UnrealEngineUWP/Engine/Source/Editor/BlueprintGraph/Private/K2Node_InputVectorAxisEvent.cpp

// Copyright 1998-2015 Epic Games, Inc. All Rights Reserved.

#include "BlueprintGraphPrivatePCH.h"
#include "K2Node_InputVectorAxisEvent.h"
#include "CompilerResultsLog.h"
#include "BlueprintNodeSpawner.h"
#include "Engine/InputVectorAxisDelegateBinding.h"
#include "BlueprintActionDatabaseRegistrar.h"

UK2Node_InputVectorAxisEvent::UK2Node_InputVectorAxisEvent(const FObjectInitializer& ObjectInitializer)
: Super(ObjectInitializer)
{
	EventReference.SetExternalDelegateMember(FName(TEXT("InputAxisHandlerDynamicSignature__DelegateSignature")));
}

void UK2Node_InputVectorAxisEvent::Serialize(FArchive& Ar)
{
	Super::Serialize(Ar);

	if(Ar.IsLoading())
	{
		if(Ar.UE4Ver() < VER_UE4_K2NODE_EVENT_MEMBER_REFERENCE && EventSignatureName_DEPRECATED.IsNone() && EventSignatureClass_DEPRECATED == nullptr)
		{
			EventReference.SetExternalDelegateMember(FName(TEXT("InputAxisHandlerDynamicSignature__DelegateSignature")));
		}
	}
}

void UK2Node_InputVectorAxisEvent::ValidateNodeDuringCompilation(class FCompilerResultsLog& MessageLog) const
{
	// Skip AxisKeyEvent validation
	UK2Node_Event::ValidateNodeDuringCompilation(MessageLog);

	if (!AxisKey.IsValid())
	{
		MessageLog.Warning(*FText::Format(NSLOCTEXT("KismetCompiler", "Invalid_InputVectorAxis_Warning", "InputVectorAxis Event specifies invalid FKey'{0}' for @@"), FText::FromString(AxisKey.ToString())).ToString(), this);
	}
	else if (!AxisKey.IsVectorAxis())
	{
		MessageLog.Warning(*FText::Format(NSLOCTEXT("KismetCompiler", "NotAxis_InputVectorAxis_Warning", "InputVectorAxis Event specifies FKey'{0}' which is not a vector axis for @@"), FText::FromString(AxisKey.ToString())).ToString(), this);
	}
	else if (!AxisKey.IsBindableInBlueprints())
	{
		MessageLog.Warning(*FText::Format(NSLOCTEXT("KismetCompiler", "NotBindable_InputVectorAxis_Warning", "InputVectorAxis Event specifies FKey'{0}' that is not blueprint bindable for @@"), FText::FromString(AxisKey.ToString())).ToString(), this);
	}
}

UClass* UK2Node_InputVectorAxisEvent::GetDynamicBindingClass() const
{
	return UInputVectorAxisDelegateBinding::StaticClass();
}

void UK2Node_InputVectorAxisEvent::RegisterDynamicBinding(UDynamicBlueprintBinding* BindingObject) const
{
	UInputVectorAxisDelegateBinding* InputVectorAxisBindingObject = CastChecked<UInputVectorAxisDelegateBinding>(BindingObject);

	FBlueprintInputAxisKeyDelegateBinding Binding;
	Binding.AxisKey = AxisKey;
	Binding.bConsumeInput = bConsumeInput;
	Binding.bExecuteWhenPaused = bExecuteWhenPaused;
	Binding.bOverrideParentBinding = bOverrideParentBinding;
	Binding.FunctionNameToBind = CustomFunctionName;

	InputVectorAxisBindingObject->InputAxisKeyDelegateBindings.Add(Binding);
}

void UK2Node_InputVectorAxisEvent::GetMenuActions(FBlueprintActionDatabaseRegistrar& ActionRegistrar) const
{
	TArray<FKey> AllKeys;
	EKeys::GetAllKeys(AllKeys);

	auto CustomizeInputNodeLambda = [](UEdGraphNode* NewNode, bool bIsTemplateNode, FKey Key)
	{
		UK2Node_InputAxisKeyEvent* InputNode = CastChecked<UK2Node_InputAxisKeyEvent>(NewNode);
		InputNode->Initialize(Key);
	};

	// actions get registered under specific object-keys; the idea is that 
	// actions might have to be updated (or deleted) if their object-key is  
	// mutated (or removed)... here we use the node's class (so if the node 
	// type disappears, then the action should go with it)
	UClass* ActionKey = GetClass();
	
	for (FKey const Key : AllKeys)
	{
		if (!Key.IsBindableInBlueprints() || !Key.IsVectorAxis())
		{
			continue;
		}

		// to keep from needlessly instantiating a UBlueprintNodeSpawner, first   
		// check to make sure that the registrar is looking for actions of this type
		// (could be regenerating actions for a specific asset, and therefore the 
		// registrar would only accept actions corresponding to that asset)
		if (!ActionRegistrar.IsOpenForRegistration(ActionKey))
		{
			continue;
		}
		
		UBlueprintNodeSpawner* NodeSpawner = UBlueprintNodeSpawner::Create(GetClass());
		check(NodeSpawner != nullptr);
		
		NodeSpawner->CustomizeNodeDelegate = UBlueprintNodeSpawner::FCustomizeNodeDelegate::CreateStatic(CustomizeInputNodeLambda, Key);
		ActionRegistrar.AddBlueprintAction(ActionKey, NodeSpawner);
	}
}