static GList *routing_engine_list = NULL;
static VikLayerParam prefs[] = {
- { VIK_LAYER_NUM_TYPES, VIKING_ROUTING_PARAMS_NAMESPACE "default", VIK_LAYER_PARAM_STRING, VIK_LAYER_GROUP_NONE, N_("Default engine:"), VIK_LAYER_WIDGET_COMBOBOX, NULL, NULL, NULL },
+ { VIK_LAYER_NUM_TYPES, VIKING_ROUTING_PARAMS_NAMESPACE "default", VIK_LAYER_PARAM_STRING, VIK_LAYER_GROUP_NONE, N_("Default engine:"), VIK_LAYER_WIDGET_COMBOBOX, NULL, NULL, NULL, NULL, NULL, NULL },
};
gchar **routing_engine_labels = NULL;
void
vik_routing_prefs_init()
{
- a_preferences_register_group ( VIKING_ROUTING_PARAMS_GROUP_KEY, "Routing" );
+ a_preferences_register_group ( VIKING_ROUTING_PARAMS_GROUP_KEY, _("Routing") );
VikLayerParamData tmp;
tmp.s = NULL;
a_preferences_register(prefs, tmp, VIKING_ROUTING_PARAMS_GROUP_KEY);
}
+/* @see g_list_find_custom */
static gint
search_by_id (gconstpointer a,
gconstpointer b)
*
* Returns: the default engine
*/
-static VikRoutingEngine *
+VikRoutingEngine *
vik_routing_default_engine ( void )
{
const gchar *id = a_preferences_get ( VIKING_ROUTING_PARAMS_NAMESPACE "default")->s;
* vik_routing_default_find:
*
* Route computation with default engine.
+ *
+ * Return indicates success or not
*/
-void
+gboolean
vik_routing_default_find(VikTrwLayer *vt, struct LatLon start, struct LatLon end)
{
/* The engine */
VikRoutingEngine *engine = vik_routing_default_engine ( );
/* The route computation */
- vik_routing_engine_find ( engine, vt, start, end );
+ return vik_routing_engine_find ( engine, vt, start, end );
}
/**
{
g_list_foreach ( routing_engine_list, func, user_data );
}
+
+/*
+ * This function is called for all routing engine registered.
+ * Following result of the predicate function, the current engine
+ * is added to the combobox. In order to retrieve the VikRoutingEngine
+ * object, we store a list of added engine in a GObject's data "engines".
+ *
+ * @see g_list_foreach()
+ */
+static void
+fill_engine_box (gpointer data, gpointer user_data)
+{
+ VikRoutingEngine *engine = (VikRoutingEngine*) data;
+ /* Retrieve combo */
+ GtkWidget *widget = (GtkWidget*) user_data;
+
+ /* Only register engine fulfilling expected behaviour */
+ Predicate predicate = g_object_get_data ( G_OBJECT ( widget ), "func" );
+ gpointer predicate_data = g_object_get_data ( G_OBJECT ( widget ), "user_data" );
+ /* No predicate means to register all engines */
+ gboolean ok = predicate == NULL || predicate (engine, predicate_data);
+
+ if (ok)
+ {
+ /* Add item in widget */
+ const gchar *label = vik_routing_engine_get_label (engine);
+ vik_combo_box_text_append (widget, label);
+ /* Save engine in internal list */
+ GList *engines = (GList*) g_object_get_data ( G_OBJECT ( widget ) , "engines" );
+ engines = g_list_append ( engines, engine );
+ g_object_set_data ( G_OBJECT ( widget ), "engines", engines );
+ }
+}
+
+/**
+ * vik_routing_ui_selector_new:
+ * @func: user function to decide if an engine has to be added or not
+ * @user_data: user data for previous function
+ *
+ * Creates a combo box to allow selection of a routing engine.
+ *
+ * We use GObject data hashtable to store and retrieve the VikRoutingEngine
+ * associated to the selection.
+ *
+ * Returns: the combo box
+ */
+GtkWidget *
+vik_routing_ui_selector_new (Predicate func, gpointer user_data)
+{
+ /* Create the combo */
+ GtkWidget * combo = vik_combo_box_text_new ();
+
+ /* Save data for foreach function */
+ g_object_set_data ( G_OBJECT ( combo ), "func", func );
+ g_object_set_data ( G_OBJECT ( combo ), "user_data", user_data );
+
+ /* Filter all engines with given user function */
+ vik_routing_foreach_engine (fill_engine_box, combo);
+
+ return combo;
+}
+
+/**
+ * vik_routing_ui_selector_get_nth:
+ * @combo: the GtkWidget combobox
+ * @pos: the selected position
+ *
+ * Retrieve the VikRoutingEngine stored in a list attached to @combo
+ * via the "engines" property.
+ *
+ * Returns: the VikRoutingEngine object associated to @pos
+ */
+VikRoutingEngine *
+vik_routing_ui_selector_get_nth (GtkWidget *combo, int pos)
+{
+ /* Retrieve engine */
+ GList *engines = (GList*) g_object_get_data ( G_OBJECT ( combo ) , "engines" );
+ VikRoutingEngine *engine = g_list_nth_data ( engines, pos );
+
+ return engine;
+}
+
+// For simplicity a variable with visibility to multiple functions
+static guint engine_count = 0;
+
+static void
+count_engine_directions (gpointer data, gpointer user_data)
+{
+ VikRoutingEngine *engine = (VikRoutingEngine*) data;
+ if ( vik_routing_engine_supports_direction ( engine ) )
+ engine_count++;
+}
+
+/**
+ * vik_routing_number_of_engines:
+ *
+ * Returns: the number of engines available
+ */
+guint vik_routing_number_of_engines ( VikRoutingMethodType method )
+{
+ engine_count = 0;
+ if ( routing_engine_list ) {
+ if ( method == VIK_ROUTING_METHOD_DIRECTIONS )
+ vik_routing_foreach_engine ( count_engine_directions, NULL );
+ else
+ // ATM Every engine supports Lat/Lon requests
+ engine_count = g_list_length ( routing_engine_list );
+ }
+ return engine_count;
+}