MovieSceneEventTrack.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "UObject/ObjectMacros.h"
#include "MovieSceneNameableTrack.h"
#include "Tracks/MovieSceneSpawnTrack.h"
#include "MovieSceneObjectBindingID.h"
#include "Compilation/IMovieSceneTrackTemplateProducer.h"
#include "Compilation/IMovieSceneDeterminismSource.h"
#include "MovieSceneEventTrack.generated.h"
 
struct FMovieSceneEvaluationTrack;
 
UENUM()
enum class EFireEventsAtPosition : uint8
{
    AtStartOfEvaluation,
    AtEndOfEvaluation,
    AfterSpawn,
};
 
UCLASS(MinimalAPI)
class UMovieSceneEventTrack
    : public UMovieSceneNameableTrack
    , public IMovieSceneTrackTemplateProducer
    , public IMovieSceneDeterminismSource
{
    GENERATED_BODY()
 
public:
 
    UMovieSceneEventTrack()
        : bFireEventsWhenForwards(true)
        , bFireEventsWhenBackwards(true)
        , EventPosition(EFireEventsAtPosition::AtEndOfEvaluation)
    {
#if WITH_EDITORONLY_DATA
        TrackTint = FColor(41, 98, 41, 150);
#endif
    }
 
public:
 
    // UMovieSceneTrack interface
 
    virtual void AddSection(UMovieSceneSection& Section) override;
    virtual bool SupportsType(TSubclassOf<UMovieSceneSection> SectionClass) const override;
    virtual UMovieSceneSection* CreateNewSection() override;
    virtual const TArray<UMovieSceneSection*>& GetAllSections() const override;
    virtual bool HasSection(const UMovieSceneSection& Section) const override;
    virtual bool IsEmpty() const override;
    virtual void RemoveAllAnimationData() override;
    virtual void RemoveSection(UMovieSceneSection& Section) override;
    virtual void RemoveSectionAt(int32 SectionIndex) override;
    virtual EMovieSceneCompileResult CustomCompile(FMovieSceneEvaluationTrack& Track, const FMovieSceneTrackCompilerArgs& Args) const override;
    virtual FMovieSceneEvalTemplatePtr CreateTemplateForSection(const UMovieSceneSection& InSection) const override;
    virtual void PostCompile(FMovieSceneEvaluationTrack& Track, const FMovieSceneTrackCompilerArgs& Args) const override;
    virtual bool SupportsMultipleRows() const override { return true; }
 
    virtual void PopulateDeterminismData(FMovieSceneDeterminismData& OutData, const TRange<FFrameNumber>& Range) const override;
 
#if WITH_EDITORONLY_DATA
    virtual void Serialize(FArchive& Ar) override;
    virtual void PostRename(UObject* OldOuter, const FName OldName) override;
#endif
 
#if WITH_EDITORONLY_DATA
    virtual FText GetDefaultDisplayName() const override;
#endif
 
public:
 
    UPROPERTY(EditAnywhere, Category=TrackEvent)
    uint32 bFireEventsWhenForwards:1;
 
    UPROPERTY(EditAnywhere, Category=TrackEvent)
    uint32 bFireEventsWhenBackwards:1;
 
    UPROPERTY(EditAnywhere, Category=TrackEvent)
    EFireEventsAtPosition EventPosition;
 
private:
    
    UPROPERTY()
    TArray<TObjectPtr<UMovieSceneSection>> Sections;
};