/* the contents of the map tab have been changed */
static void map_update(area_context_t *context, bool forced) {
/* map is first tab (page 0) */
if(!forced && !current_tab_is(context, TAB_LABEL_MAP)) {
g_debug("schedule map redraw");
context->map.needs_redraw = true;
return;
}
g_debug("do map redraw");
/* check if the position is invalid */
if(!context->bounds.valid()) {
/* no coordinates given: display around the current GPS position if available */
pos_t pos = context->area.gps_state->get_pos();
int zoom = 12;
if(!pos.valid()) {
/* no GPS position available: display the entire world */
pos.lat = 0.0;
pos.lon = 0.0;
zoom = 1;
}
osm_gps_map_set_center_and_zoom(context->map.widget, pos.lat, pos.lon, zoom);
osm_gps_map_track_remove_all(context->map.widget);
} else {
osm_gps_map_set_center(context->map.widget, context->bounds.centerLat(),
context->bounds.centerLon());
/* we know the widgets pixel size, we know the required real size, */
/* we want the zoom! */
GtkWidget *wd = GTK_WIDGET(context->map.widget);
double vzoom = wd->allocation.height / context->bounds.latDist();
double hzoom = wd->allocation.width / context->bounds.lonDist();
/* use smallest zoom, so everything fits on screen */
osm_gps_map_set_zoom(context->map.widget,
log2((45.0 / 32.0) * std::min(vzoom, hzoom)) - 1);
/* ---------- draw border (as a gps track) -------------- */
osm_gps_map_track_remove_all(context->map.widget);
if(context->bounds.normalized()) {
GSList *box = pos_append(nullptr, context->bounds.min.lat, context->bounds.min.lon);
box = pos_append(box, context->bounds.max.lat, context->bounds.min.lon);
box = pos_append(box, context->bounds.max.lat, context->bounds.max.lon);
box = pos_append(box, context->bounds.min.lat, context->bounds.max.lon);
box = pos_append(box, context->bounds.min.lat, context->bounds.min.lon);
osm_gps_map_add_track(context->map.widget, box);
}
}
// show all other bounds
std::for_each(context->area.other_bounds.begin(), context->area.other_bounds.end(),
add_bounds(context->map.widget));
context->map.needs_redraw = false;
}
static gboolean
on_map_motion_notify_event(GtkWidget *widget,
GdkEventMotion *event, area_context_t *context) {
OsmGpsMap *map = OSM_GPS_MAP(widget);
if(!std::isnan(context->map.start.rlon) &&
!std::isnan(context->map.start.rlat)) {
/* remove existing marker */
osm_gps_map_track_remove_all(map);
OsmGpsMapPoint start = context->map.start;
OsmGpsMapPoint end = osm_gps_map_convert_screen_to_geographic(map, event->x, event->y);
GSList *box = pos_append_rad(nullptr, start.rlat, start.rlon);
box = pos_append_rad(box, end.rlat, start.rlon);
box = pos_append_rad(box, end.rlat, end.rlon);
box = pos_append_rad(box, start.rlat, end.rlon);
box = pos_append_rad(box, start.rlat, start.rlon);
osm_gps_map_add_track(map, box);
}
/* returning true here disables dragging in osm-gps-map */
return osm_gps_map_osd_get_state(map) == TRUE ? FALSE : TRUE;
}
static gboolean
on_map_button_press_event(GtkWidget *widget,
GdkEventButton *event, area_context_t *context) {
OsmGpsMap *map = OSM_GPS_MAP(widget);
osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
/* osm-gps-map needs this event to handle the OSD */
if(osd->check(osd, TRUE, event->x, event->y) != OSD_NONE)
return FALSE;
if(osm_gps_map_osd_get_state(map) == TRUE)
return FALSE;
/* remove existing marker */
osm_gps_map_track_remove_all(map);
/* and remember this location as the start */
context->map.start = osm_gps_map_convert_screen_to_geographic(map, event->x, event->y);
return TRUE;
}
/**
* osm_gps_map_clear_tracks:
*
* Deprecated: 0.7.0: Use osm_gps_map_track_remove_all() instead.
**/
void
osm_gps_map_clear_tracks (OsmGpsMap *map)
{
g_warning("%s is deprecated", G_STRFUNC);
osm_gps_map_track_remove_all (map);
}
