I had a lot of problems getting OnBeginCursorOver to fire in my Actor subclass in C++. I tried a lot of different approaches on various posts and nothing worked.
Commenting here because this post has had a lot of views and other posts I found expressed similar frustrations.
In the end this worked for me. Turn it on in the APlayerController subclass:
AAdventurePlayerController::AAdventurePlayerController()
{
SetShowMouseCursor(true);
bEnableMouseOverEvents = true;
}
…then in the static mesh actor:
void AHotSpot::BeginPlay()
{
UStaticMeshComponent* StaticMeshComponent = GetStaticMeshComponent();
if (StaticMeshComponent && StaticMeshComponent->GetStaticMesh())
{
StaticMeshComponent->SetCollisionEnabled(ECollisionEnabled::Type::QueryOnly);
StaticMeshComponent->SetCollisionResponseToChannel(ECollisionChannel::ECC_Pawn, ECollisionResponse::ECR_Overlap);
StaticMeshComponent->SetGenerateOverlapEvents(true);
Super::OnBeginCursorOver.AddDynamic(this, &AHotSpot::OnBeginCursorOver);
Super::OnEndCursorOver.AddDynamic(this, &AHotSpot::OnEndCursorOver);
}
}
I did same as you @Ettu_R - with the SetCollisionResponseToChannel but my handlers were messed up (see below).
I also added the line above to set QueryOnly collisions enabled and also SetGenerateOverlapEvents to true.
I also moved the binding of the callbacks to after these flags were set up, just in case.
One thing to note is that the naming of the callback is arbitrary. I had gotten the impression that just naming it that OnBeginCursorOver would work, but of course it doesn’t. You have to bind handlers with these signatures:
//////////////////////////////////
///
/// USER INPUT EVENTS
///
UFUNCTION(BlueprintCallable, Category = "HotSpot")
void OnBeginCursorOver(AActor *TouchedActor);
UFUNCTION(BlueprintCallable, Category = "HotSpot")
void OnEndCursorOver(AActor *TouchedActor);
I’m not sure if other handlers with the UPrimitiveComponent argument ever worked. That was what I had before arriving at this.