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

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Revision 58 - (show annotations)
Mon Aug 17 10:51:56 2009 UTC (14 years, 8 months ago) by harbaum
File MIME type: text/plain
File size: 14831 byte(s) 
More balloon stuff
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 #include "gpxview.h"
21 #include <math.h> // for isnan
22
23 #ifdef ENABLE_OSM_GPS_MAP
24 #include "osm-gps-map.h"
25 #endif
26
27 #define MAP_SOURCE OSM_GPS_MAP_SOURCE_OPENSTREETMAP
28 #define GPS_DEFAULT_ZOOM 13
29
30 /* equatorial radius in meters */
31 #define EQ_RADIUS (6378137.0)
32
33 #define RAD2DEG(a) (((a)*180.0)/M_PI)
34 #define DEG2RAD(a) (((a)*M_PI)/180.0)
35
36 #define PROXY_KEY "/system/http_proxy/"
37
38 static const char *get_proxy_uri(appdata_t *appdata) {
39 static char proxy_buffer[64] = "";
40
41 /* use environment settings if preset */
42 const char *proxy = g_getenv("http_proxy");
43 if(proxy) {
44 printf("http_proxy: %s\n", proxy);
45 return proxy;
46 }
47
48 /* ------------- get proxy settings -------------------- */
49 if(gconf_client_get_bool(appdata->gconf_client,
50 PROXY_KEY "use_http_proxy", NULL)) {
51
52 /* we can savely ignore things like "ignore_hosts" since we */
53 /* are pretty sure not inside the net of one of our map renderers */
54 /* (unless the user works at google :-) */
55
56 /* get basic settings */
57 char *host =
58 gconf_client_get_string(appdata->gconf_client, PROXY_KEY "host", NULL);
59 if(host) {
60 int port =
61 gconf_client_get_int(appdata->gconf_client, PROXY_KEY "port", NULL);
62
63 snprintf(proxy_buffer, sizeof(proxy_buffer),
64 "http://%s:%u", host, port);
65
66 g_free(host);
67 }
68 return proxy_buffer;
69 }
70
71 return NULL;
72 }
73
74 static void map_zoom(map_context_t *context, int step) {
75 gint zoom;
76 OsmGpsMap *map = OSM_GPS_MAP(context->widget);
77 g_object_get(map, "zoom", &zoom, NULL);
78 zoom = osm_gps_map_set_zoom(map, zoom+step);
79
80 /* enable/disable zoom buttons as required */
81 gtk_widget_set_sensitive(context->zoomin,
82 zoom < osm_gps_map_source_get_max_zoom(MAP_SOURCE));
83 gtk_widget_set_sensitive(context->zoomout,
84 zoom > osm_gps_map_source_get_min_zoom(MAP_SOURCE));
85
86 /* hmm ... this doesn't really work */
87 osm_gps_map_osd_speed(map, zoom);
88
89 /* save new zoom */
90 context->appdata->map.zoom = zoom;
91 }
92
93 static gboolean
94 cb_map_zoomin(GtkButton *button, map_context_t *context) {
95 map_zoom(context, +1);
96 return FALSE;
97 }
98
99 static gboolean
100 cb_map_zoomout(GtkButton *button, map_context_t *context) {
101 map_zoom(context, -1);
102 return FALSE;
103 }
104
105 static gboolean
106 cb_map_gps(GtkButton *button, map_context_t *context) {
107 pos_t *refpos = get_pos(context->appdata);
108 if(refpos && !isnan(refpos->lat) && !isnan(refpos->lon)) {
109 osm_gps_map_set_mapcenter(OSM_GPS_MAP(context->widget),
110 refpos->lat, refpos->lon, GPS_DEFAULT_ZOOM);
111 } else {
112 /* no coordinates given: display the entire world */
113 osm_gps_map_set_mapcenter(OSM_GPS_MAP(context->widget),
114 0.0, 0.0, 1);
115 }
116
117 return FALSE;
118 }
119
120 static GtkWidget
121 *map_add_button(int icon, GCallback cb, gpointer data,
122 char *tooltip) {
123 GtkWidget *button = gtk_button_new();
124 gtk_button_set_image(GTK_BUTTON(button), icon_get_widget(ICON_MISC, icon));
125 g_signal_connect(button, "clicked", cb, data);
126 #ifndef USE_MAEMO
127 gtk_widget_set_tooltip_text(button, tooltip);
128 #endif
129 return button;
130 }
131
132 static int dist2pixel(map_context_t *context, float km, float lat) {
133 return 1000.0*km/osm_gps_map_get_scale(OSM_GPS_MAP(context->widget));
134 }
135
136 static gboolean map_gps_update(gpointer data) {
137 map_context_t *context = (map_context_t*)data;
138
139 /* get reference position ... */
140 pos_t *refpos = get_pos(context->appdata);
141 gboolean ok = (refpos!= NULL) && !isnan(refpos->lat) && !isnan(refpos->lon);
142
143 /* ... and enable "goto" button if it's valid */
144 gtk_widget_set_sensitive(context->gps, ok);
145
146 if(ok) {
147 float heading = NAN;
148 int radius = 0;
149
150 if(context->appdata->use_gps) {
151 heading = gps_get_heading(context->appdata);
152
153 /* get error */
154 float eph = gps_get_eph(context->appdata);
155 if(!isnan(eph))
156 radius = dist2pixel(context, eph/1000, refpos->lat);
157 }
158
159 g_object_set(context->widget, "gps-track-highlight-radius", radius, NULL);
160 osm_gps_map_draw_gps(OSM_GPS_MAP(context->widget),
161 refpos->lat, refpos->lon, heading);
162 } else
163 osm_gps_map_clear_gps(OSM_GPS_MAP(context->widget));
164
165 return TRUE;
166 }
167
168 static gboolean on_map_configure(GtkWidget *widget,
169 GdkEventConfigure *event,
170 map_context_t *context) {
171
172 /* set default values if they are invalid */
173 if(!context->appdata->map.zoom ||
174 isnan(context->appdata->map.pos.lat) ||
175 isnan(context->appdata->map.pos.lon)) {
176 printf("no valid map position found\n");
177
178 pos_t *refpos = get_pos(context->appdata);
179 if(refpos && !isnan(refpos->lat) && !isnan(refpos->lon)) {
180 /* use gps position if present */
181 context->appdata->map.pos = *refpos;
182 context->appdata->map.zoom = GPS_DEFAULT_ZOOM;
183 } else {
184 /* use world map otherwise */
185 context->appdata->map.pos.lat = 0.0;
186 context->appdata->map.pos.lon = 0.0;
187 context->appdata->map.zoom = 1;
188 }
189 }
190
191 /* jump to initial position */
192 osm_gps_map_set_mapcenter(OSM_GPS_MAP(context->widget),
193 context->appdata->map.pos.lat,
194 context->appdata->map.pos.lon,
195 context->appdata->map.zoom);
196
197 return FALSE;
198 }
199
200 static void map_draw_cachelist(GtkWidget *map, cache_t *cache) {
201 while(cache) {
202 GdkPixbuf *icon = icon_get(ICON_CACHE_TYPE, cache->type);
203
204 osm_gps_map_add_image(OSM_GPS_MAP(map),
205 cache->pos.lat, cache->pos.lon, icon);
206
207 cache = cache->next;
208 }
209 }
210
211 static void
212 map_cachelist_nearest(cache_t *cache, pos_t *pos,
213 cache_t **result, float *distance) {
214 while(cache) {
215 float dist =
216 pow(cache->pos.lat - pos->lat, 2) +
217 pow(cache->pos.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 #ifdef USE_MAEMO
233 if(!context->appdata->cur_gpx) {
234 #endif
235 /* search all geocaches */
236 gpx_t *gpx = context->appdata->gpx;
237 while(gpx) {
238 map_cachelist_nearest(gpx->cache, pos, &result, &distance);
239 gpx = gpx->next;
240 }
241 #ifdef USE_MAEMO
242 } else {
243 map_cachelist_nearest(context->appdata->cur_gpx->cache,
244 pos, &result, &distance);
245 }
246 #endif
247
248 return result;
249 }
250
251 /* translate between osm-gps-map positions and gpxview ones */
252 pos_t coord2pos(coord_t coo) {
253 pos_t pos;
254 pos.lat = RAD2DEG(coo.rlat);
255 pos.lon = RAD2DEG(coo.rlon);
256 return pos;
257 }
258
259 #define CLICK_FUZZ (24)
260
261 static gboolean
262 on_map_button_press_event(GtkWidget *widget,
263 GdkEventButton *event, map_context_t *context) {
264 OsmGpsMap *map = OSM_GPS_MAP(context->widget);
265
266 /* got a press event without release event? eat it! */
267 if(context->press_on != NULL) {
268 printf("PRESS: already\n");
269 return TRUE;
270 }
271
272 pos_t pos =
273 coord2pos(osm_gps_map_get_co_ordinates(map, event->x, event->y));
274
275 cache_t *nearest = map_closest(context, &pos);
276 if(nearest) {
277 float dist = gpx_pos_get_distance(pos, nearest->pos, FALSE);
278 if(dist2pixel(context, dist, nearest->pos.lat) < CLICK_FUZZ)
279 context->press_on = nearest;
280 }
281
282 return FALSE;
283 }
284
285 static void
286 cairo_draw_pixbuf(cairo_t *cr, GdkPixbuf *buf, gint x, gint y) {
287 /* convert the pixbuf into something cairo can handle */
288
289 // Create a new ImageSurface
290 cairo_surface_t *image_surface =
291 cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
292 gdk_pixbuf_get_width(buf),
293 gdk_pixbuf_get_height(buf));
294
295 // Create the new Context for the ImageSurface
296 cairo_t *context = cairo_create(image_surface);
297
298 // Draw the image on the new Context
299 gdk_cairo_set_source_pixbuf(context, buf, 0.0, 0.0);
300 cairo_paint(context);
301
302 // now draw this onto the original context
303 cairo_set_source_surface(cr, image_surface, x, y);
304 cairo_paint(cr);
305 }
306
307 static void
308 balloon_draw_cb(cairo_t *cr, OsmGpsMapRect_t *rect, gpointer data) {
309 cache_t *cache = (cache_t*)data;
310
311 // printf("draw cb for \"%s\"\n", cache->name);
312
313 #if 0
314 /* draw pink background to check clipping */
315 cairo_rectangle (cr, rect->x-20, rect->y-20, rect->w+40, rect->h+40);
316 cairo_set_source_rgba (cr, 1, 0, 0, 0.3);
317 cairo_fill_preserve (cr);
318 cairo_set_line_width (cr, 0);
319 cairo_stroke (cr);
320 #endif
321
322 /* leave a little border top and left */
323 gint x = rect->x, y = rect->y;
324
325 /* draw the cache type icon ... */
326 GdkPixbuf *icon = icon_get(ICON_CACHE_TYPE, cache->type);
327 cairo_draw_pixbuf(cr, icon, x, y);
328
329 /* ... and right of it the waypoint id */
330 cairo_text_extents_t extents;
331
332 cairo_select_font_face (cr, "Sans",
333 CAIRO_FONT_SLANT_NORMAL,
334 CAIRO_FONT_WEIGHT_BOLD);
335
336 cairo_set_font_size (cr, 20.0);
337 cairo_text_extents (cr, cache->id, &extents);
338
339 /* draw right of icon vertically centered */
340 x += gdk_pixbuf_get_width(icon) + 5;
341 y += (gdk_pixbuf_get_height(icon) + extents.height)/2;
342
343 cairo_move_to (cr, x,y);
344 printf("trying to draw %s\n", cache->id);
345 cairo_set_source_rgba (cr, 0, 0, 0, 1);
346 cairo_show_text (cr, cache->id);
347 cairo_stroke (cr);
348
349 }
350
351 static gboolean
352 on_map_button_release_event(GtkWidget *widget,
353 GdkEventButton *event, map_context_t *context) {
354 OsmGpsMap *map = OSM_GPS_MAP(context->widget);
355
356 if(context->press_on) {
357 coord_t coo;
358 coo = osm_gps_map_get_co_ordinates(map, event->x, event->y);
359
360 pos_t pos =
361 coord2pos(osm_gps_map_get_co_ordinates(map, event->x, event->y));
362
363 cache_t *nearest = map_closest(context, &pos);
364 if(nearest && nearest == context->press_on) {
365 float dist = gpx_pos_get_distance(pos, nearest->pos, FALSE);
366 if(dist2pixel(context, dist, nearest->pos.lat) < CLICK_FUZZ) {
367
368 osm_gps_map_draw_balloon(map, nearest->pos.lat, nearest->pos.lon,
369 balloon_draw_cb, nearest);
370 }
371 }
372 context->press_on = NULL;
373 } else {
374 /* save new map position */
375 gfloat lat, lon;
376 g_object_get(map, "latitude", &lat, "longitude", &lon, NULL);
377 context->appdata->map.pos.lat = lat;
378 context->appdata->map.pos.lon = lon;
379 }
380
381 return FALSE;
382 }
383
384 static void on_window_destroy(GtkWidget *widget, map_context_t *context) {
385 appdata_t *appdata = context->appdata;
386
387 printf("destroy map window\n");
388
389 /* save map parameters */
390 OsmGpsMap *map = OSM_GPS_MAP(context->widget);
391 gint zoom;
392 g_object_get(map, "zoom", &zoom, NULL);
393 context->appdata->map.zoom = zoom;
394
395 gfloat lat, lon;
396 g_object_get(map, "latitude", &lat, "longitude", &lon, NULL);
397 context->appdata->map.pos.lat = lat;
398 context->appdata->map.pos.lon = lon;
399
400 #if MAEMO_VERSION_MAJOR == 5
401 /* restore cur_view */
402 context->appdata->cur_view = context->old_view;
403 #endif
404
405 gtk_timeout_remove(context->handler_id);
406
407 g_free(context);
408 appdata->map.context = NULL;
409 }
410
411 void map(appdata_t *appdata) {
412 map_context_t *context = NULL;
413
414 /* if the map window already exists, just raise it */
415 if(appdata->map.context) {
416 gtk_window_present(GTK_WINDOW(appdata->map.context->window));
417 return;
418 }
419
420 context = appdata->map.context = g_new0(map_context_t, 1);
421 context->appdata = appdata;
422
423 GtkWidget *hbox = gtk_hbox_new(FALSE, 0);
424
425 char *path = g_strdup_printf("%s/map/", appdata->image_path);
426 const char *proxy = get_proxy_uri(appdata);
427
428 context->widget = g_object_new(OSM_TYPE_GPS_MAP,
429 "map-source", MAP_SOURCE,
430 "tile-cache", path,
431 "auto-center", FALSE,
432 "record-trip-history", FALSE,
433 "show-trip-history", FALSE,
434 proxy?"proxy-uri":NULL, proxy,
435 NULL);
436
437 g_free(path);
438
439 char *name = NULL;
440 #ifdef USE_MAEMO
441 if(!appdata->cur_gpx) {
442 #endif
443 /* draw all geocaches */
444 gpx_t *gpx = appdata->gpx;
445 while(gpx) {
446 map_draw_cachelist(context->widget, gpx->cache);
447 gpx = gpx->next;
448 }
449 name = g_strdup(_("all geocaches"));
450 #ifdef USE_MAEMO
451 } else {
452 map_draw_cachelist(context->widget, appdata->cur_gpx->cache);
453 name = g_strdup(appdata->cur_gpx->name);
454 }
455 #endif
456
457 char *title = g_strdup_printf(_("Map - %s"), name);
458 g_free(name);
459
460 #ifdef USE_MAEMO
461 #ifdef USE_STACKABLE_WINDOW
462 context->window = hildon_stackable_window_new();
463 #else
464 context->window = hildon_window_new();
465 #endif
466 #else
467 context->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
468 #endif
469
470 gtk_window_set_title(GTK_WINDOW(context->window), title);
471
472 #ifndef USE_MAEMO
473 gtk_window_set_default_size(GTK_WINDOW(context->window), 640, 480);
474 #endif
475
476 g_free(title);
477
478 g_signal_connect(G_OBJECT(context->widget), "configure-event",
479 G_CALLBACK(on_map_configure), context);
480
481 g_signal_connect(G_OBJECT(context->widget), "button-press-event",
482 G_CALLBACK(on_map_button_press_event), context);
483
484 g_signal_connect(G_OBJECT(context->widget), "button-release-event",
485 G_CALLBACK(on_map_button_release_event), context);
486
487 gtk_box_pack_start_defaults(GTK_BOX(hbox), context->widget);
488 /* zoom button box */
489 GtkWidget *vbox = gtk_vbox_new(FALSE,0);
490
491 context->zoomin =
492 map_add_button(10, G_CALLBACK(cb_map_zoomin),
493 context, _("Zoom in"));
494 gtk_box_pack_start(GTK_BOX(vbox), context->zoomin, FALSE, FALSE, 0);
495
496 context->zoomout =
497 map_add_button(11, G_CALLBACK(cb_map_zoomout),
498 context, _("Zoom out"));
499 gtk_box_pack_start(GTK_BOX(vbox), context->zoomout, FALSE, FALSE, 0);
500
501 context->gps =
502 map_add_button(9, G_CALLBACK(cb_map_gps),
503 context, _("Jump to GPS position"));
504 gtk_widget_set_sensitive(context->gps, FALSE);
505
506 /* install handler for timed updates of the gps button */
507 context->handler_id = gtk_timeout_add(1000, map_gps_update, context);
508 gtk_box_pack_start(GTK_BOX(vbox), context->gps, FALSE, FALSE, 0);
509
510 gtk_box_pack_start(GTK_BOX(hbox), vbox, FALSE, FALSE, 0);
511
512 #if MAEMO_VERSION_MAJOR == 5
513 /* prevent some of the main screen things */
514 context->old_view = appdata->cur_view;
515 appdata->cur_view = NULL;
516 #endif
517
518 g_signal_connect(G_OBJECT(context->window), "destroy",
519 G_CALLBACK(on_window_destroy), context);
520
521 gtk_container_add(GTK_CONTAINER(context->window), hbox);
522 gtk_widget_show_all(GTK_WIDGET(context->window));
523 }