Working on PPC...

1 files changed, 70 insertions, 3 deletions

diff --git a/Software/Visual_Studio/PPC/Tango.PPC.Common/PPCViewModel.cs b/Software/Visual_Studio/PPC/Tango.PPC.Common/PPCViewModel.cs
index ffe5c9a4f..dc7976884 100644
--- a/Software/Visual_Studio/PPC/Tango.PPC.Common/PPCViewModel.cs
+++ b/Software/Visual_Studio/PPC/Tango.PPC.Common/PPCViewModel.cs
@@ -11,29 +11,52 @@ using Tango.PPC.Common.Navigation;
 using Tango.PPC.Common.Notifications;
 using Tango.Settings;
 using Tango.SharedUI;
+using static Tango.SharedUI.Controls.NavigationControl;
 
 namespace Tango.PPC.Common
 {
-    public abstract class PPCViewModel : ViewModel
+    /// <summary>
+    /// Represents a PPC view model base class.
+    /// </summary>
+    /// <seealso cref="Tango.SharedUI.ViewModel" />
+    public abstract class PPCViewModel : ViewModel, INavigationViewModel
     {
+        /// <summary>
+        /// Gets the static observable entities adapter.
+        /// </summary>
         public ObservablesEntitiesAdapter Adapter
         {
             get { return ObservablesEntitiesAdapter.Instance; }
         }
 
+        /// <summary>
+        /// Gets or sets the application manager.
+        /// </summary>
         [TangoInject]
         public IPPCApplicationManager ApplicationManager { get; set; }
 
+        /// <summary>
+        /// Gets or sets the authentication provider.
+        /// </summary>
         [TangoInject]
         public IAuthenticationProvider AuthenticationProvider { get; set; }
 
+        /// <summary>
+        /// Gets or sets the navigation manager.
+        /// </summary>
         [TangoInject]
         public INavigationManager NavigationManager { get; set; }
 
+        /// <summary>
+        /// Gets or sets the notification provider.
+        /// </summary>
         [TangoInject]
         public INotificationProvider NotificationProvider { get; set; }
 
         private PPCSettings _settings;
+        /// <summary>
+        /// Gets the main PPC settings.
+        /// </summary>
         public PPCSettings Settings
         {
             get
@@ -48,25 +71,66 @@ namespace Tango.PPC.Common
             private set { _settings = value; }
         }
 
-        public PPCViewModel()
+        private bool _visible;
+        /// <summary>
+        /// Gets or sets a value indicating whether this <see cref="PPCViewModel"/> view is visible.
+        /// </summary>
+        public bool Visible
         {
-
+            get { return _visible; }
+            private set { _visible = value; RaisePropertyChangedAuto(); }
         }
 
+        /// <summary>
+        /// Called when the application has been started.
+        /// </summary>
         public abstract void OnApplicationStarted();
 
+        /// <summary>
+        /// Called when the application is shutting down.
+        /// </summary>
         public virtual void OnApplicationShuttingDown()
         {
 
         }
+
+        /// <summary>
+        /// Called when the navigation system has navigated to this VM view.
+        /// </summary>
+        public virtual void OnNavigatedTo()
+        {
+            Visible = true;
+        }
+
+        /// <summary>
+        /// Called when the navigation system has navigated from this VM view.
+        /// </summary>
+        public virtual void OnNavigatedFrom()
+        {
+            Visible = false;
+        }
     }
 
+    /// <summary>
+    /// Represents a PPC view model base class a View property as an instance of a <see cref="IPPCView"/> contract.
+    /// </summary>
+    /// <typeparam name="T"></typeparam>
+    /// <seealso cref="Tango.SharedUI.ViewModel" />
     public abstract class PPCViewModel<T> : PPCViewModel where T : IPPCView
     {
+        /// <summary>
+        /// Gets the IPPCView instance.
+        /// </summary>
         public T View { get; private set; }
 
+        /// <summary>
+        /// Gets a value indicating whether the instance of IPPCView is available.
+        /// </summary>
         public bool ViewAttached { get; private set; }
 
+        /// <summary>
+        /// Called when the application has been started.
+        /// </summary>
         public override void OnApplicationStarted()
         {
             TangoIOC.Default.GetInstanceWhenAvailable<T>((view) =>
@@ -77,6 +141,9 @@ namespace Tango.PPC.Common
             });
         }
 
+        /// <summary>
+        /// Called when the instance of IPPCView is available.
+        /// </summary>
         public abstract void OnViewAttached();
     }
 }
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