sharee.bike-App/ShareeSharedGuiLib/ViewModel/Bar.cs

using System;
using System.Collections.Generic;
using System.Text;

namespace ShareeSharedGuiLib.ViewModel
{
    public enum ChargingState
    {
        Loaded,
        Empty
    }

    public class Bar
    {
        public Bar(ChargingState? state = null)
        {
            State = state;
        }

        /// <summary>
        /// Gets a value indicating whether bar is charged or not. Null if state is unknown.
        /// </summary>
        public ChargingState? State { get; private set; } = null;

        public string Text
        {
            get
            {
                if (State == null)
                    return string.Empty;

                return State == ChargingState.Loaded ? " +  " : " - ";
            }

        }
    }
}