cirnogodot/Scripts/UI/KeyRemappingItem.cs

using System.Linq;
using Godot;

namespace Cirno.Scripts.UI;

public partial class KeyRemappingItem : HBoxContainer
{
    public StringName KeyId { get; set; }
    public StringName KeyName { get; set; }

    [Export] public Label NameLabel { get; private set; }
    [Export] public Label InputLabel { get; private set; }

    private bool _active = false;
    
    public override void _Ready()
    {
        NameLabel.Text = KeyName;
        var actions = InputMap.GetActions();
        
        var action = actions.FirstOrDefault(x => x == KeyId);
        var events = InputMap.ActionGetEvents(action);
        
        InputLabel.Text = string.Join(",", events.Select(x => x.AsText()));
    }
    
    public void StartRemap()
    {
        _active = true;
    }

    public override void _Input(InputEvent e)
    {
        if (!_active) return;
        
        if (e is InputEventKey keyEvent && keyEvent.Pressed)
        {
            GD.Print(keyEvent.Keycode);
            InputLabel.Text = keyEvent.Keycode.ToString();
            _active = false;
        }
    }
}