[UE4] ノードの入力ピンによって出力ピン等の内容を動的に変える仕組みについて～実装例編～

改訂バージョン: Unreal Engine 4.21

こちらは UE4 Advent Calendar 2015 4日目の記事です。
プログラマ向けの内容となります。
解説編をまだ読んでいない方はコチラ。

実装サンプル

今回は実装サンプルとして、以下のようなカスタムノードを作ってみました。

こんなノードがあって、

SampleDataA を選択すると、SampleDataSettingA を引数に取る設定コピーノードになります。
出力の型は SampleDataA のリファレンスです。

同じような SampleDataB もあります。

もちろん SampleDataA に対応するものに対して SampleDataB のものは入力できません。

これを実装すると、以下のようになります。
詳しい解説は大きくなりすぎるので割愛しますが、気になる方は読んでみてください。

まず、SampleData 系の定義です。

// Fill out your copyright notice in the Description page of Project Settings.
#pragma once

#include “CoreMinimal.h”
#include “Object.h”
#include “SampleData.generated.h”

UCLASS()
class MYPROJECT_API USampleData : public UObject
{
	GENERATED_BODY()

public:
	// 設定クラス取得
	virtual UClass* GetSettingClass() const { return nullptr; }
};

////////////////////////////////////////////////////////////////////////////////
// サンプルデータA

UCLASS()
class MYPROJECT_API USampleDataSettingA : public UObject
{
	GENERATED_BODY()

public:
	int32 PropertyA;
};

UCLASS()
class MYPROJECT_API USampleDataA : public USampleData
{
	GENERATED_BODY()

		virtual void PostInitProperties() override
	{
		Super::PostInitProperties();

		if (!HasAnyFlags(RF_ClassDefaultObject))
		{
			Setting = NewObject(GetTransientPackage(), USampleDataSettingA::StaticClass());
		}
	}

public:
	// 設定コピー関数
	void CopySettingA(const USampleDataSettingA& InSetting)
	{
		UE_LOG(LogTemp, Log, TEXT(“ * ******Copy SettingA”));
		Setting->PropertyA = InSetting.PropertyA;
	}

	// 静的設定コピー関数（IntermediateNodeによる呼び出し用）
	UFUNCTION(BlueprintCallable, Category = “Sample”, meta = (BlueprintInternalUseOnly = “true”))
		static USampleDataA* CopySettingA_Static(USampleDataA* Target, const USampleDataSettingA* Setting)
	{
		if (Target == nullptr || Setting == nullptr)
		{
			return Target;
		}

		Target->CopySettingA(*Setting);

		return Target;
	}

	// 設定クラス取得
	virtual UClass* GetSettingClass() const override
	{
		return USampleDataSettingA::StaticClass();
	}

private:
	UPROPERTY()
		USampleDataSettingA* Setting;
};

////////////////////////////////////////////////////////////////////////////////
// サンプルデータB

UCLASS()
class MYPROJECT_API USampleDataSettingB : public UObject
{
	GENERATED_BODY()

public:
	float PropertyB;
};

UCLASS()
class MYPROJECT_API USampleDataB : public USampleData
{
	GENERATED_BODY()

		virtual void PostInitProperties() override
	{
		Super::PostInitProperties();

		if (!HasAnyFlags(RF_ClassDefaultObject))
		{
			Setting = NewObject(GetTransientPackage(), USampleDataSettingB::StaticClass());
		}
	}

public:
	// 設定コピー関数
	void CopySettingB(const USampleDataSettingB& InSetting)
	{
		UE_LOG(LogTemp, Log, TEXT(“ * ******Copy SettingB”));
		Setting->PropertyB = InSetting.PropertyB;
	}

	// 静的設定コピー関数（IntermediateNodeによる呼び出し用）
	UFUNCTION(BlueprintCallable, Category = “Sample”, meta = (BlueprintInternalUseOnly = “true”))
		static USampleDataB* CopySettingB_Static(USampleDataB* Target, const USampleDataSettingB* Setting)
	{
		if (Target == nullptr || Setting == nullptr)
		{
			return Target;
		}

		Target->CopySettingB(*Setting);

		return Target;
	}

	// 設定クラス取得
	virtual UClass* GetSettingClass() const override
	{
		return USampleDataSettingB::StaticClass();
	}

private:
	UPROPERTY()
		USampleDataSettingB* Setting;
};

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// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

#include “CoreMinimal.h”

#include “Object.h”

#include “SampleData.generated.h”

UCLASS()

class MYPROJECT_API USampleData : public UObject

{

GENERATED_BODY()

public:

// 設定クラス取得

virtual UClass* GetSettingClass() const { return nullptr; }

};

////////////////////////////////////////////////////////////////////////////////

// サンプルデータA

UCLASS()

class MYPROJECT_API USampleDataSettingA : public UObject

{

GENERATED_BODY()

public:

int32 PropertyA;

};

UCLASS()

class MYPROJECT_API USampleDataA : public USampleData

{

GENERATED_BODY()

virtual void PostInitProperties() override

{

Super::PostInitProperties();

if (!HasAnyFlags(RF_ClassDefaultObject))

{

Setting = NewObject(GetTransientPackage(), USampleDataSettingA::StaticClass());

}

public:

// 設定コピー関数

void CopySettingA(const USampleDataSettingA& InSetting)

{

UE_LOG(LogTemp, Log, TEXT(“ * ******Copy SettingA”));

Setting->PropertyA = InSetting.PropertyA;

}

// 静的設定コピー関数（IntermediateNodeによる呼び出し用）

UFUNCTION(BlueprintCallable, Category = “Sample”, meta = (BlueprintInternalUseOnly = “true”))

static USampleDataA* CopySettingA_Static(USampleDataA* Target, const USampleDataSettingA* Setting)

{

if (Target == nullptr || Setting == nullptr)

{

return Target;

}

Target->CopySettingA(*Setting);

return Target;

}

// 設定クラス取得

virtual UClass* GetSettingClass() const override

{

return USampleDataSettingA::StaticClass();

}

private:

UPROPERTY()

USampleDataSettingA* Setting;

};

////////////////////////////////////////////////////////////////////////////////

// サンプルデータB

UCLASS()

class MYPROJECT_API USampleDataSettingB : public UObject

{

GENERATED_BODY()

public:

float PropertyB;

};

UCLASS()

class MYPROJECT_API USampleDataB : public USampleData

{

GENERATED_BODY()

virtual void PostInitProperties() override

{

Super::PostInitProperties();

if (!HasAnyFlags(RF_ClassDefaultObject))

{

Setting = NewObject(GetTransientPackage(), USampleDataSettingB::StaticClass());

}

public:

// 設定コピー関数

void CopySettingB(const USampleDataSettingB& InSetting)

{

UE_LOG(LogTemp, Log, TEXT(“ * ******Copy SettingB”));

Setting->PropertyB = InSetting.PropertyB;

}

// 静的設定コピー関数（IntermediateNodeによる呼び出し用）

UFUNCTION(BlueprintCallable, Category = “Sample”, meta = (BlueprintInternalUseOnly = “true”))

static USampleDataB* CopySettingB_Static(USampleDataB* Target, const USampleDataSettingB* Setting)

{

if (Target == nullptr || Setting == nullptr)

{

return Target;

}

Target->CopySettingB(*Setting);

return Target;

}

// 設定クラス取得

virtual UClass* GetSettingClass() const override

{

return USampleDataSettingB::StaticClass();

}

private:

UPROPERTY()

USampleDataSettingB* Setting;

};

そして上で例に挙げたコピーノードを作成するノードクラスです。

// Fill out your copyright notice in the Description page of Project Settings.
#pragma once

#include “CoreMinimal.h”
#include “K2Node.h”
#include “EdGraph/EdGraphNodeUtils.h” // for FNodeTextCache
#include “K2Node_CopySampleDataSetting.generated.h”

UCLASS()
class MYPROJECTEDITOR_API UK2Node_CopySampleDataSetting : public UK2Node
{
	GENERATED_UCLASS_BODY()

		// Begin UEdGraphNode interface.
		virtual void AllocateDefaultPins() override;
	virtual FText GetNodeTitle(ENodeTitleType::Type TitleType) const override;
	virtual void PinDefaultValueChanged(UEdGraphPin* Pin) override;
	virtual FText GetTooltipText() const override;
	virtual bool HasExternalDependencies(TArray* OptionalOutput) const override;
	virtual bool IsCompatibleWithGraph(const UEdGraph* TargetGraph) const override;
	virtual void PinConnectionListChanged(UEdGraphPin* Pin);
	// End UEdGraphNode interface.

	// Begin UK2Node interface
	virtual bool IsNodeSafeToIgnore() const override { return true; }
	virtual void ReallocatePinsDuringReconstruction(TArray<UEdGraphPin*>& OldPins) override;
	virtual void GetNodeAttributes(TArray<TKeyValuePair<FString, FString>>& OutNodeAttributes) const override;
	virtual void GetMenuActions(FBlueprintActionDatabaseRegistrar& ActionRegistrar) const override;
	virtual FText GetMenuCategory() const override;
	virtual void ExpandNode(class FKismetCompilerContext& CompilerContext, UEdGraph* SourceGraph) override;
	// End UK2Node interface

private:
	void CreatePinsForClass(UClass* InClass, TArray<UEdGraphPin*>* OutClassPins = nullptr);

	UEdGraphPin* GetClassPin(const TArray<UEdGraphPin*>* InPinsToSearch = NULL) const;
	UEdGraphPin* GetTargetPin() const;
	UEdGraphPin* GetSettingPin() const;
	UEdGraphPin* GetThenPin() const;
	UEdGraphPin* GetResultPin() const;

	UClass* GetSampleDataClass(const TArray<UEdGraphPin*>* InPinsToSearch = NULL) const;
	UClass* GetClassPinBaseClass() const;

	bool IsSpawnVarPin(UEdGraphPin* Pin);
	void SetPinToolTip(UEdGraphPin& MutatablePin, const FText& PinDescription) const;
	void OnClassPinChanged();

private:
	FNodeTextCache CachedNodeTitle;
};

// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

#include “CoreMinimal.h”

#include “K2Node.h”

#include “EdGraph/EdGraphNodeUtils.h” // for FNodeTextCache

#include “K2Node_CopySampleDataSetting.generated.h”

UCLASS()

class MYPROJECTEDITOR_API UK2Node_CopySampleDataSetting : public UK2Node

{

GENERATED_UCLASS_BODY()

// Begin UEdGraphNode interface.

virtual void AllocateDefaultPins() override;

virtual FText GetNodeTitle(ENodeTitleType::Type TitleType) const override;

virtual void PinDefaultValueChanged(UEdGraphPin* Pin) override;

virtual FText GetTooltipText() const override;

virtual bool HasExternalDependencies(TArray* OptionalOutput) const override;

virtual bool IsCompatibleWithGraph(const UEdGraph* TargetGraph) const override;

virtual void PinConnectionListChanged(UEdGraphPin* Pin);

// End UEdGraphNode interface.

// Begin UK2Node interface

virtual bool IsNodeSafeToIgnore() const override { return true; }

virtual void ReallocatePinsDuringReconstruction(TArray<UEdGraphPin*>& OldPins) override;

virtual void GetNodeAttributes(TArray<TKeyValuePair<FString, FString>>& OutNodeAttributes) const override;

virtual void GetMenuActions(FBlueprintActionDatabaseRegistrar& ActionRegistrar) const override;

virtual FText GetMenuCategory() const override;

virtual void ExpandNode(class FKismetCompilerContext& CompilerContext, UEdGraph* SourceGraph) override;

// End UK2Node interface

private:

void CreatePinsForClass(UClass* InClass, TArray<UEdGraphPin*>* OutClassPins = nullptr);

UEdGraphPin* GetClassPin(const TArray<UEdGraphPin*>* InPinsToSearch = NULL) const;

UEdGraphPin* GetTargetPin() const;

UEdGraphPin* GetSettingPin() const;

UEdGraphPin* GetThenPin() const;

UEdGraphPin* GetResultPin() const;

UClass* GetSampleDataClass(const TArray<UEdGraphPin*>* InPinsToSearch = NULL) const;

UClass* GetClassPinBaseClass() const;

bool IsSpawnVarPin(UEdGraphPin* Pin);

void SetPinToolTip(UEdGraphPin& MutatablePin, const FText& PinDescription) const;

void OnClassPinChanged();

private:

FNodeTextCache CachedNodeTitle;

};

// Fill out your copyright notice in the Description page of Project Settings.
// Fill out your copyright notice in the Description page of Project Settings.
#include “K2Node_CopySampleDataSetting.h”
#include “MyProjectEditor.h”
#include “GraphEditorSettings.h”
#include “BlueprintGraphDefinitions.h”
#include “BlueprintUtilities.h”
#include “Kismet2/BlueprintEditorUtils.h”
#include “UnrealEd.h”
#include “EditorStyle.h”
#include “KismetCompiler.h”
#include “BlueprintNodeSpawner.h”
#include “EditorCategoryUtils.h”
#include “BlueprintActionDatabaseRegistrar.h”
#include “SampleData.h”

#define LOCTEXT_NAMESPACE “SampleData”

struct FK2Node_CopySampleDataSettingHelper
{
	static FString ClassPinName;
	static FString TargetPinName;
	static FString SettingPinName;
};

FString FK2Node_CopySampleDataSettingHelper::ClassPinName(TEXT(“Class”));
FString FK2Node_CopySampleDataSettingHelper::TargetPinName(TEXT(“Target”));
FString FK2Node_CopySampleDataSettingHelper::SettingPinName(TEXT(“Setting”));

UK2Node_CopySampleDataSetting::UK2Node_CopySampleDataSetting(const FObjectInitializer& ObjectInitializer)
	: Super(ObjectInitializer)
{
}

void UK2Node_CopySampleDataSetting::AllocateDefaultPins()
{
	const UEdGraphSchema_K2* K2Schema = GetDefault();

	// 入力クラスによって変更されないピン情報はここに記述

	// 入力実行ピン
	CreatePin(EGPD_Input, K2Schema->PC_Exec, TEXT(“”), NULL, false, false, K2Schema->PN_Execute);

	// 出力実行ピン
	CreatePin(EGPD_Output, K2Schema->PC_Exec, TEXT(“”), NULL, false, false, K2Schema->PN_Then);

	// コピー対象クラス
	UEdGraphPin* ClassPin = CreatePin(EGPD_Input, K2Schema->PC_Class, TEXT(“”), GetClassPinBaseClass(), false, false, FK2Node_CopySampleDataSettingHelper::ClassPinName);
	SetPinToolTip(*ClassPin, LOCTEXT(“ClassPinDescription”, “Copy target class”));

	Super::AllocateDefaultPins();
}

FText UK2Node_CopySampleDataSetting::GetNodeTitle(ENodeTitleType::Type TitleType) const
{
	if (TitleType == ENodeTitleType::ListView || TitleType == ENodeTitleType::MenuTitle)
	{
		return LOCTEXT(“GetNodeTitleMenu”, “Copy Sample Data Setting”);
	}
	else if (auto SampleDataClass = GetSampleDataClass())
	{
		if (CachedNodeTitle.IsOutOfDate(this))
		{
			FFormatNamedArguments Args;
			Args.Add(TEXT(“ClassName”), SampleDataClass->GetDisplayNameText());
			CachedNodeTitle.SetCachedText(FText::Format(LOCTEXT(“GetNodeTitleFormat”, “{ ClassName } Copy the settings”), Args), this);
		}
		return CachedNodeTitle;
	}
	return LOCTEXT(“GetNodeTitleDefault”, “Copy sample data setting”);
}

void UK2Node_CopySampleDataSetting::PinDefaultValueChanged(UEdGraphPin* ChangedPin)
{

	if (ChangedPin && (ChangedPin->PinName == FName(*FK2Node_CopySampleDataSettingHelper::ClassPinName)))
	{
		OnClassPinChanged();
	}
}

FText UK2Node_CopySampleDataSetting::GetTooltipText() const
{
	return LOCTEXT(“NodeTooltip”, “Copy sample data setting”);
}

bool UK2Node_CopySampleDataSetting::IsCompatibleWithGraph(const UEdGraph* TargetGraph) const
{
	UBlueprint* Blueprint = FBlueprintEditorUtils::FindBlueprintForGraph(TargetGraph);
	return Super::IsCompatibleWithGraph(TargetGraph) && (!Blueprint || FBlueprintEditorUtils::FindUserConstructionScript(Blueprint) != TargetGraph);
	/*return false;*/
}

bool UK2Node_CopySampleDataSetting::HasExternalDependencies(TArray* OptionalOutput) const
{
	UClass* SourceClass = GetSampleDataClass();
	const UBlueprint* SourceBlueprint = GetBlueprint();
	const bool bResult = (SourceClass != NULL) && (SourceClass->ClassGeneratedBy != SourceBlueprint);
	if (bResult && OptionalOutput)
	{
		OptionalOutput->AddUnique(SourceClass);
	}
	const bool bSuperResult = Super::HasExternalDependencies(OptionalOutput);
	return bSuperResult || bResult;
	/*return false;*/
}

void UK2Node_CopySampleDataSetting::PinConnectionListChanged(UEdGraphPin* Pin)
{
	if (Pin && (Pin->PinName == FName(*FK2Node_CopySampleDataSettingHelper::ClassPinName)))
	{
		OnClassPinChanged();
	}
}

void UK2Node_CopySampleDataSetting::ReallocatePinsDuringReconstruction(TArray<UEdGraphPin*>& OldPins)
{
	AllocateDefaultPins();
	UClass* SampleDataClass = GetSampleDataClass(&OldPins);
	if (SampleDataClass != NULL)
	{
		CreatePinsForClass(SampleDataClass);
	}
}

void UK2Node_CopySampleDataSetting::GetNodeAttributes(TArray<TKeyValuePair<FString, FString>>& OutNodeAttributes) const
{
	UClass* SampleDataClass = GetSampleDataClass();
	const FString SampleDataClassStr = SampleDataClass ? SampleDataClass->GetName() : TEXT(“InvalidClass”);
	OutNodeAttributes.Add(TKeyValuePair<FString, FString>(TEXT(“Type”), TEXT(“CopySampleDataSetting”)));
	OutNodeAttributes.Add(TKeyValuePair<FString, FString>(TEXT(“Class”), GetClass()->GetName()));
	OutNodeAttributes.Add(TKeyValuePair<FString, FString>(TEXT(“Name”), GetName()));
	OutNodeAttributes.Add(TKeyValuePair<FString, FString>(TEXT(“ObjectClass”), SampleDataClassStr));
}

void UK2Node_CopySampleDataSetting::GetMenuActions(FBlueprintActionDatabaseRegistrar& ActionRegistrar) const
{
	UClass* ActionKey = GetClass();
	if (ActionRegistrar.IsOpenForRegistration(ActionKey))
	{
		UBlueprintNodeSpawner* NodeSpawner = UBlueprintNodeSpawner::Create(GetClass());
		check(NodeSpawner != nullptr);

		ActionRegistrar.AddBlueprintAction(ActionKey, NodeSpawner);
	}
}

FText UK2Node_CopySampleDataSetting::GetMenuCategory() const
{
	return LOCTEXT(“MenuCategory”, “Sample”);
}

void UK2Node_CopySampleDataSetting::ExpandNode(class FKismetCompilerContext& CompilerContext, UEdGraph* TargetGraph)
{
	Super::ExpandNode(CompilerContext, TargetGraph);

	static FName CopySettingA_FunctionName = GET_FUNCTION_NAME_CHECKED(USampleDataA, CopySettingA_Static);
	static FName CopySettingB_FunctionName = GET_FUNCTION_NAME_CHECKED(USampleDataB, CopySettingB_Static);
	static FString Class_ParamName = FString(TEXT(“Class”));
	static FString Target_ParamName = FString(TEXT(“Target”));
	static FString Setting_ParamName = FString(TEXT(“Setting”));

	UK2Node_CopySampleDataSetting* CopySampleDataSettingNode = this;
	UEdGraphPin* NodeExec = CopySampleDataSettingNode->GetExecPin();
	UEdGraphPin* ClassPin = CopySampleDataSettingNode->GetClassPin();
	UEdGraphPin* TargetPin = CopySampleDataSettingNode->GetTargetPin();
	UEdGraphPin* SettingPin = CopySampleDataSettingNode->GetSettingPin();
	UEdGraphPin* NodeThen = CopySampleDataSettingNode->GetThenPin();
	UEdGraphPin* NodeResult = CopySampleDataSettingNode->GetResultPin();

	UClass* SampleDataClass = (ClassPin != NULL) ? Cast(ClassPin->DefaultObject) : NULL;

	if ((0 == ClassPin->LinkedTo.Num()) && (NULL == SampleDataClass))
	{
		CompilerContext.MessageLog.Error(*LOCTEXT(“CopySampleDataSettingNodeMissingClass_Error”, “Class not set”).ToString(), CopySampleDataSettingNode);
		CopySampleDataSettingNode->BreakAllNodeLinks();
		return;

	}

	if (SampleDataClass != USampleDataA::StaticClass() && SampleDataClass != USampleDataB::StaticClass())
	{
		CompilerContext.MessageLog.Error(*LOCTEXT(“CopySampleDataSettingNodeMissingClass_Error”, “Invalid class”).ToString(), CopySampleDataSettingNode);
		CopySampleDataSettingNode->BreakAllNodeLinks();
		return;
	}

	//////////////////////////////////////////////////////////////////////////
	// ‘USampleData::CopySettingStatic’ を呼び出すノードを作成

	UK2Node_CallFunction* CallCopyNode = CompilerContext.SpawnIntermediateNode(CopySampleDataSettingNode, TargetGraph);

	if (SampleDataClass == USampleDataA::StaticClass())
	{
		CallCopyNode->FunctionReference.SetExternalMember(CopySettingA_FunctionName, SampleDataClass);
	}
	else if (SampleDataClass == USampleDataB::StaticClass())
	{
		CallCopyNode->FunctionReference.SetExternalMember(CopySettingB_FunctionName, SampleDataClass);
	}

	CallCopyNode->AllocateDefaultPins();

	UEdGraphPin* CallCopyExec = CallCopyNode->GetExecPin();
	UEdGraphPin* CallCopyTargetPin = CallCopyNode->FindPinChecked(Target_ParamName);
	UEdGraphPin* CallCopySettingPin = CallCopyNode->FindPinChecked(Setting_ParamName);
	UEdGraphPin* CallCopyResult = CallCopyNode->GetReturnValuePin();

	CompilerContext.MovePinLinksToIntermediate(*NodeExec, *CallCopyExec);

	if (TargetPin)
	{
		CompilerContext.MovePinLinksToIntermediate(*TargetPin, *CallCopyTargetPin);
	}

	if (SettingPin)
	{
		CompilerContext.MovePinLinksToIntermediate(*SettingPin, *CallCopySettingPin);
	}

	if (NodeResult)
	{
		CallCopyResult->PinType = NodeResult->PinType;
		CompilerContext.MovePinLinksToIntermediate(*NodeResult, *CallCopyResult);
	}

	//////////////////////////////////////////////////////////////////////////
	// 出力実行ピンに、’USampleData::CopySettingStatic’ 実行結果ピンを紐付ける

	UEdGraphPin* LastThen = FKismetCompilerUtilities::GenerateAssignmentNodes(CompilerContext, TargetGraph, CallCopyNode, CopySampleDataSettingNode, CallCopyResult, GetSampleDataClass());

	CompilerContext.MovePinLinksToIntermediate(*NodeThen, *LastThen);

	// 処理が終了したのでリンクを外す
	CopySampleDataSettingNode->BreakAllNodeLinks();
}

void UK2Node_CopySampleDataSetting::CreatePinsForClass(UClass* InClass, TArray<UEdGraphPin*>* OutClassPins)
{
	check(InClass != NULL);

	const UEdGraphSchema_K2* K2Schema = GetDefault();
	const USampleData* ClassDefaultObject = CastChecked(InClass->GetDefaultObject(false));

	// 入力クラスによって変更するピン情報はここに記述

	// コピー先インスタンス
	UEdGraphPin* TargetPin = CreatePin(EGPD_Input, K2Schema->PC_Object, TEXT(“”), InClass, false, false, FK2Node_CopySampleDataSettingHelper::TargetPinName);
	SetPinToolTip(*TargetPin, LOCTEXT(“TargetPinDescription”, “Instance before copying”));

	// 出力ピン
	UEdGraphPin* ResultPin = CreatePin(EGPD_Output, K2Schema->PC_Object, TEXT(“”), InClass, false, false, K2Schema->PN_ReturnValue);
	SetPinToolTip(*ResultPin, LOCTEXT(“ResultPinDescription”, “Instance after copying”));

	if (OutClassPins)
	{
		OutClassPins->Add(TargetPin);
		OutClassPins->Add(ResultPin);
	}

	// コピーする設定
	UClass* SettingClass = ClassDefaultObject->GetSettingClass();
	if (SettingClass)
	{
		UEdGraphPin* SettingPin = CreatePin(EGPD_Input, K2Schema->PC_Object, TEXT(“”), ClassDefaultObject->GetSettingClass(), false, false, FK2Node_CopySampleDataSettingHelper::SettingPinName);
		SetPinToolTip(*SettingPin, LOCTEXT(“SettingPinDescription”, “Settings to copy”));

		if (OutClassPins)
		{
			OutClassPins->Add(SettingPin);
		}
	}
}

UEdGraphPin* UK2Node_CopySampleDataSetting::GetClassPin(const TArray<UEdGraphPin*>* InPinsToSearch /*= NULL*/) const
{
	const TArray<UEdGraphPin*>* PinsToSearch = InPinsToSearch ? InPinsToSearch : &Pins;

	UEdGraphPin* Pin = NULL;
	for (auto PinIt = PinsToSearch->CreateConstIterator(); PinIt; ++PinIt)
	{
		UEdGraphPin* TestPin = *PinIt;
		if (TestPin && TestPin->PinName == FName(*FK2Node_CopySampleDataSettingHelper::ClassPinName))
		{
			Pin = TestPin;
			break;
		}
	}
	check(Pin == NULL || Pin->Direction == EGPD_Input);
	return Pin;
	//return nullptr;
}

UEdGraphPin* UK2Node_CopySampleDataSetting::GetTargetPin() const
{
	UEdGraphPin* Pin = FindPin(FK2Node_CopySampleDataSettingHelper::TargetPinName);
	check(Pin == NULL || Pin->Direction == EGPD_Input);
	return Pin;
	//return nullptr;
}

UEdGraphPin* UK2Node_CopySampleDataSetting::GetSettingPin() const
{
	UEdGraphPin* Pin = FindPin(FK2Node_CopySampleDataSettingHelper::SettingPinName);
	check(Pin == NULL || Pin->Direction == EGPD_Input);
	return Pin;
	//return nullptr;
}

UEdGraphPin* UK2Node_CopySampleDataSetting::GetThenPin()const
{
	const UEdGraphSchema_K2* K2Schema = GetDefault();

	UEdGraphPin* Pin = FindPinChecked(K2Schema->PN_Then);
	check(Pin->Direction == EGPD_Output);
	return Pin;
	//return nullptr;
}

UEdGraphPin* UK2Node_CopySampleDataSetting::GetResultPin() const
{
	const UEdGraphSchema_K2* K2Schema = GetDefault();

	UEdGraphPin* Pin = FindPin(K2Schema->PN_ReturnValue);
	check(Pin == NULL || Pin->Direction == EGPD_Output);
	return Pin;
	//return nullptr;
}

UClass* UK2Node_CopySampleDataSetting::GetSampleDataClass(const TArray<UEdGraphPin*>* InPinsToSearch /*=NULL*/) const
{
	UClass* SampleDataClass = NULL;
	const TArray<UEdGraphPin*>* PinsToSearch = InPinsToSearch ? InPinsToSearch : &Pins;

	UEdGraphPin* ClassPin = GetClassPin(PinsToSearch);
	if (ClassPin && ClassPin->DefaultObject != NULL && ClassPin->LinkedTo.Num() == 0)
	{
		SampleDataClass = CastChecked(ClassPin->DefaultObject);
	}
	else if (ClassPin && ClassPin->LinkedTo.Num())
	{
		auto ClassTarget = ClassPin->LinkedTo[0];
		SampleDataClass = ClassTarget ? Cast(ClassTarget->PinType.PinSubCategoryObject.Get()) : nullptr;
	}

	return SampleDataClass;
	//return nullptr;
}

UClass* UK2Node_CopySampleDataSetting::GetClassPinBaseClass() const
{
	return USampleData::StaticClass();
}

bool UK2Node_CopySampleDataSetting::IsSpawnVarPin(UEdGraphPin* Pin)
{
	const UEdGraphSchema_K2* K2Schema = GetDefault();

	return(Pin->PinName != K2Schema->PN_Execute &&
		Pin->PinName != K2Schema->PN_Then &&
		Pin->PinName != FName(*FK2Node_CopySampleDataSettingHelper::ClassPinName));
	//return false;
}

void UK2Node_CopySampleDataSetting::SetPinToolTip(UEdGraphPin& MutatablePin, const FText& PinDescription) const
{
	MutatablePin.PinToolTip = UEdGraphSchema_K2::TypeToText(MutatablePin.PinType).ToString();

	UEdGraphSchema_K2 const* const K2Schema = Cast(GetSchema());
	if (K2Schema != nullptr)
	{
		MutatablePin.PinToolTip += TEXT(” “);
		MutatablePin.PinToolTip += K2Schema->GetPinDisplayName(&MutatablePin).ToString();
	}

	MutatablePin.PinToolTip += FString(TEXT(“\n”)) + PinDescription.ToString();
}

void UK2Node_CopySampleDataSetting::OnClassPinChanged()
{
	const UEdGraphSchema_K2* K2Schema = GetDefault();

	TArray<UEdGraphPin*> OldPins = Pins;
	TArray<UEdGraphPin*> OldClassPins;

	for (int32 i = 0; i < OldPins.Num(); i++)
	{
		UEdGraphPin* OldPin = OldPins[i];
		if (IsSpawnVarPin(OldPin))
		{
			Pins.Remove(OldPin);
			OldClassPins.Add(OldPin);
		}
	}

	CachedNodeTitle.MarkDirty();

	UClass* SampleDataClass = GetSampleDataClass();
	TArray<UEdGraphPin*> NewClassPins;
	if (SampleDataClass != NULL)
	{
		CreatePinsForClass(SampleDataClass, &NewClassPins);
	}

	RewireOldPinsToNewPins(OldClassPins, NewClassPins, nullptr);

	DestroyPinList(OldClassPins);

	UEdGraph* Graph = GetGraph();
	Graph->NotifyGraphChanged();

	FBlueprintEditorUtils::MarkBlueprintAsModified(GetBlueprint());
}

#undef LOCTEXT_NAMESPACE

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// Fill out your copyright notice in the Description page of Project Settings.

#include “K2Node_CopySampleDataSetting.h”

#include “MyProjectEditor.h”

#include “GraphEditorSettings.h”

#include “BlueprintGraphDefinitions.h”

#include “BlueprintUtilities.h”

#include “Kismet2/BlueprintEditorUtils.h”

#include “UnrealEd.h”

#include “EditorStyle.h”

#include “KismetCompiler.h”

#include “BlueprintNodeSpawner.h”

#include “EditorCategoryUtils.h”

#include “BlueprintActionDatabaseRegistrar.h”

#include “SampleData.h”

#define LOCTEXT_NAMESPACE “SampleData”

struct FK2Node_CopySampleDataSettingHelper

{

static FString ClassPinName;

static FString TargetPinName;

static FString SettingPinName;

};

FString FK2Node_CopySampleDataSettingHelper::ClassPinName(TEXT(“Class”));

FString FK2Node_CopySampleDataSettingHelper::TargetPinName(TEXT(“Target”));

FString FK2Node_CopySampleDataSettingHelper::SettingPinName(TEXT(“Setting”));

UK2Node_CopySampleDataSetting::UK2Node_CopySampleDataSetting(const FObjectInitializer& ObjectInitializer)

: Super(ObjectInitializer)

{

}

void UK2Node_CopySampleDataSetting::AllocateDefaultPins()

{

const UEdGraphSchema_K2* K2Schema = GetDefault();

// 入力クラスによって変更されないピン情報はここに記述

// 入力実行ピン

CreatePin(EGPD_Input, K2Schema->PC_Exec, TEXT(“”), NULL, false, false, K2Schema->PN_Execute);

// 出力実行ピン

CreatePin(EGPD_Output, K2Schema->PC_Exec, TEXT(“”), NULL, false, false, K2Schema->PN_Then);

// コピー対象クラス

UEdGraphPin* ClassPin = CreatePin(EGPD_Input, K2Schema->PC_Class, TEXT(“”), GetClassPinBaseClass(), false, false, FK2Node_CopySampleDataSettingHelper::ClassPinName);

SetPinToolTip(*ClassPin, LOCTEXT(“ClassPinDescription”, “Copy target class”));

Super::AllocateDefaultPins();

}

FText UK2Node_CopySampleDataSetting::GetNodeTitle(ENodeTitleType::Type TitleType) const

{

if (TitleType == ENodeTitleType::ListView || TitleType == ENodeTitleType::MenuTitle)

{

return LOCTEXT(“GetNodeTitleMenu”, “Copy Sample Data Setting”);

}

else if (auto SampleDataClass = GetSampleDataClass())

{

if (CachedNodeTitle.IsOutOfDate(this))

{

FFormatNamedArguments Args;

Args.Add(TEXT(“ClassName”), SampleDataClass->GetDisplayNameText());

CachedNodeTitle.SetCachedText(FText::Format(LOCTEXT(“GetNodeTitleFormat”, “{ ClassName } Copy the settings”), Args), this);

}

return CachedNodeTitle;

}

return LOCTEXT(“GetNodeTitleDefault”, “Copy sample data setting”);

}

void UK2Node_CopySampleDataSetting::PinDefaultValueChanged(UEdGraphPin* ChangedPin)

{

if (ChangedPin && (ChangedPin->PinName == FName(*FK2Node_CopySampleDataSettingHelper::ClassPinName)))

{

OnClassPinChanged();

}

FText UK2Node_CopySampleDataSetting::GetTooltipText() const

{

return LOCTEXT(“NodeTooltip”, “Copy sample data setting”);

}

bool UK2Node_CopySampleDataSetting::IsCompatibleWithGraph(const UEdGraph* TargetGraph) const

{

UBlueprint* Blueprint = FBlueprintEditorUtils::FindBlueprintForGraph(TargetGraph);

return Super::IsCompatibleWithGraph(TargetGraph) && (!Blueprint || FBlueprintEditorUtils::FindUserConstructionScript(Blueprint) != TargetGraph);

/*return false;*/

}

bool UK2Node_CopySampleDataSetting::HasExternalDependencies(TArray* OptionalOutput) const

{

UClass* SourceClass = GetSampleDataClass();

const UBlueprint* SourceBlueprint = GetBlueprint();

const bool bResult = (SourceClass != NULL) && (SourceClass->ClassGeneratedBy != SourceBlueprint);

if (bResult && OptionalOutput)

{

OptionalOutput->AddUnique(SourceClass);

}

const bool bSuperResult = Super::HasExternalDependencies(OptionalOutput);

return bSuperResult || bResult;

/*return false;*/

}

void UK2Node_CopySampleDataSetting::PinConnectionListChanged(UEdGraphPin* Pin)

{

if (Pin && (Pin->PinName == FName(*FK2Node_CopySampleDataSettingHelper::ClassPinName)))

{

OnClassPinChanged();

}

void UK2Node_CopySampleDataSetting::ReallocatePinsDuringReconstruction(TArray<UEdGraphPin*>& OldPins)

{

AllocateDefaultPins();

UClass* SampleDataClass = GetSampleDataClass(&OldPins);

if (SampleDataClass != NULL)

{

CreatePinsForClass(SampleDataClass);

}

void UK2Node_CopySampleDataSetting::GetNodeAttributes(TArray<TKeyValuePair<FString, FString>>& OutNodeAttributes) const

{

UClass* SampleDataClass = GetSampleDataClass();

const FString SampleDataClassStr = SampleDataClass ? SampleDataClass->GetName() : TEXT(“InvalidClass”);

OutNodeAttributes.Add(TKeyValuePair<FString, FString>(TEXT(“Type”), TEXT(“CopySampleDataSetting”)));

OutNodeAttributes.Add(TKeyValuePair<FString, FString>(TEXT(“Class”), GetClass()->GetName()));

OutNodeAttributes.Add(TKeyValuePair<FString, FString>(TEXT(“Name”), GetName()));

OutNodeAttributes.Add(TKeyValuePair<FString, FString>(TEXT(“ObjectClass”), SampleDataClassStr));

}

void UK2Node_CopySampleDataSetting::GetMenuActions(FBlueprintActionDatabaseRegistrar& ActionRegistrar) const

{

UClass* ActionKey = GetClass();

if (ActionRegistrar.IsOpenForRegistration(ActionKey))

{

UBlueprintNodeSpawner* NodeSpawner = UBlueprintNodeSpawner::Create(GetClass());

check(NodeSpawner != nullptr);

ActionRegistrar.AddBlueprintAction(ActionKey, NodeSpawner);

}

FText UK2Node_CopySampleDataSetting::GetMenuCategory() const

{

return LOCTEXT(“MenuCategory”, “Sample”);

}

void UK2Node_CopySampleDataSetting::ExpandNode(class FKismetCompilerContext& CompilerContext, UEdGraph* TargetGraph)

{

Super::ExpandNode(CompilerContext, TargetGraph);

static FName CopySettingA_FunctionName = GET_FUNCTION_NAME_CHECKED(USampleDataA, CopySettingA_Static);

static FName CopySettingB_FunctionName = GET_FUNCTION_NAME_CHECKED(USampleDataB, CopySettingB_Static);

static FString Class_ParamName = FString(TEXT(“Class”));

static FString Target_ParamName = FString(TEXT(“Target”));

static FString Setting_ParamName = FString(TEXT(“Setting”));

UK2Node_CopySampleDataSetting* CopySampleDataSettingNode = this;

UEdGraphPin* NodeExec = CopySampleDataSettingNode->GetExecPin();

UEdGraphPin* ClassPin = CopySampleDataSettingNode->GetClassPin();

UEdGraphPin* TargetPin = CopySampleDataSettingNode->GetTargetPin();

UEdGraphPin* SettingPin = CopySampleDataSettingNode->GetSettingPin();

UEdGraphPin* NodeThen = CopySampleDataSettingNode->GetThenPin();

UEdGraphPin* NodeResult = CopySampleDataSettingNode->GetResultPin();

UClass* SampleDataClass = (ClassPin != NULL) ? Cast(ClassPin->DefaultObject) : NULL;

if ((0 == ClassPin->LinkedTo.Num()) && (NULL == SampleDataClass))

{

CompilerContext.MessageLog.Error(*LOCTEXT(“CopySampleDataSettingNodeMissingClass_Error”, “Class not set”).ToString(), CopySampleDataSettingNode);

CopySampleDataSettingNode->BreakAllNodeLinks();

return;

}

if (SampleDataClass != USampleDataA::StaticClass() && SampleDataClass != USampleDataB::StaticClass())

{

CompilerContext.MessageLog.Error(*LOCTEXT(“CopySampleDataSettingNodeMissingClass_Error”, “Invalid class”).ToString(), CopySampleDataSettingNode);

CopySampleDataSettingNode->BreakAllNodeLinks();

return;

}

//////////////////////////////////////////////////////////////////////////

// ‘USampleData::CopySettingStatic’ を呼び出すノードを作成

UK2Node_CallFunction* CallCopyNode = CompilerContext.SpawnIntermediateNode(CopySampleDataSettingNode, TargetGraph);

if (SampleDataClass == USampleDataA::StaticClass())

{

CallCopyNode->FunctionReference.SetExternalMember(CopySettingA_FunctionName, SampleDataClass);

}

else if (SampleDataClass == USampleDataB::StaticClass())

{

CallCopyNode->FunctionReference.SetExternalMember(CopySettingB_FunctionName, SampleDataClass);

}

CallCopyNode->AllocateDefaultPins();

UEdGraphPin* CallCopyExec = CallCopyNode->GetExecPin();

UEdGraphPin* CallCopyTargetPin = CallCopyNode->FindPinChecked(Target_ParamName);

UEdGraphPin* CallCopySettingPin = CallCopyNode->FindPinChecked(Setting_ParamName);

UEdGraphPin* CallCopyResult = CallCopyNode->GetReturnValuePin();

CompilerContext.MovePinLinksToIntermediate(*NodeExec, *CallCopyExec);

if (TargetPin)

{

CompilerContext.MovePinLinksToIntermediate(*TargetPin, *CallCopyTargetPin);

}

if (SettingPin)

{

CompilerContext.MovePinLinksToIntermediate(*SettingPin, *CallCopySettingPin);

}

if (NodeResult)

{

CallCopyResult->PinType = NodeResult->PinType;

CompilerContext.MovePinLinksToIntermediate(*NodeResult, *CallCopyResult);

}

//////////////////////////////////////////////////////////////////////////

// 出力実行ピンに、’USampleData::CopySettingStatic’ 実行結果ピンを紐付ける

UEdGraphPin* LastThen = FKismetCompilerUtilities::GenerateAssignmentNodes(CompilerContext, TargetGraph, CallCopyNode, CopySampleDataSettingNode, CallCopyResult, GetSampleDataClass());

CompilerContext.MovePinLinksToIntermediate(*NodeThen, *LastThen);

// 処理が終了したのでリンクを外す

CopySampleDataSettingNode->BreakAllNodeLinks();

}

void UK2Node_CopySampleDataSetting::CreatePinsForClass(UClass* InClass, TArray<UEdGraphPin*>* OutClassPins)

{

check(InClass != NULL);

const UEdGraphSchema_K2* K2Schema = GetDefault();

const USampleData* ClassDefaultObject = CastChecked(InClass->GetDefaultObject(false));

// 入力クラスによって変更するピン情報はここに記述

// コピー先インスタンス

UEdGraphPin* TargetPin = CreatePin(EGPD_Input, K2Schema->PC_Object, TEXT(“”), InClass, false, false, FK2Node_CopySampleDataSettingHelper::TargetPinName);

SetPinToolTip(*TargetPin, LOCTEXT(“TargetPinDescription”, “Instance before copying”));

// 出力ピン

UEdGraphPin* ResultPin = CreatePin(EGPD_Output, K2Schema->PC_Object, TEXT(“”), InClass, false, false, K2Schema->PN_ReturnValue);

SetPinToolTip(*ResultPin, LOCTEXT(“ResultPinDescription”, “Instance after copying”));

if (OutClassPins)

{

OutClassPins->Add(TargetPin);

OutClassPins->Add(ResultPin);

}

// コピーする設定

UClass* SettingClass = ClassDefaultObject->GetSettingClass();

if (SettingClass)

{

UEdGraphPin* SettingPin = CreatePin(EGPD_Input, K2Schema->PC_Object, TEXT(“”), ClassDefaultObject->GetSettingClass(), false, false, FK2Node_CopySampleDataSettingHelper::SettingPinName);

SetPinToolTip(*SettingPin, LOCTEXT(“SettingPinDescription”, “Settings to copy”));

if (OutClassPins)

{

OutClassPins->Add(SettingPin);

}

UEdGraphPin* UK2Node_CopySampleDataSetting::GetClassPin(const TArray<UEdGraphPin*>* InPinsToSearch /*= NULL*/) const

{

const TArray<UEdGraphPin*>* PinsToSearch = InPinsToSearch ? InPinsToSearch : &Pins;

UEdGraphPin* Pin = NULL;

for (auto PinIt = PinsToSearch->CreateConstIterator(); PinIt; ++PinIt)

{

UEdGraphPin* TestPin = *PinIt;

if (TestPin && TestPin->PinName == FName(*FK2Node_CopySampleDataSettingHelper::ClassPinName))

{

Pin = TestPin;

break;

}

check(Pin == NULL || Pin->Direction == EGPD_Input);

return Pin;

//return nullptr;

}

UEdGraphPin* UK2Node_CopySampleDataSetting::GetTargetPin() const

{

UEdGraphPin* Pin = FindPin(FK2Node_CopySampleDataSettingHelper::TargetPinName);

check(Pin == NULL || Pin->Direction == EGPD_Input);

return Pin;

//return nullptr;

}

UEdGraphPin* UK2Node_CopySampleDataSetting::GetSettingPin() const

{

UEdGraphPin* Pin = FindPin(FK2Node_CopySampleDataSettingHelper::SettingPinName);

check(Pin == NULL || Pin->Direction == EGPD_Input);

return Pin;

//return nullptr;

}

UEdGraphPin* UK2Node_CopySampleDataSetting::GetThenPin()const

{

const UEdGraphSchema_K2* K2Schema = GetDefault();

UEdGraphPin* Pin = FindPinChecked(K2Schema->PN_Then);

check(Pin->Direction == EGPD_Output);

return Pin;

//return nullptr;

}

UEdGraphPin* UK2Node_CopySampleDataSetting::GetResultPin() const

{

const UEdGraphSchema_K2* K2Schema = GetDefault();

UEdGraphPin* Pin = FindPin(K2Schema->PN_ReturnValue);

check(Pin == NULL || Pin->Direction == EGPD_Output);

return Pin;

//return nullptr;

}

UClass* UK2Node_CopySampleDataSetting::GetSampleDataClass(const TArray<UEdGraphPin*>* InPinsToSearch /*=NULL*/) const

{

UClass* SampleDataClass = NULL;

const TArray<UEdGraphPin*>* PinsToSearch = InPinsToSearch ? InPinsToSearch : &Pins;

UEdGraphPin* ClassPin = GetClassPin(PinsToSearch);

if (ClassPin && ClassPin->DefaultObject != NULL && ClassPin->LinkedTo.Num() == 0)

{

SampleDataClass = CastChecked(ClassPin->DefaultObject);

}

else if (ClassPin && ClassPin->LinkedTo.Num())

{

auto ClassTarget = ClassPin->LinkedTo[0];

SampleDataClass = ClassTarget ? Cast(ClassTarget->PinType.PinSubCategoryObject.Get()) : nullptr;

}

return SampleDataClass;

//return nullptr;

}

UClass* UK2Node_CopySampleDataSetting::GetClassPinBaseClass() const

{

return USampleData::StaticClass();

}

bool UK2Node_CopySampleDataSetting::IsSpawnVarPin(UEdGraphPin* Pin)

{

const UEdGraphSchema_K2* K2Schema = GetDefault();

return(Pin->PinName != K2Schema->PN_Execute &&

Pin->PinName != K2Schema->PN_Then &&

Pin->PinName != FName(*FK2Node_CopySampleDataSettingHelper::ClassPinName));

//return false;

}

void UK2Node_CopySampleDataSetting::SetPinToolTip(UEdGraphPin& MutatablePin, const FText& PinDescription) const

{

MutatablePin.PinToolTip = UEdGraphSchema_K2::TypeToText(MutatablePin.PinType).ToString();

UEdGraphSchema_K2 const* const K2Schema = Cast(GetSchema());

if (K2Schema != nullptr)

{

MutatablePin.PinToolTip += TEXT(” “);

MutatablePin.PinToolTip += K2Schema->GetPinDisplayName(&MutatablePin).ToString();

}

MutatablePin.PinToolTip += FString(TEXT(“\n”)) + PinDescription.ToString();

}

void UK2Node_CopySampleDataSetting::OnClassPinChanged()

{

const UEdGraphSchema_K2* K2Schema = GetDefault();

TArray<UEdGraphPin*> OldPins = Pins;

TArray<UEdGraphPin*> OldClassPins;

for (int32 i = 0; i < OldPins.Num(); i++)

{

UEdGraphPin* OldPin = OldPins[i];

if (IsSpawnVarPin(OldPin))

{

Pins.Remove(OldPin);

OldClassPins.Add(OldPin);

}

CachedNodeTitle.MarkDirty();

UClass* SampleDataClass = GetSampleDataClass();

TArray<UEdGraphPin*> NewClassPins;

if (SampleDataClass != NULL)

{

CreatePinsForClass(SampleDataClass, &NewClassPins);

}

RewireOldPinsToNewPins(OldClassPins, NewClassPins, nullptr);

DestroyPinList(OldClassPins);

UEdGraph* Graph = GetGraph();

Graph->NotifyGraphChanged();

FBlueprintEditorUtils::MarkBlueprintAsModified(GetBlueprint());

}

#undef LOCTEXT_NAMESPACE

こちらはエディタ時のみに使用するクラスになるので、プロジェクトのエディタモジュール側に定義します。
ちなみにエディタモジュールの実装に関してはコチラの記事を参考にして下さい。

また、カスタムノードを実装時には以下のように参照するモジュールを追加してあげる必要もありますのでご注意ください。

// Fill out your copyright notice in the Description page of Project Settings.
using UnrealBuildTool;

public class MyProjectEditor : ModuleRules
{
	public MyProjectEditor(ReadOnlyTargetRules Target) : base(Target)
	{
		PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;

		PublicDependencyModuleNames.AddRange(new string[]{
		“Core”,
		“CoreUObject”,
		“Engine”,
		“InputCore”,
		“Slate”,
		“EditorStyle”,
		“MyProject”
			});

		PrivateDependencyModuleNames.AddRange(new string[]{
		“EditorStyle”,
		“KismetCompiler”,
		“UnrealEd”,
		“GraphEditor”,
		“SlateCore”,
		“Kismet”,
		“KismetWidgets”,
		“PropertyEditor”,
		“BlueprintGraph”
			});
	}
}

// Fill out your copyright notice in the Description page of Project Settings.

using UnrealBuildTool;

public class MyProjectEditor : ModuleRules

{

public MyProjectEditor(ReadOnlyTargetRules Target) : base(Target)

{

PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;

PublicDependencyModuleNames.AddRange(new string[]{

“Core”,

“CoreUObject”,

“Engine”,

“InputCore”,

“Slate”,

“EditorStyle”,

“MyProject”

});

PrivateDependencyModuleNames.AddRange(new string[]{

“EditorStyle”,

“KismetCompiler”,

“UnrealEd”,

“GraphEditor”,

“SlateCore”,

“Kismet”,

“KismetWidgets”,

“PropertyEditor”,

“BlueprintGraph”

});

}

自作プラグインでの拡張事例

自分が個人で作成・公開している WebApi プラグインというものがあります。
プラグインの内容は割愛しますが、こちらの実装でも今回の仕組みが活用されています。

WebApi クラスをインスタンス化する機能を提供する「Create WebApi」というノードがあります。
こちらは ConstructObjectFromClass とほぼ同機能のノードとなりますが、それに加えて以下の拡張が入っています。

入力ピンのクラス指定候補に WebApi クラス or それを継承したものしか出てこない
出力ピンのデフォルト型が WebApi クラスのリファレンスとなっている
（動的に入力ピンのクラス指定が変わるような実装でも、WebApi クラスのAPIはキャストせずに使用できる）

また、WebApiRequestBodyBase クラスをインスタンス化し、更にプロパティコピー元のインスタンスを指定が可能な「Create WebApiRequestBody」というノードも実装されています。

こういった感じに入力ピンは自由に増やすことが可能です。

[UE4] ノードの入力ピンによって出力ピン等の内容を動的に変える仕組みについて ～実装例編～

実装サンプル

自作プラグインでの拡張事例

関連ブログ

[UE4] ノードの入力ピンによって出力ピン等の内容を動的に変える仕組みについて～実装例編～