Is there a Blueprint node that checks if game window is unfocused?

[SolidSk]

You can inherit a Blueprint Character from your Character C++ class:

.h file:

UCLASS()
class EXAMPLE_API AMyCharacter : public ACharacter
{
	GENERATED_BODY()

protected:
	virtual void BeginPlay() override;

public:
	UFUNCTION(BlueprintImplementableEvent)
	void OnWindowsLostFocus();

	UFUNCTION(BlueprintImplementableEvent)
	void OnWindowsGainFocus();
	

private:
	void OnWindowFocusChanged(bool bIsFocused);
};

.cpp file:

void AMyCharacter::BeginPlay()
{
	Super::BeginPlay();

	FSlateApplication::Get().OnApplicationActivationStateChanged().AddUObject(this, &AMyCharacter::OnWindowFocusChanged);
}

void AMyCharacter::OnWindowFocusChanged(const bool bIsFocused)
{
	if (bIsFocused)
	{
		OnWindowsGainFocus();
	}
	else
	{
		OnWindowsLostFocus();	
	}
}

And use: