CompositeCurveTable.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CurveTable.h"
#include "CompositeCurveTable.generated.h"
 
UCLASS(MinimalAPI)
class UCompositeCurveTable
    : public UCurveTable
{
    GENERATED_UCLASS_BODY()
 
    //~ Begin UObject Interface.
    ENGINE_API virtual void GetPreloadDependencies(TArray<UObject*>& OutDeps) override;
    ENGINE_API virtual void Serialize(FArchive& Ar) override;
    ENGINE_API virtual void PostLoad() override;
    //~ End UObject Interface
 
#if WITH_EDITOR
    virtual void PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent) override;
 
    virtual void PostEditUndo() override;
#endif // WITH_EDITOR
 
    ENGINE_API virtual void EmptyTable() override;
 
    // Support for runtime modification of parent tables, 
    // Be aware this can be slow and can cause hitches during gameplay
    ENGINE_API void AppendParentTables(const TArray<UCurveTable*>& NewTables);
 
protected:
 
    // Searches the parent tables to see if there are any loops.
    // Returns a pointer to the first table found that depends on itself if a loop exists. Returns nullptr if no loops are found.
    const UCompositeCurveTable* FindLoops(TArray<const UCompositeCurveTable*> AlreadySeenTables) const;
 
    void UpdateCachedRowMap(bool bWarnOnInvalidChildren = true);
 
    void OnParentTablesUpdated(EPropertyChangeType::Type ChangeType = EPropertyChangeType::Unspecified);
 
    // Parent tables
    // Tables with higher indices override data in tables with lower indices
    UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = Tables)
    TArray<TObjectPtr<UCurveTable>> ParentTables;
 
    // temporary copy used to detect changes so we can update delegates correctly on removal
    UPROPERTY(transient)
    TArray<TObjectPtr<UCurveTable>> OldParentTables;
 
    // true if this asset is currently being loaded; false otherwise
    uint8 bIsLoading : 1;
 
    // true if we're already in the middle of updating parent tables for this asset
    uint8 bUpdatingParentTables : 1;
};