SFlipbookLayer.h

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// Copyright 2025 Lost in Game Studio. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "Widgets/SLeafWidget.h"
 
class UMaterialInterface;
class UTexture2DArray;
 
class TOUCHINTERFACE_API SFlipbookLayer : public SLeafWidget
{
public:
    SLATE_BEGIN_ARGS(SFlipbookLayer)
        : _Material(nullptr)
        , _FlipbookImages(nullptr)
        , _Grid(FVector2D(2,2))
        , _Speed(30.0f)
        , _AnimationPhase(0.0f)
        , _AutoAnimate(true)
        , _FlipbookOpacity(1.0f)
        {}
        SLATE_ARGUMENT(FSlateBrush, Flipbook)
        SLATE_ARGUMENT(TObjectPtr<UMaterialInterface>, Material)
        SLATE_ARGUMENT(UTexture2DArray*, FlipbookImages)
        SLATE_ARGUMENT(FVector2D, Grid)
        SLATE_ARGUMENT(float, Speed)
        SLATE_ARGUMENT(float, AnimationPhase)
        SLATE_ARGUMENT(bool, AutoAnimate)
        SLATE_ARGUMENT(float, FlipbookOpacity)
 
    SLATE_END_ARGS()
 
    SFlipbookLayer();

    void Construct(const FArguments& InArgs);
 
    virtual FVector2D ComputeDesiredSize(float LayoutScaleMultiplier) const override;
 
    virtual int32 OnPaint(const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyCullingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled) const override;
 
    virtual void Tick(const FGeometry& AllottedGeometry, const double InCurrentTime, const float InDeltaTime) override;
 
    void SetBrush(const FSlateBrush NewBrush);
 
    void SetBrushResource(UObject* Resource);
 
    void SetGrid(const FVector2D GridSize);
 
    void SetSpeed(const float Value);
 
    void SetAnimationPhase(const float Value);
 
    void SetAutoAnimation(const bool bAuto);
 
    void SetFlipbookOpacity(const float Value);
 
private:
    FSlateBrush Flipbook;
 
    UTexture2DArray* Images;
    
    FVector2D Grid;
    
    float Speed;
    
    float AnimationPhase;
    
    uint8 bAutoAnimate:1;
    
    float FlipbookOpacity;
 
    TArray<FBox2d> UvRegions;
 
    int32 Index;
 
    float Counter;
 
    float WaitDuration;
};