SSimpleGradient.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "Misc/Attribute.h"
#include "Widgets/DeclarativeSyntaxSupport.h"
#include "Widgets/SCompoundWidget.h"
 
class FPaintArgs;
class FSlateWindowElementList;
 
class SSimpleGradient
    : public SCompoundWidget
{
public:
 
        SLATE_BEGIN_ARGS(SSimpleGradient)
            : _StartColor(FLinearColor(0.0f, 0.0f, 0.0f))
            , _EndColor(FLinearColor(1.0f, 1.0f, 1.0f))
            , _HasAlphaBackground(false)
            , _Orientation(Orient_Vertical)
        { }
 
        SLATE_ATTRIBUTE(FLinearColor, StartColor)
        
        
        SLATE_ATTRIBUTE(FLinearColor, EndColor)
 
        
        SLATE_ATTRIBUTE(bool, HasAlphaBackground)
 
        
        SLATE_ATTRIBUTE(EOrientation, Orientation)
 
    SLATE_END_ARGS()
 
public:
    SLATE_API SSimpleGradient();
 
    SLATE_API void Construct( const FArguments& InArgs );
 
protected:
 
    // SCompoundWidget overrides
 
    SLATE_API virtual int32 OnPaint( const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyCullingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const override;
 
private:
 
    TSlateAttribute<FLinearColor, EInvalidateWidgetReason::Paint> StartColor;
 
    TSlateAttribute<FLinearColor, EInvalidateWidgetReason::Paint> EndColor;
 
    bool bHasAlphaBackground;
    
    EOrientation Orientation;
};