/V4/StockTrader RI/Desktop/StockTraderRI.Modules.Position/PositionSummary/PositionSummaryViewModel.cs

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

// Microsoft patterns & practices

// Composite Application Guidance for Windows Presentation Foundation and Silverlight

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

// 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.ComponentModel.Composition;

using System.Windows.Input;

using Microsoft.Practices.Prism.Events;

using Microsoft.Practices.Prism.ViewModel;

using StockTraderRI.Infrastructure;

using StockTraderRI.Modules.Position.Controllers;

using System;



namespace StockTraderRI.Modules.Position.PositionSummary

{

    [Export(typeof(IPositionSummaryViewModel))]

    [PartCreationPolicy(CreationPolicy.NonShared)]

    public class PositionSummaryViewModel : NotificationObject, IPositionSummaryViewModel

    {

        private PositionSummaryItem currentPositionSummaryItem;



        private readonly IEventAggregator eventAggregator;



        public IObservablePosition Position { get; private set; }



        [ImportingConstructor]

        public PositionSummaryViewModel(IOrdersController ordersController, IEventAggregator eventAggregator, IObservablePosition observablePosition)

        {

            if (ordersController == null)

            {

                throw new ArgumentNullException("ordersController");

            }



            this.eventAggregator = eventAggregator;

            this.Position = observablePosition;



            BuyCommand = ordersController.BuyCommand;

            SellCommand = ordersController.SellCommand;



            this.CurrentPositionSummaryItem = new PositionSummaryItem("FAKEINDEX", 0, 0, 0);

        }



        public ICommand BuyCommand { get; private set; }



        public ICommand SellCommand { get; private set; }



        public string HeaderInfo

        {

            get { return "POSITION"; }

        }



        public PositionSummaryItem CurrentPositionSummaryItem

        {

            get { return currentPositionSummaryItem; }

            set

            {

                if (currentPositionSummaryItem != value)

                {

                    currentPositionSummaryItem = value;

                    this.RaisePropertyChanged(() => this.CurrentPositionSummaryItem);

                    if (currentPositionSummaryItem != null)

                    {

                        eventAggregator.GetEvent<TickerSymbolSelectedEvent>().Publish(

                            CurrentPositionSummaryItem.TickerSymbol);

                    }

                }

            }

        }

    }

}