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

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revision 120 by harbaum, Sat Sep 19 19:19:42 2009 UTC revision 136 by harbaum, Mon Oct 19 13:02:41 2009 UTC
# Line 19  Line 19 
19    
20  #include "config.h"  #include "config.h"
21  #include <stdlib.h>  // abs  #include <stdlib.h>  // abs
22    #include <string.h>
23  #include <math.h>    // M_PI/cos()  #include <math.h>    // M_PI/cos()
24    
25  /* parameters that can be overwritten from the config file: */  /* parameters that can be overwritten from the config file: */
# Line 76  typedef struct { Line 77  typedef struct {
77      } crosshair;      } crosshair;
78  #endif  #endif
79    
80    #ifdef OSD_NAV
81        struct {
82            cairo_surface_t *surface;
83            float lat, lon;
84            char *name;
85            gboolean imperial;    // display distance imperial/metric
86        } nav;
87    #endif
88    
89  #ifdef OSD_COORDINATES  #ifdef OSD_COORDINATES
90      struct {      struct {
91          cairo_surface_t *surface;          cairo_surface_t *surface;
# Line 256  osd_render_balloon(osm_gps_map_osd_t *os Line 266  osd_render_balloon(osm_gps_map_osd_t *os
266      cairo_stroke (cr);      cairo_stroke (cr);
267    
268      if (priv->balloon.cb) {      if (priv->balloon.cb) {
269            osm_gps_map_balloon_event_t event;
270    
271          /* clip in case application tries to draw in */          /* clip in case application tries to draw in */
272              /* exceed of the balloon */              /* exceed of the balloon */
273          cairo_rectangle (cr, priv->balloon.rect.x, priv->balloon.rect.y,          cairo_rectangle (cr, priv->balloon.rect.x, priv->balloon.rect.y,
274                           priv->balloon.rect.w, priv->balloon.rect.h);                           priv->balloon.rect.w, priv->balloon.rect.h);
275          cairo_clip (cr);          cairo_clip (cr);
276          cairo_new_path (cr);  /* current path is not          cairo_new_path (cr);  /* current path is not consumed by cairo_clip */
277                                   consumed by cairo_clip() */  
278            /* request the application to draw the balloon contents */
279            event.type = OSM_GPS_MAP_BALLOON_EVENT_TYPE_DRAW;
280            event.data.draw.rect = &priv->balloon.rect;
281            event.data.draw.cr = cr;
282    
283          priv->balloon.cb(cr, &priv->balloon.rect, priv->balloon.data);          priv->balloon.cb(&event, priv->balloon.data);
284      }      }
285    
286      cairo_destroy(cr);      cairo_destroy(cr);
# Line 273  osd_render_balloon(osm_gps_map_osd_t *os Line 289  osd_render_balloon(osm_gps_map_osd_t *os
289  /* return true if balloon is being displayed and if */  /* return true if balloon is being displayed and if */
290  /* the given coordinate is within this balloon */  /* the given coordinate is within this balloon */
291  static gboolean  static gboolean
292  osd_balloon_check(osm_gps_map_osd_t *osd, gboolean down, gint x, gint y)  osd_balloon_check(osm_gps_map_osd_t *osd, gboolean click, gboolean down, gint x, gint y)
293  {  {
294      osd_priv_t *priv = (osd_priv_t*)osd->priv;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
295    
# Line 285  osd_balloon_check(osm_gps_map_osd_t *osd Line 301  osd_balloon_check(osm_gps_map_osd_t *osd
301                                        priv->balloon.lat, priv->balloon.lon,                                        priv->balloon.lat, priv->balloon.lon,
302                                        &xs, &ys);                                        &xs, &ys);
303    
     printf("click at %d/%d\n", x, y);  
   
304      xs += priv->balloon.rect.x + priv->balloon.offset_x;      xs += priv->balloon.rect.x + priv->balloon.offset_x;
305      ys += priv->balloon.rect.y + priv->balloon.offset_y;      ys += priv->balloon.rect.y + priv->balloon.offset_y;
306    
     printf("balloon at %d/%d/%d/%d\n",  
            xs, ys,  
            xs + priv->balloon.rect.w,  
            ys + priv->balloon.rect.h);  
   
307      gboolean is_in =      gboolean is_in =
308          (x > xs) && (x < xs + priv->balloon.rect.w) &&          (x > xs) && (x < xs + priv->balloon.rect.w) &&
309          (y > ys) && (y < ys + priv->balloon.rect.h);          (y > ys) && (y < ys + priv->balloon.rect.h);
310    
311      /* handle the fact that the balloon may have been created by the */      /* is this a real click or is the application just checking for something? */
312      /* button down event */      if(click) {
     if(!is_in && !down && !priv->balloon.just_created) {  
         /* the user actually clicked outside the balloon */  
313    
314          /* close the balloon! */          /* handle the fact that the balloon may have been created by the */
315          osm_gps_map_osd_clear_balloon (OSM_GPS_MAP(osd->widget));          /* button down event */
316            if(!is_in && !down && !priv->balloon.just_created) {
317                /* the user actually clicked outside the balloon */
318    
319                /* close the balloon! */
320                osm_gps_map_osd_clear_balloon (OSM_GPS_MAP(osd->widget));
321    
322                /* and inform application about this */
323                if(priv->balloon.cb) {
324                    osm_gps_map_balloon_event_t event;
325                    event.type = OSM_GPS_MAP_BALLOON_EVENT_TYPE_REMOVED;
326                    priv->balloon.cb(&event, priv->balloon.data);
327                }
328    
329            }
330    
331            if(is_in && priv->balloon.cb) {
332                osm_gps_map_balloon_event_t event;
333    
334                /* notify application of click */
335                event.type = OSM_GPS_MAP_BALLOON_EVENT_TYPE_CLICK;
336                event.data.click.x = x - xs;
337                event.data.click.y = y - ys;
338                event.data.click.down = down;
339    
340                priv->balloon.cb(&event, priv->balloon.data);
341            }
342      }      }
343    
344      return is_in;      return is_in;
# Line 942  osd_source_check(osm_gps_map_osd_t *osd, Line 975  osd_source_check(osm_gps_map_osd_t *osd,
975  #endif // OSD_SOURCE_SEL  #endif // OSD_SOURCE_SEL
976    
977  static osd_button_t  static osd_button_t
978  osd_check(osm_gps_map_osd_t *osd, gboolean down, gint x, gint y) {  osd_check_int(osm_gps_map_osd_t *osd, gboolean click, gboolean down, gint x, gint y) {
979      osd_button_t but = OSD_NONE;      osd_button_t but = OSD_NONE;
980    
981  #ifdef OSD_BALLOON  #ifdef OSD_BALLOON
# Line 983  osd_check(osm_gps_map_osd_t *osd, gboole Line 1016  osd_check(osm_gps_map_osd_t *osd, gboole
1016  #ifdef OSD_BALLOON  #ifdef OSD_BALLOON
1017      if(but == OSD_NONE) {      if(but == OSD_NONE) {
1018          /* check if user clicked into balloon */          /* check if user clicked into balloon */
1019          if(osd_balloon_check(osd, down, x, y))          if(osd_balloon_check(osd, click, down, x, y))
1020              but = OSD_BG;              but = OSD_BG;
1021      }      }
1022  #endif  #endif
# Line 1070  osd_zoom_labels(cairo_t *cr, gint x, gin Line 1103  osd_zoom_labels(cairo_t *cr, gint x, gin
1103  #define OSD_COORDINATES_OFFSET (OSD_COORDINATES_FONT_SIZE/6)  #define OSD_COORDINATES_OFFSET (OSD_COORDINATES_FONT_SIZE/6)
1104    
1105  #define OSD_COORDINATES_W  (8*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET)  #define OSD_COORDINATES_W  (8*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET)
1106  #define OSD_COORDINATES_H  (2*OSD_COORDINATES_FONT_SIZE+OSD_COORDINATES_OFFSET)  #define OSD_COORDINATES_H  (2*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET+OSD_COORDINATES_FONT_SIZE/4)
1107    
1108  /* these can be overwritten with versions that support */  /* these can be overwritten with versions that support */
1109  /* localization */  /* localization */
# Line 1128  static char Line 1161  static char
1161                             c, (int)integral, fractional*60.0);                             c, (int)integral, fractional*60.0);
1162  }  }
1163    
1164    /* render a string at the given screen position */
1165    static int
1166    osd_render_centered_text(cairo_t *cr, int y, int width, char *text) {
1167        char *p = g_strdup(text);
1168        cairo_text_extents_t extents;
1169        cairo_text_extents (cr, p, &extents);
1170    
1171        /* check if text needs to be truncated */
1172        int len = strlen(text)-2;
1173        while(extents.width > width) {
1174            len--;
1175            strcpy(p+len, "...");
1176            cairo_text_extents (cr, p, &extents);
1177        }
1178    
1179        cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
1180        cairo_set_line_width (cr, OSD_COORDINATES_FONT_SIZE/6);
1181        cairo_move_to (cr, (width - extents.width)/2, y - extents.y_bearing);
1182        cairo_text_path (cr, p);
1183        cairo_stroke (cr);
1184    
1185        cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
1186        cairo_move_to (cr, (width - extents.width)/2, y - extents.y_bearing);
1187        cairo_show_text (cr, p);
1188    
1189        g_free(p);
1190    
1191        /* skip + 1/4 line */
1192        return y + 5*OSD_COORDINATES_FONT_SIZE/4;
1193    }
1194    
1195  static void  static void
1196  osd_render_coordinates(osm_gps_map_osd_t *osd)  osd_render_coordinates(osm_gps_map_osd_t *osd)
1197  {  {
# Line 1163  osd_render_coordinates(osm_gps_map_osd_t Line 1227  osd_render_coordinates(osm_gps_map_osd_t
1227      char *latitude = osd_latitude_str(lat);      char *latitude = osd_latitude_str(lat);
1228      char *longitude = osd_longitude_str(lon);      char *longitude = osd_longitude_str(lon);
1229    
1230      cairo_text_extents_t lat_extents, lon_extents;      int y = OSD_COORDINATES_OFFSET;
1231      cairo_text_extents (cr, latitude, &lat_extents);      y = osd_render_centered_text(cr, y, OSD_COORDINATES_W, latitude);
1232      cairo_text_extents (cr, longitude, &lon_extents);      y = osd_render_centered_text(cr, y, OSD_COORDINATES_W, longitude);
1233    
1234        g_free(latitude);
1235        g_free(longitude);
1236    
1237      cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);      cairo_destroy(cr);
1238      cairo_set_line_width (cr, OSD_COORDINATES_FONT_SIZE/6);  }
1239      cairo_move_to (cr,  #endif  // OSD_COORDINATES
                    (OSD_COORDINATES_W - lat_extents.width)/2,  
                    OSD_COORDINATES_OFFSET - lat_extents.y_bearing);  
     cairo_text_path (cr, latitude);  
     cairo_move_to (cr,  
                    (OSD_COORDINATES_W - lon_extents.width)/2,  
                    OSD_COORDINATES_OFFSET - lon_extents.y_bearing +  
                    OSD_COORDINATES_FONT_SIZE);  
     cairo_text_path (cr, longitude);  
     cairo_stroke (cr);  
1240    
1241      cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);  #ifdef OSD_NAV
1242      cairo_move_to (cr,  #define OSD_NAV_W  (8*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET)
1243                     (OSD_COORDINATES_W - lat_extents.width)/2,  #define OSD_NAV_H  (11*OSD_COORDINATES_FONT_SIZE)
                    OSD_COORDINATES_OFFSET - lat_extents.y_bearing);  
     cairo_show_text (cr, latitude);  
     cairo_move_to (cr,  
                    (OSD_COORDINATES_W - lon_extents.width)/2,  
                    OSD_COORDINATES_OFFSET - lon_extents.y_bearing +  
                    OSD_COORDINATES_FONT_SIZE);  
     cairo_show_text (cr, longitude);  
1244    
1245    /* http://mathforum.org/library/drmath/view/55417.html */
1246    static float get_bearing(float lat1, float lon1, float lat2, float lon2) {
1247      return atan2( sin(lon2 - lon1) * cos(lat2),
1248                    cos(lat1) * sin(lat2) -
1249                    sin(lat1) * cos(lat2) * cos(lon2 - lon1));
1250    }
1251    
1252    /* http://mathforum.org/library/drmath/view/51722.html */
1253    static float get_distance(float lat1, float lon1, float lat2, float lon2) {
1254      float aob = acos(cos(lat1) * cos(lat2) * cos(lon2 - lon1) +
1255                       sin(lat1) * sin(lat2));
1256    
1257      //  return(aob * 3959.0);   /* great circle radius in miles */
1258    
1259      return(aob * 6371000.0);     /* great circle radius in meters */
1260    }
1261    
1262    static void
1263    osd_render_nav(osm_gps_map_osd_t *osd)
1264    {
1265        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1266    
1267        if(!priv->nav.surface || isnan(priv->nav.lat) || isnan(priv->nav.lon))
1268            return;
1269    
1270        /* first fill with transparency */
1271        cairo_t *cr = cairo_create(priv->nav.surface);
1272        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1273        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
1274        cairo_paint(cr);
1275        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1276    
1277        cairo_select_font_face (cr, "Sans",
1278                                CAIRO_FONT_SLANT_NORMAL,
1279                                CAIRO_FONT_WEIGHT_BOLD);
1280        cairo_set_font_size (cr, OSD_COORDINATES_FONT_SIZE);
1281    
1282        char *latitude = osd_latitude_str(priv->nav.lat);
1283        char *longitude = osd_longitude_str(priv->nav.lon);
1284    
1285        int y = OSD_COORDINATES_OFFSET;
1286        y = osd_render_centered_text(cr, y, OSD_NAV_W, priv->nav.name);
1287        y = osd_render_centered_text(cr, y, OSD_NAV_W, latitude);
1288        y = osd_render_centered_text(cr, y, OSD_NAV_W, longitude);
1289    
1290      g_free(latitude);      g_free(latitude);
1291      g_free(longitude);      g_free(longitude);
1292    
1293        /* draw the compass */
1294        int radius = (OSD_NAV_H - y - 5*OSD_COORDINATES_FONT_SIZE/4)/2;
1295        if(radius > OSD_NAV_W/2)
1296            radius = OSD_NAV_W/2;
1297    
1298        int x = OSD_NAV_W/2+1;
1299        y += radius;
1300    
1301        cairo_stroke (cr);
1302    
1303        /* draw background */
1304        cairo_arc(cr, x, y, radius, 0,  2*M_PI);
1305        cairo_set_source_rgba (cr, 1, 1, 1, 0.5);
1306        cairo_fill_preserve (cr);
1307        cairo_set_source_rgb (cr, 0, 0, 0);
1308        cairo_set_line_width (cr, 1);
1309        cairo_stroke (cr);
1310    
1311        /* draw pointer */
1312    #define ARROW_WIDTH     0.3
1313    #define ARROW_LENGTH    0.7
1314    
1315        coord_t *gps = osm_gps_map_get_gps (OSM_GPS_MAP(osd->widget));
1316        if(gps) {
1317            float arot = get_bearing(gps->rlat, gps->rlon,
1318                         deg2rad(priv->nav.lat), deg2rad(priv->nav.lon));
1319    
1320            cairo_move_to(cr,
1321                          x + radius *  ARROW_LENGTH *  sin(arot),
1322                          y + radius *  ARROW_LENGTH * -cos(arot));
1323    
1324            cairo_line_to(cr,
1325                          x + radius * -ARROW_LENGTH *  sin(arot+ARROW_WIDTH),
1326                          y + radius * -ARROW_LENGTH * -cos(arot+ARROW_WIDTH));
1327    
1328            cairo_line_to(cr,
1329                          x + radius * -0.5 * ARROW_LENGTH *  sin(arot),
1330                          y + radius * -0.5 * ARROW_LENGTH * -cos(arot));
1331    
1332            cairo_line_to(cr,
1333                          x + radius * -ARROW_LENGTH *  sin(arot-ARROW_WIDTH),
1334                          y + radius * -ARROW_LENGTH * -cos(arot-ARROW_WIDTH));
1335    
1336            cairo_close_path(cr);
1337            cairo_set_source_rgb (cr, 0, 0, 0);
1338            cairo_fill (cr);
1339    
1340            y += radius + OSD_COORDINATES_FONT_SIZE/4;
1341    
1342            float dist = get_distance(gps->rlat, gps->rlon,
1343                            deg2rad(priv->nav.lat), deg2rad(priv->nav.lon));
1344    
1345            char *dist_str = NULL;
1346            if(!priv->nav.imperial) {
1347                /* metric is easy ... */
1348                if(dist<1000)
1349                    dist_str = g_strdup_printf("%u m", (int)dist);
1350                else
1351                    dist_str = g_strdup_printf("%.1f km", dist/1000);
1352            } else {
1353                /* and now the hard part: scale for useful imperial values :-( */
1354                /* try to convert to feet, 1ft == 0.3048 m */
1355    
1356                if(dist/(3*0.3048) >= 1760.0)      /* more than 1760 yard? */
1357                    dist_str = g_strdup_printf("%.1f mi", dist/(0.3048*3*1760.0));
1358                else if(dist/0.3048 >= 100)        /* more than 100 feet? */
1359                    dist_str = g_strdup_printf("%.1f yd", dist/(0.3048*3));
1360                else
1361                    dist_str = g_strdup_printf("%.0f ft", dist/0.3048);
1362            }
1363    
1364            y = osd_render_centered_text(cr, y, OSD_NAV_W, dist_str);
1365            g_free(dist_str);
1366        }
1367    
1368      cairo_destroy(cr);      cairo_destroy(cr);
1369  }  }
1370  #endif  // OSD_COORDINATES  
1371    void osm_gps_map_osd_clear_nav (OsmGpsMap *map) {
1372        g_return_if_fail (OSM_IS_GPS_MAP (map));
1373    
1374        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1375        g_return_if_fail (osd);
1376    
1377        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1378        g_return_if_fail (priv);
1379    
1380        if(priv->nav.surface) {
1381            cairo_surface_destroy(priv->nav.surface);
1382            priv->nav.surface = NULL;
1383            priv->nav.lat = OSM_GPS_MAP_INVALID;
1384            priv->nav.lon = OSM_GPS_MAP_INVALID;
1385            if(priv->nav.name) g_free(priv->nav.name);
1386        }
1387        osm_gps_map_redraw(map);
1388    }
1389    
1390    void
1391    osm_gps_map_osd_draw_nav (OsmGpsMap *map, gboolean imperial,
1392                              float latitude, float longitude, char *name) {
1393        g_return_if_fail (OSM_IS_GPS_MAP (map));
1394    
1395        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1396        g_return_if_fail (osd);
1397    
1398        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1399        g_return_if_fail (priv);
1400    
1401        osm_gps_map_osd_clear_nav (map);
1402    
1403        /* allocate balloon surface */
1404        priv->nav.surface =
1405            cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1406                                       OSD_NAV_W+2, OSD_NAV_H+2);
1407    
1408        priv->nav.lat = latitude;
1409        priv->nav.lon = longitude;
1410        priv->nav.name = g_strdup(name);
1411        priv->nav.imperial = imperial;
1412    
1413        osd_render_nav(osd);
1414    
1415        osm_gps_map_redraw(map);
1416    }
1417    
1418    #endif // OSD_NAV
1419    
1420    
1421  #ifdef OSD_CROSSHAIR  #ifdef OSD_CROSSHAIR
1422    
# Line 1525  osd_render(osm_gps_map_osd_t *osd) Line 1745  osd_render(osm_gps_map_osd_t *osd)
1745      osd_render_crosshair(osd);      osd_render_crosshair(osd);
1746  #endif  #endif
1747    
1748    #ifdef OSD_NAV
1749        osd_render_nav(osd);
1750    #endif
1751    
1752  #ifdef OSD_COORDINATES  #ifdef OSD_COORDINATES
1753      osd_render_coordinates(osd);      osd_render_coordinates(osd);
1754  #endif  #endif
# Line 1604  osd_draw(osm_gps_map_osd_t *osd, GdkDraw Line 1828  osd_draw(osm_gps_map_osd_t *osd, GdkDraw
1828      cairo_paint(cr);      cairo_paint(cr);
1829  #endif  #endif
1830    
1831    #ifdef OSD_NAV
1832        if(priv->nav.surface) {
1833            x =  OSD_X;
1834            if(x < 0) x += osd->widget->allocation.width - OSD_NAV_W;
1835            y = (osd->widget->allocation.height - OSD_NAV_H)/2;
1836    
1837            cairo_set_source_surface(cr, priv->nav.surface, x, y);
1838            cairo_paint(cr);
1839        }
1840    #endif
1841    
1842  #ifdef OSD_COORDINATES  #ifdef OSD_COORDINATES
1843      x = -OSD_X;      x = -OSD_X;
1844      y = -OSD_Y;      y = -OSD_Y;
# Line 1695  osd_free(osm_gps_map_osd_t *osd) Line 1930  osd_free(osm_gps_map_osd_t *osd)
1930           cairo_surface_destroy(priv->crosshair.surface);           cairo_surface_destroy(priv->crosshair.surface);
1931  #endif  #endif
1932    
1933    #ifdef OSD_NAV
1934        if (priv->nav.surface)
1935             cairo_surface_destroy(priv->nav.surface);
1936    #endif
1937    
1938  #ifdef OSD_COORDINATES  #ifdef OSD_COORDINATES
1939      if (priv->coordinates.surface)      if (priv->coordinates.surface)
1940           cairo_surface_destroy(priv->coordinates.surface);           cairo_surface_destroy(priv->coordinates.surface);
# Line 1719  osd_busy(osm_gps_map_osd_t *osd) Line 1959  osd_busy(osm_gps_map_osd_t *osd)
1959  #endif  #endif
1960  }  }
1961    
1962    static osd_button_t
1963    osd_check(osm_gps_map_osd_t *osd, gboolean down, gint x, gint y) {
1964        return osd_check_int(osd, TRUE, down, x, y);
1965    }
1966    
1967  static osm_gps_map_osd_t osd_classic = {  static osm_gps_map_osd_t osd_classic = {
1968      .widget     = NULL,      .widget     = NULL,
1969    
# Line 1774  osm_gps_map_osd_check(OsmGpsMap *map, gi Line 2019  osm_gps_map_osd_check(OsmGpsMap *map, gi
2019      osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);      osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
2020      g_return_val_if_fail (osd, OSD_NONE);      g_return_val_if_fail (osd, OSD_NONE);
2021    
2022      return osd_check(osd, TRUE, x, y);      return osd_check_int(osd, FALSE, TRUE, x, y);
2023  }  }
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  Added in v.136