PropertyValueFactory.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once 
 
#include "CoreMinimal.h"
#include "Modules/ModuleInterface.h"
#include "Modules/ModuleManager.h"
 
#include "Framework/PropertyViewer/PropertyPath.h"
#include "Framework/SlateDelegates.h"
#include "UObject/Field.h"
#include "UObject/Class.h"
 
class SWidget;
 
namespace UE::PropertyViewer
{
class INotifyHook;
 
namespace Private
{
class FPropertyValueFactoryImpl;
} // namespace
 
 
class FPropertyValueFactory
{
public:
    struct FHandle
    {
    private:
        friend FPropertyValueFactory;
        int32 Id = 0;
    public:
        bool operator== (FHandle Other) const
        {
            return Id == Other.Id;
        }
        bool operator!= (FHandle Other) const
        {
            return Id != Other.Id;
        }
        bool IsValid() const
        {
            return Id != 0;
        }
    };
 
    struct FGenerateArgs
    {
        FPropertyPath Path;
        INotifyHook* NotifyHook = nullptr;
        bool bCanEditValue = false;
    };
 
    DECLARE_DELEGATE_RetVal_OneParam(TSharedPtr<SWidget>, FOnGenerate, FGenerateArgs);
 
public:
    ADVANCEDWIDGETS_API FPropertyValueFactory();
    FPropertyValueFactory(const FPropertyValueFactory&) = delete;
    FPropertyValueFactory& operator=(const FPropertyValueFactory&) = delete;
 
    ADVANCEDWIDGETS_API TSharedPtr<SWidget> Generate(FGenerateArgs Args) const;
    ADVANCEDWIDGETS_API TSharedPtr<SWidget> GenerateDefault(FGenerateArgs Args) const;
 
    ADVANCEDWIDGETS_API bool HasCustomPropertyValue(const FFieldClass* Property) const;
    ADVANCEDWIDGETS_API bool HasCustomPropertyValue(const UStruct* Struct) const;
 
    ADVANCEDWIDGETS_API FHandle Register(const FFieldClass* Field, FOnGenerate OnGenerate);
    ADVANCEDWIDGETS_API FHandle Register(const UStruct* Struct, FOnGenerate OnGenerate);
    ADVANCEDWIDGETS_API void Unregister(FHandle Handle);
 
private:
    static ADVANCEDWIDGETS_API FHandle MakeHandle();
    TPimplPtr<Private::FPropertyValueFactoryImpl> Impl;
};
 
} //namespace