Worms4Editor/W4Gui/IntNumericUpDown.cs

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Media;
using System.Text;
using System.Threading.Tasks;

namespace W4Gui
{
    public class IntNumericUpDown : UpDownBase
    {
        private int value = 0;
        private bool updating = false;
        public int Value
        {
            get
            {
                if (this.UserEdit) ValidateEditText();
                return this.value;
            }
            set
            {
                this.value = value;
                UpdateEditText();
            }
        }

        public override void DownButton()
        {
            try
            {
                this.Value--;
            }
            catch (OverflowException) { this.Value = Int32.MinValue; };
        }

        public override void UpButton()
        {
            try
            {
                this.Value++;
            }
            catch (Exception) { this.Value = Int32.MaxValue; };
        }


        protected override void UpdateEditText()
        {
            if (this.updating) return;

            this.updating = true;
            this.Text = this.Value.ToString();
            this.updating = false;
        }

        protected override void OnTextBoxKeyPress(object? source, KeyPressEventArgs e)
        {
            base.OnTextBoxKeyPress(source, e);

            if (Char.IsDigit(e.KeyChar)) return;
            else if ("-\b".Contains(e.KeyChar.ToString().ToLower().First())) return;
            else if ((Control.ModifierKeys & (Keys.Control | Keys.Alt)) != 0) return;
            
            e.Handled = true;
            SystemSounds.Beep.Play();
        }

        protected override void OnLostFocus(EventArgs e)
        {
            base.OnLostFocus(e);
            if (UserEdit)
            {
                UpdateEditText();
            }
        }
        protected override void ValidateEditText()
        {
            try
            {
                this.value = Int32.Parse(this.Text);
                UpdateEditText();
            }
            catch (OverflowException ex)
            {
                if(this.Text.StartsWith("-")) this.Value = Int32.MinValue;
                else this.Value = Int32.MaxValue;
            }
            catch
            {
                UpdateEditText();
            }
            finally
            {
                UserEdit = false;
            };
        }

    }
}