osu-lazer/osu.Game/Graphics/UserInterface/OsuNumberBox.cs

// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.

namespace osu.Game.Graphics.UserInterface
{
    public partial class OsuNumberBox : OsuTextBox
    {
        protected override bool AllowIme => false;

        protected override bool CanAddCharacter(char character) => char.IsAsciiDigit(character);
    }
}