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

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revision 121 by harbaum, Sun Sep 20 19:26:29 2009 UTC revision 150 by harbaum, Thu Oct 29 20:25:11 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 125  typedef struct { Line 135  typedef struct {
135    
136  #define CLOSE_BUTTON_RADIUS   (BALLOON_CORNER_RADIUS)  #define CLOSE_BUTTON_RADIUS   (BALLOON_CORNER_RADIUS)
137    
138    #if 0
139    #define FIN   printf("entering function %s\n", __func__);
140    #define FOUT  printf("leaving function %s\n", __func__);
141    #else
142    #define FIN   ;
143    #define FOUT  ;
144    #endif
145    
146  /* draw the bubble shape. this is used twice, once for the shape and once */  /* draw the bubble shape. this is used twice, once for the shape and once */
147  /* for the shadow */  /* for the shadow */
# Line 132  static void Line 149  static void
149  osm_gps_map_draw_balloon_shape (cairo_t *cr, int x0, int y0, int x1, int y1,  osm_gps_map_draw_balloon_shape (cairo_t *cr, int x0, int y0, int x1, int y1,
150         gboolean bottom, int px, int py, int px0, int px1) {         gboolean bottom, int px, int py, int px0, int px1) {
151    
152        FIN;
153    
154      cairo_move_to (cr, x0, y0 + BALLOON_CORNER_RADIUS);      cairo_move_to (cr, x0, y0 + BALLOON_CORNER_RADIUS);
155      cairo_arc (cr, x0 + BALLOON_CORNER_RADIUS, y0 + BALLOON_CORNER_RADIUS,      cairo_arc (cr, x0 + BALLOON_CORNER_RADIUS, y0 + BALLOON_CORNER_RADIUS,
156                 BALLOON_CORNER_RADIUS, -M_PI, -M_PI/2);                 BALLOON_CORNER_RADIUS, -M_PI, -M_PI/2);
# Line 160  osm_gps_map_draw_balloon_shape (cairo_t Line 179  osm_gps_map_draw_balloon_shape (cairo_t
179                 BALLOON_CORNER_RADIUS, M_PI/2, M_PI);                 BALLOON_CORNER_RADIUS, M_PI/2, M_PI);
180    
181      cairo_close_path (cr);      cairo_close_path (cr);
182    
183        FOUT;
184  }  }
185    
186  static void  static void
187  osd_render_balloon(osm_gps_map_osd_t *osd) {  osd_render_balloon(osm_gps_map_osd_t *osd) {
188        FIN;
189    
190      osd_priv_t *priv = (osd_priv_t*)osd->priv;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
191    
192        if(!priv->balloon.surface)
193            return;
194    
195      /* get zoom */      /* get zoom */
196      gint zoom;      gint zoom;
197      g_object_get(OSM_GPS_MAP(osd->widget), "zoom", &zoom, NULL);      g_object_get(OSM_GPS_MAP(osd->widget), "zoom", &zoom, NULL);
# Line 256  osd_render_balloon(osm_gps_map_osd_t *os Line 282  osd_render_balloon(osm_gps_map_osd_t *os
282      cairo_stroke (cr);      cairo_stroke (cr);
283    
284      if (priv->balloon.cb) {      if (priv->balloon.cb) {
285            osm_gps_map_balloon_event_t event;
286    
287          /* clip in case application tries to draw in */          /* clip in case application tries to draw in */
288              /* exceed of the balloon */              /* exceed of the balloon */
289          cairo_rectangle (cr, priv->balloon.rect.x, priv->balloon.rect.y,          cairo_rectangle (cr, priv->balloon.rect.x, priv->balloon.rect.y,
290                           priv->balloon.rect.w, priv->balloon.rect.h);                           priv->balloon.rect.w, priv->balloon.rect.h);
291          cairo_clip (cr);          cairo_clip (cr);
292          cairo_new_path (cr);  /* current path is not          cairo_new_path (cr);  /* current path is not consumed by cairo_clip */
293                                   consumed by cairo_clip() */  
294            /* request the application to draw the balloon contents */
295            event.type = OSM_GPS_MAP_BALLOON_EVENT_TYPE_DRAW;
296            event.data.draw.rect = &priv->balloon.rect;
297            event.data.draw.cr = cr;
298    
299          priv->balloon.cb(cr, &priv->balloon.rect, priv->balloon.data);          priv->balloon.cb(&event, priv->balloon.data);
300      }      }
301    
302      cairo_destroy(cr);      cairo_destroy(cr);
303    
304        FOUT;
305  }  }
306    
307  /* return true if balloon is being displayed and if */  /* return true if balloon is being displayed and if */
308  /* the given coordinate is within this balloon */  /* the given coordinate is within this balloon */
309  static gboolean  static gboolean
310  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)
311  {  {
312        FIN;
313    
314      osd_priv_t *priv = (osd_priv_t*)osd->priv;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
315    
316      if(!priv->balloon.surface)      if(!priv->balloon.surface)
# Line 292  osd_balloon_check(osm_gps_map_osd_t *osd Line 328  osd_balloon_check(osm_gps_map_osd_t *osd
328          (x > xs) && (x < xs + priv->balloon.rect.w) &&          (x > xs) && (x < xs + priv->balloon.rect.w) &&
329          (y > ys) && (y < ys + priv->balloon.rect.h);          (y > ys) && (y < ys + priv->balloon.rect.h);
330    
331      /* 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? */
332      /* button down event */      if(click) {
     if(!is_in && !down && !priv->balloon.just_created) {  
         /* the user actually clicked outside the balloon */  
333    
334          /* close the balloon! */          /* handle the fact that the balloon may have been created by the */
335          osm_gps_map_osd_clear_balloon (OSM_GPS_MAP(osd->widget));          /* button down event */
336      }          if(!is_in && !down && !priv->balloon.just_created) {
337                /* the user actually clicked outside the balloon */
338    
339                /* close the balloon! */
340                osm_gps_map_osd_clear_balloon (OSM_GPS_MAP(osd->widget));
341    
342                /* and inform application about this */
343                if(priv->balloon.cb) {
344                    osm_gps_map_balloon_event_t event;
345                    event.type = OSM_GPS_MAP_BALLOON_EVENT_TYPE_REMOVED;
346                    priv->balloon.cb(&event, priv->balloon.data);
347                }
348    
349            }
350    
351            if(is_in && priv->balloon.cb) {
352                osm_gps_map_balloon_event_t event;
353    
354                /* notify application of click */
355                event.type = OSM_GPS_MAP_BALLOON_EVENT_TYPE_CLICK;
356                event.data.click.x = x - xs;
357                event.data.click.y = y - ys;
358                event.data.click.down = down;
359    
360                priv->balloon.cb(&event, priv->balloon.data);
361            }
362        }
363        FOUT;
364      return is_in;      return is_in;
365  }  }
366    
367  void osm_gps_map_osd_clear_balloon (OsmGpsMap *map) {  void osm_gps_map_osd_clear_balloon (OsmGpsMap *map) {
368        FIN;
369    
370      g_return_if_fail (OSM_IS_GPS_MAP (map));      g_return_if_fail (OSM_IS_GPS_MAP (map));
371    
372      osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);      osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
# Line 320  void osm_gps_map_osd_clear_balloon (OsmG Line 382  void osm_gps_map_osd_clear_balloon (OsmG
382          priv->balloon.lon = OSM_GPS_MAP_INVALID;          priv->balloon.lon = OSM_GPS_MAP_INVALID;
383      }      }
384      osm_gps_map_redraw(map);      osm_gps_map_redraw(map);
385        FOUT;
386  }  }
387    
388  void  void
389  osm_gps_map_osd_draw_balloon (OsmGpsMap *map, float latitude, float longitude,  osm_gps_map_osd_draw_balloon (OsmGpsMap *map, float latitude, float longitude,
390                                OsmGpsMapBalloonCallback cb, gpointer data) {                                OsmGpsMapBalloonCallback cb, gpointer data) {
391        FIN;
392      g_return_if_fail (OSM_IS_GPS_MAP (map));      g_return_if_fail (OSM_IS_GPS_MAP (map));
393    
394      osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);      osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
# Line 351  osm_gps_map_osd_draw_balloon (OsmGpsMap Line 415  osm_gps_map_osd_draw_balloon (OsmGpsMap
415      osd_render_balloon(osd);      osd_render_balloon(osd);
416    
417      osm_gps_map_redraw(map);      osm_gps_map_redraw(map);
418        FOUT;
419  }  }
420    
421  #endif // OSD_BALLOON  #endif // OSD_BALLOON
# Line 495  osd_shape(cairo_t *cr) { Line 560  osd_shape(cairo_t *cr) {
560  static gboolean  static gboolean
561  osm_gps_map_in_circle(gint x, gint y, gint cx, gint cy, gint rad)  osm_gps_map_in_circle(gint x, gint y, gint cx, gint cy, gint rad)
562  {  {
563        FIN;
564      return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad);      return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad);
565  }  }
566    
# Line 585  osd_check_zoom(gint x, gint y) { Line 651  osd_check_zoom(gint x, gint y) {
651  /* internal value to draw the arrow on the "puller" */  /* internal value to draw the arrow on the "puller" */
652  #define OSD_S_D0  (OSD_S_RAD/2)  #define OSD_S_D0  (OSD_S_RAD/2)
653  #ifndef OSD_FONT_SIZE  #ifndef OSD_FONT_SIZE
654  #define OSD_FONT_SIZE 16.0  #define OSD_FONT_SIZE (16.0)
655  #endif  #endif
656  #define OSD_TEXT_BORDER   (OSD_FONT_SIZE/2)  #define OSD_TEXT_BORDER   (OSD_FONT_SIZE/2)
657  #define OSD_TEXT_SKIP     (OSD_FONT_SIZE/8)  #define OSD_TEXT_SKIP     (OSD_FONT_SIZE/8)
# Line 693  osd_source_content(osm_gps_map_osd_t *os Line 759  osd_source_content(osm_gps_map_osd_t *os
759    
760  static void  static void
761  osd_render_source_sel(osm_gps_map_osd_t *osd, gboolean force_rerender) {  osd_render_source_sel(osm_gps_map_osd_t *osd, gboolean force_rerender) {
762        FIN;
763    
764      osd_priv_t *priv = (osd_priv_t*)osd->priv;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
765    
766      if(priv->source_sel.rendered && !force_rerender)      if(!priv->source_sel.surface ||
767           (priv->source_sel.rendered && !force_rerender))
768          return;          return;
769    
770      priv->source_sel.rendered = TRUE;      priv->source_sel.rendered = TRUE;
# Line 739  osd_render_source_sel(osm_gps_map_osd_t Line 808  osd_render_source_sel(osm_gps_map_osd_t
808      cairo_stroke (cr);      cairo_stroke (cr);
809    
810      cairo_destroy(cr);      cairo_destroy(cr);
811        FOUT;
812  }  }
813    
814  /* re-allocate the buffer used to draw the menu. This is used */  /* re-allocate the buffer used to draw the menu. This is used */
815  /* to collapse/expand the buffer */  /* to collapse/expand the buffer */
816  static void  static void
817  osd_source_reallocate(osm_gps_map_osd_t *osd) {  osd_source_reallocate(osm_gps_map_osd_t *osd) {
818        FIN;
819      osd_priv_t *priv = (osd_priv_t*)osd->priv;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
820    
821      /* re-allocate offscreen bitmap */      /* re-allocate offscreen bitmap */
# Line 785  osd_source_reallocate(osm_gps_map_osd_t Line 856  osd_source_reallocate(osm_gps_map_osd_t
856          cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w+2, h+2);          cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w+2, h+2);
857    
858      osd_render_source_sel(osd, TRUE);      osd_render_source_sel(osd, TRUE);
859        FOUT;
860  }  }
861    
862  #define OSD_HZ      15  #define OSD_HZ      15
863  #define OSD_TIME    500  #define OSD_TIME    500
864    
865  static gboolean osd_source_animate(gpointer data) {  static gboolean osd_source_animate(gpointer data) {
866        FIN;
867      osm_gps_map_osd_t *osd = (osm_gps_map_osd_t*)data;      osm_gps_map_osd_t *osd = (osm_gps_map_osd_t*)data;
868      osd_priv_t *priv = (osd_priv_t*)osd->priv;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
869      int diff = OSD_S_EXP_W - OSD_S_W - OSD_S_X;      int diff = OSD_S_EXP_W - OSD_S_W - OSD_S_X;
# Line 829  static gboolean osd_source_animate(gpoin Line 902  static gboolean osd_source_animate(gpoin
902      if(done)      if(done)
903          priv->source_sel.handler_id = 0;          priv->source_sel.handler_id = 0;
904    
905        FOUT;
906      return !done;      return !done;
907  }  }
908    
# Line 836  static gboolean osd_source_animate(gpoin Line 910  static gboolean osd_source_animate(gpoin
910  static void  static void
911  osd_source_toggle(osm_gps_map_osd_t *osd)  osd_source_toggle(osm_gps_map_osd_t *osd)
912  {  {
913        FIN;
914      osd_priv_t *priv = (osd_priv_t*)osd->priv;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
915    
916      /* ignore clicks while animation is running */      /* ignore clicks while animation is running */
# Line 861  osd_source_toggle(osm_gps_map_osd_t *osd Line 936  osd_source_toggle(osm_gps_map_osd_t *osd
936      /* start timer to handle animation */      /* start timer to handle animation */
937      priv->source_sel.handler_id = gtk_timeout_add(OSD_TIME/OSD_HZ,      priv->source_sel.handler_id = gtk_timeout_add(OSD_TIME/OSD_HZ,
938                                                    osd_source_animate, osd);                                                    osd_source_animate, osd);
939        FOUT;
940  }  }
941    
942  /* check if the user clicked inside the source selection area */  /* check if the user clicked inside the source selection area */
943  static osd_button_t  static osd_button_t
944  osd_source_check(osm_gps_map_osd_t *osd, gboolean down, gint x, gint y) {  osd_source_check(osm_gps_map_osd_t *osd, gboolean down, gint x, gint y) {
945        FIN;
946      osd_priv_t *priv = (osd_priv_t*)osd->priv;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
947    
948      if(!priv->source_sel.expanded)      if(!priv->source_sel.expanded)
# Line 923  osd_source_check(osm_gps_map_osd_t *osd, Line 1000  osd_source_check(osm_gps_map_osd_t *osd,
1000                      osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));                      osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
1001                  }                  }
1002              }              }
1003    
1004              /* return "clicked in OSD background" to prevent further */              /* return "clicked in OSD background" to prevent further */
1005              /* processing by application */              /* processing by application */
1006              return OSD_BG;              return OSD_BG;
1007          }          }
1008      }      }
1009    
1010        FOUT;
1011      return OSD_NONE;      return OSD_NONE;
1012  }  }
1013  #endif // OSD_SOURCE_SEL  #endif // OSD_SOURCE_SEL
1014    
1015  static osd_button_t  static osd_button_t
1016  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) {
1017        FIN;
1018      osd_button_t but = OSD_NONE;      osd_button_t but = OSD_NONE;
1019    
1020  #ifdef OSD_BALLOON  #ifdef OSD_BALLOON
# Line 976  osd_check(osm_gps_map_osd_t *osd, gboole Line 1055  osd_check(osm_gps_map_osd_t *osd, gboole
1055  #ifdef OSD_BALLOON  #ifdef OSD_BALLOON
1056      if(but == OSD_NONE) {      if(but == OSD_NONE) {
1057          /* check if user clicked into balloon */          /* check if user clicked into balloon */
1058          if(osd_balloon_check(osd, down, x, y))          if(osd_balloon_check(osd, click, down, x, y))
1059              but = OSD_BG;              but = OSD_BG;
1060      }      }
1061  #endif  #endif
1062    
1063        FOUT;
1064      return but;      return but;
1065  }  }
1066    
# Line 1057  osd_zoom_labels(cairo_t *cr, gint x, gin Line 1137  osd_zoom_labels(cairo_t *cr, gint x, gin
1137  #ifdef OSD_COORDINATES  #ifdef OSD_COORDINATES
1138    
1139  #ifndef OSD_COORDINATES_FONT_SIZE  #ifndef OSD_COORDINATES_FONT_SIZE
1140  #define OSD_COORDINATES_FONT_SIZE 12  #define OSD_COORDINATES_FONT_SIZE (12.0)
1141  #endif  #endif
1142    
1143  #define OSD_COORDINATES_OFFSET (OSD_COORDINATES_FONT_SIZE/6)  #define OSD_COORDINATES_OFFSET (OSD_COORDINATES_FONT_SIZE/6)
1144    
1145  #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)
1146  #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)
1147    
1148  /* these can be overwritten with versions that support */  /* these can be overwritten with versions that support */
1149  /* localization */  /* localization */
# Line 1121  static char Line 1201  static char
1201                             c, (int)integral, fractional*60.0);                             c, (int)integral, fractional*60.0);
1202  }  }
1203    
1204    /* render a string at the given screen position */
1205    static int
1206    osd_render_centered_text(cairo_t *cr, int y, int width, char *text) {
1207        FIN;
1208    
1209        if(!text) return y;
1210    
1211        char *p = g_malloc(strlen(text)+4);  // space for "...\n"
1212        strcpy(p, text);
1213    
1214        cairo_text_extents_t extents;
1215        cairo_text_extents (cr, p, &extents);
1216        g_assert(extents.width != 0.0);
1217    
1218        /* check if text needs to be truncated */
1219        int trunc_at = strlen(text)-1;
1220        while(extents.width > width) {
1221            g_assert(trunc_at > 0);
1222    
1223            trunc_at--;
1224            strcpy(p+trunc_at, "...");
1225            cairo_text_extents (cr, p, &extents);
1226        }
1227    
1228        cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
1229        cairo_set_line_width (cr, OSD_COORDINATES_FONT_SIZE/6);
1230        cairo_move_to (cr, (width - extents.width)/2, y - extents.y_bearing);
1231        cairo_text_path (cr, p);
1232        cairo_stroke (cr);
1233    
1234        cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
1235        cairo_move_to (cr, (width - extents.width)/2, y - extents.y_bearing);
1236        cairo_show_text (cr, p);
1237    
1238        g_free(p);
1239    
1240        /* skip + 1/5 line */
1241        FOUT;
1242        return y + 6*OSD_COORDINATES_FONT_SIZE/5;
1243    }
1244    
1245  static void  static void
1246  osd_render_coordinates(osm_gps_map_osd_t *osd)  osd_render_coordinates(osm_gps_map_osd_t *osd)
1247  {  {
1248        FIN;
1249      osd_priv_t *priv = (osd_priv_t*)osd->priv;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
1250    
1251        if(!priv->coordinates.surface)
1252            return;
1253    
1254      /* get current map position */      /* get current map position */
1255      gfloat lat, lon;      gfloat lat, lon;
1256      g_object_get(osd->widget, "latitude", &lat, "longitude", &lon, NULL);      g_object_get(osd->widget, "latitude", &lat, "longitude", &lon, NULL);
# Line 1141  osd_render_coordinates(osm_gps_map_osd_t Line 1266  osd_render_coordinates(osm_gps_map_osd_t
1266      priv->coordinates.lon = lon;      priv->coordinates.lon = lon;
1267    
1268      /* first fill with transparency */      /* first fill with transparency */
1269    
1270      cairo_t *cr = cairo_create(priv->coordinates.surface);      cairo_t *cr = cairo_create(priv->coordinates.surface);
1271      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1272      //    cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 0.5);      //    cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 0.5);
# Line 1156  osd_render_coordinates(osm_gps_map_osd_t Line 1282  osd_render_coordinates(osm_gps_map_osd_t
1282      char *latitude = osd_latitude_str(lat);      char *latitude = osd_latitude_str(lat);
1283      char *longitude = osd_longitude_str(lon);      char *longitude = osd_longitude_str(lon);
1284    
1285      cairo_text_extents_t lat_extents, lon_extents;      int y = OSD_COORDINATES_OFFSET;
1286      cairo_text_extents (cr, latitude, &lat_extents);      y = osd_render_centered_text(cr, y, OSD_COORDINATES_W, latitude);
1287      cairo_text_extents (cr, longitude, &lon_extents);      y = osd_render_centered_text(cr, y, OSD_COORDINATES_W, longitude);
1288    
1289        g_free(latitude);
1290        g_free(longitude);
1291    
1292      cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);      cairo_destroy(cr);
1293      cairo_set_line_width (cr, OSD_COORDINATES_FONT_SIZE/6);      FOUT;
1294      cairo_move_to (cr,  }
1295                     (OSD_COORDINATES_W - lat_extents.width)/2,  #endif  // OSD_COORDINATES
                    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);  
1296    
1297      cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);  #ifdef OSD_NAV
1298      cairo_move_to (cr,  #define OSD_NAV_W  (8*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET)
1299                     (OSD_COORDINATES_W - lat_extents.width)/2,  #define OSD_NAV_H  (11*OSD_COORDINATES_FONT_SIZE)
1300                     OSD_COORDINATES_OFFSET - lat_extents.y_bearing);  
1301      cairo_show_text (cr, latitude);  /* http://mathforum.org/library/drmath/view/55417.html */
1302      cairo_move_to (cr,  static float get_bearing(float lat1, float lon1, float lat2, float lon2) {
1303                     (OSD_COORDINATES_W - lon_extents.width)/2,    return atan2( sin(lon2 - lon1) * cos(lat2),
1304                     OSD_COORDINATES_OFFSET - lon_extents.y_bearing +                  cos(lat1) * sin(lat2) -
1305                     OSD_COORDINATES_FONT_SIZE);                  sin(lat1) * cos(lat2) * cos(lon2 - lon1));
1306      cairo_show_text (cr, longitude);  }
1307    
1308    /* http://mathforum.org/library/drmath/view/51722.html */
1309    static float get_distance(float lat1, float lon1, float lat2, float lon2) {
1310      float aob = acos(cos(lat1) * cos(lat2) * cos(lon2 - lon1) +
1311                       sin(lat1) * sin(lat2));
1312    
1313      //  return(aob * 3959.0);   /* great circle radius in miles */
1314    
1315      return(aob * 6371000.0);     /* great circle radius in meters */
1316    }
1317    
1318    static void
1319    osd_render_nav(osm_gps_map_osd_t *osd)
1320    {
1321        FIN;
1322        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1323    
1324        if(!priv->nav.surface || isnan(priv->nav.lat) || isnan(priv->nav.lon))
1325            return;
1326    
1327        /* first fill with transparency */
1328        cairo_t *cr = cairo_create(priv->nav.surface);
1329        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1330        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
1331        cairo_paint(cr);
1332        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1333    
1334        cairo_select_font_face (cr, "Sans",
1335                                CAIRO_FONT_SLANT_NORMAL,
1336                                CAIRO_FONT_WEIGHT_BOLD);
1337        cairo_set_font_size (cr, OSD_COORDINATES_FONT_SIZE);
1338    
1339        char *latitude = osd_latitude_str(priv->nav.lat);
1340        char *longitude = osd_longitude_str(priv->nav.lon);
1341    
1342        int y = OSD_COORDINATES_OFFSET;
1343        y = osd_render_centered_text(cr, y, OSD_NAV_W, priv->nav.name);
1344        y = osd_render_centered_text(cr, y, OSD_NAV_W, latitude);
1345        y = osd_render_centered_text(cr, y, OSD_NAV_W, longitude);
1346    
1347      g_free(latitude);      g_free(latitude);
1348      g_free(longitude);      g_free(longitude);
1349    
1350        /* draw the compass */
1351        int radius = (OSD_NAV_H - y - 5*OSD_COORDINATES_FONT_SIZE/4)/2;
1352        if(radius > OSD_NAV_W/2)
1353            radius = OSD_NAV_W/2;
1354    
1355        int x = OSD_NAV_W/2+1;
1356        y += radius;
1357    
1358        cairo_stroke (cr);
1359    
1360        /* draw background */
1361        cairo_arc(cr, x, y, radius, 0,  2*M_PI);
1362        cairo_set_source_rgba (cr, 1, 1, 1, 0.5);
1363        cairo_fill_preserve (cr);
1364        cairo_set_source_rgb (cr, 0, 0, 0);
1365        cairo_set_line_width (cr, 1);
1366        cairo_stroke (cr);
1367    
1368        /* draw pointer */
1369    #define ARROW_WIDTH     0.3
1370    #define ARROW_LENGTH    0.7
1371    
1372        coord_t *gps = osm_gps_map_get_gps (OSM_GPS_MAP(osd->widget));
1373        if(gps) {
1374            float arot = get_bearing(gps->rlat, gps->rlon,
1375                         deg2rad(priv->nav.lat), deg2rad(priv->nav.lon));
1376    
1377            cairo_move_to(cr,
1378                          x + radius *  ARROW_LENGTH *  sin(arot),
1379                          y + radius *  ARROW_LENGTH * -cos(arot));
1380    
1381            cairo_line_to(cr,
1382                          x + radius * -ARROW_LENGTH *  sin(arot+ARROW_WIDTH),
1383                          y + radius * -ARROW_LENGTH * -cos(arot+ARROW_WIDTH));
1384    
1385            cairo_line_to(cr,
1386                          x + radius * -0.5 * ARROW_LENGTH *  sin(arot),
1387                          y + radius * -0.5 * ARROW_LENGTH * -cos(arot));
1388    
1389            cairo_line_to(cr,
1390                          x + radius * -ARROW_LENGTH *  sin(arot-ARROW_WIDTH),
1391                          y + radius * -ARROW_LENGTH * -cos(arot-ARROW_WIDTH));
1392    
1393            cairo_close_path(cr);
1394            cairo_set_source_rgb (cr, 0, 0, 0);
1395            cairo_fill (cr);
1396    
1397            y += radius + OSD_COORDINATES_FONT_SIZE/4;
1398    
1399            float dist = get_distance(gps->rlat, gps->rlon,
1400                            deg2rad(priv->nav.lat), deg2rad(priv->nav.lon));
1401    
1402            char *dist_str = NULL;
1403            if(!priv->nav.imperial) {
1404                /* metric is easy ... */
1405                if(dist<1000)
1406                    dist_str = g_strdup_printf("%u m", (int)dist);
1407                else
1408                    dist_str = g_strdup_printf("%.1f km", dist/1000);
1409            } else {
1410                /* and now the hard part: scale for useful imperial values :-( */
1411                /* try to convert to feet, 1ft == 0.3048 m */
1412    
1413                if(dist/(3*0.3048) >= 1760.0)      /* more than 1760 yard? */
1414                    dist_str = g_strdup_printf("%.1f mi", dist/(0.3048*3*1760.0));
1415                else if(dist/0.3048 >= 100)        /* more than 100 feet? */
1416                    dist_str = g_strdup_printf("%.1f yd", dist/(0.3048*3));
1417                else
1418                    dist_str = g_strdup_printf("%.0f ft", dist/0.3048);
1419            }
1420    
1421            y = osd_render_centered_text(cr, y, OSD_NAV_W, dist_str);
1422            g_free(dist_str);
1423        }
1424    
1425      cairo_destroy(cr);      cairo_destroy(cr);
1426        FOUT;
1427  }  }
1428  #endif  // OSD_COORDINATES  
1429    void osm_gps_map_osd_clear_nav (OsmGpsMap *map) {
1430        FIN;
1431        g_return_if_fail (OSM_IS_GPS_MAP (map));
1432    
1433        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1434        g_return_if_fail (osd);
1435    
1436        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1437        g_return_if_fail (priv);
1438    
1439        if(priv->nav.surface) {
1440            cairo_surface_destroy(priv->nav.surface);
1441            priv->nav.surface = NULL;
1442            priv->nav.lat = OSM_GPS_MAP_INVALID;
1443            priv->nav.lon = OSM_GPS_MAP_INVALID;
1444            if(priv->nav.name) g_free(priv->nav.name);
1445        }
1446        osm_gps_map_redraw(map);
1447        FOUT;
1448    }
1449    
1450    void
1451    osm_gps_map_osd_draw_nav (OsmGpsMap *map, gboolean imperial,
1452                              float latitude, float longitude, char *name) {
1453        FIN;
1454        g_return_if_fail (OSM_IS_GPS_MAP (map));
1455    
1456        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1457        g_return_if_fail (osd);
1458    
1459        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1460        g_return_if_fail (priv);
1461    
1462        osm_gps_map_osd_clear_nav (map);
1463    
1464        /* allocate balloon surface */
1465        priv->nav.surface =
1466            cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1467                                       OSD_NAV_W+2, OSD_NAV_H+2);
1468    
1469        priv->nav.lat = latitude;
1470        priv->nav.lon = longitude;
1471        priv->nav.name = g_strdup(name);
1472        priv->nav.imperial = imperial;
1473    
1474        osd_render_nav(osd);
1475    
1476        osm_gps_map_redraw(map);
1477        FOUT;
1478    }
1479    
1480    #endif // OSD_NAV
1481    
1482    
1483  #ifdef OSD_CROSSHAIR  #ifdef OSD_CROSSHAIR
1484    
# Line 1204  osd_render_coordinates(osm_gps_map_osd_t Line 1493  osd_render_coordinates(osm_gps_map_osd_t
1493    
1494  static void  static void
1495  osd_render_crosshair_shape(cairo_t *cr) {  osd_render_crosshair_shape(cairo_t *cr) {
1496        FIN;
1497      cairo_arc (cr, OSD_CROSSHAIR_W/2, OSD_CROSSHAIR_H/2,      cairo_arc (cr, OSD_CROSSHAIR_W/2, OSD_CROSSHAIR_H/2,
1498                 OSD_CROSSHAIR_RADIUS, 0,  2*M_PI);                 OSD_CROSSHAIR_RADIUS, 0,  2*M_PI);
1499    
# Line 1222  osd_render_crosshair_shape(cairo_t *cr) Line 1512  osd_render_crosshair_shape(cairo_t *cr)
1512      cairo_rel_line_to (cr, 0, OSD_CROSSHAIR_TICK);      cairo_rel_line_to (cr, 0, OSD_CROSSHAIR_TICK);
1513    
1514      cairo_stroke (cr);      cairo_stroke (cr);
1515        FOUT;
1516  }  }
1517    
1518  static void  static void
1519  osd_render_crosshair(osm_gps_map_osd_t *osd)  osd_render_crosshair(osm_gps_map_osd_t *osd)
1520  {  {
1521        FIN;
1522      osd_priv_t *priv = (osd_priv_t*)osd->priv;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
1523    
1524      if(priv->crosshair.rendered)      if(!priv->crosshair.surface || priv->crosshair.rendered)
1525          return;          return;
1526    
1527      priv->crosshair.rendered = TRUE;      priv->crosshair.rendered = TRUE;
# Line 1252  osd_render_crosshair(osm_gps_map_osd_t * Line 1544  osd_render_crosshair(osm_gps_map_osd_t *
1544      osd_render_crosshair_shape(cr);      osd_render_crosshair_shape(cr);
1545    
1546      cairo_destroy(cr);      cairo_destroy(cr);
1547        FOUT;
1548  }  }
1549  #endif  #endif
1550    
1551  #ifdef OSD_SCALE  #ifdef OSD_SCALE
1552    
1553  #ifndef OSD_SCALE_FONT_SIZE  #ifndef OSD_SCALE_FONT_SIZE
1554  #define OSD_SCALE_FONT_SIZE 12  #define OSD_SCALE_FONT_SIZE (12.0)
1555  #endif  #endif
1556  #define OSD_SCALE_W   (10*OSD_SCALE_FONT_SIZE)  #define OSD_SCALE_W   (10*OSD_SCALE_FONT_SIZE)
1557  #define OSD_SCALE_H   (5*OSD_SCALE_FONT_SIZE/2)  #define OSD_SCALE_H   (5*OSD_SCALE_FONT_SIZE/2)
# Line 1273  osd_render_crosshair(osm_gps_map_osd_t * Line 1566  osd_render_crosshair(osm_gps_map_osd_t *
1566  static void  static void
1567  osd_render_scale(osm_gps_map_osd_t *osd)  osd_render_scale(osm_gps_map_osd_t *osd)
1568  {  {
1569        FIN;
1570      osd_priv_t *priv = (osd_priv_t*)osd->priv;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
1571    
1572        if(!priv->scale.surface)
1573            return;
1574    
1575      /* this only needs to be rendered if the zoom has changed */      /* this only needs to be rendered if the zoom has changed */
1576      gint zoom;      gint zoom;
1577      g_object_get(OSM_GPS_MAP(osd->widget), "zoom", &zoom, NULL);      g_object_get(OSM_GPS_MAP(osd->widget), "zoom", &zoom, NULL);
# Line 1396  osd_render_scale(osm_gps_map_osd_t *osd) Line 1693  osd_render_scale(osm_gps_map_osd_t *osd)
1693      cairo_stroke(cr);      cairo_stroke(cr);
1694    
1695      cairo_destroy(cr);      cairo_destroy(cr);
1696        FOUT;
1697  }  }
1698  #endif  #endif
1699    
1700  static void  static void
1701  osd_render_controls(osm_gps_map_osd_t *osd)  osd_render_controls(osm_gps_map_osd_t *osd)
1702  {  {
1703        FIN;
1704      osd_priv_t *priv = (osd_priv_t*)osd->priv;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
1705    
1706        if(!priv->controls.surface)
1707            return;
1708    
1709      if(priv->controls.rendered      if(priv->controls.rendered
1710  #ifdef OSD_GPS_BUTTON  #ifdef OSD_GPS_BUTTON
1711         && (priv->controls.gps_enabled == (osd->cb != NULL))         && (priv->controls.gps_enabled == (osd->cb != NULL))
# Line 1518  osd_render(osm_gps_map_osd_t *osd) Line 1820  osd_render(osm_gps_map_osd_t *osd)
1820      osd_render_crosshair(osd);      osd_render_crosshair(osd);
1821  #endif  #endif
1822    
1823    #ifdef OSD_NAV
1824        osd_render_nav(osd);
1825    #endif
1826    
1827  #ifdef OSD_COORDINATES  #ifdef OSD_COORDINATES
1828      osd_render_coordinates(osd);      osd_render_coordinates(osd);
1829  #endif  #endif
# Line 1597  osd_draw(osm_gps_map_osd_t *osd, GdkDraw Line 1903  osd_draw(osm_gps_map_osd_t *osd, GdkDraw
1903      cairo_paint(cr);      cairo_paint(cr);
1904  #endif  #endif
1905    
1906    #ifdef OSD_NAV
1907        if(priv->nav.surface) {
1908            x =  OSD_X;
1909            if(x < 0) x += osd->widget->allocation.width - OSD_NAV_W;
1910            y = (osd->widget->allocation.height - OSD_NAV_H)/2;
1911    
1912            cairo_set_source_surface(cr, priv->nav.surface, x, y);
1913            cairo_paint(cr);
1914        }
1915    #endif
1916    
1917  #ifdef OSD_COORDINATES  #ifdef OSD_COORDINATES
1918      x = -OSD_X;      x = -OSD_X;
1919      y = -OSD_Y;      y = -OSD_Y;
# Line 1660  osd_draw(osm_gps_map_osd_t *osd, GdkDraw Line 1977  osd_draw(osm_gps_map_osd_t *osd, GdkDraw
1977  #endif  #endif
1978    
1979      cairo_destroy(cr);      cairo_destroy(cr);
1980        FOUT;
1981  }  }
1982    
1983  static void  static void
1984  osd_free(osm_gps_map_osd_t *osd)  osd_free(osm_gps_map_osd_t *osd)
1985  {  {
1986        FIN;
1987      osd_priv_t *priv = (osd_priv_t *)(osd->priv);      osd_priv_t *priv = (osd_priv_t *)(osd->priv);
1988    
1989      if (priv->controls.surface)      if (priv->controls.surface)
# Line 1688  osd_free(osm_gps_map_osd_t *osd) Line 2007  osd_free(osm_gps_map_osd_t *osd)
2007           cairo_surface_destroy(priv->crosshair.surface);           cairo_surface_destroy(priv->crosshair.surface);
2008  #endif  #endif
2009    
2010    #ifdef OSD_NAV
2011        if (priv->nav.surface)
2012             cairo_surface_destroy(priv->nav.surface);
2013    #endif
2014    
2015  #ifdef OSD_COORDINATES  #ifdef OSD_COORDINATES
2016      if (priv->coordinates.surface)      if (priv->coordinates.surface)
2017           cairo_surface_destroy(priv->coordinates.surface);           cairo_surface_destroy(priv->coordinates.surface);
# Line 1699  osd_free(osm_gps_map_osd_t *osd) Line 2023  osd_free(osm_gps_map_osd_t *osd)
2023  #endif  #endif
2024    
2025      g_free(priv);      g_free(priv);
2026        FOUT;
2027  }  }
2028    
2029  static gboolean  static gboolean
2030  osd_busy(osm_gps_map_osd_t *osd)  osd_busy(osm_gps_map_osd_t *osd)
2031  {  {
2032        FIN;
2033  #ifdef OSD_SOURCE_SEL  #ifdef OSD_SOURCE_SEL
2034      osd_priv_t *priv = (osd_priv_t *)(osd->priv);      osd_priv_t *priv = (osd_priv_t *)(osd->priv);
2035      return (priv->source_sel.handler_id != 0);      return (priv->source_sel.handler_id != 0);
# Line 1712  osd_busy(osm_gps_map_osd_t *osd) Line 2038  osd_busy(osm_gps_map_osd_t *osd)
2038  #endif  #endif
2039  }  }
2040    
2041    static osd_button_t
2042    osd_check(osm_gps_map_osd_t *osd, gboolean down, gint x, gint y) {
2043        FIN;
2044        return osd_check_int(osd, TRUE, down, x, y);
2045    }
2046    
2047  static osm_gps_map_osd_t osd_classic = {  static osm_gps_map_osd_t osd_classic = {
2048      .widget     = NULL,      .widget     = NULL,
2049    
# Line 1731  static osm_gps_map_osd_t osd_classic = { Line 2063  static osm_gps_map_osd_t osd_classic = {
2063  void  void
2064  osm_gps_map_osd_classic_init(OsmGpsMap *map)  osm_gps_map_osd_classic_init(OsmGpsMap *map)
2065  {  {
2066        FIN;
2067      osd_priv_t *priv = osd_classic.priv = g_new0(osd_priv_t, 1);      osd_priv_t *priv = osd_classic.priv = g_new0(osd_priv_t, 1);
2068    
2069  #ifdef OSD_BALLOON  #ifdef OSD_BALLOON
# Line 1741  osm_gps_map_osd_classic_init(OsmGpsMap * Line 2074  osm_gps_map_osd_classic_init(OsmGpsMap *
2074      osd_classic.priv = priv;      osd_classic.priv = priv;
2075    
2076      osm_gps_map_register_osd(map, &osd_classic);      osm_gps_map_register_osd(map, &osd_classic);
2077        FOUT;
2078  }  }
2079    
2080  #ifdef OSD_GPS_BUTTON  #ifdef OSD_GPS_BUTTON
# Line 1748  osm_gps_map_osd_classic_init(OsmGpsMap * Line 2082  osm_gps_map_osd_classic_init(OsmGpsMap *
2082  /* but instead are to be used by the main application */  /* but instead are to be used by the main application */
2083  void osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdCallback cb,  void osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdCallback cb,
2084                                   gpointer data) {                                   gpointer data) {
2085        FIN;
2086      osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);      osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
2087      g_return_if_fail (osd);      g_return_if_fail (osd);
2088    
# Line 1759  void osm_gps_map_osd_enable_gps (OsmGpsM Line 2094  void osm_gps_map_osd_enable_gps (OsmGpsM
2094      osd->render(osd);      osd->render(osd);
2095    
2096      osm_gps_map_redraw(map);      osm_gps_map_redraw(map);
2097        FOUT;
2098  }  }
2099  #endif  #endif
2100    
2101  osd_button_t  osd_button_t
2102  osm_gps_map_osd_check(OsmGpsMap *map, gint x, gint y) {  osm_gps_map_osd_check(OsmGpsMap *map, gint x, gint y) {
2103        FIN;
2104      osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);      osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
2105      g_return_val_if_fail (osd, OSD_NONE);      g_return_val_if_fail (osd, OSD_NONE);
2106    
2107      return osd_check(osd, TRUE, x, y);      return osd_check_int(osd, FALSE, TRUE, x, y);
2108  }  }
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  Added in v.150