actually quit the game if "End Study" is clicked, once faded out

Source/StudyFrameworkPlugin/Private/HUD/SFFadeHandler.cpp

@@ -56,6 +56,11 @@ void USFFadeHandler::Tick()
 			SetTimerForNextTick();
 			FadeState = EFadeState::WaitForLevelLoaded;
 		}
+		else if(USFGameInstance::Get()->HasEnded())
+		{
+			//we quit the game
+			UKismetSystemLibrary::QuitGame(USFGameInstance::Get()->GetWorld(), nullptr, EQuitPreference::Quit, false);
+		}
 		//else just do nothing so we stay faded out NewLevelName=="" is the case for a simple FadeOut()
 		break;
 

Source/StudyFrameworkPlugin/Private/SFGameInstance.cpp

@@ -45,6 +45,9 @@ void USFGameInstance::Init()
 	// Register delegate for ticker callback
 	TickDelegateHandle = FTicker::GetCoreTicker().AddTicker(FTickerDelegate::CreateUObject(this, &USFGameInstance::LogTick));
 	LogObject->Initialize();
+
+	bStudyStarted = false;
+	bStudyEnded = false;
 }
 
 void USFGameInstance::Shutdown()
@@ -358,6 +361,7 @@ void USFGameInstance::EndStudy()
 		GetHUD()->SetNextConditionButtonVisibility(ESlateVisibility::Collapsed);
 	}
 
+	bStudyEnded = true;
 	FadeHandler->FadeOut();
 }
 
@@ -460,6 +464,11 @@ bool USFGameInstance::IsStarted() const
 	return bStudyStarted;
 }
 
+bool USFGameInstance::HasEnded() const
+{
+	return bStudyEnded;
+}
+
 float USFGameInstance::GetCurrentTime() const
 {
 	if(GetParticipant() && IsStarted())

Source/StudyFrameworkPlugin/Public/SFGameInstance.h

@@ -62,6 +62,12 @@ public:
 	UFUNCTION(BlueprintCallable)
 	bool IsStarted() const;
 
+	//Whether the study is done (this is actually only true for a short duration), as once faded out Unreal is quit
+	UFUNCTION(BlueprintCallable)
+	bool HasEnded() const;
+
+	
+
 	//the time that passed since the start of the study in seconds
 	UFUNCTION(BlueprintCallable)
 	float GetCurrentTime() const;
@@ -190,9 +196,12 @@ protected:
 	USFCondition* StartCondition;
 
 	// State of Study / GameInstance
-	UPROPERTY()
+	UPROPERTY(BlueprintReadOnly)
 	bool bStudyStarted = false;
 
+	UPROPERTY(BlueprintReadOnly)
+	bool bStudyEnded = false;
+
 	//singleton object of this class, to easier access it
 	static USFGameInstance* Instance;