PixiEditor/PixiEditorDotNetCore3/Helpers/ToolSizeToIntConverter.cs

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Data;

namespace PixiEditor.Helpers
{
    [ValueConversion(typeof(string), typeof(int))]
    class ToolSizeToIntConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            return string.Format("{0} {1}", value, "px");
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (string.IsNullOrWhiteSpace(value as string)) return null;
            string slicedString = value.ToString().Split(' ').First();
            return int.Parse(slicedString);
        }
    }
}