Node interactions working again, graph editing functions not complete yet

src/signal-manager.h

@@ -18,12 +18,16 @@ namespace VISEQ::SIGNAL {
 	typedef std::shared_ptr<Signal> SPTR_Signal;
 	typedef std::vector<SPTR_Signal> VEC_SPTR_Signal;
 
-	class SignalManager{
+	class SignalManager : public std::enable_shared_from_this<SignalManager>{
 
 		public:
 			SignalManager() {}
 			SignalManager(GraphManager *gm, std::mutex *mutex) : mutex(mutex), gm(gm) {}
 			
+			std::shared_ptr<SignalManager> getPtr(){
+				return shared_from_this();
+			}
+
 			VISEQ::MIDI::Midi midi;
 			
 			std::mutex *mutex;