SWorldWidgetScreenLayer.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "Layout/Visibility.h"
#include "Widgets/DeclarativeSyntaxSupport.h"
#include "Engine/LocalPlayer.h"
#include "Widgets/SCompoundWidget.h"
#include "Widgets/Layout/SConstraintCanvas.h"
#include "UObject/ObjectKey.h"
 
class USceneComponent;
 
class SWorldWidgetScreenLayer : public SCompoundWidget
{
    SLATE_BEGIN_ARGS(SWorldWidgetScreenLayer)
    {
        _Visibility = EVisibility::SelfHitTestInvisible;
    }
    SLATE_END_ARGS()
 
public:
    void Construct(const FArguments& InArgs, const FLocalPlayerContext& InPlayerContext);
 
    virtual void Tick(const FGeometry& AllottedGeometry, const double InCurrentTime, const float InDeltaTime) override;
    virtual FVector2D ComputeDesiredSize(float) const override;
 
    void SetWidgetDrawSize(FVector2D DrawSize);
 
    void SetWidgetPivot(FVector2D Pivot);
 
    void AddComponent(USceneComponent* Component, TSharedRef<SWidget> Widget);
 
    void RemoveComponent(USceneComponent* Component);
 
private:
    FLocalPlayerContext PlayerContext;
 
    FVector2D DrawSize;
    FVector2D Pivot;
 
    class FComponentEntry
    {
    public:
        FComponentEntry();
        ~FComponentEntry();
 
    public:
 
        bool bRemoving = false;
        TWeakObjectPtr<USceneComponent> Component;
        class UWidgetComponent* WidgetComponent;
 
        TSharedPtr<SWidget> ContainerWidget;
        TSharedPtr<SWidget> Widget;
        SConstraintCanvas::FSlot* Slot;
    };
 
    void RemoveEntryFromCanvas(SWorldWidgetScreenLayer::FComponentEntry& Entry);
 
    TMap<FObjectKey, FComponentEntry> ComponentMap;
    TSharedPtr<SConstraintCanvas> Canvas;
};