Initial work on prompt widget

Source/Integration/PlayerControllerBase.cpp

@@ -1,5 +1,7 @@
 #include "PlayerControllerBase.h"
 #include "Common.h"
+#include "GameFramework/InputDeviceSubsystem.h"
+#include "GameFramework/InputSettings.h"
 #include "RootCanvas.h"
 #include "Tangible.h"
 #include "TangibleManager.h"
@@ -246,6 +248,25 @@ void AlxPlayerControllerBase::BuildInputStack(TArray<UInputComponent*>& InputSta
 	}
 }
 
+static ElxInputMode DetectInputMode(const ULocalPlayer *LocalPlayer)
+{
+	UInputDeviceSubsystem *IDS = GEngine->GetEngineSubsystem<UInputDeviceSubsystem>();
+	if (!IDS) return ElxInputMode::KeyboardMouse;
+
+	FHardwareDeviceIdentifier Device = IDS->GetMostRecentlyUsedHardwareDevice(LocalPlayer->GetPlatformUserId());
+	if (Device.PrimaryDeviceType != EHardwareDevicePrimaryType::Gamepad)
+	{
+		return ElxInputMode::KeyboardMouse;
+	}
+
+	FString DeviceName = Device.HardwareDeviceIdentifier.ToString();
+	if (DeviceName.Contains(TEXT("PS4")) || DeviceName.Contains(TEXT("PS5")) || DeviceName.Contains(TEXT("PlayStation")))
+	{
+		return ElxInputMode::PlayStationGamepad;
+	}
+	return ElxInputMode::XboxGamepad;
+}
+
 void AlxPlayerControllerBase::UpdateInputMode()
 {
 	// Get all the various objects we need to be able to manipulate
@@ -302,6 +323,13 @@ void AlxPlayerControllerBase::UpdateInputMode()
 
 	GameViewportClient->SetIgnoreInput(false);
 
+	ElxInputMode NewInputMode = DetectInputMode(LocalPlayer);
+	if (NewInputMode != CurrentInputMode)
+	{
+		CurrentInputMode = NewInputMode;
+		OnInputModeChanged.Broadcast(CurrentInputMode);
+	}
+
 	// We always put keyboard focus on whatever user widget is in
 	// front.  If the front widget doesn't want keyboard focus,
 	// then we put keyboard focus on the viewport.
@@ -318,6 +346,11 @@ void AlxPlayerControllerBase::UpdateInputMode()
 	}
 }
 
+ElxInputMode AlxPlayerControllerBase::GetInputMode(const UObject *Context)
+{
+	return FromContext(Context)->CurrentInputMode;
+}
+
 void AlxPlayerControllerBase::UpdateLookAt()
 {
 	UlxTangibleManager *TM = GetGameInstance()->GetSubsystem<UlxTangibleManager>();