/V1/trunk/Source/QuickStarts/EventAggregation/ModuleB/ActivityPresenter.cs

//===============================================================================

// Microsoft patterns & practices

// Composite Application Guidance for Windows Presentation Foundation

//===============================================================================

// Copyright (c) Microsoft Corporation.  All rights reserved.

// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY

// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT

// LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND

// FITNESS FOR A PARTICULAR PURPOSE.

//===============================================================================

// The example companies, organizations, products, domain names,

// e-mail addresses, logos, people, places, and events depicted

// herein are fictitious.  No association with any real company,

// organization, product, domain name, email address, logo, person,

// places, or events is intended or should be inferred.

//===============================================================================



using System.Diagnostics;

using System.Globalization;

using EventAggregation.Infrastructure;

using Microsoft.Practices.Composite.Events;

using Microsoft.Practices.Composite.Wpf.Events;

using ModuleB.Properties;



namespace ModuleB

{

    public class ActivityPresenter

    {

        private string _customerId;

        private IEventAggregator eventAggregator;

        private SubscriptionToken subscriptionToken;



        public ActivityPresenter(IEventAggregator eventAggregator)

        {

            this.eventAggregator = eventAggregator;

        }



        void FundAddedEventHandler(FundOrder fundOrder)

        {

            Debug.Assert(View != null);

            View.AddContent(fundOrder.TickerSymbol);

        }



        public IActivityView View { get; set; }



        public string CustomerId

        {

            get { return _customerId; }

            set

            {

                _customerId = value;



                FundAddedEvent fundAddedEvent = eventAggregator.GetEvent<FundAddedEvent>();



                if (subscriptionToken != null)

                {

                    fundAddedEvent.Unsubscribe(subscriptionToken);

                }



                subscriptionToken = fundAddedEvent.Subscribe(FundAddedEventHandler, ThreadOption.UIThread, false,

                                                             fundOrder => fundOrder.CustomerId == _customerId);



                View.Title = string.Format(CultureInfo.CurrentCulture, Resources.ActivityTitle, CustomerId);

            }

        }

    }

}