NavigationUIComponent.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "Input/NavigationMetadata.h"
#include "Extensions/UIComponent.h"
#include "UObject/ObjectMacros.h"
 
#include "NavigationUIComponent.generated.h"
 
class UWidget;
 
DECLARE_DYNAMIC_MULTICAST_DELEGATE_ThreeParams(FOnNavigationTransition, EUINavigation, Type, UWidget*, OldFocusedWidget, UWidget*, NewFocusedWidget);
 
UCLASS(BlueprintType, Experimental)
class UNavigationUIComponent : public UUIComponent
{
    GENERATED_BODY()
 
private:
    virtual void OnConstruct() override;
    virtual void OnDestruct() override;
    virtual void OnGraphRenamed(UEdGraph* Graph, const FName& OldName, const FName& NewName) override;
 
    void HandleNavigationTransition(const FNavigationTransition& NavigationTransition);
 
public:
    UPROPERTY()
    FName OnNavigationEntered; 
 
    UPROPERTY()
    FName OnNavigationExited;
 
private:
 
    /* Delegates are the concrete functions from the provided user provided function names */
    UPROPERTY(BlueprintAssignable, Category = "Navigation", meta = (AllowPrivateAccess = true, DisplayName = "On Navigation Entered"))
    FOnNavigationTransition OnNavigationEnteredDelegate;
 
    UPROPERTY(BlueprintAssignable, Category = "Navigation", meta = (AllowPrivateAccess = true, DisplayName = "On Navigation Exited"))
    FOnNavigationTransition OnNavigationExitedDelegate;
 
    TSharedPtr<FNavigationTransitionMetadata> NavigationTransitionMetadata;
};