Get all classes with interface

Development Programming & Scripting Blueprint
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4

I slightly modified findwithinterface to find in viewport widgets for a specific class. DO NOT use this every frame :slight_smile:

template < class T>
void GetUserWidgetsInviewport(UObject* WorldContextObject, TArray<UUserWidget*>& FoundWidgets)
{
//Prevent possibility of an ever-growing array if user uses this in a loop
FoundWidgets.Empty();

if (!WorldContextObject)
{
	return;
}

const UWorld* const World = GEngine->GetWorldFromContextObject(WorldContextObject, EGetWorldErrorMode::LogAndReturnNull);
if (!World)
{
	return;
}

for (TObjectIterator<UUserWidget> Itr; Itr; ++Itr)
{
	UUserWidget* LiveWidget = *Itr;

	// Skip any widget that's not in the current world context or that is not a child of the class specified.
	if (LiveWidget->GetWorld() != World || !LiveWidget->GetClass()->IsChildOf<T>())
	{
		continue;
	}

	if (LiveWidget->IsInViewport())
		FoundWidgets.Add(LiveWidget);
}

}