SCompoundWidget.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "Misc/Attribute.h"
#include "Styling/SlateColor.h"
#include "Types/SlateAttribute.h"
#include "Layout/Visibility.h"
#include "Widgets/SWidget.h"
#include "Layout/Children.h"
 
class FArrangedChildren;
class FPaintArgs;
class FSlateWindowElementList;
 
class SCompoundWidget : public SWidget
{
    SLATE_DECLARE_WIDGET_API(SCompoundWidget, SWidget, SLATECORE_API)
 
public:
 
    const FVector2D GetContentScale() const
    {
        return ContentScaleAttribute.Get();
    }
 
    void SetContentScale( TAttribute<FVector2D> InContentScale )
    {
        ContentScaleAttribute.Assign(*this, MoveTemp(InContentScale));
    }
 
    FLinearColor GetColorAndOpacity() const
    {
        return ColorAndOpacityAttribute.Get();
    }
 
    void SetColorAndOpacity( TAttribute<FLinearColor> InColorAndOpacity )
    {
        ColorAndOpacityAttribute.Assign(*this, MoveTemp(InColorAndOpacity));
    }
 
    void SetForegroundColor( TAttribute<FSlateColor> InForegroundColor )
    {
        ForegroundColorAttribute.Assign(*this, MoveTemp(InForegroundColor));
    }
 
public:
 
    // SWidgetOverrides
    SLATECORE_API virtual int32 OnPaint( const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyCullingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled ) const override;
    SLATECORE_API virtual FChildren* GetChildren() override;
    SLATECORE_API virtual void OnArrangeChildren( const FGeometry& AllottedGeometry, FArrangedChildren& ArrangedChildren ) const override;
    SLATECORE_API virtual FSlateColor GetForegroundColor() const override;
 
public:
    SLATECORE_API virtual void SetVisibility( TAttribute<EVisibility> InVisibility ) override final;
 
protected:
    // Begin SWidget overrides.
    SLATECORE_API virtual FVector2D ComputeDesiredSize(float) const override;
    // End SWidget overrides.
 
    TSlateAttributeRef<FVector2D> GetContentScaleAttribute() const { return TSlateAttributeRef<FVector2D>(SharedThis(this), ContentScaleAttribute); }
 
    TSlateAttributeRef<FLinearColor> GetColorAndOpacityAttribute() const { return TSlateAttributeRef<FLinearColor>{SharedThis(this), ColorAndOpacityAttribute}; }
 
    TSlateAttributeRef<FSlateColor> GetForegroundColorAttribute() const {   return TSlateAttributeRef<FSlateColor>{SharedThis(this), ForegroundColorAttribute}; }
 
protected:
 
    SLATECORE_API SCompoundWidget();
    SLATECORE_API virtual ~SCompoundWidget();
 
    struct FCompoundWidgetOneChildSlot : ::TSingleWidgetChildrenWithBasicLayoutSlot<EInvalidateWidgetReason::None>
    {
        friend SCompoundWidget;
        using ::TSingleWidgetChildrenWithBasicLayoutSlot<EInvalidateWidgetReason::None>::TSingleWidgetChildrenWithBasicLayoutSlot;
    };
 
    FCompoundWidgetOneChildSlot ChildSlot;
 
private:
    TSlateAttribute<FVector2D> ContentScaleAttribute;
 
    TSlateAttribute<FLinearColor> ColorAndOpacityAttribute;
 
    TSlateAttribute<FSlateColor> ForegroundColorAttribute;
};