using System;

namespace JD.Sequencers.Times
{
    /// <summary>
    /// Standard way of notifying of a value changed.
    /// </summary>
    public class ValueChangedEventArgs<TValue> : EventArgs
    {
        #region Variables

        private readonly TValue m_oldValue;
        private readonly TValue m_newValue;

        #endregion

        #region Constructor

        /// <summary>
        /// Ctor.
        /// </summary>
        /// <param name="oldValue"></param>
        /// <param name="newValue"></param>
        public ValueChangedEventArgs(TValue oldValue, TValue newValue)
        {
            m_oldValue = oldValue;
            m_newValue = newValue;
        }

        #endregion

        #region Properties

        /// <summary>
        /// Value before the changing of value.
        /// </summary>
        public TValue OldValue
        {
            get { return m_oldValue; }
        }

        /// <summary>
        /// Value before the changing of value.
        /// </summary>
        public TValue NewValue
        {
            get { return m_newValue; }
        }

        #endregion
    }
}