Work on a dive localisation tool using GPS coordinates

For each dive recorded, place their GPS coordinates onto a map using the
OSM-GPS-MAP library.

This map is accessible via the "log" menu or the shortcut ctrl+M (M as map).

We check for the GPS coordinates "0, 0" which are the default when we do not
have real GPS coordinates set.

[Dirk Hohndel: fixed int/float math confusion, fixed some whitespace and
               coding style issues, cleaned up some comments, added a
	       missing cast to prevent a compiler warning]

Signed-off-by: Pierre-Yves Chibon <pingou@pingoured.fr>
Signed-Off-By: Henrik Brautaset Aronsen <subsurface@henrik.synth.no>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 91 insertions, 0 deletions

diff --git a/gps.c b/gps.c
new file mode 100644
index 000000000..86eb60672
--- /dev/null
+++ b/gps.c
@@ -0,0 +1,91 @@
+/* gps.c */
+/* Creates the UI displaying the dives locations on a map.
+ */
+#include <glib/gi18n.h>
+
+#include "osm-gps-map.h"
+
+#include "dive.h"
+#include "display.h"
+#include "display-gtk.h"
+#include "divelist.h"
+
+static OsmGpsMapSource_t opt_map_provider = OSM_GPS_MAP_SOURCE_OPENSTREETMAP;
+
+
+static void on_close (GtkWidget *widget, gpointer user_data)
+{
+	gtk_widget_destroy(widget);
+}
+
+static void add_gps_point(OsmGpsMap *map, float latitude, float longitude)
+{
+	OsmGpsMapTrack * track = osm_gps_map_track_new ();
+	OsmGpsMapPoint * point = osm_gps_map_point_new_degrees (latitude, longitude);
+	osm_gps_map_track_add_point(track, point);
+	osm_gps_map_track_add (map, track);
+}
+
+
+void show_gps_locations()
+{
+	GtkWidget *window;
+
+	OsmGpsMap *map;
+	OsmGpsMapLayer *osd;
+	char *cachedir, *cachebasedir;
+	int idx;
+	struct dive *dp;
+
+	cachebasedir = osm_gps_map_get_default_cache_directory();
+	cachedir = g_strdup(OSM_GPS_MAP_CACHE_AUTO);
+
+	map = g_object_new (OSM_TYPE_GPS_MAP,
+				"map-source",opt_map_provider,
+				"tile-cache",cachedir,
+				"tile-cache-base", cachebasedir,
+				"proxy-uri",g_getenv("http_proxy"),
+				NULL);
+	osd = g_object_new (OSM_TYPE_GPS_MAP_OSD,
+				"show-scale",TRUE,
+				"show-coordinates",TRUE,
+				"show-crosshair",TRUE,
+				"show-dpad",TRUE,
+				"show-zoom",TRUE,
+				"show-gps-in-dpad",TRUE,
+				"show-gps-in-zoom",FALSE,
+				"dpad-radius", 30,
+				NULL);
+
+	osm_gps_map_layer_add(OSM_GPS_MAP(map), osd);
+	g_object_unref(G_OBJECT(osd));
+	for (idx = 0; idx < dive_table.nr; idx++) {
+		dp = dive_table.dives[idx];
+		if (dp->latitude.udeg != 0 && dp->longitude.udeg != 0){
+			add_gps_point(map, dp->latitude.udeg / 1000000.0,
+				dp->longitude.udeg / 1000000.0);
+		}
+	}
+	osm_gps_map_set_center_and_zoom(map, 0, 0, 0);
+
+	/* Enable keyboard navigation */
+	osm_gps_map_set_keyboard_shortcut(map, OSM_GPS_MAP_KEY_FULLSCREEN, GDK_KEY_F11);
+	osm_gps_map_set_keyboard_shortcut(map, OSM_GPS_MAP_KEY_UP, GDK_KEY_Up);
+	osm_gps_map_set_keyboard_shortcut(map, OSM_GPS_MAP_KEY_DOWN, GDK_KEY_Down);
+	osm_gps_map_set_keyboard_shortcut(map, OSM_GPS_MAP_KEY_LEFT, GDK_KEY_Left);
+	osm_gps_map_set_keyboard_shortcut(map, OSM_GPS_MAP_KEY_RIGHT, GDK_KEY_Right);
+
+	window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+
+	gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
+	gtk_window_set_default_size(GTK_WINDOW(window), 640, 480);
+	gtk_window_set_title(GTK_WINDOW(window), _("Dives locations"));
+	gtk_container_set_border_width(GTK_CONTAINER(window), 5);
+	GTK_WINDOW(window)->allow_shrink = TRUE;
+
+	gtk_container_add (GTK_CONTAINER (window), GTK_WIDGET(map));
+
+	g_signal_connect (window, "destroy", G_CALLBACK (on_close), (gpointer) map);
+
+	gtk_widget_show_all (window);
+}