IoC and NavigationService implementation

main/MyFriendsAround.WP7/ViewModel/AboutViewModel.cs

@@ -0,0 +1,72 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Device.Location;
+using System.Net;
+using System.ServiceModel.Channels;
+using System.Windows;
+using System.Windows.Input;
+using GalaSoft.MvvmLight;
+using GalaSoft.MvvmLight.Command;
+using GalaSoft.MvvmLight.Messaging;
+using GalaSoft.MvvmLight.Threading;
+using Hammock;
+using Hammock.Serialization;
+using Microsoft.Phone.Controls;
+using Microsoft.Silverlight.Testing;
+using MyFriendsAround.Common.Entities;
+using MyFriendsAround.WP7.Service;
+using MyFriendsAround.WP7.Utils;
+using Newtonsoft.Json;
+
+namespace MyFriendsAround.WP7.ViewModel
+{
+    public class AboutViewModel : ViewModelBase
+    {
+        public string ApplicationTitle
+        {
+            get
+            {
+                return "MyFriendsAround";
+            }
+        }
+
+        public string PageName
+        {
+            get
+            {
+                return "About";
+            }
+        }
+
+
+        /// <summary>
+        /// Initializes a new instance of the MainViewModel class.
+        /// </summary>
+        public AboutViewModel()
+        {
+            if (IsInDesignMode)
+            {
+                // Code runs in Blend --> create design time data.
+            }
+            else
+            {
+                // Code runs "for real"
+            }
+
+        }
+
+
+
+
+        public string AppBarTextAbout {
+            get { return "About"; }
+        }
+
+        public string AppBarTextPublish
+        {
+            get { return "Publish"; }
+        }
+
+    }
+}

main/MyFriendsAround.WP7/ViewModel/Container.cs

@@ -0,0 +1,40 @@
+using System;
+using System.Net;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Documents;
+using System.Windows.Ink;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Animation;
+using System.Windows.Shapes;
+using MicroIoc;
+
+namespace MyFriendsAround.WP7.ViewModel
+{
+    public sealed class Container
+    {
+        Container()
+        {
+        }
+
+        public static IMicroIocContainer Instance
+        {
+            get
+            {
+                return Nested.instance;
+            }
+        }
+
+        class Nested
+        {
+            // Explicit static constructor to tell C# compiler
+            // not to mark type as before field init
+            static Nested()
+            {
+            }
+            internal static readonly IMicroIocContainer instance =
+                new MicroIocContainer();
+        }
+    }
+}

main/MyFriendsAround.WP7/ViewModel/MainViewModel.cs

@@ -51,14 +51,6 @@ namespace MyFriendsAround.WP7.ViewModel
             }
         }
 
-        public string Welcome
-        {
-            get
-            {
-                return "Welcome to MVVM Light";
-            }
-        }
-
         /// <summary>
         /// Initializes a new instance of the MainViewModel class.
         /// </summary>
@@ -68,6 +60,7 @@ namespace MyFriendsAround.WP7.ViewModel
             PublishLocationCommand = new RelayCommand(() => PublishLocationAction());
             DisplayAboutCommand = new RelayCommand(() => DisplayAbout());
             InputBoxCommand = new RelayCommand(() => InputBox());
+            NavigateToAboutCommand = new RelayCommand(() => NavigateToAbout());
 
             if (IsInDesignMode)
             {
@@ -82,6 +75,12 @@ namespace MyFriendsAround.WP7.ViewModel
 
         }
 
+        private void  NavigateToAbout()
+        {
+            //
+            this.PageNav.NavigateTo(new Uri("/Views/AboutPage.xaml", UriKind.Relative));
+        }
+
         private void InputBox()
         {
             MessageBox.Show("Input box");
@@ -102,7 +101,7 @@ namespace MyFriendsAround.WP7.ViewModel
                                  //f.LocationStr
                                  result.Add(new PushPinModel()
                                                   {
-                                                      PinSource = "ApplicationIcon.png",
+                                                      PinSource = "/ApplicationIcon.png",
                                                       Location = new GeoCoordinate(f.Latitude, f.Longitude)
                                                   });
                              });            
@@ -161,10 +160,17 @@ namespace MyFriendsAround.WP7.ViewModel
             }
         }
 
-        public RelayCommand PublishLocationCommand { get; set; }
-        public RelayCommand DisplayAboutCommand { get; set; }
-        public RelayCommand InputBoxCommand { get; set; }
-        
+        public ICommand PublishLocationCommand { get; set; }
+        public ICommand DisplayAboutCommand { get; set; }
+        public ICommand InputBoxCommand { get; set; }
+
+        public ICommand NavigateToAboutCommand
+        {
+            get;
+            private set;
+        }
+
+
         public string MyName { get; set; }
 
         public string AppBarTextAbout {

main/MyFriendsAround.WP7/ViewModel/ViewModelBase.cs

@@ -0,0 +1,43 @@
+using System;
+using System.Net;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Documents;
+using System.Windows.Ink;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Animation;
+using System.Windows.Shapes;
+    using MyFriendsAround.WP7.Helpers.Navigation;
+
+namespace MyFriendsAround.WP7.ViewModel
+{
+    public class ViewModelBase : GalaSoft.MvvmLight.ViewModelBase
+    {
+        private object context;
+        public object Context
+        {
+            get { return context; }
+            set
+            {
+                if (context == value)
+                    return;
+                context = value;
+                RaisePropertyChanged("Context");
+            }
+        }
+
+        /// <summary>
+        /// Gets PageNavigation from Container
+        /// </summary>
+        public IPageNavigation PageNav
+        {
+            get
+            {
+                IPageNavigation pageNav =
+                    (IPageNavigation)Container.Instance.Resolve(typeof(PageNavigation), "PageNavigation");
+                return pageNav;
+            }
+        }
+    }
+}

main/MyFriendsAround.WP7/ViewModel/ViewModelLocator.cs

@@ -14,6 +14,7 @@
   DataContext="{Binding Source={x:Static vm:ViewModelLocatorTemplate.ViewModelNameStatic}}"
 */
 
+using MyFriendsAround.WP7.Helpers.Navigation;
 namespace MyFriendsAround.WP7.ViewModel
 {
     /// <summary>
@@ -55,81 +56,79 @@ namespace MyFriendsAround.WP7.ViewModel
     /// </summary>
     public class ViewModelLocator
     {
-        private static MainViewModel _main;
 
         /// <summary>
         /// Initializes a new instance of the ViewModelLocator class.
         /// </summary>
         public ViewModelLocator()
         {
-            ////if (ViewModelBase.IsInDesignModeStatic)
-            ////{
-            ////    // Create design time view models
-            ////}
-            ////else
-            ////{
-            ////    // Create run time view models
-            ////}
-
-            CreateMain();
-        }
-
-        /// <summary>
-        /// Gets the Main property.
-        /// </summary>
-        public static MainViewModel MainStatic
-        {
-            get
+            if (ViewModelBase.IsInDesignModeStatic)
             {
-                if (_main == null)
-                {
-                    CreateMain();
-                }
-
-                return _main;
+                // Create design time view models
             }
+            else
+            {
+                //Register PageNavigation - only if not design time
+                Container.Instance.RegisterInstance(typeof(PageNavigation), "PageNavigation");
+
+                // Create run time view models
+            }
+
+            Container.Instance.RegisterInstance(typeof(MainViewModel), "MainViewModel");
+            Container.Instance.RegisterInstance(typeof(AboutViewModel), "AboutViewModel");
         }
 
         /// <summary>
         /// Gets the Main property.
         /// </summary>
-        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance",
-            "CA1822:MarkMembersAsStatic",
-            Justification = "This non-static member is needed for data binding purposes.")]
         public MainViewModel Main
         {
             get
             {
-                return MainStatic;
+                MainViewModel mainViewModel = GetViewModel<MainViewModel>();
+                return mainViewModel;
             }
         }
 
         /// <summary>
-        /// Provides a deterministic way to delete the Main property.
+        /// Gets the About property.
         /// </summary>
-        public static void ClearMain()
+        public AboutViewModel About
         {
-            _main.Cleanup();
-            _main = null;
-        }
-
-        /// <summary>
-        /// Provides a deterministic way to create the Main property.
-        /// </summary>
-        public static void CreateMain()
-        {
-            if (_main == null)
+            get
             {
-                _main = new MainViewModel();
+                AboutViewModel aboutViewModel = GetViewModel<AboutViewModel>();
+                return aboutViewModel;
             }
         }
 
+
         /// <summary>
         /// Cleans up all the resources.
         /// </summary>
-        public static void Cleanup()
+        public void Cleanup()
         {
-            ClearMain();
+            MainViewModel mainViewModel = GetViewModel<MainViewModel>();
+            mainViewModel.Cleanup();
+            AboutViewModel aboutViewModel = GetViewModel<AboutViewModel>();
+            aboutViewModel.Cleanup();
         }
+
+
+
+        #region Local Helpers
+
+        private T GetViewModel<T>() where T : ViewModelBase
+        {
+            // Create a new view model
+            T vm = Container.Instance.Resolve<T>();
+
+            //Assign the Context from PageNavigation to Context property of the ViewModelBase
+            vm.Context = vm.PageNav.CurrentContext;
+
+            return vm;
+        }
+
+        #endregion
     }
 }