using System;
using System.Windows.Controls;
using GalaSoft.MvvmLight;
using GalaSoft.MvvmLight.Messaging;
using Muchinfo.MTPClient.Infrastructure.Helpers;

namespace Muchinfo.MTPClient.Infrastructure.Windows
{
    public class UnloadCleanWindow : UserControl, IDisposable
    {
        public UnloadCleanWindow()
        {
            this.Unloaded += AutoCleanWindow_Unloaded;
        }

        protected void AutoCleanWindow_Unloaded(object sender, System.Windows.RoutedEventArgs e)
        {
            MessengerHelper.DefaultUnregister(this);
            var viewModel = this.DataContext as ViewModelBase;
            if (viewModel != null)
            {
                viewModel.Cleanup();
            }
        }

        /// <summary>
        /// 执行与释放或重置非托管资源相关的应用程序定义的任务。
        /// </summary>
        public virtual void Dispose()
        {
            AutoCleanWindow_Unloaded(null, null);
            this.DataContext = null;
        }
    }
}