UnrealEngineUWP/Engine/Plugins/Runtime/ModelViewViewModel/Source/ModelViewViewModelBlueprint/Private/MVVMConversionFunctionGraphSchema.cpp

// Copyright Epic Games, Inc. All Rights Reserved.


#include "MVVMConversionFunctionGraphSchema.h"
#include "Bindings/MVVMConversionFunctionHelper.h"
#include "EdGraph/EdGraphNode.h"
#include "EdGraph/EdGraphPin.h"


bool UMVVMConversionFunctionGraphSchema::TryCreateConnection(UEdGraphPin* A, UEdGraphPin* B) const
{
	bool bResult = Super::TryCreateConnection(A, B);

	if (bResult && !A->LinkedTo.Contains(B))
	{
		// ConversionNode or Promotion node was created between the 2 graph pins
		if (A->LinkedTo.Num() == 1)
		{
			if (UEdGraphNode* AutogeneratedNode = A->LinkedTo[0]->GetOwningNode())
			{
				for (UEdGraphPin* AutogeneratedPin : AutogeneratedNode->Pins)
				{
					if (AutogeneratedPin->LinkedTo.Contains(B))
					{
						UE::MVVM::ConversionFunctionHelper::MarkNodeAsAutoPromote(AutogeneratedNode);
						break;
					}
				}
			}
		}
	}
	return bResult;
}

const FPinConnectionResponse UMVVMConversionFunctionGraphSchema::CanCreateConnection(const UEdGraphPin* PinA, const UEdGraphPin* PinB) const
{
	check(PinA);
	check(PinB);
	if (PinA->PinType.PinCategory == UEdGraphSchema_K2::PC_SoftObject && PinB->PinType.PinCategory == UEdGraphSchema_K2::PC_Object)
	{
		FPinConnectionResponse Response(CONNECT_RESPONSE_DISALLOW, FString::Printf(TEXT("Conversion disallowed from %s to %s"), *UEdGraphSchema_K2::PC_SoftObject.ToString(), *UEdGraphSchema_K2::PC_Object.ToString()));
		Response.SetFatal();
		return Response;
	}

	return Super::CanCreateConnection(PinA, PinB);
}

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

EGraphType UMVVMFakeTestUbergraphSchema::GetGraphType(const UEdGraph* TestEdGraph) const
{
	return EGraphType::GT_Ubergraph;
}

UMVVMFakeTestUbergraph::UMVVMFakeTestUbergraph()
{
	Schema = UMVVMFakeTestUbergraphSchema::StaticClass();
}

UMVVMFakeTestFunctiongraph::UMVVMFakeTestFunctiongraph()
{
	Schema = UMVVMConversionFunctionGraphSchema::StaticClass();
}