtk_timeout_add(OSD_TIME/OSD_HZ, osd_source_animate, osd);
556 }
557
558 /* check if the user clicked inside the source selection area */
559 static osd_button_t
560 osd_source_check(osm_gps_map_osd_t *osd, gint x, gint y) {
561 osd_priv_t *priv = (osd_priv_t*)osd->priv;
562
563 if(!priv->expanded)
564 x -= osd->widget->allocation.width - OSD_S_W;
565 else
566 x -= osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
567
568 if(OSD_S_Y > 0)
569 y -= OSD_S_Y;
570 else
571 y -= osd->widget->allocation.height - OSD_S_PH + OSD_S_Y;
572
573 /* within square around puller? */
574 if(y > 0 && y < OSD_S_PH && x > 0 && x < OSD_S_PW) {
575 /* really within puller shape? */
576 if(x > Z_RAD || osm_gps_map_in_circle(x, y, Z_RAD, Z_RAD, Z_RAD)) {
577 /* expand source selector */
578 osd_source_toggle(osd);
579
580 /* tell upper layers that user clicked some background element */
581 /* of the OSD */
582 return OSD_BG;
583 }
584 }
585
586 /* check for clicks into data area */
587 if(priv->expanded && !priv->handler_id) {
588 /* re-adjust from puller top to content top */
589 if(OSD_S_Y < 0)
590 y += OSD_S_EXP_H - OSD_S_PH;
591
592 if(x > OSD_S_PW &&
593 x < OSD_S_PW + OSD_S_EXP_W &&
594 y > 0 &&
595 y < OSD_S_EXP_H) {
596
597 int step = (priv->height - 2*OSD_TEXT_BORDER)
598 / OSM_GPS_MAP_SOURCE_LAST;
599
600 y -= OSD_TEXT_BORDER - OSD_TEXT_SKIP;
601 y /= step;
602 y += 1;
603
604 gint old = 0;
605 g_object_get(osd->widget, "map-source", &old, NULL);
606
607 if(y > OSM_GPS_MAP_SOURCE_NULL &&
608 y <= OSM_GPS_MAP_SOURCE_LAST &&
609 old != y) {
610 g_object_set(osd->widget, "map-source", y, NULL);
611
612 osd_render_source_sel(osd);
613 osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
614 }
615
616 /* return "clicked in OSD background" to prevent further */
617 /* processing by application */
618 return OSD_BG;
619 }
620 }
621
622 return OSD_NONE;
623 }
624 #endif // OSD_SOURCE_SEL
625
626 static osd_button_t
627 osd_check(osm_gps_map_osd_t *osd, gint x, gint y) {
628 osd_button_t but = OSD_NONE;
629
630 #ifdef OSD_SOURCE_SEL
631 /* the source selection area is handles internally */
632 but = osd_source_check(osd, x, y);
633 if(but != OSD_NONE)
634 return but;
635 #endif
636
637 x -= OSD_X;
638 y -= OSD_Y;
639
640 if(OSD_X < 0)
641 x -= (osd->widget->allocation.width - OSD_W);
642
643 if(OSD_Y < 0)
644 y -= (osd->widget->allocation.height - OSD_H);
645
646 /* first do a rough test for the OSD area. */
647 /* this is just to avoid an unnecessary detailed test */
648 if(x > 0 && x < OSD_W && y > 0 && y < OSD_H) {
649 #ifndef OSD_NO_DPAD
650 but = osd_check_dpad(x, y);
651 #endif
652
653 if(but == OSD_NONE)
654 but = osd_check_zoom(x, y);
655 }
656
657 return but;
658 }
659
660 #ifndef OSD_NO_DPAD
661 static void
662 osd_dpad_labels(cairo_t *cr, gint x, gint y) {
663 /* move reference to dpad center */
664 x += D_RAD;
665 y += D_RAD;
666
667 const static gint offset[][3][2] = {
668 /* left arrow/triangle */
669 { { -D_TIP+D_LEN, -D_WID }, { -D_LEN, D_WID }, { +D_LEN, D_WID } },
670 /* right arrow/triangle */
671 { { +D_TIP-D_LEN, -D_WID }, { +D_LEN, D_WID }, { -D_LEN, D_WID } },
672 /* top arrow/triangle */
673 { { -D_WID, -D_TIP+D_LEN }, { D_WID, -D_LEN }, { D_WID, +D_LEN } },
674 /* bottom arrow/triangle */
675 { { -D_WID, +D_TIP-D_LEN }, { D_WID, +D_LEN }, { D_WID, -D_LEN } }
676 };
677
678 int i;
679 for(i=0;i<4;i++) {
680 cairo_move_to (cr, x + offset[i][0][0], y + offset[i][0][1]);
681 cairo_rel_line_to (cr, offset[i][1][0], offset[i][1][1]);
682 cairo_rel_line_to (cr, offset[i][2][0], offset[i][2][1]);
683 }
684 }
685 #endif
686
687 #ifdef OSD_GPS_BUTTON
688 /* draw the satellite dish icon in the center of the dpad */
689 #define GPS_V0 (D_RAD/7)
690 #define GPS_V1 (D_RAD/10)
691 #define GPS_V2 (D_RAD/5)
692
693 /* draw a satellite receiver dish */
694 /* this is either drawn in the center of the dpad (if present) */
695 /* or in the middle of the zoom area */
696 static void
697 osd_dpad_gps(cairo_t *cr, gint x, gint y) {
698 /* move reference to dpad center */
699 x += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD * 3;
700 y += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD + GPS_V0;
701
702 cairo_move_to (cr, x-GPS_V0, y+GPS_V0);
703 cairo_rel_line_to (cr, +GPS_V0, -GPS_V0);
704 cairo_rel_line_to (cr, +GPS_V0, +GPS_V0);
705 cairo_close_path (cr);
706
707 cairo_move_to (cr, x+GPS_V1-GPS_V2, y-2*GPS_V2);
708 cairo_curve_to (cr, x-GPS_V2, y, x+GPS_V1, y+GPS_V1, x+GPS_V1+GPS_V2, y);
709 cairo_close_path (cr);
710
711 x += GPS_V1;
712 cairo_move_to (cr, x, y-GPS_V2);
713 cairo_rel_line_to (cr, +GPS_V1, -GPS_V1);
714 }
715 #endif
716
717 #define Z_LEN (2*Z_RAD/3)
718
719 static void
720 osd_zoom_labels(cairo_t *cr, gint x, gint y) {
721 cairo_move_to (cr, x + Z_LEFT - Z_LEN, y + Z_MID);
722 cairo_line_to (cr, x + Z_LEFT + Z_LEN, y + Z_MID);
723
724 cairo_move_to (cr, x + Z_RIGHT, y + Z_MID - Z_LEN);
725 cairo_line_to (cr, x + Z_RIGHT, y + Z_MID + Z_LEN);
726 cairo_move_to (cr, x + Z_RIGHT - Z_LEN, y + Z_MID);
727 cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);
728 }
729
730 static char *
731 dist_str_metric(int dist)
732 {
733 if(dist<1000)
734 return g_strdup_printf("%u m", dist);
735
736 return g_strdup_printf("%u km", dist/1000);
737 }
738
739 static void
740 osd_render_scale(osm_gps_map_osd_t *osd)
741 {
742 osd_priv_t *priv = (osd_priv_t*)osd->priv;
743 float m_per_pix = osm_gps_map_get_scale(OSM_GPS_MAP(osd->widget));
744
745 /* first fill with transparency */
746 cairo_t *cr = cairo_create(priv->scale);
747 cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
748 cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
749 // cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.2);
750 cairo_paint(cr);
751 cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
752
753 /* determine the size of the scale width in meters */
754 float width = (OSD_SCALE_W-2) * m_per_pix;
755 printf("width = %f meters\n", width);
756
757 /* scale this to useful values */
758 int exp = logf(width)*M_LOG10E;
759 int mant = width/pow(10,exp);
760 printf("mant = %d, exp = %d \n", mant, exp);
761
762 int width_metric = mant * pow(10,exp);
763 char *dist_str = dist_str_metric(width_metric);
764 width_metric /= m_per_pix;
765 printf("metric scale width = %d pixels: %s\n", width_metric, dist_str);
766
767 int font_size = 12;
768
769 cairo_select_font_face (cr, "Sans",
770 CAIRO_FONT_SLANT_NORMAL,
771 CAIRO_FONT_WEIGHT_BOLD);
772 cairo_set_font_size (cr, font_size);
773 cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
774
775 cairo_text_extents_t extents;
776 cairo_text_extents (cr, dist_str, &extents);
777
778 cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
779 cairo_move_to (cr, font_size/3, font_size);
780 cairo_text_path (cr, dist_str);
781 cairo_set_line_width (cr, 2);
782 cairo_stroke (cr);
783
784 cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
785 cairo_move_to (cr, font_size/3, font_size);
786 cairo_show_text (cr, dist_str);
787
788 /* draw white line */
789 cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
790 cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 1.0);
791 cairo_set_line_width (cr, 4);
792 cairo_move_to (cr, 2, 2*font_size/3);
793 cairo_rel_line_to (cr, 0, 2*font_size/3);
794 cairo_rel_line_to (cr, width_metric, 0);
795 cairo_rel_line_to (cr, 0, -2*font_size/3);
796 cairo_stroke(cr);
797
798 /* draw black line */
799 cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
800 cairo_set_line_width (cr, 2);
801 cairo_move_to (cr, 2, 2*font_size/3);
802 cairo_rel_line_to (cr, 0, 2*font_size/3);
803 cairo_rel_line_to (cr, width_metric, 0);
804 cairo_rel_line_to (cr, 0, -2*font_size/3);
805 cairo_stroke(cr);
806
807 /* xyz */
808
809 cairo_destroy(cr);
810 }
811
812 static void
813 osd_render(osm_gps_map_osd_t *osd)
814 {
815 osd_priv_t *priv = (osd_priv_t*)osd->priv;
816
817 #ifndef OSD_COLOR
818 GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL];
819 GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL];
820 GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE];
821 #endif
822
823 /* first fill with transparency */
824 cairo_t *cr = cairo_create(priv->overlay);
825 cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
826 cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
827 cairo_paint(cr);
828 cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
829
830 /* --------- draw zoom and dpad shape shadow ----------- */
831 #ifdef OSD_SHADOW_ENABLE
832 osd_zoom_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
833 osd_shape_shadow(cr);
834 #ifndef OSD_NO_DPAD
835 osd_dpad_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
836 osd_shape_shadow(cr);
837 #endif
838 #endif
839
840 /* --------- draw zoom and dpad shape ----------- */
841
842 osd_zoom_shape(cr, 1, 1);
843 #ifndef OSD_COLOR
844 osd_shape(cr, &bg, &fg);
845 #else
846 osd_shape(cr);
847 #endif
848 #ifndef OSD_NO_DPAD
849 osd_dpad_shape(cr, 1, 1);
850 #ifndef OSD_COLOR
851 osd_shape(cr, &bg, &fg);
852 #else
853 osd_shape(cr);
854 #endif
855 #endif
856
857 /* --------- draw zoom and dpad labels --------- */
858
859 #ifdef OSD_SHADOW_ENABLE
860 osd_labels_shadow(cr, Z_RAD/3, TRUE);
861 osd_zoom_labels(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
862 #ifndef OSD_NO_DPAD
863 osd_dpad_labels(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
864 #endif
865 cairo_stroke(cr);
866 #ifdef OSD_GPS_BUTTON
867 osd_labels_shadow(cr, Z_RAD/6, osd->cb != NULL);
868 osd_dpad_gps(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
869 cairo_stroke(cr);
870 #endif
871 #endif
872
873 #ifndef OSD_COLOR
874 osd_labels(cr, Z_RAD/3, TRUE, &fg, &da);
875 #else
876 osd_labels(cr, Z_RAD/3, TRUE);
877 #endif
878 osd_zoom_labels(cr, 1, 1);
879 #ifndef OSD_NO_DPAD
880 osd_dpad_labels(cr, 1, 1);
881 #endif
882 cairo_stroke(cr);
883
884 #ifndef OSD_COLOR
885 osd_labels(cr, Z_RAD/6, osd->cb != NULL, &fg, &da);
886 #else
887 osd_labels(cr, Z_RAD/6, osd->cb != NULL);
888 #endif
889 #ifdef OSD_GPS_BUTTON
890 osd_dpad_gps(cr, 1, 1);
891 #endif
892 cairo_stroke(cr);
893
894 cairo_destroy(cr);
895
896 #ifdef OSD_SOURCE_SEL
897 osd_render_source_sel(osd);
898 #endif
899
900 #ifdef OSD_SCALE
901 osd_render_scale(osd);
902 #endif
903 }
904
905 static void
906 osd_draw(osm_gps_map_osd_t *osd, GdkDrawable *drawable)
907 {
908 osd_priv_t *priv = (osd_priv_t*)osd->priv;
909
910 /* OSD itself uses some off-screen rendering, so check if the */
911 /* offscreen buffer is present and create it if not */
912 if(!priv->overlay) {
913 /* create overlay ... */
914 priv->overlay =
915 cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W+2, OSD_H+2);
916
917 #ifdef OSD_SOURCE_SEL
918 /* the initial OSD state is alway not-expanded */
919 priv->map_source =
920 cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
921 OSD_S_W+2, OSD_S_H+2);
922 #endif
923
924 #ifdef OSD_SCALE
925 priv->scale =
926 cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
927 OSD_SCALE_W+2, OSD_SCALE_H+2);
928 #endif
929
930 /* ... and render it */
931 osd_render(osd);
932 }
933
934 // now draw this onto the original context
935 cairo_t *cr = gdk_cairo_create(drawable);
936
937 int x = OSD_X, y = OSD_Y;
938 if(OSD_X < 0)
939 x = osd->widget->allocation.width - OSD_W + OSD_X;
940
941 if(OSD_Y < 0)
942 y = osd->widget->allocation.height - OSD_H + OSD_Y;
943
944 cairo_set_source_surface(cr, priv->overlay, x, y);
945 cairo_paint(cr);
946
947 #ifdef OSD_SOURCE_SEL
948 if(!priv->handler_id) {
949 /* the OSD source selection is not being animated */
950 if(!priv->expanded)
951 x = osd->widget->allocation.width - OSD_S_W;
952 else
953 x = osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
954 } else
955 x = priv->shift;
956
957 y = OSD_S_Y;
958 if(OSD_S_Y < 0) {
959 if(!priv->expanded)
960 y = osd->widget->allocation.height - OSD_S_H + OSD_S_Y;
961 else
962 y = osd->widget->allocation.height - OSD_S_EXP_H + OSD_S_Y;
963 }
964
965 cairo_set_source_surface(cr, priv->map_source, x, y);
966 cairo_paint(cr);
967 #endif
968
969 #ifdef OSD_SCALE
970 x = OSD_X;
971 y = -OSD_Y;
972 if(x < 0) x += osd->widget->allocation.width - OSD_SCALE_W;
973 if(y < 0) y += osd->widget->allocation.height - OSD_SCALE_H;
974
975 cairo_set_source_surface(cr, priv->scale, x, y);
976 cairo_paint(cr);
977 #endif
978
979 cairo_destroy(cr);
980 }
981
982 static void
983 osd_free(osm_gps_map_osd_t *osd)
984 {
985 osd_priv_t *priv = (osd_priv_t *)(osd->priv);
986
987 if (priv->overlay)
988 cairo_surface_destroy(priv->overlay);
989
990 #ifdef OSD_SOURCE_SEL
991 if(priv->handler_id)
992 gtk_timeout_remove(priv->handler_id);
993
994 if (priv->map_source)
995 cairo_surface_destroy(priv->map_source);
996 #endif
997
998 #ifdef OSD_SCALE
999 if (priv->scale)
1000 cairo_surface_destroy(priv->scale);
1001 #endif
1002
1003 g_free(priv);
1004 }
1005
1006 static gboolean
1007 osd_busy(osm_gps_map_osd_t *osd)
1008 {
1009 #ifdef OSD_SOURCE_SEL
1010 osd_priv_t *priv = (osd_priv_t *)(osd->priv);
1011 return (priv->handler_id != 0);
1012 #else
1013 return FALSE;
1014 #endif
1015 }
1016
1017 static osm_gps_map_osd_t osd_classic = {
1018 .widget = NULL,
1019
1020 .draw = osd_draw,
1021 .check = osd_check,
1022 .render = osd_render,
1023 .free = osd_free,
1024 .busy = osd_busy,
1025
1026 .cb = NULL,
1027 .data = NULL,
1028
1029 .priv = NULL
1030 };
1031
1032 /* this is the only function that's externally visible */
1033 void
1034 osm_gps_map_osd_classic_init(OsmGpsMap *map)
1035 {
1036 osd_priv_t *priv = osd_classic.priv = g_new0(osd_priv_t, 1);
1037
1038 osd_classic.priv = priv;
1039
1040 osm_gps_map_register_osd(map, &osd_classic);
1041 }
1042
1043 #ifdef OSD_GPS_BUTTON
1044 /* below are osd specific functions which aren't used by osm-gps-map */
1045 /* but instead are to be used by the main application */
1046 void osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdCallback cb,
1047 gpointer data) {
1048 osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1049 g_return_if_fail (osd);
1050
1051 osd->cb = cb;
1052 osd->data = data;
1053
1054 /* this may have changed the state of the gps button */
1055 /* we thus re-render the overlay */
1056 osd->render(osd);
1057
1058 osm_gps_map_redraw(map);
1059 }
1060 #endif
1061
1062 osd_button_t
1063 osm_gps_map_osd_check(OsmGpsMap *map, gint x, gint y) {
1064 osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1065 g_return_val_if_fail (osd, OSD_NONE);
1066
1067 return osd_check(osd, x, y);
1068 }