Change StateManager interface

UnityProject/Assets/Scenes/Examples/MIDI/MIDI.unity

@@ -212,6 +212,54 @@ Transform:
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+--- !u!1 &337815214
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+  m_Component:
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+  - component: {fileID: 337815215}
+  m_Layer: 0
+  m_Name: StateManager
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+--- !u!114 &337815215
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+  m_Name: 
+  m_EditorClassIdentifier: 
+  csvFileName: qlist
+  onStateChanged:
+    m_PersistentCalls:
+      m_Calls: []
+  sceneSelection: 0
+--- !u!4 &337815216
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@@ -1044,7 +1092,6 @@ GameObject:
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@@ -1073,19 +1120,6 @@ Animator:
   m_HasTransformHierarchy: 1
   m_AllowConstantClipSamplingOptimization: 1
   m_KeepAnimatorControllerStateOnDisable: 0
---- !u!65 &1843145348
-BoxCollider:
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 --- !u!23 &1843145349
 MeshRenderer:
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UnityProject/Assets/Scenes/Examples/MIDI/script/OrangeCube.cs

@@ -11,5 +11,7 @@ namespace cylvester
         {
             anim.SetTrigger(AnimTrigger);
         }
+        
+        
     }
 }

UnityProject/Assets/Scripts/PdConnection/PdBackend.cs

@@ -86,7 +86,6 @@ namespace cylvester
             samplePlaybackObserver_.ValueChanged -= onSamplePlaybackChanged_;
             midiParser_.MidiMessageReceived -= onMidiMessageReceived_;
             midiParser_.MidiSyncReceived -= onMidiSyncReceived_;
-
         }
 
         public void Update()
@@ -100,9 +99,9 @@ namespace cylvester
 
         public void SendState(IStateManager stateManager)
         {
-            pdSender_.Send("state previous " + stateManager.PreviousState);
+            pdSender_.Send("state previous " + (stateManager.PreviousState.HasValue ? stateManager.PreviousState.Value.Title : "---"));
-            pdSender_.Send("state current " + stateManager.CurrentState);
+            pdSender_.Send("state current " + stateManager.CurrentState.Title);
-            pdSender_.Send("state next " + stateManager.NextState);
+            pdSender_.Send("state next " + (stateManager.NextState.HasValue ? stateManager.NextState.Value.Title : "---"));
         }
 
     }

UnityProject/Assets/Scripts/StateManagement/StateManager.cs

@@ -13,9 +13,9 @@ namespace cylvester
         int SelectedState { set; }
         
         State[] States { get; }
-        string CurrentState { get; }
+        State CurrentState { get; }
-        string PreviousState { get; }
+        State? PreviousState { get; }
-        string NextState { get; }
+        State? NextState { get; }
 
         void OnMidiReceived(MidiMessage message);
     }
@@ -70,11 +70,11 @@ namespace cylvester
         
         public State[] States { get; private set; }
 
-        public string CurrentState => States[sceneSelection].Title;
+        public State CurrentState => States[sceneSelection];
 
-        public string PreviousState => sceneSelection == 0 ? "---" : States[sceneSelection-1].Title;
+        public State? PreviousState => sceneSelection == 0 ? (State?) null : States[sceneSelection-1];
 
-        public string NextState => sceneSelection == States.Length - 1 ? "---" : States[sceneSelection + 1].Title;
+        public State? NextState => sceneSelection == States.Length - 1 ? (State?) null : States[sceneSelection + 1];
 
         public int SelectedState
         {