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63 lines
2.1 KiB
C++
63 lines
2.1 KiB
C++
// Copyright 1998-2017 Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "CoreMinimal.h"
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#include "UObject/ObjectMacros.h"
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#include "UObject/Object.h"
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#include "Templates/SubclassOf.h"
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#include "EdGraph/EdGraphNode.h"
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#include "BlueprintNodeSignature.h"
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#include "BlueprintNodeBinder.h"
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#include "BlueprintNodeSpawner.h"
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#include "BlueprintBoundNodeSpawner.generated.h"
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class UBlueprint;
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class UEdGraph;
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/**
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* Takes care of spawning various bound nodes. Acts as the
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* "action" portion of certain FBlueprintActionMenuItems.
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*/
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UCLASS(Transient)
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class BLUEPRINTGRAPH_API UBlueprintBoundNodeSpawner : public UBlueprintNodeSpawner
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{
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GENERATED_UCLASS_BODY()
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DECLARE_DELEGATE_RetVal_OneParam(bool, FCanBindObjectDelegate, UObject const*);
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DECLARE_DELEGATE_RetVal_TwoParams(bool, FOnBindObjectDelegate, UEdGraphNode*, UObject*);
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DECLARE_DELEGATE_RetVal_TwoParams(UEdGraphNode*, FFindPreExistingNodeDelegate, const UBlueprint*, IBlueprintNodeBinder::FBindingSet const& );
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public:
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/**
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* @return A newly allocated instance of this class.
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*/
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static UBlueprintBoundNodeSpawner* Create(TSubclassOf<UEdGraphNode> NodeClass, UObject* Outer = nullptr);
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// UBlueprintNodeSpawner interface
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virtual FBlueprintNodeSignature GetSpawnerSignature() const override;
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virtual UEdGraphNode* Invoke(UEdGraph* ParentGraph, FBindingSet const& Bindings, FVector2D const Location) const override;
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// End UBlueprintNodeSpawner interface
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// FBlueprintNodeBinder interface
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virtual bool IsBindingCompatible(UObject const* BindingCandidate) const override;
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virtual bool BindToNode(UEdGraphNode* Node, UObject* Binding) const override;
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// End FBlueprintNodeBinder interface
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public:
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/**
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* A delegate to perform specialized node binding verification
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*/
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FCanBindObjectDelegate CanBindObjectDelegate;
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/**
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* A delegate to perform specialized node setup during binding
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*/
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FOnBindObjectDelegate OnBindObjectDelegate;
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/**
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* A delegate to find a node that is already spawned, instead of spawning a node
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* we will focus on the pre-existing node found by the delegate
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*/
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FFindPreExistingNodeDelegate FindPreExistingNodeDelegate;
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};
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