Catel - Part 4 of n: Unit testing with Catel

// --------------------------------------------------------------------------------------------------------------------
// <copyright file="IViewModelContainer.cs" company="Catel development team">
//   Copyright (c) 2008 - 2011 Catel development team. All rights reserved.
// </copyright>
// <summary>
//   Defines a control as a <see cref="IViewModel" /> container.
// </summary>
// --------------------------------------------------------------------------------------------------------------------

using System;

#if !SILVERLIGHT
using System.ComponentModel;
using System.Windows;
#endif

namespace Catel.MVVM
{
    /// <summary>
    /// Defines a control as a <see cref="IViewModel"/> container.
    /// </summary>
    public interface IViewModelContainer
    {
        #region Properties
        /// <summary>
        /// Gets the view model that is contained by the container.
        /// </summary>
        /// <value>The view model.</value>
        IViewModel ViewModel { get; }
        #endregion

        #region Events
#if !SILVERLIGHT
        /// <summary>
        /// Occurs when a property on the container has changed.
        /// </summary>
        /// <remarks>
        /// This event makes it possible to externally subscribe to property changes of a <see cref="DependencyObject"/>
        /// (mostly the container of a view model) because the .NET Framework does not allows us to.
        /// </remarks>
        event EventHandler<PropertyChangedEventArgs> PropertyChanged;
#endif

        /// <summary>
        /// Occurs when the <see cref="ViewModel"/> property has changed.
        /// </summary>
        event EventHandler<EventArgs> ViewModelChanged;
        #endregion
    }
}