Introduction to Composite WPF (CAL, Prism): Part 2

using JamSoft.CALDemo.Modules.MusicSearch.Core;
using JamSoft.CALDemo.Modules.PageManager.Core;
using Microsoft.Practices.Composite.Events;
using Microsoft.Practices.Composite.Wpf.Events;
using Microsoft.Practices.Unity;

namespace JamSoft.CALDemo.Modules.MusicSearch
{
    public class MusicSearchPresenter : IPage, IMusicSearchPresenter
    {
        private readonly IUnityContainer _container;
        private readonly IEventAggregator _eventAggregator;
        private readonly IMusicSearchPresenterModel _model;
        private readonly IMusicSearchView _view;
        private readonly IPageManager _pageManager;

        private bool _isActivePage;

        public MusicSearchPresenter(IUnityContainer container,
                                    IEventAggregator eventAggregator,
                                    IMusicSearchPresenterModel model,
                                    IMusicSearchView view,
                                    IPageManager pageManager)
        {
            _container = container;
            _eventAggregator = eventAggregator;

            _model = model;

            _pageManager = pageManager;
            _pageManager.Pages.Add(this);

            _view = view;
            _view.Model = _model;

            _eventAggregator.GetEvent<PageSelectedEvent>().Subscribe(OnPageSelected, ThreadOption.UIThread);
        }

        private void OnPageSelected(IPage page)
        {
            if (page == this)
            {
                _model.ActivateModel();
            }
            else
            {
                _model.DeactiveModel();
            }
        }

        public string ID
        {
            get { return "Music Brainz"; }
        }

        public float Position
        {
            get { return 100F; }
        }

        public object View
        {
            get { return _view; }
        }

        public bool IsActivePage
        {
            set 
            { 
                _isActivePage = value;
            }
        }
    }
}