GoalBook - A Hybrid Smart Client

//===============================================================================
// Goal Book.
// Copyright © 2009 Mark Brownsword. 
//===============================================================================

#region Using Statements
using System;
using System.Reflection;
using System.Windows.Input;
using GoalBook.Goals.Views;
using GoalBook.Infrastructure;
using GoalBook.Infrastructure.Constants;
using GoalBook.Infrastructure.Enums;
using GoalBook.Infrastructure.Interfaces;
using Microsoft.Practices.Composite.Events;
using Microsoft.Practices.Composite.Modularity;
using Microsoft.Practices.Composite.Presentation.Commands;
#endregion

namespace GoalBook.Goals
{
    [Module(ModuleName = "Goals")]
    public class GoalsModule : IModule
    {        
        private readonly INavigationService _navigation;
        private readonly ILoggerService _logger;
        private readonly IDialogService _dialogService;
        private readonly IPersistenceService _persistenceService;
        private readonly IEventAggregator _eventAggregator;
        private readonly IPrintService _printService;
        private readonly ISettingsService _settingsService;
        private GoalsViewPresenter _goalsViewPresenter;        
        private string _moduleName;        
                                          
        /// <summary>
        /// Constructor.
        /// </summary>
        public GoalsModule(INavigationService navigation, ILoggerService logger, IDialogService dialogService,
            IPersistenceService persistenceService, IEventAggregator eventAggregator, IPrintService printService, ISettingsService settingsService)
        {
            _navigation = navigation;            
            _logger = logger;
            _dialogService = dialogService;
            _persistenceService = persistenceService;
            _eventAggregator = eventAggregator;
            _printService = printService;
            _settingsService = settingsService;
        }

        /// <summary>
        /// Initialize the module.
        /// </summary>
        public void Initialize()
        {
            //Get the ModuleName, as set in the ModuleAttribute for this class.
            ModuleAttribute moduleAttribute = ((ModuleAttribute)this.GetType().GetCustomAttributes(
                typeof(ModuleAttribute), false)[0]);

            _moduleName = moduleAttribute.ModuleName;                        
            MenuInfo menuInfo = new MenuInfo();

            //Initialise the DelegateCommand.
            menuInfo.MenuDelegateCommand = new DelegateCommand<CommandInfo>(
                ShowModuleExecute_EventHandler, CanShowModuleExecute_EventHandler);

            //Initialise the MenuCommandInfo.
            menuInfo.MenuCommandInfo = new CommandInfo(_moduleName, 0, ParentMenuType.Go,
                new Uri(MenuConstants.MENU_NEW_GOAL_IMAGE_URI, UriKind.Absolute), null);

            //Initialise GoalsViewPresenter.
            _goalsViewPresenter = new GoalsViewPresenter(_navigation, _dialogService, _logger, _persistenceService, _eventAggregator, _printService);
            _goalsViewPresenter.View = new GoalsView();
            _goalsViewPresenter.ActionView = new GoalsActionView();
            _goalsViewPresenter.InitViews(); 

            //Add Navigation MenuItem to the Shell's Go menu.
            _navigation.SetNavigationMetadata(menuInfo, _goalsViewPresenter.GetNewMenuInfo());
        }

        /// <summary>
        /// Handle ShowModuleExecuteHandler event. Load the default view each
        /// time the navigation menu item is executed.
        /// </summary>
        private void ShowModuleExecute_EventHandler(CommandInfo parameter)
        {
            if (parameter.Title != _moduleName) { return; }

            Mouse.SetCursor(Cursors.Wait);
            try
            {                
                //Load and Activate the default view.
                if (_navigation.LoadModuleView(
                    _moduleName, 
                    parameter.IconUri, 
                    _goalsViewPresenter.View, 
                    _goalsViewPresenter.ActionView, 
                    _goalsViewPresenter.ViewMenuInfo))
                {
                    _goalsViewPresenter.View.Activate();
                    _goalsViewPresenter.ActionView.Activate();
                }
            }
            finally { Mouse.UpdateCursor(); }
        }

        /// <summary>
        /// Handle CanShowModuleExecuteHandler event. Disable navigation
        /// when default view is currently active.
        /// </summary>
        private bool CanShowModuleExecute_EventHandler(CommandInfo parameter)
        {
            if (_goalsViewPresenter == null) 
            {
                return this._settingsService.StartUpModule != this._moduleName; 
            }
            return !_goalsViewPresenter.View.IsActive;
        }
    }
}