UILayer.h

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#pragma once
#include "CoreMinimal.h"
#include "GameplayTagContainer.h"
#include "UIContext.h"
#include "UILayer.generated.h"
 
struct FGameplayTag;
class UUIManagementSubsystem;
class UUserWidgetBase;
 
 
UCLASS(BlueprintType)
class UUILayer : public UObject
{
    GENERATED_BODY()
 
public:
    void InitLayer(FGameplayTag InLayerTag, int32 InPriority, UUIManagementSubsystem* InSubsystem);
    virtual void Init() { }
 
public:
    void ShowLayer(const FUIContext* Context = nullptr);
    void HideLayer(const FUIContext* Context = nullptr);
 
    void PushWidget(UUserWidgetBase* Widget);
    UUserWidgetBase* PopWidget();
    void RemoveWidget(UUserWidgetBase* Widget);
 
    bool ContainWidget(UUserWidgetBase* Widget) const;
    UUserWidgetBase* GetTopWidget() const;
    int32 WidgetCount() const;
    void ClearWidget();
    
#if WITH_EDITOR
    CK_UE_API void PrintWidgetsToScreen() const;
#endif
 
public:
    virtual void OnPushedToLayerStack() { }
    virtual void OnPoppedFromLayerStack() { }
 
public:
    UFUNCTION(BlueprintCallable, Category = "UI|Layer")
    FORCEINLINE TArray<UUserWidgetBase*> GetWidgets() const
    {
        return UserWidgets;
    }
 
    FORCEINLINE bool IsVisible() const
    {
        return bVisible;
    }
 
    FORCEINLINE FGameplayTag GetTag() const
    {
        return LayerTag;
    }
 
    FORCEINLINE int32 GetPriority() const
    {
        return Priority;
    }
 
protected:
    UPROPERTY(EditAnywhere, BlueprintReadOnly)
    FGameplayTag LayerTag;
 
    UPROPERTY(Transient)
    int32 Priority = 0;
 
    UPROPERTY(Transient)
    bool bTick = false;
 
    UPROPERTY(Transient)
    bool bVisible = true;
 
    UPROPERTY(Transient)
    TArray<TObjectPtr<UUserWidgetBase>> UserWidgets;
 
    UPROPERTY(Transient)
    TObjectPtr<UUIManagementSubsystem> OwnerSubsystem;
};