[COMMON UI] Disable Confirm Left-Click behavior on Gamepad X

Basically, Gamepad Face Down is treated like a left click, but in some cases this is annoying, for example when you want an InputKeySelector to detect Gamepad Face Down itself and not a left click while rebinding.

Create a custom action router and analog cursor to control when the gamepad Confirm (face button bottom / X) simulates a left mouse click.

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1. Create a custom Action Router

Create a child class from UCommonUIActionRouterBase, for example:

UCustomCommonUIActionRouterBase

Add a member variable:

bool bEnableLeftClickBehavior = false;

Expose two Blueprint-callable functions:

UFUNCTION(BlueprintCallable, Category = "UI|Input")
void SetEnableLeftClickBehaviorActive(bool bActive);

UFUNCTION(BlueprintCallable, Category = "UI|Input")
bool IsLeftClickBehaviorActive() const;

Override MakeAnalogCursor() to use your custom cursor:

TSharedRef<FCommonAnalogCursor> UCustomCommonUIActionRouterBase::MakeAnalogCursor() const
{
    CustomAnalogCursor = FCommonAnalogCursor::CreateAnalogCursor<FCustomCommonAnalogCursor>(*this);
    return CustomAnalogCursor.ToSharedRef();
}

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2. Create a custom Analog Cursor

Create a class that inherits from FCommonAnalogCursor:

FCustomCommonAnalogCursor

Override ShouldVirtualAcceptSimulateMouseButton():

bool FCustomCommonAnalogCursor::ShouldVirtualAcceptSimulateMouseButton(
    const FKeyEvent& InKeyEvent,
    EInputEvent InputEvent) const
{
    const UCustomCommonUIActionRouterBase* MyRouter =
        Cast<UCustomCommonUIActionRouterBase>(&ActionRouter);

    if (MyRouter && !MyRouter->IsLeftClickBehaviorActive())
    {
        return false;
    }

    return FCommonAnalogCursor::ShouldVirtualAcceptSimulateMouseButton(InKeyEvent, InputEvent);
}

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3. Usage

When you need to bind the gamepad face button bottom (X), for example while using an Input Key Selector, simply call:

SetEnableLeftClickBehaviorActive(false);

Re-enable it afterward if needed.

This prevents CommonUI from treating the Confirm action as a virtual left mouse click during rebinding or other specific UI flows.