make the senseglove settings a singleton with engine subsystem lifetime and fix the blueprint accessors

Source/SenseGloveSettings/Private/SGSettings/SGSettings.cpp

@@ -35,6 +35,10 @@
 
 #include "SGSettings/SGSettings.h"
 
+#include "Engine/Engine.h"
+
+#include "SGLog/SGLog.h"
+
 struct USGSettings::FImpl
 {
     /************************
@@ -66,11 +70,44 @@ struct USGSettings::FImpl
      ************************/
 };
 
-USGSettings::USGSettings(const FObjectInitializer& ObjectInitializer)
-    : Super(ObjectInitializer),
-      Pimpl(TUniquePtr<FImpl, FImplDeleter>(new FImpl{this}, PimplDeleter))
+USGSettings* USGSettings::GetInstance()
 {
+    USGSettings* Instance{GEngine->GetEngineSubsystem<USGSettings>()};
+    return Instance;
+}
+
+void USGSettings::FImplDeleter::operator()(const FImpl* P) const
+{
+    delete P;
+}
+
+bool USGSettings::ShouldCreateSubsystem(UObject* Outer) const
+{
+    return true;
+}
+
+void USGSettings::Initialize(FSubsystemCollectionBase& Collection)
+{
+    SGLOG("Initializing the SenseGlove settings singleton with the engine lifetime...");
+
+    Super::Initialize(Collection);
+
+    Pimpl = TUniquePtr<FImpl, FImplDeleter>(new FImpl{this}, PimplDeleter);
+
     HardwareOffset = ESGPositionalTrackingHardware::None;
+
+    SGLOG("The SenseGlove settings singleton has been successfully initialized with the engine lifetime!");
+}
+
+void USGSettings::Deinitialize()
+{
+    SGLOG("De-initializing the SenseGlove settings singleton due to the engine lifetime expiration...");
+
+    Super::Deinitialize();
+
+    Pimpl.Release();
+
+    SGLOG("The SenseGlove settings singleton has been successfully de-initialized!");
 }
 
 USGSettings::FImpl::FImpl(USGSettings* InOwner)
@@ -79,8 +116,3 @@ USGSettings::FImpl::FImpl(USGSettings* InOwner)
 }
 
 USGSettings::FImpl::~FImpl() = default;
-
-void USGSettings::FImplDeleter::operator()(const FImpl* P) const
-{
-    delete P;
-}

Source/SenseGloveSettings/Public/SGSettings/SGSettings.h

@@ -35,8 +35,8 @@
 
 #pragma once
 
+#include "Subsystems/EngineSubsystem.h"
 #include "Templates/UniquePtr.h"
-#include "UObject/Object.h"
 #include "UObject/ObjectMacros.h"
 
 #include "SGTypes/SGCoreTypes.h"
@@ -44,9 +44,12 @@
 #include "SGSettings.generated.h"
 
 UCLASS(config = SenseGloveSettings)
-class SENSEGLOVESETTINGS_API USGSettings : public UObject
+class SENSEGLOVESETTINGS_API USGSettings : public UEngineSubsystem
 {
-    GENERATED_UCLASS_BODY()
+    GENERATED_BODY()
+
+public:
+    static USGSettings* GetInstance();
 
 private:
     struct FImpl;
@@ -73,4 +76,10 @@ public:
     {
         HardwareOffset = InHardWareOffset;
     }
+
+public:
+    virtual bool ShouldCreateSubsystem(UObject* Outer) const override;
+
+    virtual void Initialize(FSubsystemCollectionBase& Collection) override;
+    virtual void Deinitialize() override;
 };

Source/SenseGloveSettings/SenseGloveSettings.Build.cs

@@ -53,6 +53,7 @@ public class SenseGloveSettings : ModuleRules
             new string[]
             {
                 "CoreUObject",
+                "Engine",
                 "SenseGloveLog",
                 "SenseGloveTypes",
             }

Source/SenseGloveSettingsKismet/Private/SGSettingsKismet/SGSettingsKismetLibrary.cpp

@@ -37,6 +37,11 @@
 
 #include "SGSettings/SGSettings.h"
 
+USGSettings* USGSettingsKismetLibrary::GetInstance()
+{
+    return USGSettings::GetInstance();
+}
+
 ESGPositionalTrackingHardware USGSettingsKismetLibrary::GetHardwareOffset(const USGSettings* Settings)
 {
     return Settings->GetHardwareOffset();

Source/SenseGloveSettingsKismet/Public/SGSettingsKismet/SGSettingsKismetLibrary.h

@@ -48,10 +48,12 @@ class SENSEGLOVESETTINGSKISMET_API USGSettingsKismetLibrary final : public USGBl
     GENERATED_BODY()
 
 public:
+    UFUNCTION(BlueprintCallable, Category="SenseGlove | Settings")
+    static USGSettings* GetInstance();
+
     UFUNCTION(BlueprintPure, Category="SenseGlove | Settings")
-    FORCEINLINE ESGPositionalTrackingHardware GetHardwareOffset(const USGSettings* Settings);
+    static ESGPositionalTrackingHardware GetHardwareOffset(const USGSettings* Settings);
 
     UFUNCTION(BlueprintCallable, Category="SenseGlove | Settings")
-    FORCEINLINE void SetHardwareOffset(UPARAM(ref) USGSettings* Settings,
-                                       ESGPositionalTrackingHardware InHardWareOffset);
+    static void SetHardwareOffset(UPARAM(ref) USGSettings* Settings, ESGPositionalTrackingHardware InHardWareOffset);
 };