using System;
using System.Drawing;
using System.Windows.Forms;

namespace LibationWinForms
{
    public class FormattableLabel : Label
    {
        public string FormatText { get; set; }

        /// <summary>Text set: first non-null, non-whitespace <see cref="Text"/> set is also saved as <see cref="FormatText"/></summary>
        public override string Text
        {
            get => base.Text;
            set
            {
                if (string.IsNullOrWhiteSpace(FormatText))
                    FormatText = value;

                base.Text = value;
            }
        }

        #region ctor.s
        public FormattableLabel() : base() { }
        #endregion

        /// <summary>Replaces the format item in a specified string with the string representation of a corresponding object in a specified array. Returns <see cref="Text"/> for convenience.</summary>
        /// <param name="args">An object array that contains zero or more objects to format.</param>
        public string Format(params object[] args) => Text = string.Format(FormatText, args);
    }
}