TypedElementHierarchyInterface.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Containers/Array.h"
#include "Elements/Framework/TypedElementHandle.h"
#include "UObject/Interface.h"
#include "UObject/ObjectMacros.h"
#include "UObject/UObjectGlobals.h"
 
#include "TypedElementHierarchyInterface.generated.h"
 
class UObject;
struct FFrame;
 
UINTERFACE(MinimalAPI, BlueprintType, meta = (CannotImplementInterfaceInBlueprint))
class UTypedElementHierarchyInterface : public UInterface
{
    GENERATED_BODY()
};
 
class ITypedElementHierarchyInterface
{
    GENERATED_BODY()
 
public:
    virtual FTypedElementHandle GetParentElement(const FTypedElementHandle& InElementHandle, const bool bAllowCreate = true) { return FTypedElementHandle(); }
 
    virtual void GetChildElements(const FTypedElementHandle& InElementHandle, TArray<FTypedElementHandle>& OutElementHandles, const bool bAllowCreate = true) {}
 
    UFUNCTION(BlueprintCallable, Category="TypedElementInterfaces|Hierarchy")
    TYPEDELEMENTRUNTIME_API virtual FScriptTypedElementHandle GetParentElement(const FScriptTypedElementHandle& InElementHandle, const bool bAllowCreate = true);
 
    UFUNCTION(BlueprintCallable, Category="TypedElementInterfaces|Hierarchy")
    TYPEDELEMENTRUNTIME_API virtual void GetChildElements(const FScriptTypedElementHandle& InElementHandle, TArray<FScriptTypedElementHandle>& OutElementHandles, const bool bAllowCreate = true);
 
private:
    
    TYPEDELEMENTRUNTIME_API virtual class UTypedElementRegistry& GetRegistry() const;
};
 
template <>
struct TTypedElement<ITypedElementHierarchyInterface> : public TTypedElementBase<ITypedElementHierarchyInterface>
{
    FTypedElementHandle GetParentElement(const bool bAllowCreate = true) const { return InterfacePtr->GetParentElement(*this, bAllowCreate); }
    void GetChildElements(TArray<FTypedElementHandle>& OutElementHandles, const bool bAllowCreate = true) const { return InterfacePtr->GetChildElements(*this, OutElementHandles, bAllowCreate); }
};