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

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Revision 98 - (show annotations)
Mon Sep 7 13:20:37 2009 UTC (14 years, 8 months ago) by harbaum
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File size: 28947 byte(s) 
First scale work
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 100
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 /* ... and right of it the waypoint id */
455 cairo_text_extents_t extents;
456
457 /* determine content size */
458 cairo_t *cr = cairo_create(priv->map_source);
459 cairo_select_font_face (cr, "Sans",
460 CAIRO_FONT_SLANT_NORMAL,
461 CAIRO_FONT_WEIGHT_BOLD);
462 cairo_set_font_size (cr, OSD_FONT_SIZE);
463
464 /* calculate menu size */
465 int i, max_h = 0, max_w = 0;
466 for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) {
467 const char *src = osm_gps_map_source_get_friendly_name(i);
468 cairo_text_extents (cr, src, &extents);
469
470 if(extents.width > max_w) max_w = extents.width;
471 if(extents.height > max_h) max_h = extents.height;
472 }
473 cairo_destroy(cr);
474
475 priv->width = max_w + 2*OSD_TEXT_BORDER;
476 priv->height = OSM_GPS_MAP_SOURCE_LAST *
477 (max_h + 2*OSD_TEXT_SKIP) + 2*OSD_TEXT_BORDER;
478
479 w = OSD_S_EXP_W;
480 h = OSD_S_EXP_H;
481 }
482
483 cairo_surface_destroy(priv->map_source);
484 priv->map_source =
485 cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w+2, h+2);
486
487 osd_render_source_sel(osd);
488 }
489
490 #define OSD_HZ 15
491 #define OSD_TIME 500
492
493 static gboolean osd_source_animate(gpointer data) {
494 osm_gps_map_osd_t *osd = (osm_gps_map_osd_t*)data;
495 osd_priv_t *priv = (osd_priv_t*)osd->priv;
496 int diff = OSD_S_EXP_W - OSD_S_W - OSD_S_X;
497 gboolean done = FALSE;
498 priv->count += priv->dir;
499
500 /* shifting in */
501 if(priv->dir < 0) {
502 if(priv->count <= 0) {
503 priv->count = 0;
504 done = TRUE;
505 }
506 } else {
507 if(priv->count >= 1000) {
508 priv->expanded = FALSE;
509 osd_source_reallocate(osd);
510
511 priv->count = 1000;
512 done = TRUE;
513 }
514 }
515
516
517 /* count runs linearly from 0 to 1000, map this nicely onto a position */
518
519 /* nicer sinoid mapping */
520 float m = 0.5-cos(priv->count * M_PI / 1000.0)/2;
521 priv->shift = (osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X) +
522 m * diff;
523
524 osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
525
526 if(done)
527 priv->handler_id = 0;
528
529 return !done;
530 }
531
532 /* switch between expand and collapse mode of source selection */
533 static void
534 osd_source_toggle(osm_gps_map_osd_t *osd)
535 {
536 osd_priv_t *priv = (osd_priv_t*)osd->priv;
537
538 /* ignore clicks while animation is running */
539 if(priv->handler_id)
540 return;
541
542 /* expand immediately, collapse is handle at the end of the collapse animation */
543 if(!priv->expanded) {
544 priv->expanded = TRUE;
545 osd_source_reallocate(osd);
546
547 priv->count = 1000;
548 priv->shift = osd->widget->allocation.width - OSD_S_W;
549 priv->dir = -1000/OSD_HZ;
550 } else {
551 priv->count = 0;
552 priv->shift = osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
553 priv->dir = +1000/OSD_HZ;
554 }
555
556 priv->handler_id = gtk_timeout_add(OSD_TIME/OSD_HZ, osd_source_animate, osd);
557 }
558
559 /* check if the user clicked inside the source selection area */
560 static osd_button_t
561 osd_source_check(osm_gps_map_osd_t *osd, gint x, gint y) {
562 osd_priv_t *priv = (osd_priv_t*)osd->priv;
563
564 if(!priv->expanded)
565 x -= osd->widget->allocation.width - OSD_S_W;
566 else
567 x -= osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
568
569 if(OSD_S_Y > 0)
570 y -= OSD_S_Y;
571 else
572 y -= osd->widget->allocation.height - OSD_S_PH + OSD_S_Y;
573
574 /* within square around puller? */
575 if(y > 0 && y < OSD_S_PH && x > 0 && x < OSD_S_PW) {
576 /* really within puller shape? */
577 if(x > Z_RAD || osm_gps_map_in_circle(x, y, Z_RAD, Z_RAD, Z_RAD)) {
578 /* expand source selector */
579 osd_source_toggle(osd);
580
581 /* tell upper layers that user clicked some background element */
582 /* of the OSD */
583 return OSD_BG;
584 }
585 }
586
587 /* check for clicks into data area */
588 if(priv->expanded && !priv->handler_id) {
589 /* re-adjust from puller top to content top */
590 if(OSD_S_Y < 0)
591 y += OSD_S_EXP_H - OSD_S_PH;
592
593 if(x > OSD_S_PW &&
594 x < OSD_S_PW + OSD_S_EXP_W &&
595 y > 0 &&
596 y < OSD_S_EXP_H) {
597
598 int step = (priv->height - 2*OSD_TEXT_BORDER)
599 / OSM_GPS_MAP_SOURCE_LAST;
600
601 y -= OSD_TEXT_BORDER - OSD_TEXT_SKIP;
602 y /= step;
603 y += 1;
604
605 gint old = 0;
606 g_object_get(osd->widget, "map-source", &old, NULL);
607
608 if(y > OSM_GPS_MAP_SOURCE_NULL &&
609 y <= OSM_GPS_MAP_SOURCE_LAST &&
610 old != y) {
611 g_object_set(osd->widget, "map-source", y, NULL);
612
613 osd_render_source_sel(osd);
614 osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
615 }
616
617 /* return "clicked in OSD background" to prevent further */
618 /* processing by application */
619 return OSD_BG;
620 }
621 }
622
623 return OSD_NONE;
624 }
625 #endif // OSD_SOURCE_SEL
626
627 static osd_button_t
628 osd_check(osm_gps_map_osd_t *osd, gint x, gint y) {
629 osd_button_t but = OSD_NONE;
630
631 #ifdef OSD_SOURCE_SEL
632 /* the source selection area is handles internally */
633 but = osd_source_check(osd, x, y);
634 if(but != OSD_NONE)
635 return but;
636 #endif
637
638 x -= OSD_X;
639 y -= OSD_Y;
640
641 if(OSD_X < 0)
642 x -= (osd->widget->allocation.width - OSD_W);
643
644 if(OSD_Y < 0)
645 y -= (osd->widget->allocation.height - OSD_H);
646
647 /* first do a rough test for the OSD area. */
648 /* this is just to avoid an unnecessary detailed test */
649 if(x > 0 && x < OSD_W && y > 0 && y < OSD_H) {
650 #ifndef OSD_NO_DPAD
651 but = osd_check_dpad(x, y);
652 #endif
653
654 if(but == OSD_NONE)
655 but = osd_check_zoom(x, y);
656 }
657
658 return but;
659 }
660
661 #ifndef OSD_NO_DPAD
662 static void
663 osd_dpad_labels(cairo_t *cr, gint x, gint y) {
664 /* move reference to dpad center */
665 x += D_RAD;
666 y += D_RAD;
667
668 const static gint offset[][3][2] = {
669 /* left arrow/triangle */
670 { { -D_TIP+D_LEN, -D_WID }, { -D_LEN, D_WID }, { +D_LEN, D_WID } },
671 /* right arrow/triangle */
672 { { +D_TIP-D_LEN, -D_WID }, { +D_LEN, D_WID }, { -D_LEN, D_WID } },
673 /* top arrow/triangle */
674 { { -D_WID, -D_TIP+D_LEN }, { D_WID, -D_LEN }, { D_WID, +D_LEN } },
675 /* bottom arrow/triangle */
676 { { -D_WID, +D_TIP-D_LEN }, { D_WID, +D_LEN }, { D_WID, -D_LEN } }
677 };
678
679 int i;
680 for(i=0;i<4;i++) {
681 cairo_move_to (cr, x + offset[i][0][0], y + offset[i][0][1]);
682 cairo_rel_line_to (cr, offset[i][1][0], offset[i][1][1]);
683 cairo_rel_line_to (cr, offset[i][2][0], offset[i][2][1]);
684 }
685 }
686 #endif
687
688 #ifdef OSD_GPS_BUTTON
689 /* draw the satellite dish icon in the center of the dpad */
690 #define GPS_V0 (D_RAD/7)
691 #define GPS_V1 (D_RAD/10)
692 #define GPS_V2 (D_RAD/5)
693
694 /* draw a satellite receiver dish */
695 /* this is either drawn in the center of the dpad (if present) */
696 /* or in the middle of the zoom area */
697 static void
698 osd_dpad_gps(cairo_t *cr, gint x, gint y) {
699 /* move reference to dpad center */
700 x += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD * 3;
701 y += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD + GPS_V0;
702
703 cairo_move_to (cr, x-GPS_V0, y+GPS_V0);
704 cairo_rel_line_to (cr, +GPS_V0, -GPS_V0);
705 cairo_rel_line_to (cr, +GPS_V0, +GPS_V0);
706 cairo_close_path (cr);
707
708 cairo_move_to (cr, x+GPS_V1-GPS_V2, y-2*GPS_V2);
709 cairo_curve_to (cr, x-GPS_V2, y, x+GPS_V1, y+GPS_V1, x+GPS_V1+GPS_V2, y);
710 cairo_close_path (cr);
711
712 x += GPS_V1;
713 cairo_move_to (cr, x, y-GPS_V2);
714 cairo_rel_line_to (cr, +GPS_V1, -GPS_V1);
715 }
716 #endif
717
718 #define Z_LEN (2*Z_RAD/3)
719
720 static void
721 osd_zoom_labels(cairo_t *cr, gint x, gint y) {
722 cairo_move_to (cr, x + Z_LEFT - Z_LEN, y + Z_MID);
723 cairo_line_to (cr, x + Z_LEFT + Z_LEN, y + Z_MID);
724
725 cairo_move_to (cr, x + Z_RIGHT, y + Z_MID - Z_LEN);
726 cairo_line_to (cr, x + Z_RIGHT, y + Z_MID + Z_LEN);
727 cairo_move_to (cr, x + Z_RIGHT - Z_LEN, y + Z_MID);
728 cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);
729 }
730
731 static float pixel2m(OsmGpsMap *map, int pixel) {
732 return pixel*osm_gps_map_get_scale(OSM_GPS_MAP(map));
733 }
734
735 static void
736 osd_render_scale(osm_gps_map_osd_t *osd)
737 {
738 osd_priv_t *priv = (osd_priv_t*)osd->priv;
739
740 /* first fill with transparency */
741 cairo_t *cr = cairo_create(priv->scale);
742 cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
743 // cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
744 cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.2);
745 cairo_paint(cr);
746 cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
747
748 /* determine the size of the scale width in meters */
749 float width = pixel2m(OSM_GPS_MAP(osd->widget), OSD_SCALE_W);
750 printf("width = %f meters\n", width);
751
752 /* scale this to useful values */
753 int exp = logf(width)*M_LOG10E;
754 int mant = width/pow(10,exp);
755 printf("mant = %d, exp = %d \n", mant, exp);
756
757 cairo_destroy(cr);
758 }
759
760 static void
761 osd_render(osm_gps_map_osd_t *osd)
762 {
763 osd_priv_t *priv = (osd_priv_t*)osd->priv;
764
765 #ifndef OSD_COLOR
766 GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL];
767 GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL];
768 GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE];
769 #endif
770
771 /* first fill with transparency */
772 cairo_t *cr = cairo_create(priv->overlay);
773 cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
774 cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
775 cairo_paint(cr);
776 cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
777
778 /* --------- draw zoom and dpad shape shadow ----------- */
779 #ifdef OSD_SHADOW_ENABLE
780 osd_zoom_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
781 osd_shape_shadow(cr);
782 #ifndef OSD_NO_DPAD
783 osd_dpad_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
784 osd_shape_shadow(cr);
785 #endif
786 #endif
787
788 /* --------- draw zoom and dpad shape ----------- */
789
790 osd_zoom_shape(cr, 1, 1);
791 #ifndef OSD_COLOR
792 osd_shape(cr, &bg, &fg);
793 #else
794 osd_shape(cr);
795 #endif
796 #ifndef OSD_NO_DPAD
797 osd_dpad_shape(cr, 1, 1);
798 #ifndef OSD_COLOR
799 osd_shape(cr, &bg, &fg);
800 #else
801 osd_shape(cr);
802 #endif
803 #endif
804
805 /* --------- draw zoom and dpad labels --------- */
806
807 #ifdef OSD_SHADOW_ENABLE
808 osd_labels_shadow(cr, Z_RAD/3, TRUE);
809 osd_zoom_labels(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
810 #ifndef OSD_NO_DPAD
811 osd_dpad_labels(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
812 #endif
813 cairo_stroke(cr);
814 #ifdef OSD_GPS_BUTTON
815 osd_labels_shadow(cr, Z_RAD/6, osd->cb != NULL);
816 osd_dpad_gps(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
817 cairo_stroke(cr);
818 #endif
819 #endif
820
821 #ifndef OSD_COLOR
822 osd_labels(cr, Z_RAD/3, TRUE, &fg, &da);
823 #else
824 osd_labels(cr, Z_RAD/3, TRUE);
825 #endif
826 osd_zoom_labels(cr, 1, 1);
827 #ifndef OSD_NO_DPAD
828 osd_dpad_labels(cr, 1, 1);
829 #endif
830 cairo_stroke(cr);
831
832 #ifndef OSD_COLOR
833 osd_labels(cr, Z_RAD/6, osd->cb != NULL, &fg, &da);
834 #else
835 osd_labels(cr, Z_RAD/6, osd->cb != NULL);
836 #endif
837 #ifdef OSD_GPS_BUTTON
838 osd_dpad_gps(cr, 1, 1);
839 #endif
840 cairo_stroke(cr);
841
842 cairo_destroy(cr);
843
844 #ifdef OSD_SOURCE_SEL
845 osd_render_source_sel(osd);
846 #endif
847
848 #ifdef OSD_SCALE
849 osd_render_scale(osd);
850 #endif
851 }
852
853 static void
854 osd_draw(osm_gps_map_osd_t *osd, GdkDrawable *drawable)
855 {
856 osd_priv_t *priv = (osd_priv_t*)osd->priv;
857
858 /* OSD itself uses some off-screen rendering, so check if the */
859 /* offscreen buffer is present and create it if not */
860 if(!priv->overlay) {
861 /* create overlay ... */
862 priv->overlay =
863 cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W+2, OSD_H+2);
864
865 #ifdef OSD_SOURCE_SEL
866 /* the initial OSD state is alway not-expanded */
867 priv->map_source =
868 cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
869 OSD_S_W+2, OSD_S_H+2);
870 #endif
871
872 #ifdef OSD_SCALE
873 priv->scale =
874 cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
875 OSD_SCALE_W, OSD_SCALE_H);
876 #endif
877
878 /* ... and render it */
879 osd_render(osd);
880 }
881
882 // now draw this onto the original context
883 cairo_t *cr = gdk_cairo_create(drawable);
884
885 int x = OSD_X, y = OSD_Y;
886 if(OSD_X < 0)
887 x = osd->widget->allocation.width - OSD_W + OSD_X;
888
889 if(OSD_Y < 0)
890 y = osd->widget->allocation.height - OSD_H + OSD_Y;
891
892 cairo_set_source_surface(cr, priv->overlay, x, y);
893 cairo_paint(cr);
894
895 #ifdef OSD_SOURCE_SEL
896 if(!priv->handler_id) {
897 /* the OSD source selection is not being animated */
898 if(!priv->expanded)
899 x = osd->widget->allocation.width - OSD_S_W;
900 else
901 x = osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
902 } else
903 x = priv->shift;
904
905 y = OSD_S_Y;
906 if(OSD_S_Y < 0) {
907 if(!priv->expanded)
908 y = osd->widget->allocation.height - OSD_S_H + OSD_S_Y;
909 else
910 y = osd->widget->allocation.height - OSD_S_EXP_H + OSD_S_Y;
911 }
912
913 cairo_set_source_surface(cr, priv->map_source, x, y);
914 cairo_paint(cr);
915 #endif
916
917 #ifdef OSD_SCALE
918 x = OSD_X;
919 y = -OSD_Y;
920 if(x < 0) x += osd->widget->allocation.width - OSD_SCALE_W;
921 if(y < 0) y += osd->widget->allocation.height - OSD_SCALE_H;
922
923 cairo_set_source_surface(cr, priv->scale, x, y);
924 cairo_paint(cr);
925 #endif
926
927 cairo_destroy(cr);
928 }
929
930 static void
931 osd_free(osm_gps_map_osd_t *osd)
932 {
933 osd_priv_t *priv = (osd_priv_t *)(osd->priv);
934
935 if (priv->overlay)
936 cairo_surface_destroy(priv->overlay);
937
938 #ifdef OSD_SOURCE_SEL
939 if(priv->handler_id)
940 gtk_timeout_remove(priv->handler_id);
941
942 if (priv->map_source)
943 cairo_surface_destroy(priv->map_source);
944 #endif
945
946 #ifdef OSD_SCALE
947 if (priv->scale)
948 cairo_surface_destroy(priv->scale);
949 #endif
950
951 g_free(priv);
952 }
953
954 static gboolean
955 osd_busy(osm_gps_map_osd_t *osd)
956 {
957 #ifdef OSD_SOURCE_SEL
958 osd_priv_t *priv = (osd_priv_t *)(osd->priv);
959 return (priv->handler_id != 0);
960 #else
961 return FALSE;
962 #endif
963 }
964
965 static osm_gps_map_osd_t osd_classic = {
966 .widget = NULL,
967
968 .draw = osd_draw,
969 .check = osd_check,
970 .render = osd_render,
971 .free = osd_free,
972 .busy = osd_busy,
973
974 .cb = NULL,
975 .data = NULL,
976
977 .priv = NULL
978 };
979
980 /* this is the only function that's externally visible */
981 void
982 osm_gps_map_osd_classic_init(OsmGpsMap *map)
983 {
984 osd_priv_t *priv = osd_classic.priv = g_new0(osd_priv_t, 1);
985
986 osd_classic.priv = priv;
987
988 osm_gps_map_register_osd(map, &osd_classic);
989 }
990
991 #ifdef OSD_GPS_BUTTON
992 /* below are osd specific functions which aren't used by osm-gps-map */
993 /* but instead are to be used by the main application */
994 void osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdCallback cb,
995 gpointer data) {
996 osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
997 g_return_if_fail (osd);
998
999 osd->cb = cb;
1000 osd->data = data;
1001
1002 /* this may have changed the state of the gps button */
1003 /* we thus re-render the overlay */
1004 osd->render(osd);
1005
1006 osm_gps_map_redraw(map);
1007 }
1008 #endif
1009
1010 osd_button_t
1011 osm_gps_map_osd_check(OsmGpsMap *map, gint x, gint y) {
1012 osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1013 g_return_val_if_fail (osd, OSD_NONE);
1014
1015 return osd_check(osd, x, y);
1016 }