NavLinkObjectUE4

NavLinkObject.h:

    class UNavLinkDefinition;

    UCLASS()
    class SHOOTERGAME_API ANavLinkObject : public AActor, public INavLinkHostInterface, public INavRelevantInterface
    {
    	GENERATED_UCLASS_BODY()

    public:

    	/** check if nav link is enabled */
    	UFUNCTION(BlueprintCallable, Category = "AI|Navigation")
    	bool IsNavLinkEnabled() const;

    	/** change state of nav link */
    	UFUNCTION(BlueprintCallable, Category = "AI|Navigation")
    	void SetNavLinkEnabled(bool bEnabled);

    	// BEGIN INavRelevantInterface
    	virtual FBox GetNavigationBounds() const;
    	// END INavRelevantInterface

    	// BEGIN INavLinkHostInterface
    	virtual bool GetNavigationLinksClasses(TArray<TSubclassOf<UNavLinkDefinition> >& OutClasses) const override;
    	// END INavLinkHostInterface

    	/** Nav link: toggle relevancy */
    	UPROPERTY(EditAnywhere, Category = NavLink)
    	bool bNavLinkIsRelevant;

    #if WITH_EDITOR
    	virtual void PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent) override;
    #endif // WITH_EDITOR

    private:
    	UPROPERTY(VisibleAnywhere, Category = NavLink)
    	class UNavLinkCustomComponent* NavLinkComp;

    };


NavLinkObject.cpp

    // Sets default values
    ANavLinkObject::ANavLinkObject(const FObjectInitializer& ObjectInitializer) : Super(ObjectInitializer)
    , bNavLinkIsRelevant(false)
    {
    	NavLinkComp = ObjectInitializer.CreateDefaultSubobject<UNavLinkCustomComponent>(this, TEXT("NavLinkObjectComp"));
    	NavLinkComp->SetNavigationRelevancy(false);
    }

    bool ANavLinkObject::IsNavLinkEnabled() const
    {
    	return NavLinkComp->IsEnabled();
    }

    void ANavLinkObject::SetNavLinkEnabled(bool bEnabled)
    {
    	NavLinkComp->SetEnabled(bEnabled);
    }

    FBox ANavLinkObject::GetNavigationBounds() const
    {
    	return GetComponentsBoundingBox();
    }

    bool ANavLinkObject::GetNavigationLinksClasses(TArray<TSubclassOf<UNavLinkDefinition> >& OutClasses) const
    {
    	return false;
    }

    #if WITH_EDITOR
    void ANavLinkObject::PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent)
    {
    	Super::PostEditChangeProperty(PropertyChangedEvent);

    	if (PropertyChangedEvent.Property && PropertyChangedEvent.Property->GetFName() == GET_MEMBER_NAME_CHECKED(ANavLinkObject, bNavLinkIsRelevant))
    	{
    		NavLinkComp->SetNavigationRelevancy(bNavLinkIsRelevant);
    	}
    }
    #endif // WITH_EDITOR