WB_Hotkeys redesigned to use enhanced input. Amazing!

Source/Integration/LuprexUserWidget.cpp

@@ -0,0 +1,84 @@
+#include "LuprexUserWidget.h"
+#include "EnhancedInputComponent.h"
+#include "InputAction.h"
+
+UlxUserWidget::UlxUserWidget(const FObjectInitializer& ObjectInitializer)
+	: Super(ObjectInitializer)
+{
+}
+
+void UlxUserWidget::NativeOnInitialized()
+{
+	Super::NativeOnInitialized();
+	BackupInputComponent();
+}
+
+void UlxUserWidget::BackupInputComponent()
+{
+	SavedEnhancedActionEventBindings.Reset();
+
+	UEnhancedInputComponent* EIC = Cast<UEnhancedInputComponent>(InputComponent);
+	if (!EIC) return;
+
+	const TArray<EventBinding>& Live = EIC->GetActionEventBindings();
+	SavedEnhancedActionEventBindings.Reserve(Live.Num());
+	for (const EventBinding& Binding : Live)
+	{
+		SavedEnhancedActionEventBindings.Add(Binding->Clone());
+	}
+}
+
+void UlxUserWidget::DisableEventBinding(const UInputAction* InputAction)
+{
+	UEnhancedInputComponent* EIC = Cast<UEnhancedInputComponent>(InputComponent);
+	if (!EIC) return;
+
+	TArray<EventBinding>& Bindings = GetMutableActionEventBindings(EIC);
+	Bindings.RemoveAll([InputAction](const EventBinding& B)
+	{
+		return B->GetAction() == InputAction;
+	});
+}
+
+void UlxUserWidget::RestoreInputBinding(const UInputAction* InputAction)
+{
+	DisableEventBinding(InputAction);
+
+	UEnhancedInputComponent* EIC = Cast<UEnhancedInputComponent>(InputComponent);
+	if (!EIC) return;
+
+	TArray<EventBinding>& Live = GetMutableActionEventBindings(EIC);
+	for (const EventBinding& Saved : SavedEnhancedActionEventBindings)
+	{
+		if (Saved->GetAction() == InputAction)
+		{
+			Live.Add(Saved->Clone());
+		}
+	}
+}
+
+void UlxUserWidget::RedirectInputAction(const UInputAction* From, const UInputAction* To)
+{
+	DisableEventBinding(From);
+
+	UEnhancedInputComponent* EIC = Cast<UEnhancedInputComponent>(InputComponent);
+	if (!EIC) return;
+
+	for (const EventBinding& Saved : SavedEnhancedActionEventBindings)
+	{
+		if (Saved->GetAction() == To)
+		{
+			TSharedPtr<FEnhancedInputActionEventBinding> Clone(Saved->Clone().Release());
+			EIC->BindActionInstanceLambda(From, Saved->GetTriggerEvent(),
+				[Clone](const FInputActionInstance& Data)
+				{
+					Clone->Execute(Data);
+				});
+		}
+	}
+}
+
+TArray<UlxUserWidget::EventBinding>& UlxUserWidget::GetMutableActionEventBindings(UEnhancedInputComponent* EIC)
+{
+	return const_cast<TArray<EventBinding>&>(EIC->GetActionEventBindings());
+}