The attached patch file implements an additional search function.
The user may search for geocoded images within a radius of a
geographical point.
The point may be set by:
Typing in lat long, or cut-and-paste from a web search, into the
lat/long box
Drag-and-drop a geocoded image onto the box
Drag-and-drop a hyperlinked place-name from a geonames.org search
A button to call a geonames.org search is there as a convenience.
I am interested if anyone has any comments, not least of all if such a
function should be included into mainstream Geeqie.
----------
The parsing of typed in lat/long is uncompromising - small error equals
no result
The user interface to geonames.org is not too wonderful - however I find
it quick to use
I am not sure if the algorithm I used will be too slow on big searches
I am not sure if geonames.org is the way to go - I just found it quick
and easy
Colin Clark
diff --git a/src/search.c b/src/search.c
index c4f1146..012c0b0 100644
--- a/src/search.c
+++ b/src/search.c
@@ -190,6 +190,19 @@ struct _SearchData
ThumbLoader *thumb_loader;
gboolean thumb_enable;
FileData *thumb_fd;
+
+ /* Used for lat/lon coordinate search
+ */
+ gint search_gps;
+ gdouble search_lat, search_lon;
+ GtkWidget *label_gps_drop, *entry_gps_coord;
+ GtkWidget *check_gps;
+ GtkWidget *spin_gps;
+ GtkWidget *units_gps;
+ gboolean match_gps_enable;
+
+ /* file list for edit menu */
+ GList *editmenu_fd_list;
};
typedef struct _MatchFileData MatchFileData;
@@ -1385,6 +1398,111 @@ static void search_dnd_begin(GtkWidget *widget, GdkDragContext *context, gpointe
dnd_set_drag_icon(widget, context, sd->click_fd->thumb_pixbuf, search_result_selection_count(sd, NULL));
}
}
+/* Convert lat/lon from a signed double to a string of
+ * the format N 12° 34' 56.78"
+ */
+GString *search_gps_convert_coordinate(gdouble coordinate, const char *key)
+{
+ gint deg, min;
+ gdouble sec;
+ GString *message;
+ gchar *ref;
+
+ if (g_strcmp0(key, "Longitude") == 0)
+ if (coordinate < 0)
+ ref = "W";
+ else
+ ref = "E";
+ else if (g_strcmp0(key, "Latitude") == 0)
+ {
+ if (coordinate < 0)
+ {
+ ref = "S";
+ }
+ else
+ ref = "N";
+ }
+
+ if (coordinate < 0)
+ coordinate = -coordinate;
+ deg = coordinate;
+ min = (coordinate * 60) - (deg * 60);
+ sec = (coordinate * 3600) - ((deg * 3600) + (min * 60));
+
+ message = g_string_new("");
+ g_string_append_printf(message, "%s %i° %i\' %.2lf\"", ref, deg, min, sec);
+
+ return message;
+}
+
+/* Get the coordinates from the result of a drag-and-drop, and copy it into the
+ * user editable box. It will either be a string from a geonames.org search,
+ * or a file list from a drag from the geeqie layout window.
+ */
+GString *search_gps_extract_coordinates(GtkSelectionData *selection_data, gpointer data)
+{
+ gchar **latlon;
+ GString *message = g_string_new("");
+ gchar *str_ptr;
+ gdouble latitude, longitude;
+ GList *list;
+ FileData *fd;
+ SearchData *sd = data;
+ gchar **array = NULL;
+
+ array = gtk_selection_data_get_uris(selection_data);
+ if (array != NULL)
+ {
+ str_ptr = g_strstr_len(array[0], -1, "http://www.geonames.org/maps/google_";);
+ if (str_ptr != NULL)
+ {
+ latlon = g_strsplit(g_strndup(str_ptr + 36, g_strrstr(str_ptr + 36, ".html") - str_ptr + 36), "_", 0);
+ latitude = g_ascii_strtod(latlon[0], NULL);
+ g_string_append(message, search_gps_convert_coordinate(latitude, "Latitude")->str);
+ g_string_append(message, " ");
+
+ longitude = g_ascii_strtod(latlon[1], NULL);
+ g_string_append(message, search_gps_convert_coordinate(longitude, "Longitude")->str);
+
+ gtk_button_set_label(GTK_BUTTON(sd->label_gps_drop), "geonames.org");
+
+ g_strfreev(latlon);
+ }
+ else
+ {
+ list = uri_filelist_from_gtk_selection_data(selection_data);
+
+ /* If more than one file, use only the first file in a list.
+ */
+ if (list != NULL)
+ {
+ fd = list->data;
+ latitude = metadata_read_GPS_coord(fd, "Xmp.exif.GPSLatitude", 1000);
+ longitude = metadata_read_GPS_coord(fd, "Xmp.exif.GPSLongitude", 1000);
+ if (latitude != 1000 && longitude != 1000)
+ {
+ g_string_append(message, search_gps_convert_coordinate(latitude, "Latitude")->str);
+ g_string_append(message, " ");
+ g_string_append(message, search_gps_convert_coordinate(longitude, "Longitude")->str);
+ }
+ }
+ }
+ g_strfreev (array);
+ }
+
+ return message;
+
+}
+
+static void search_gps_dnd_received_cb(GtkWidget *pane, GdkDragContext *context,
+ gint x, gint y,
+ GtkSelectionData *selection_data, guint info,
+ guint time, gpointer data)
+{
+ SearchData *sd = data;
+
+ gtk_entry_set_text(GTK_ENTRY(sd->entry_gps_coord), search_gps_extract_coordinates(selection_data, sd)->str);
+}
static void search_dnd_init(SearchData *sd)
{
@@ -1395,6 +1513,18 @@ static void search_dnd_init(SearchData *sd)
G_CALLBACK(search_dnd_data_set), sd);
g_signal_connect(G_OBJECT(sd->result_view), "drag_begin",
G_CALLBACK(search_dnd_begin), sd);
+#if 0
+ g_signal_connect(G_OBJECT(sd->result_view), "drag_end",
+ G_CALLBACK(search_dnd_end), sd);
+#endif
+
+ gtk_drag_dest_set(GTK_WIDGET(sd->entry_gps_coord),
+ GTK_DEST_DEFAULT_MOTION | GTK_DEST_DEFAULT_HIGHLIGHT | GTK_DEST_DEFAULT_DROP,
+ result_drag_types, n_result_drag_types,
+ GDK_ACTION_COPY);
+
+ g_signal_connect(G_OBJECT(sd->entry_gps_coord), "drag_data_received",
+ G_CALLBACK(search_gps_dnd_received_cb), sd);
}
/*
@@ -1862,6 +1992,40 @@ static gboolean search_file_next(SearchData *sd)
match = (sd->match_comment == SEARCH_MATCH_NONE);
}
}
+ /* Calculate the distance the image is from the specified origin.
+ * This is a standard algorithm. A simplified one may be faster.
+ */
+ #define RADIANS 0.0174532925
+ #define KM_EARTH_RADIUS 6371
+ #define MILES_EARTH_RADIUS 3959
+
+ gdouble latitude, longitude, range, conversion;
+
+ if (g_strcmp0(gtk_combo_box_text_get_active_text(GTK_COMBO_BOX(sd->units_gps)), _("miles")) != 0)
+ {
+ conversion = KM_EARTH_RADIUS;
+ }
+ else
+ {
+ conversion = MILES_EARTH_RADIUS;
+ }
+
+ if (match && sd->match_gps_enable && sd->search_lat && sd->search_lon)
+ {
+ tested = TRUE;
+ match = FALSE;
+
+ latitude = metadata_read_GPS_coord(fd, "Xmp.exif.GPSLatitude", 1000);
+ longitude = metadata_read_GPS_coord(fd, "Xmp.exif.GPSLongitude", 1000);
+ if (latitude != 1000 && longitude != 1000)
+ {
+ range = conversion * acos ( sin(latitude * RADIANS) * sin(sd->search_lat * RADIANS) +
+ cos(latitude * RADIANS) * cos(sd->search_lat * RADIANS) * cos((sd->search_lon - longitude) * RADIANS));
+
+ if (sd->search_gps >= range)
+ match = TRUE;
+ }
+ }
if ((match || extra_only) &&
(sd->match_dimensions_enable || sd->match_similarity_enable))
@@ -2095,6 +2259,10 @@ static void search_start_cb(GtkWidget *widget, gpointer data)
SearchData *sd = data;
GtkTreeViewColumn *column;
gchar *path;
+ gdouble deg_lat, min_lat, sec_lat, deg_lon, min_lon, sec_lon, latitude, longitude;
+ gchar north_south[35];
+ gchar east_west[35];
+ gchar *entry_text;
if (sd->search_folder_list)
{
@@ -2124,6 +2292,54 @@ static void search_start_cb(GtkWidget *widget, gpointer data)
}
tab_completion_append_to_history(sd->entry_similarity, sd->search_similarity_path);
}
+ /* Check the coordinate entry.
+ * If the result is not sensible, it should get blocked.
+ */
+ if (sd->match_gps_enable)
+ {
+ entry_text = g_strdup(gtk_entry_get_text(GTK_ENTRY(sd->entry_gps_coord)));
+ g_strstrip(entry_text);
+ if (entry_text != NULL && strlen(entry_text) <= 37)
+ {
+ g_strcanon(entry_text, "NSEW0123456789.", ' ');
+ sscanf(entry_text,"%s %lf %lf %lf %s %lf %lf %lf",
+ north_south, °_lat, &min_lat, &sec_lat,
+ east_west, °_lon, &min_lon, &sec_lon);
+
+ latitude = deg_lat + min_lat / 60 + sec_lat / 3600;
+ longitude = deg_lon + min_lon / 60 + sec_lon / 3600;
+
+ if ((g_strcmp0(north_south, "N") == 0 || g_strcmp0(north_south, "S") == 0) &&
+ (g_strcmp0(east_west, "E") == 0 || g_strcmp0(east_west, "W") == 0) &&
+ (latitude <= 90.0) && (latitude >= -90.0) &&
+ (longitude <= 180.0) && (longitude >= -180.0))
+ {
+ if (g_strcmp0(north_south, "S") == 0)
+ latitude = -latitude;
+ if (g_strcmp0(east_west, "W") == 0)
+ longitude = -longitude;
+ sd->search_lat = latitude;
+ sd->search_lon = longitude;
+ }
+ else
+ {
+ file_util_warning_dialog(_("Entry does not contain a valid lat/lon value"),
+ _("Please enter a coordinate in the form:N \n12° 34' 56.78\" W 12° 34' 56.78\" \n or\n 12 34 56.78 W 12 34 56.78 \n or drag-and-drop"),
+ GTK_STOCK_DIALOG_WARNING, sd->window);
+ return;
+ }
+ }
+ else
+ {
+ file_util_warning_dialog(_("Entry does not contain a valid lat/lon value"),
+ _("Please enter a coordinate in the form:N \n12° 34' 56.78\" W 12° 34' 56.78\" \n or\nN 12 34 56.78 W 12 34 56.78 \\n or drag-and-drop"),
+ GTK_STOCK_DIALOG_WARNING, sd->window);
+ return;
+ }
+ g_free(entry_text);
+ }
+
+
string_list_free(sd->search_keyword_list);
sd->search_keyword_list = keyword_list_pull(sd->entry_keywords);
@@ -2579,6 +2795,7 @@ void search_new(FileData *dir_fd, FileData *example_file)
sd->match_name_enable = TRUE;
sd->search_similarity = 95;
+ sd->search_gps = 1;
if (example_file)
{
@@ -2737,6 +2954,42 @@ void search_new(FileData *dir_fd, FileData *example_file)
gtk_widget_show(sd->entry_comment);
pref_checkbox_new_int(hbox, _("Match case"),
sd->search_comment_match_case, &sd->search_comment_match_case);
+ /* Search for images within a specified range of a lat/lon coordinate
+ */
+ hbox = menu_choice(sd->box_search, &sd->check_gps, NULL,
+ _("Image is within"), &sd->match_gps_enable,
+ NULL, 0, NULL, sd);
+ sd->spin_gps = menu_spin(hbox, 1, 9999, sd->search_gps,
+ G_CALLBACK(menu_choice_spin_cb), &sd->search_gps);
+ gtk_drag_dest_unset(sd->spin_gps);
+
+ sd->units_gps = gtk_combo_box_text_new();
+ gtk_combo_box_text_append_text(GTK_COMBO_BOX(sd->units_gps), _("km"));
+ gtk_combo_box_text_append_text(GTK_COMBO_BOX(sd->units_gps), _("miles"));
+ gtk_box_pack_start(GTK_BOX(hbox), sd->units_gps, FALSE, FALSE, 0);
+ gtk_combo_box_set_active(GTK_COMBO_BOX(sd->units_gps), 0);
+ gtk_widget_show(sd->units_gps);
+
+ pref_label_new(hbox, _("of"));
+
+ sd->entry_gps_coord = gtk_entry_new();
+ gtk_editable_set_editable(GTK_EDITABLE(sd->entry_gps_coord), TRUE);
+ gtk_widget_set_has_tooltip(sd->entry_gps_coord, TRUE);
+ gtk_widget_set_tooltip_text(sd->entry_gps_coord, _("Enter a coordinate in the form:\nN 12° 34' 56.78\" W 12° 34' 56.78\" \n or\nN 12 34 56.78 W 12 34 56.78 \n or drag-and-drop"));
+ gtk_box_pack_start(GTK_BOX(hbox), sd->entry_gps_coord, TRUE, TRUE, 0);
+ gtk_widget_set_sensitive(sd->entry_gps_coord, TRUE);
+ gtk_drag_dest_unset(sd->entry_gps_coord);
+
+ sd->label_gps_drop = gtk_link_button_new_with_label("http://www.geonames.org";, _("geonames.org"));
+ gtk_widget_set_has_tooltip(sd->label_gps_drop, TRUE);
+ gtk_widget_set_tooltip_text(sd->label_gps_drop, _("Drag a placename from a www.geonames.org search, \n or drag a geocoded thumbnail onto the adjoining box.\n\n Click to start a www.geonames.org search."));
+ gtk_box_pack_start(GTK_BOX(hbox), sd->label_gps_drop, TRUE, TRUE, 0);
+ gtk_widget_set_sensitive(sd->label_gps_drop, FALSE);
+
+ g_signal_connect(G_OBJECT(sd->check_gps), "toggled",
+ G_CALLBACK(menu_choice_check_cb), sd->label_gps_drop);
+ gtk_widget_show(sd->label_gps_drop);
+ gtk_widget_show(sd->entry_gps_coord);
/* Done the types of searches */
------------------------------------------------------------------------------
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