SComponentPreviewer.h

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// Copyright 2025 Lost in Game Studio. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "Widgets/SCompoundWidget.h"
#include "Widgets/Layout/SConstraintCanvas.h"
#include "Widgets/SOverlay.h"
 
class ULayoutComponent;
class SConstraintCanvas;

class TOUCHINTERFACE_API SComponentPreviewer : public SCompoundWidget
{
public:
    SLATE_BEGIN_ARGS(SComponentPreviewer)
        : _Component(nullptr)
        , _bPaintHitBox(false)
        , _Opacity(1.0f)
    {
    }
    SLATE_ARGUMENT(ULayoutComponent*, Component)
    SLATE_ARGUMENT(bool, bPaintHitBox)
    SLATE_ARGUMENT(float, Opacity)
    SLATE_ARGUMENT(bool, bShowPressedState)
 
    SLATE_END_ARGS()
 
    SComponentPreviewer();

    void Construct(const FArguments& InArgs);
    
    void ConstructDecorator() const;
    
    virtual int32 OnPaint(const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyCullingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled) const override;
    
    void SetOpacity(const float InOpacity) { Opacity = InOpacity; }
 
    void SetPaintHitBox(const bool bPaint) { bPaintHitBox = bPaint; }
 
    void SetPressedStateVisibility(const bool bVisible) { bShowPressedState = bVisible; }
 
    FName GetComponentName() const;
 
    bool IsInside(FVector2D AbsoluteLocation) const;
 
    SConstraintCanvas::FSlot* CreateChildSlot(FAnchors ChildAnchors, const FVector2D ChildAlignment, FVector4f ChildAnchorOffset);
 
private:
    TSharedPtr<SOverlay> OverlayWidget;
    
    TSharedPtr<SConstraintCanvas> CanvasWidget;
    
    TObjectPtr<ULayoutComponent> Component;
 
    TArray<TSharedPtr<SComponentPreviewer>> Children;
    
    uint8 bPaintHitBox:1;
    uint8 bShowPressedState:1;
 
    float Opacity;
};