Determine site based on lat-lon location

[aweather] / src / plugins / radar.c

diff --git a/src/plugins/radar.c b/src/plugins/radar.c
index 334e0fb6b8f4598ccbaede664d220770e9bd45f2..13922f8fd6309b241da1714b99801110f03565f3 100644 (file)
--- a/src/plugins/radar.c
+++ b/src/plugins/radar.c
@@ -27,6 +27,7 @@
 
 #include "radar.h"
 #include "marching.h"
+#include "../aweather-location.h"
 
 
 /**************************
@@ -396,23 +397,13 @@ static void _cache_done_cb(char *path, gboolean updated, gpointer _self)
        self->soup = NULL;
 }
 
-
-/*************
- * Callbacks *
- *************/
-static void _on_sweep_clicked(GtkRadioButton *button, gpointer _self)
+static void _set_radar(GisPluginRadar *self, const char *site, const char *time)
 {
-       GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
-       _load_colormap(self, g_object_get_data(G_OBJECT(button), "type" ));
-       _load_sweep   (self, g_object_get_data(G_OBJECT(button), "sweep"));
-}
+       if (!site || !time)
+               return;
+       g_debug("GisPluginRadar: set_radar - %s - %s", site, time);
 
-static void _on_time_changed(GisViewer *viewer, const char *time, gpointer _self)
-{
-       GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
-       g_debug("GisPluginRadar: on_time_changed - setting time=%s", time);
        // format: http://mesonet.agron.iastate.edu/data/nexrd2/raw/KABR/KABR_20090510_0323
-       char *site = gis_viewer_get_site(viewer);
        char *path = g_strdup_printf("nexrd2/raw/%s/%s_%s", site, site, time);
 
        /* Set up progress bar */
@@ -450,6 +441,57 @@ static void _on_time_changed(GisViewer *viewer, const char *time, gpointer _self
        g_free(path);
 }
 
+
+/*************
+ * Callbacks *
+ *************/
+static void _on_sweep_clicked(GtkRadioButton *button, gpointer _self)
+{
+       GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
+       _load_colormap(self, g_object_get_data(G_OBJECT(button), "type" ));
+       _load_sweep   (self, g_object_get_data(G_OBJECT(button), "sweep"));
+}
+
+static void _on_time_changed(GisViewer *viewer, const char *time, gpointer _self)
+{
+       g_debug("GisPluginRadar: _on_time_changed");
+       GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
+       g_free(self->cur_time);
+       self->cur_time = g_strdup(time);
+       _set_radar(self, self->cur_site, self->cur_time);
+}
+
+static void _on_location_changed(GisViewer *viewer,
+               gdouble lat, gdouble lon, gdouble elev,
+               gpointer _self)
+{
+       g_debug("GisPluginRadar: _on_location_changed");
+       GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
+       gdouble min_dist = EARTH_R / 5;
+       city_t *city, *min_city = NULL;
+       for (city = cities; city->type; city++) {
+               if (city->type != LOCATION_CITY)
+                       continue;
+               gdouble city_loc[3] = {};
+               gdouble eye_loc[3]  = {lat, lon, elev};
+               lle2xyz(city->lat, city->lon, city->elev,
+                               &city_loc[0], &city_loc[1], &city_loc[2]);
+               lle2xyz(lat, lon, elev,
+                               &eye_loc[0], &eye_loc[1], &eye_loc[2]);
+               gdouble dist = distd(city_loc, eye_loc);
+               if (dist < min_dist) {
+                       min_dist = dist;
+                       min_city = city;
+               }
+       }
+       static city_t *last_city = NULL;
+       if (min_city && min_city != last_city) {
+               self->cur_site = min_city->code;
+               _set_radar(self, self->cur_site, self->cur_time);
+       }
+       last_city = min_city;
+}
+
 static gpointer _draw_radar(GisCallback *callback, gpointer _self)
 {
        GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
@@ -590,6 +632,9 @@ GisPluginRadar *gis_plugin_radar_new(GisViewer *viewer, GisPrefs *prefs)
        self->prefs  = prefs;
        self->time_changed_id = g_signal_connect(viewer, "time-changed",
                        G_CALLBACK(_on_time_changed), self);
+       self->location_changed_id = g_signal_connect(viewer, "location-changed",
+                       G_CALLBACK(_on_location_changed), self);
+
        /* Add renderers */
        GisCallback *callback;