Contents of /trunk/src/map-tool.c

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Revision 129 - (show annotations)
Tue Sep 29 14:30:16 2009 UTC (14 years, 7 months ago) by harbaum
File MIME type: text/plain
File size: 19958 byte(s) 
BCT cleanup
1 /*
2 * Copyright (C) 2008-2009 Till Harbaum <till@harbaum.org>.
3 *
4 * This file is part of GPXView.
5 *
6 * GPXView is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
10 *
11 * GPXView is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with GPXView. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 /*
21 * http://topo.geofabrik.de/relief/${z}/${x}/${y}.png 8-15
22 * http://topo.geofabrik.de/trail/${z}/${x}/${y}.png 8-15
23 */
24
25 #include "gpxview.h"
26 #include "converter.h"
27 #include <math.h> // for isnan
28
29 #ifdef ENABLE_OSM_GPS_MAP
30 #include "osm-gps-map.h"
31 #include "osm-gps-map-osd-classic.h"
32 #endif
33
34 #if defined(USE_MAEMO) && (MAEMO_VERSION_MAJOR == 5)
35 #include <gdk/gdkx.h>
36 #include <X11/Xatom.h>
37 #endif
38
39 /* default values */
40 #define MAP_SOURCE OSM_GPS_MAP_SOURCE_OPENCYCLEMAP
41 #define GPS_DEFAULT_ZOOM 13
42
43 #define PROXY_KEY "/system/http_proxy/"
44
45 static const char *get_proxy_uri(appdata_t *appdata) {
46 static char proxy_buffer[64] = "";
47
48 /* use environment settings if preset */
49 const char *proxy = g_getenv("http_proxy");
50 if(proxy) {
51 printf("http_proxy: %s\n", proxy);
52 return proxy;
53 }
54
55 /* ------------- get proxy settings -------------------- */
56 if(gconf_client_get_bool(appdata->gconf_client,
57 PROXY_KEY "use_http_proxy", NULL)) {
58
59 /* we can savely ignore things like "ignore_hosts" since we */
60 /* are pretty sure not inside the net of one of our map renderers */
61 /* (unless the user works at google :-) */
62
63 /* get basic settings */
64 char *host =
65 gconf_client_get_string(appdata->gconf_client, PROXY_KEY "host", NULL);
66 if(host) {
67 int port =
68 gconf_client_get_int(appdata->gconf_client, PROXY_KEY "port", NULL);
69
70 snprintf(proxy_buffer, sizeof(proxy_buffer),
71 "http://%s:%u", host, port);
72
73 g_free(host);
74 }
75 return proxy_buffer;
76 }
77
78 return NULL;
79 }
80
81 static void
82 cb_map_gps(osd_button_t but, map_context_t *context) {
83 if(but == OSD_GPS) {
84 pos_t *refpos = get_pos(context->appdata);
85 if(refpos && !isnan(refpos->lat) && !isnan(refpos->lon)) {
86 gint zoom;
87 g_object_get(OSM_GPS_MAP(context->widget), "zoom", &zoom, NULL);
88 if(zoom < 10)
89 osm_gps_map_set_mapcenter(OSM_GPS_MAP(context->widget),
90 refpos->lat, refpos->lon, GPS_DEFAULT_ZOOM);
91 else
92 osm_gps_map_set_center(OSM_GPS_MAP(context->widget),
93 refpos->lat, refpos->lon);
94
95 /* re-enable centering */
96 g_object_set(context->widget, "auto-center", TRUE, NULL);
97 } else {
98 /* no coordinates given: display the entire world */
99 osm_gps_map_set_mapcenter(OSM_GPS_MAP(context->widget),
100 0.0, 0.0, 1);
101 }
102 }
103 }
104
105 static int dist2pixel(map_context_t *context, float km, float lat) {
106 return 1000.0*km/osm_gps_map_get_scale(OSM_GPS_MAP(context->widget));
107 }
108
109 static gboolean map_gps_update(gpointer data) {
110 map_context_t *context = (map_context_t*)data;
111
112 /* get reference position ... */
113 pos_t *refpos = get_pos(context->appdata);
114 gboolean ok = (refpos!= NULL) && !isnan(refpos->lat) && !isnan(refpos->lon);
115
116 /* ... and enable "goto" button if it's valid */
117 osm_gps_map_osd_enable_gps (OSM_GPS_MAP(context->widget),
118 OSM_GPS_MAP_OSD_CALLBACK(ok?cb_map_gps:NULL), context);
119
120 if(ok) {
121 float heading = NAN;
122 int radius = 0;
123
124 if(context->appdata->use_gps) {
125 heading = gps_get_heading(context->appdata);
126
127 /* get error */
128 float eph = gps_get_eph(context->appdata);
129 if(!isnan(eph))
130 radius = dist2pixel(context, eph/1000, refpos->lat);
131 }
132
133 g_object_set(context->widget, "gps-track-highlight-radius", radius, NULL);
134 osm_gps_map_draw_gps(OSM_GPS_MAP(context->widget),
135 refpos->lat, refpos->lon, heading);
136 } else
137 osm_gps_map_clear_gps(OSM_GPS_MAP(context->widget));
138
139 return TRUE;
140 }
141
142 static gboolean on_map_configure(GtkWidget *widget,
143 GdkEventConfigure *event,
144 map_context_t *context) {
145
146 if(!context->map_complete) {
147
148 /* set default values if they are invalid */
149 if(!context->appdata->map.zoom ||
150 isnan(context->appdata->map.pos.lat) ||
151 isnan(context->appdata->map.pos.lon)) {
152 printf("no valid map position found\n");
153
154 pos_t *refpos = get_pos(context->appdata);
155 if(refpos && !isnan(refpos->lat) && !isnan(refpos->lon)) {
156 /* use gps position if present */
157 context->appdata->map.pos = *refpos;
158 context->appdata->map.zoom = GPS_DEFAULT_ZOOM;
159 } else {
160 /* use world map otherwise */
161 context->appdata->map.pos.lat = 0.0;
162 context->appdata->map.pos.lon = 0.0;
163 context->appdata->map.zoom = 1;
164 }
165 }
166
167 /* jump to initial position */
168 osm_gps_map_set_mapcenter(OSM_GPS_MAP(context->widget),
169 context->appdata->map.pos.lat,
170 context->appdata->map.pos.lon,
171 context->appdata->map.zoom);
172 context->map_complete = TRUE;
173 }
174
175 return FALSE;
176 }
177
178 static void map_draw_cache(GtkWidget *map, cache_t *cache) {
179 GdkPixbuf *icon = icon_get(ICON_CACHE_TYPE, cache->type);
180
181 /* check if there's also an overwritten coordinate */
182 if(cache->notes && cache->notes->override) {
183 GdkPixbuf *over = icon_get(ICON_MISC, 1);
184
185 osm_gps_map_add_image(OSM_GPS_MAP(map),
186 cache->notes->pos.lat, cache->notes->pos.lon, icon);
187
188 osm_gps_map_add_image(OSM_GPS_MAP(map),
189 cache->notes->pos.lat, cache->notes->pos.lon, over);
190 } else
191 osm_gps_map_add_image(OSM_GPS_MAP(map),
192 cache->pos.lat, cache->pos.lon, icon);
193
194 }
195
196 static void map_draw_gpx(appdata_t *appdata, GtkWidget *map, gpx_t *gpx) {
197 if(!gpx->notes_loaded) {
198 notes_load_all(appdata, gpx);
199 gpx->notes_loaded = TRUE;
200 }
201
202 cache_t *cache = gpx->cache;
203 while(cache) {
204 map_draw_cache(map, cache);
205 cache = cache->next;
206 }
207 }
208
209 static void
210 map_cachelist_nearest(cache_t *cache, pos_t *pos,
211 cache_t **result, float *distance) {
212 while(cache) {
213 pos_t cpos = gpx_cache_pos(cache);
214
215 float dist =
216 pow(cpos.lat - pos->lat, 2) +
217 pow(cpos.lon - pos->lon, 2);
218
219 if(!(dist > *distance)) {
220 *result = cache;
221 *distance = dist;
222 }
223
224 cache = cache->next;
225 }
226 }
227
228 static cache_t *map_closest(map_context_t *context, pos_t *pos) {
229 cache_t *result = NULL;
230 float distance = NAN;
231
232 if(!context->appdata->cur_gpx && !context->appdata->cur_cache) {
233 /* search all geocaches */
234 gpx_t *gpx = context->appdata->gpx;
235 while(gpx) {
236 map_cachelist_nearest(gpx->cache, pos, &result, &distance);
237 gpx = gpx->next;
238 }
239 } else if(context->appdata->cur_gpx) {
240 map_cachelist_nearest(context->appdata->cur_gpx->cache,
241 pos, &result, &distance);
242 } else
243 result = context->appdata->cur_gpx->cache;
244
245 return result;
246 }
247
248 /* translate between osm-gps-map positions and gpxview ones */
249 pos_t coord2pos(coord_t coo) {
250 pos_t pos;
251 pos.lat = rad2deg(coo.rlat);
252 pos.lon = rad2deg(coo.rlon);
253 return pos;
254 }
255
256 #define CLICK_FUZZ (24)
257
258 static gboolean
259 on_map_button_press_event(GtkWidget *widget,
260 GdkEventButton *event, map_context_t *context) {
261 OsmGpsMap *map = OSM_GPS_MAP(context->widget);
262
263 /* check if we actually clicked parts of the OSD */
264 if(osm_gps_map_osd_check(map, event->x, event->y) != OSD_NONE)
265 return FALSE;
266
267 /* got a press event without release event? eat it! */
268 if(context->press_on != NULL) {
269 printf("PRESS: already\n");
270 return FALSE;
271 }
272
273 pos_t pos =
274 coord2pos(osm_gps_map_get_co_ordinates(map, event->x, event->y));
275
276 cache_t *nearest = map_closest(context, &pos);
277 if(nearest) {
278 pos_t cpos = gpx_cache_pos(nearest);
279
280 float dist = gpx_pos_get_distance(pos, cpos, FALSE);
281 if(dist2pixel(context, dist, cpos.lat) < CLICK_FUZZ)
282 context->press_on = nearest;
283 }
284
285 return FALSE;
286 }
287
288 static void
289 cairo_draw_pixbuf(cairo_t *cr, GdkPixbuf *buf, gint x, gint y) {
290 /* convert the pixbuf into something cairo can handle */
291
292 // Create a new ImageSurface
293 cairo_surface_t *image_surface =
294 cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
295 gdk_pixbuf_get_width(buf),
296 gdk_pixbuf_get_height(buf));
297
298 // Create the new Context for the ImageSurface
299 cairo_t *context = cairo_create(image_surface);
300
301 // Draw the image on the new Context
302 gdk_cairo_set_source_pixbuf(context, buf, 0.0, 0.0);
303 cairo_paint(context);
304
305 // now draw this onto the original context
306 cairo_set_source_surface(cr, image_surface, x, y);
307
308 cairo_paint(cr);
309 }
310
311 #ifndef BIG_BALLOONS
312 #define LINE_SKIP 7
313 #else
314 #define LINE_SKIP 12
315 #endif
316
317 static void
318 balloon_draw_cb(cairo_t *cr, OsmGpsMapRect_t *rect, gpointer data) {
319 cache_t *cache = (cache_t*)data;
320
321 #if 0
322 /* draw pink background to check clipping */
323 cairo_rectangle (cr, rect->x-20, rect->y-20, rect->w+40, rect->h+40);
324 cairo_set_source_rgba (cr, 1, 0, 0, 0.3);
325 cairo_fill_preserve (cr);
326 cairo_set_line_width (cr, 0);
327 cairo_stroke (cr);
328 #endif
329
330 /* leave a little border top and left */
331 gint x = rect->x, y = rect->y;
332
333 /* draw the cache type icon ... */
334 GdkPixbuf *icon = icon_get(ICON_CACHE_TYPE, cache->type);
335 cairo_draw_pixbuf(cr, icon, x, y);
336
337 if(cache->notes && cache->notes->override) {
338 GdkPixbuf *over = icon_get(ICON_MISC, 1);
339 cairo_draw_pixbuf(cr, over, x, y);
340 }
341
342 /* ... and right of it the waypoint id */
343 cairo_text_extents_t extents;
344
345 if(cache->id) {
346 cairo_select_font_face (cr, "Sans",
347 CAIRO_FONT_SLANT_NORMAL,
348 CAIRO_FONT_WEIGHT_BOLD);
349
350 #ifndef BIG_BALLOONS
351 cairo_set_font_size (cr, 20.0);
352 #else
353 cairo_set_font_size (cr, 36.0);
354 #endif
355
356 cairo_text_extents (cr, cache->id, &extents);
357
358 /* display id right of icon vertically centered */
359 x += gdk_pixbuf_get_width(icon) + 5;
360 y += (gdk_pixbuf_get_height(icon) + extents.height)/2;
361 cairo_move_to (cr, x, y);
362 cairo_set_source_rgba (cr, 0, 0, 0, 1);
363 cairo_show_text (cr, cache->id);
364 cairo_stroke (cr);
365
366 y += (gdk_pixbuf_get_height(icon) - extents.height)/2 + LINE_SKIP;
367 } else
368 y += gdk_pixbuf_get_height(icon);
369
370 /* return to the left border and below icon/text */
371 x = rect->x;
372
373 /* everything from here uses the same font */
374 cairo_select_font_face (cr, "Sans", CAIRO_FONT_SLANT_NORMAL,
375 CAIRO_FONT_WEIGHT_NORMAL);
376 #ifndef BIG_BALLOONS
377 cairo_set_font_size (cr, 14.0);
378 #else
379 cairo_set_font_size (cr, 22.0);
380 #endif
381
382 if(cache->name) {
383 /* draw cache name */
384 cairo_text_extents (cr, cache->name, &extents);
385 y += extents.height;
386 cairo_move_to (cr, x, y);
387 cairo_set_source_rgba (cr, 0, 0, 0, 1);
388 cairo_show_text (cr, cache->name);
389 cairo_stroke (cr);
390
391 /* return to the left border and below text */
392 y += LINE_SKIP;
393 x = rect->x;
394 }
395
396 if(cache->terrain) {
397 /* draw cache rating */
398 const char *terrain = "Terrain:";
399 icon = icon_get(ICON_STARS, (int)(cache->terrain*2-2));
400 cairo_text_extents (cr, _(terrain), &extents);
401 y += (gdk_pixbuf_get_height(icon) + extents.height)/2;
402
403 /* draw "Terrain:" string */
404 cairo_move_to (cr, x, y);
405 cairo_set_source_rgba (cr, 0, 0, 0, 1);
406 cairo_show_text (cr, _(terrain));
407 cairo_stroke (cr);
408 x += extents.width + 2;
409
410 /* draw terrain stars */
411 cairo_draw_pixbuf(cr, icon, x, y -
412 (gdk_pixbuf_get_height(icon) + extents.height)/2);
413
414 x += gdk_pixbuf_get_width(icon) + LINE_SKIP;
415 y -= (gdk_pixbuf_get_height(icon) + extents.height)/2;
416 }
417
418 if(cache->difficulty) {
419 const char *difficulty = "Difficulty:";
420 cairo_text_extents (cr, _(difficulty), &extents);
421 y += (gdk_pixbuf_get_height(icon) + extents.height)/2;
422
423 /* draw "Difficulty:" string */
424 cairo_move_to (cr, x, y);
425 cairo_set_source_rgba (cr, 0, 0, 0, 1);
426 cairo_show_text (cr, _(difficulty));
427 cairo_stroke (cr);
428 x += extents.width + 2;
429
430 icon = icon_get(ICON_STARS, (int)(cache->difficulty*2-2));
431 cairo_draw_pixbuf(cr, icon, x, y -
432 (gdk_pixbuf_get_height(icon) + extents.height)/2);
433 }
434 }
435
436 static gboolean
437 on_map_button_release_event(GtkWidget *widget,
438 GdkEventButton *event, map_context_t *context) {
439 OsmGpsMap *map = OSM_GPS_MAP(context->widget);
440
441 if(context->press_on) {
442 coord_t coo;
443 coo = osm_gps_map_get_co_ordinates(map, event->x, event->y);
444
445 pos_t pos =
446 coord2pos(osm_gps_map_get_co_ordinates(map, event->x, event->y));
447
448 cache_t *nearest = map_closest(context, &pos);
449 if(nearest && nearest == context->press_on) {
450 pos_t cpos = gpx_cache_pos(nearest);
451
452 float dist = gpx_pos_get_distance(pos, cpos, FALSE);
453 if(dist2pixel(context, dist, cpos.lat) < CLICK_FUZZ) {
454
455 osm_gps_map_osd_draw_balloon(map, cpos.lat, cpos.lon,
456 balloon_draw_cb, nearest);
457
458 osm_gps_map_osd_draw_nav (map, cpos.lat, cpos.lon, nearest->name);
459
460 }
461 }
462 context->press_on = NULL;
463 } else {
464 /* save new map position */
465 gfloat lat, lon;
466 g_object_get(map, "latitude", &lat, "longitude", &lon, NULL);
467 context->appdata->map.pos.lat = lat;
468 context->appdata->map.pos.lon = lon;
469 }
470
471 return FALSE;
472 }
473
474 static void on_window_destroy(GtkWidget *widget, map_context_t *context) {
475 appdata_t *appdata = context->appdata;
476
477 printf("destroy map window\n");
478
479 /* save map parameters */
480 OsmGpsMap *map = OSM_GPS_MAP(context->widget);
481 gint zoom;
482 g_object_get(map, "zoom", &zoom, NULL);
483 context->appdata->map.zoom = zoom;
484
485 gfloat lat, lon;
486 g_object_get(map, "latitude", &lat, "longitude", &lon, NULL);
487 context->appdata->map.pos.lat = lat;
488 context->appdata->map.pos.lon = lon;
489
490 gint source;
491 g_object_get(map, "map-source", &source, NULL);
492 context->appdata->map.source = source;
493
494 #if MAEMO_VERSION_MAJOR == 5
495 /* restore cur_view */
496 context->appdata->cur_view = context->old_view;
497 #endif
498
499 gtk_timeout_remove(context->handler_id);
500
501 g_free(context);
502 appdata->map.context = NULL;
503 }
504
505 #if (MAEMO_VERSION_MAJOR == 5) && !defined(__i386__)
506 /* get access to zoom buttons */
507 static void
508 on_window_realize(GtkWidget *widget, gpointer data) {
509 if (widget->window) {
510 unsigned char value = 1;
511 Atom hildon_zoom_key_atom =
512 gdk_x11_get_xatom_by_name("_HILDON_ZOOM_KEY_ATOM"),
513 integer_atom = gdk_x11_get_xatom_by_name("INTEGER");
514 Display *dpy =
515 GDK_DISPLAY_XDISPLAY(gdk_drawable_get_display(widget->window));
516 Window w = GDK_WINDOW_XID(widget->window);
517
518 XChangeProperty(dpy, w, hildon_zoom_key_atom,
519 integer_atom, 8, PropModeReplace, &value, 1);
520 }
521 }
522 #endif
523
524 /* draw geocaches and set window title */
525 static void map_setup(map_context_t *context) {
526 char *name = NULL;
527
528 /* clear all existing ccahe images */
529 osm_gps_map_clear_images (OSM_GPS_MAP(context->widget));
530
531 if(!context->appdata->cur_gpx && !context->appdata->cur_cache) {
532 /* draw all geocaches */
533 gpx_t *gpx = context->appdata->gpx;
534 while(gpx) {
535 map_draw_gpx(context->appdata, context->widget, gpx);
536 gpx = gpx->next;
537 }
538 name = g_strdup(_("all"));
539 context->state = MAP_ALL;
540 context->gpx = context->appdata->gpx;
541 } else if(!context->appdata->cur_cache) {
542 map_draw_gpx(context->appdata, context->widget, context->appdata->cur_gpx);
543 name = g_strdup(context->appdata->cur_gpx->name);
544 context->state = MAP_GPX;
545 context->gpx = context->appdata->cur_gpx;
546 } else {
547 map_draw_cache(context->widget, context->appdata->cur_cache);
548 name = g_strdup(context->appdata->cur_cache->name);
549 context->state = MAP_CACHE;
550 context->cache = context->appdata->cur_cache;
551 }
552
553 char *title = g_strdup_printf(_("Map - %s"), name);
554 g_free(name);
555
556 gtk_window_set_title(GTK_WINDOW(context->window), title);
557
558 g_free(title);
559 }
560
561 /* on maemo a window is either on top or completely invisible. this means that */
562 /* we only need to update the map window if its raised. on ordinary desktops this */
563 /* is different and we always update */
564 static gboolean on_focus_in(GtkWidget *widget, GdkEventFocus *event,
565 gpointer data) {
566 map_context_t *context = (map_context_t*)data;
567
568 printf("map focus in!\n");
569
570 return FALSE;
571 }
572
573 void map_update(appdata_t *appdata) {
574 if(appdata->map.context) {
575 printf("map update\n");
576 }
577 }
578
579 void map(appdata_t *appdata) {
580 map_context_t *context = NULL;
581
582 /* if the map window already exists, just raise it */
583 if(appdata->map.context) {
584 printf("using existing map!\n");
585 gtk_window_present(GTK_WINDOW(appdata->map.context->window));
586 map_setup(appdata->map.context);
587 return;
588 }
589
590 context = appdata->map.context = g_new0(map_context_t, 1);
591 context->appdata = appdata;
592 context->map_complete = FALSE;
593
594 /* cleanup old (pre 0.8.7) path if it exists */
595 char *old_path = g_strdup_printf("%s/map/", appdata->image_path);
596 if(g_file_test(old_path, G_FILE_TEST_IS_DIR)) {
597 printf("old file path %s exists\n", old_path);
598 rmdir_recursive(old_path);
599 }
600
601 /* It is recommanded that all applications share these same */
602 /* map path, so data is only cached once. The path should be: */
603 /* ~/.osm-gps-map on standard PC (users home) */
604 /* /home/user/.osm-gps-map on Maemo5 (ext3 on internal card) */
605 /* /media/mmc2/osm-gps-map on Maemo4 (vfat on internal card) */
606 #if !defined(USE_MAEMO)
607 char *p = getenv("HOME");
608 if(!p) p = "/tmp";
609 char *path = g_strdup_printf("%s/.osm-gps-map", p);
610 #else
611 #if MAEMO_VERSION_MAJOR == 5
612 char *path = g_strdup("/home/user/.osm-gps-map");
613 #else
614 char *path = g_strdup("/media/mmc2/osm-gps-map");
615 #endif
616 #endif
617
618 const char *proxy = get_proxy_uri(appdata);
619
620 gint source = context->appdata->map.source;
621 if(!source) source = MAP_SOURCE;
622
623 context->widget = g_object_new(OSM_TYPE_GPS_MAP,
624 "map-source", source,
625 "tile-cache", path,
626 "auto-center", FALSE,
627 "record-trip-history", FALSE,
628 "show-trip-history", FALSE,
629 proxy?"proxy-uri":NULL, proxy,
630 NULL);
631
632 g_free(path);
633
634 osm_gps_map_osd_classic_init(OSM_GPS_MAP(context->widget));
635
636 #ifdef USE_MAEMO
637 /* we don't use a stackable window here on fremantle, since */
638 /* this leaves the main window independent from the map and */
639 /* the user can e.g. still navigate the main menu */
640 context->window = hildon_window_new();
641
642 #if (MAEMO_VERSION_MAJOR == 5) && !defined(__i386__)
643 g_signal_connect(G_OBJECT(context->window), "realize",
644 G_CALLBACK(on_window_realize), NULL);
645 #endif // MAEMO_VERSION
646 #else
647 context->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
648 #endif
649
650 /* setup cache state */
651 map_setup(context);
652
653 #ifndef USE_MAEMO
654 gtk_window_set_default_size(GTK_WINDOW(context->window), 640, 480);
655 #endif
656
657 g_signal_connect(G_OBJECT(context->widget), "focus-in-event",
658 G_CALLBACK(on_focus_in), context);
659
660 g_signal_connect(G_OBJECT(context->widget), "configure-event",
661 G_CALLBACK(on_map_configure), context);
662
663 g_signal_connect(G_OBJECT(context->widget), "button-press-event",
664 G_CALLBACK(on_map_button_press_event), context);
665
666 g_signal_connect(G_OBJECT(context->widget), "button-release-event",
667 G_CALLBACK(on_map_button_release_event), context);
668
669 /* install handler for timed updates of the gps button */
670 context->handler_id = gtk_timeout_add(1000, map_gps_update, context);
671
672 #if MAEMO_VERSION_MAJOR == 5
673 /* prevent some of the main screen things */
674 context->old_view = appdata->cur_view;
675 appdata->cur_view = NULL;
676 #endif
677
678 g_signal_connect(G_OBJECT(context->window), "destroy",
679 G_CALLBACK(on_window_destroy), context);
680
681 gtk_container_add(GTK_CONTAINER(context->window), context->widget);
682 gtk_widget_show_all(GTK_WIDGET(context->window));
683 }