1 files changed, 69 insertions, 1 deletions

diff --git a/Software/Visual_Studio/PPC/Tango.PPC.UI/PPCApplication/DefaultPPCApplicationManager.cs b/Software/Visual_Studio/PPC/Tango.PPC.UI/PPCApplication/DefaultPPCApplicationManager.cs
index ba1b44c8a..1550e97e1 100644
--- a/Software/Visual_Studio/PPC/Tango.PPC.UI/PPCApplication/DefaultPPCApplicationManager.cs
+++ b/Software/Visual_Studio/PPC/Tango.PPC.UI/PPCApplication/DefaultPPCApplicationManager.cs
@@ -29,6 +29,8 @@ using Tango.BL.Enumerations;
 using Tango.PPC.Common.Notifications;
 using Tango.PPC.Common.WatchDog;
 using Tango.PPC.UI.Dialogs;
+using Tango.Core.Threading;
+using Tango.PPC.Common.Messages;
 
 namespace Tango.PPC.UI.PPCApplication
 {
@@ -48,6 +50,7 @@ namespace Tango.PPC.UI.PPCApplication
         private INotificationProvider _notificationProvider;
         private WatchDogServer _watchdogServer;
         private ObservablesContext _machineContext;
+        private ActionTimer _screenLockTimer;
 
         /// <summary>
         /// Occurs when a system restart is required.
@@ -116,6 +119,16 @@ namespace Tango.PPC.UI.PPCApplication
             }
         }
 
+        private bool _isScreenLocked;
+        /// <summary>
+        /// Gets or sets a value indicating whether the screen is currently locked.
+        /// </summary>
+        public bool IsScreenLocked
+        {
+            get { return _isScreenLocked; }
+            set { _isScreenLocked = value; RaisePropertyChangedAuto(); }
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="DefaultPPCApplicationManager"/> class.
         /// </summary>
@@ -306,6 +319,8 @@ namespace Tango.PPC.UI.PPCApplication
         /// </summary>
         private void FinalizeModuleInitialization()
         {
+            var settings = SettingsManager.Default.GetOrCreate<PPCSettings>();
+
             LogManager.Log("Finalizing application initialization...");
 
             LogManager.Log("Initializing Machine Provider...");
@@ -336,10 +351,30 @@ namespace Tango.PPC.UI.PPCApplication
                     vm.OnApplicationReady();
                 }
 
-                if (SettingsManager.Default.GetOrCreate<PPCSettings>().EnableTechnicianModeByDefault)
+                if (settings.EnableTechnicianModeByDefault)
                 {
                     EnterTechnicianMode(false);
                 }
+
+                if (settings.EnableLockScreen)
+                {
+                    _screenLockTimer = new ActionTimer(settings.LockScreenTimeout);
+                    _screenLockTimer.ResetReplace(ScreenLockTimerAction);
+                }
+
+                TangoMessenger.Default.Register<MachineSettingsSavedMessage>((msg) =>
+                {
+                    if (_screenLockTimer != null)
+                    {
+                        _screenLockTimer.Dispose();
+                    }
+
+                    if (settings.EnableLockScreen)
+                    {
+                        _screenLockTimer = new ActionTimer(settings.LockScreenTimeout);
+                        _screenLockTimer.ResetReplace(ScreenLockTimerAction);
+                    }
+                });
             });
         }
 
@@ -460,5 +495,38 @@ namespace Tango.PPC.UI.PPCApplication
             _moduleLoader.AllModules.ToList().ForEach(x => x.OnTechnicianExited());
             _notificationProvider.ShowInfo("Technician mode is now disabled.");
         }
+
+        /// <summary>
+        /// Invokes a dialog for entering a password and releasing the screen lock.
+        /// </summary>
+        public async void ReleaseScreenLock()
+        {
+            if (IsScreenLocked)
+            {
+                var vm = await _notificationProvider.ShowDialog<ScreenLockViewVM>();
+
+                if (vm.DialogResult)
+                {
+                    if (vm.Password == SettingsManager.Default.GetOrCreate<PPCSettings>().LockScreenPassword)
+                    {
+                        IsScreenLocked = false;
+                        ResetScreenLockTimer();
+                    }
+                }
+            }
+        }
+
+        public void ResetScreenLockTimer()
+        {
+            if (_screenLockTimer != null)
+            {
+                _screenLockTimer.ResetReplace(ScreenLockTimerAction);
+            }
+        }
+
+        private void ScreenLockTimerAction()
+        {
+            IsScreenLocked = true;
+        }
     }
 }