﻿// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

using System;

namespace Altaxo.Main
{
  /// <summary>
  /// PropertyChangedEventHandler with the old and new value.
  /// </summary>
  public delegate void PropertyChangedEventHandler<T>(object sender, PropertyChangedEventArgs<T> e);

  /// <summary>
  /// PropertyChangedEventArgs that contains the old and new value.
  /// </summary>
  public class PropertyChangedEventArgs<T> : EventArgs
  {
    private readonly T oldValue;
    private readonly T newValue;

    public PropertyChangedEventArgs(T oldValue, T newValue)
    {
      this.oldValue = oldValue;
      this.newValue = newValue;
    }

    public T OldValue
    {
      get { return oldValue; }
    }

    public T NewValue
    {
      get { return newValue; }
    }
  }
}
