Added Tobii from 4.23 + updated

Source/TobiiCore/Public/ITobiiCore.h

@@ -0,0 +1,59 @@
+/******************************************************************************
+* Copyright 2017- Tobii Technology AB. All rights reserved.
+*
+* @author Temaran | Fredrik Lindh | fredrik.lindh@tobii.com | https://github.com/Temaran
+******************************************************************************/
+
+#pragma once
+
+#include "ITobiiEyetracker.h"
+
+#include "CoreMinimal.h"
+#include "IEyeTrackerModule.h"
+#include "Modules/ModuleInterface.h"
+#include "Modules/ModuleManager.h"
+
+DECLARE_DELEGATE(FPostLoadedTobiiEyetrackingDelegate);
+
+/**
+  * The public interface of the TobiiEyeX Module.
+  */
+class ITobiiCore : public IEyeTrackerModule
+{
+public:
+	/**
+	  * Singleton-like access to this module's interface.  This is just for convenience!
+	  * Beware of calling this during the shutdown phase, though. Your module might have been
+	  * unloaded already.
+	  *
+	  * @return Returns singleton instance, loading the module on demand if needed
+	  */
+	static inline ITobiiCore& Get()
+	{
+		return FModuleManager::LoadModuleChecked<ITobiiCore>("TobiiCore");
+	}
+
+	/**
+	  * Checks to see if this module is loaded and ready.  It is only valid to call Get() if 
+	  * IsAvailable() returns true.
+	  *
+	  * @return True if the module is loaded and ready to use
+	  */
+	static inline bool IsAvailable()
+	{
+		return FModuleManager::Get().IsModuleLoaded("TobiiCore") && Get().GetEyeTrackerInternal().IsValid();
+	}
+
+	virtual FString GetModuleKeyName() const override
+	{
+		return FString("TobiiCore");
+	}
+
+	static TSharedPtr<ITobiiEyeTracker, ESPMode::ThreadSafe> GetEyeTracker()
+	{
+		return IsAvailable() ? Get().GetEyeTrackerInternal() : TSharedPtr<ITobiiEyeTracker, ESPMode::ThreadSafe>(nullptr);
+	}
+
+protected:
+	virtual TSharedPtr<ITobiiEyeTracker, ESPMode::ThreadSafe> GetEyeTrackerInternal() = 0;
+};