Arrow keys don't trigger any key event when input mode is set to game + ui (or just ui)

Roy_Wierer.Seda145 · April 20, 2022, 12:09pm

Not impossible, you can still detect the input device through an input processor and work from there.

gist.github.com

https://gist.github.com/sinbad/9b8f8007fb1e55f1a952cce2d12aaac1

InputModeDetector.cpp

#include "InputModeDetector.h"
#include "Input/Events.h"

FInputModeDetector::FInputModeDetector()
{
    // 4 local players should be plenty usually (will expand if necessary)
    LastInputModeByPlayer.Init(EInputMode::Mouse, 4);
}

bool FInputModeDetector::HandleKeyDownEvent(FSlateApplication& SlateApp, const FKeyEvent& InKeyEvent)

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InputModeDetector.h

#pragma once

#include "CoreMinimal.h"
#include "InputCoreTypes.h"
#include "Framework/Application/IInputProcessor.h"

#include "UObject/ObjectMacros.h" // for UENUM

UENUM(BlueprintType)
enum class EInputMode : uint8

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UGameInstanceUsage.cpp

// You probably want to do this from your GameInstance subclass
...
// Namespace level in header
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnInputModeChanged, int, PlayerIndex, EInputMode, InputMode);
...
// In class declaration:
protected:
    TSharedPtr<FInputModeDetector> InputDetector;  
public:
	/// Event raised when input mode changed between gamepad / keyboard / mouse

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