port from perforce

intromat/Intromat/ViewModels/NetworkBreadcrumbViewModel.cs

@@ -0,0 +1,33 @@
+using NodeNetwork.Toolkit.BreadcrumbBar;
+using NodeNetwork.ViewModels;
+using ReactiveUI;
+
+namespace Intromat.ViewModels
+{
+    internal class CodeGenBreadcrumbViewModel : BreadcrumbViewModel
+    {
+        private ReactiveObject? _vm;
+
+        public ReactiveObject? ViewModel
+        {
+            get => _vm;
+            set => this.RaiseAndSetIfChanged(ref _vm, value);
+        }
+    }
+    internal class CodeGenBreadcrumbViewModel<T> : CodeGenBreadcrumbViewModel where T : ReactiveObject
+    {
+        public new T? ViewModel
+        {
+            get => (T?)base.ViewModel;
+            set => base.ViewModel = value;
+        }
+    }
+
+    internal class NetworkBreadcrumbViewModel : CodeGenBreadcrumbViewModel<NetworkViewModel>
+    {
+    }
+
+    internal class SourceBreadcrumbViewModel : CodeGenBreadcrumbViewModel<CodeGenNodeViewModel>
+    {
+    }
+}