cross switch detection for map manual control

scenenodegroups.h

@@ -10,6 +10,7 @@ http://mozilla.org/MPL/2.0/.
 #pragma once
 
 #include "scenenode.h"
+#include "widgets/map_objects.h"
 
 namespace scene {
 
@@ -63,6 +64,8 @@ private:
     // creates handle for a new group
     group_handle
         create_handle();
+    bool
+        assign_cross_switch(map::track_switch&sw, TTrack *track, const std::string &id, size_t idx);
 // members
     group_map m_groupmap; // map of established node groups
     std::stack<scene::group_handle> m_activegroup; // helper, group to be assigned to newly created nodes