add the USGVirtualHandComponent::OnHandVisibilityChanged() event

Source/SenseGlove/Private/SenseGlove/Components/SGVirtualHandComponent.cpp

@@ -99,9 +99,9 @@ struct USGVirtualHandComponent::FImpl
      * Member variables
      ************************/
 
-    FCollisionResponseContainer CachedCollisionResponse;
-    ECollisionEnabled::Type CachedCollisionEnabled;
     bool bCachedGenerateOverlapEvents;
+    ECollisionEnabled::Type CachedCollisionEnabled;
+    FCollisionResponseContainer CachedCollisionResponse;
 
     /************************
      * Owner object
@@ -146,6 +146,8 @@ struct USGVirtualHandComponent::FImpl
     void UpdateVisibility();
 
     void DrawDebugVirtualHand() const;
+
+    void TriggerHandVisibilityChangedEvent(bool bNewVisibility) const;
 };
 
 const TArray<FName>& USGVirtualHandComponent::GetLeftHandBoneNames()
@@ -240,6 +242,10 @@ USGVirtualHandComponent::USGVirtualHandComponent(const FObjectInitializer& Objec
     WristTracker = nullptr;
 }
 
+void USGVirtualHandComponent::OnHandVisibilityChanged_Implementation(bool bNewVisibility)
+{
+}
+
 void USGVirtualHandComponent::SetRight(const bool bInRight)
 {
     bRight = bInRight;
@@ -470,8 +476,8 @@ FRotator USGVirtualHandComponent::GetHandBoneRefRotation(const int32 Joint) cons
 }
 
 USGVirtualHandComponent::FImpl::FImpl(USGVirtualHandComponent* InOwner)
-    : CachedCollisionEnabled(InOwner->GetCollisionEnabled()),
+    : bCachedGenerateOverlapEvents(InOwner->GetGenerateOverlapEvents()),
-      bCachedGenerateOverlapEvents(InOwner->GetGenerateOverlapEvents()),
+      CachedCollisionEnabled(InOwner->GetCollisionEnabled()),
       Owner(InOwner)
 
 {
@@ -595,19 +601,19 @@ const FReferenceSkeleton& USGVirtualHandComponent::FImpl::GetRefSkeleton() const
 
 void USGVirtualHandComponent::FImpl::DisableCollisionResponse()
 {
+    bCachedGenerateOverlapEvents = Owner->GetGenerateOverlapEvents();
     CachedCollisionEnabled = Owner->GetCollisionEnabled();
     CachedCollisionResponse = Owner->GetCollisionResponseToChannels();
-    bCachedGenerateOverlapEvents = Owner->GetGenerateOverlapEvents();
-    Owner->SetCollisionResponseToAllChannels(ECR_Ignore);
-    Owner->SetCollisionEnabled(ECollisionEnabled::NoCollision);
     Owner->SetGenerateOverlapEvents(false);
+    Owner->SetCollisionEnabled(ECollisionEnabled::NoCollision);
+    Owner->SetCollisionResponseToAllChannels(ECR_Ignore);
 }
 
 void USGVirtualHandComponent::FImpl::RestoreCollisionResponse() const
 {
-    Owner->SetCollisionResponseToChannels(CachedCollisionResponse);
-    Owner->SetCollisionEnabled(CachedCollisionEnabled);
     Owner->SetGenerateOverlapEvents(bCachedGenerateOverlapEvents);
+    Owner->SetCollisionEnabled(CachedCollisionEnabled);
+    Owner->SetCollisionResponseToChannels(CachedCollisionResponse);
 }
 
 void USGVirtualHandComponent::FImpl::SetVisibility(const bool bInVisible)
@@ -622,6 +628,8 @@ void USGVirtualHandComponent::FImpl::SetVisibility(const bool bInVisible)
     {
         DisableCollisionResponse();
     }
+
+    TriggerHandVisibilityChangedEvent(bInVisible);
 }
 
 void USGVirtualHandComponent::FImpl::UpdateVisibility()
@@ -664,6 +672,12 @@ void USGVirtualHandComponent::FImpl::DrawDebugVirtualHand() const
     FSGDebugVirtualHand::Draw(World, MotionControllerData, Owner->DebugVirtualHandSettings);
 }
 
+void USGVirtualHandComponent::FImpl::TriggerHandVisibilityChangedEvent(const bool bNewVisibility) const
+{
+    Owner->HandVisibilityChangedEvent.Broadcast(bNewVisibility);
+    Owner->OnHandVisibilityChanged(bNewVisibility);
+}
+
 void USGVirtualHandComponent::FImplDeleter::operator()(const FImpl* P) const
 {
     delete P;

Source/SenseGlove/Public/SenseGlove/Components/SGVirtualHandComponent.h

@@ -62,6 +62,17 @@ class SENSEGLOVE_API USGVirtualHandComponent : public USkeletalMeshComponent
 {
     GENERATED_UCLASS_BODY()
 
+public:
+    DECLARE_EVENT_OneParam(USGVirtualHandComponent, FHandVisibilityChangedEvent, bool bNewVisibiliy);
+
+    FHandVisibilityChangedEvent& OnHandVisibilityChanged()
+    {
+        return HandVisibilityChangedEvent;
+    };
+
+private:
+    FHandVisibilityChangedEvent HandVisibilityChangedEvent;
+
 public:
     static const TArray<FName>& GetLeftHandBoneNames();
     static const TArray<FName>& GetRightHandBoneNames();
@@ -136,6 +147,10 @@ private:
     UPROPERTY(Transient)
     USGWristTrackerComponent* WristTracker;
 
+protected:
+    UFUNCTION(BlueprintNativeEvent, Category="SenseGlove | Components | Virtual Hand Component")
+    void OnHandVisibilityChanged(bool bNewVisibility);
+
 public:
     FORCEINLINE bool IsLeft() const
     {