60 lines
2.0 KiB
C++
60 lines
2.0 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "InteractiveGizmoBuilder.h"
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#include "Templates/Function.h"
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#include "Templates/SubclassOf.h"
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#include "GizmoUtil.generated.h"
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class FString;
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class UInteractiveGizmo;
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class UInteractiveGizmoManager;
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/**
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* Gizmo builder that simply calls a particular lambda when building a gizmo. Makes it easy to
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* register gizmo build behavior without writing a new class.
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*/
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UCLASS(MinimalAPI)
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class USimpleLambdaInteractiveGizmoBuilder : public UInteractiveGizmoBuilder
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{
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GENERATED_BODY()
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public:
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virtual UInteractiveGizmo* BuildGizmo(const FToolBuilderState& SceneState) const override
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{
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if (BuilderFunc)
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{
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return BuilderFunc(SceneState);
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}
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return nullptr;
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}
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TUniqueFunction<UInteractiveGizmo* (const FToolBuilderState& SceneState)> BuilderFunc;
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};
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namespace UE::GizmoUtil
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{
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/**
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* Uses the gizmo manager to create a gizmo of the given class (assuming that the gizmo type does not need
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* any special setup beyond instantiation) without having to register a custom builder for that class ahead of time.
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*
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* This function lets the user bypass the need to define, register, and use a builder class, while still registering
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* the gizmo properly with the gizmo manager. Under the hood, it creates and registers a temporary generic builder,
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* uses it to make the gizmo, and then immediately deregisters the builder.
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*/
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INTERACTIVETOOLSFRAMEWORK_API UInteractiveGizmo* CreateGizmoViaSimpleBuilder(UInteractiveGizmoManager* GizmoManager,
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TSubclassOf<UInteractiveGizmo> GizmoClass, const FString& InstanceIdentifier, void* Owner);
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/**
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* Template version of CreateGizmoViaSimpleBuilder that does a cast on return.
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*/
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template <typename GizmoClass>
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GizmoClass* CreateGizmoViaSimpleBuilder(UInteractiveGizmoManager* GizmoManager,
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const FString& InstanceIdentifier, void* GizmoOwner)
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{
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return Cast<GizmoClass>(CreateGizmoViaSimpleBuilder(GizmoManager, GizmoClass::StaticClass(), InstanceIdentifier, GizmoOwner));
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}
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} |