merge

1 files changed, 28 insertions, 18 deletions

diff --git a/Software/Visual_Studio/MachineStudio/Tango.MachineStudio.UI/ViewModels/MachineConnectionViewVM.cs b/Software/Visual_Studio/MachineStudio/Tango.MachineStudio.UI/ViewModels/MachineConnectionViewVM.cs
index 7737911e0..ce49d805e 100644
--- a/Software/Visual_Studio/MachineStudio/Tango.MachineStudio.UI/ViewModels/MachineConnectionViewVM.cs
+++ b/Software/Visual_Studio/MachineStudio/Tango.MachineStudio.UI/ViewModels/MachineConnectionViewVM.cs
@@ -19,18 +19,16 @@ namespace Tango.MachineStudio.UI.ViewModels
     /// <seealso cref="Tango.MachineStudio.Common.Notifications.DialogViewVM" />
     public class MachineConnectionViewVM : DialogViewVM
     {
-        private EmulatorExternalBridge _emulator;
-
-        private ExternalBridgeScanner _scanner;
-        /// <summary>
-        /// Gets or sets the machine scanner.
-        /// </summary>
+        private static ExternalBridgeScanner _scanner;
         public ExternalBridgeScanner Scanner
         {
             get { return _scanner; }
             set { _scanner = value; RaisePropertyChangedAuto(); }
         }
 
+
+        private EmulatorExternalBridge _emulator;
+
         private IExternalBridgeClient _selectedMachine;
         /// <summary>
         /// Gets or sets the selected machine.
@@ -50,11 +48,15 @@ namespace Tango.MachineStudio.UI.ViewModels
         /// Initializes a new instance of the <see cref="MachineConnectionViewVM"/> class.
         /// </summary>
         /// <param name="scanner">The scanner.</param>
-        public MachineConnectionViewVM(ExternalBridgeScanner scanner)
+        public MachineConnectionViewVM()
         {
+            if (_scanner == null)
+            {
+                _scanner = new ExternalBridgeScanner();
+            }
+
             EnableDiagnostics = true;
             UploadHardwareConfiguration = true;
-            Scanner = scanner;
             ConnectCommand = new RelayCommand(Connect, (x) => SelectedMachine != null);
         }
 
@@ -65,7 +67,7 @@ namespace Tango.MachineStudio.UI.ViewModels
         {
             if (SelectedMachine != null)
             {
-                Scanner.Stop();
+                _scanner.Stop();
                 Accept();
             }
         }
@@ -75,7 +77,7 @@ namespace Tango.MachineStudio.UI.ViewModels
         /// </summary>
         protected override void Cancel()
         {
-            Scanner.Stop();
+            _scanner.Stop();
             base.Cancel();
         }
 
@@ -85,19 +87,27 @@ namespace Tango.MachineStudio.UI.ViewModels
         public override void OnShow()
         {
             base.OnShow();
-            Scanner.AvailableMachines.Clear();
 
-            if (SettingsManager.Default.GetOrCreate<MachineStudioSettings>().UseExternalBridgeEmulator)
+            try
             {
-                if (_emulator != null)
+                _scanner.AvailableMachines.Clear();
+
+                if (SettingsManager.Default.GetOrCreate<MachineStudioSettings>().UseExternalBridgeEmulator)
                 {
-                    _emulator.Disconnect();
+                    if (_emulator != null)
+                    {
+                        _emulator.Disconnect();
+                    }
+                    _emulator = new EmulatorExternalBridge();
                 }
-                _emulator = new EmulatorExternalBridge();
-            }
 
-            Scanner.AvailableMachines.Add(_emulator);
-            Scanner.Start();
+                _scanner.AvailableMachines.Add(_emulator);
+                _scanner.Start();
+            }
+            catch (Exception ex)
+            {
+                LogManager.Log(ex, "Error starting external bridge scanner.");
+            }
         }
 
         private bool _enableDiagnostics;