LinkableScrollBar.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "Widgets/Layout/SScrollBar.h"
 
class SLinkableScrollBar : public SScrollBar
{
public:
    
    SLATE_API virtual void SetState(float InOffsetFraction, float InThumbSizeFraction, bool bCallOnUserScrolled = false) override;
 
    static SLATE_API void LinkScrollBars(TSharedRef<SLinkableScrollBar> Left, TSharedRef<SLinkableScrollBar> Right, TAttribute<TArray<FVector2f>> ScrollSyncRate);
 
private:
    TWeakPtr<SLinkableScrollBar> LinkedScrollBarRight;
    TWeakPtr<SLinkableScrollBar> LinkedScrollBarLeft;
 
    // list of scroll distance pairs that determine variable scroll rate.
    // scroll values of Left panel will match X components while the right panel will match Y components
    TAttribute<TArray<FVector2f>> ScrollSyncRateRight;
    TAttribute<TArray<FVector2f>> ScrollSyncRateLeft;
};