SLeafWidget.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "Misc/Attribute.h"
#include "Layout/Visibility.h"
#include "Widgets/SWidget.h"
#include "Layout/Children.h"
 
class FArrangedChildren;
class FPaintArgs;
class FSlateWindowElementList;
 
template <>
struct TWidgetTypeTraits<class SLeafWidget>
{
    static constexpr bool SupportsInvalidation() { return true; }
};
 
class SLeafWidget
    : public SWidget
{
public:
    SLATECORE_API SLeafWidget();
 
    SLATECORE_API virtual ~SLeafWidget();
 
    SLATECORE_API virtual void SetVisibility( TAttribute<EVisibility> InVisibility ) override final;
 
private:
 
    // Begin SWidget overrides
 
    virtual int32 OnPaint( const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyCullingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const override = 0;
    
    virtual FVector2D ComputeDesiredSize(float) const override = 0;
    
    SLATECORE_API virtual FChildren* GetChildren() override;
 
    SLATECORE_API virtual void OnArrangeChildren( const FGeometry& AllottedGeometry, FArrangedChildren& ArrangedChildren ) const override;
};