INotifyFieldValueChanged.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "FieldNotificationId.h"
#include "IFieldNotificationClassDescriptor.h"
#include "UObject/Interface.h"
 
#include "INotifyFieldValueChanged.generated.h"
 
DECLARE_DYNAMIC_DELEGATE_TwoParams(FFieldValueChangedDynamicDelegate, UObject*, Object, FFieldNotificationId, Field);
 
 
UINTERFACE(MinimalAPI, NotBlueprintable)
class UNotifyFieldValueChanged : public UInterface
{
    GENERATED_BODY()
};
 
 
class INotifyFieldValueChanged : public IInterface
{
    GENERATED_BODY()
 
public:
    // using "not checked" user policy (means race detection is disabled) because this delegate is stored in a container and causes its reallocation
    // from inside delegate's execution. This is incompatible with race detection that needs to access the delegate instance after its execution
    using FFieldValueChangedDelegate = TDelegate<void(UObject*, UE::FieldNotification::FFieldId), FNotThreadSafeNotCheckedDelegateUserPolicy>;
 
public:
    virtual FDelegateHandle AddFieldValueChangedDelegate(UE::FieldNotification::FFieldId InFieldId, FFieldValueChangedDelegate InNewDelegate) = 0;
 
    virtual bool RemoveFieldValueChangedDelegate(UE::FieldNotification::FFieldId InFieldId, FDelegateHandle InHandle) = 0;
 
    virtual int32 RemoveAllFieldValueChangedDelegates(FDelegateUserObjectConst InUserObject) = 0;
 
    virtual int32 RemoveAllFieldValueChangedDelegates(UE::FieldNotification::FFieldId InFieldId, FDelegateUserObjectConst InUserObject) = 0;
 
    virtual const UE::FieldNotification::IClassDescriptor& GetFieldNotificationDescriptor() const = 0;
 
    virtual void BroadcastFieldValueChanged(UE::FieldNotification::FFieldId InFieldId) = 0;
};