Spawn Event System from Flowchart instead of Menu command

Event System is now required by dialog click input

Assets/Fungus/Flowchart/Scripts/Flowchart.cs

@@ -1,4 +1,5 @@
 using UnityEngine;
+using UnityEngine.EventSystems;
 using UnityEngine.Serialization;
 using System;
 using System.Linq;
@@ -128,6 +129,8 @@ namespace Fungus
 		 */
 		public static List<Flowchart> cachedFlowcharts = new List<Flowchart>();
 
+		protected static bool eventSystemPresent;
+
 		/**
 		 * Returns the next id to assign to a new flowchart item.
 		 * Item ids increase monotically so they are guaranteed to
@@ -150,6 +153,41 @@ namespace Fungus
 			return maxId + 1;
 		}
 
+		protected virtual void OnLevelWasLoaded(int level) 
+		{
+			// Reset the flag for checking for an event system as there may not be one in the newly loaded scene.
+			eventSystemPresent = false;
+		}
+
+		protected virtual void Start()
+		{
+			CheckEventSystem();
+		}
+		
+		// There must be an Event System in the scene for Say and Menu input to work.
+		// This method will automatically instantiate one if none exists.
+		protected virtual void CheckEventSystem()
+		{
+			if (eventSystemPresent)
+			{
+				return;
+			}
+			
+			EventSystem eventSystem = GameObject.FindObjectOfType<EventSystem>();
+			if (eventSystem == null)
+			{
+				// Auto spawn an Event System from the prefab
+				GameObject prefab = Resources.Load<GameObject>("EventSystem");
+				if (prefab != null)
+				{
+					GameObject go = Instantiate(prefab) as GameObject;
+					go.name = "EventSystem";
+				}
+			}
+			
+			eventSystemPresent = true;
+		}
+
 		public virtual void OnEnable()
 		{
 			if (!cachedFlowcharts.Contains(this))

Assets/Fungus/Narrative/Scripts/Commands/Menu.cs

@@ -1,6 +1,5 @@
 using UnityEngine;
 using UnityEngine.Serialization;
-using UnityEngine.EventSystems;
 using System;
 using System.Collections;
 using System.Collections.Generic;
@@ -32,12 +31,8 @@ namespace Fungus
 		[Tooltip("A custom Menu Dialog to use to display this menu. All subsequent Menu commands will use this dialog.")]
 		public MenuDialog setMenuDialog;
 
-		protected static bool eventSystemPresent;
-
 		public override void OnEnter()
 		{
-			CheckEventSystem();
-
 			if (setMenuDialog != null)
 			{
 				// Override the active menu dialog
@@ -60,37 +55,6 @@ namespace Fungus
 			Continue();
 		}
 
-		void OnLevelWasLoaded(int level) 
-		{
-			// Reset the flag for checking for an event system as there may not be one
-			// in the newly loaded scene.
-			eventSystemPresent = false;
-		}
-
-		// There must be an Event System in the scene for Menu input to work.
-		// This function will automatically instantiate one if none exists.
-		protected virtual void CheckEventSystem()
-		{
-			if (eventSystemPresent)
-			{
-				return;
-			}
-
-			EventSystem eventSystem = GameObject.FindObjectOfType<EventSystem>();
-			if (eventSystem == null)
-			{
-				// Auto spawn an Event System from the prefab
-				GameObject prefab = Resources.Load<GameObject>("EventSystem");
-				if (prefab != null)
-				{
-					GameObject go = Instantiate(prefab) as GameObject;
-					go.name = "EventSystem";
-				}
-			}
-
-			eventSystemPresent = true;
-		}
-
 		public override void GetConnectedBlocks(ref List<Block> connectedBlocks)
 		{
 			if (targetBlock != null)