Worms4Editor/W4Gui/FloatNumericUpDown.cs

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

namespace W4Gui
{
    public class FloatNumericUpDown : UpDownBase
    {
        private float value = 0;
        private bool updating = false;
        public float 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 = Single.MinValue; };
        }

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

        protected override void OnLostFocus(EventArgs e)
        {
            base.OnLostFocus(e);
            if (UserEdit)
            {
                UpdateEditText();
            }
        }
        protected override void UpdateEditText()
        {
            if (this.updating) return;

            this.updating = true;
            if (Single.IsNaN(this.Value))
            {
                this.Text = "NaN";
            }
            if (Single.IsNegativeInfinity(this.Value))
            {
                this.Text = "-Inf";
            }
            if (Single.IsPositiveInfinity(this.Value))
            {
                this.Text = "+Inf";
            }
            else
            {
                string floatStr = Convert.ToDouble(this.Value).ToString("G9", CultureInfo.InvariantCulture);
                if (!floatStr.Contains("."))
                    floatStr += ".00";
                this.Text = floatStr;

            }
            this.updating = false;
        }

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

            if (Char.IsDigit(e.KeyChar)) return;
            else if ("+-.infa\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 ValidateEditText()
        {
            try
            {
                this.value = Single.Parse(this.Text);
                UpdateEditText();
            }
            catch (FormatException ex)
            {
                if (this.Text.Equals("NaN", StringComparison.InvariantCultureIgnoreCase))
                    this.value = Single.NaN;
                else if (this.Text.Equals("Inf", StringComparison.InvariantCultureIgnoreCase))
                    this.value = Single.PositiveInfinity;
                else if (this.Text.Equals("+Inf", StringComparison.InvariantCultureIgnoreCase))
                    this.value = Single.PositiveInfinity;
                else if (this.Text.Equals("-Inf", StringComparison.InvariantCultureIgnoreCase))
                    this.value = Single.NegativeInfinity;
                UpdateEditText();
            }
            catch (OverflowException ex)
            {
                if (this.Text.StartsWith("-")) this.Value = Single.MinValue;
                else this.value = Single.MaxValue;
                UpdateEditText();
            }
            catch
            {
                // Leave value alone
            }
            finally
            {
                UserEdit = false;
            }
        }

    }
}