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docs/ai/DTS Viewer/DTS.Viewer.Modules/DTS.Viewer.Graph/ViewModel.md

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+---
+source_files:
+  - DTS Viewer/DTS.Viewer.Modules/DTS.Viewer.Graph/ViewModel/GraphViewModel.cs
+generated_at: "2026-04-17T15:54:22.914651+00:00"
+model: "zai-org/GLM-5-FP8"
+schema_version: 1
+sha256: "469500f219f64049"
+---
+
+# GraphViewModel Documentation
+
+## 1. Purpose
+
+`GraphViewModel` is a Prism-based MVVM ViewModel that manages graph visualization within the DTS Viewer application. It serves as a coordinator between parent views (`IViewerMainViewModel` or `IPSDReportMainViewModel`), child views (`ITestDataSeriesView`), and the event aggregation system. The class handles channel selection state, displays progress indicators during data loading operations, and manages UI visibility states for messaging and graph display regions.
+
+---
+
+## 2. Public Interface
+
+### Constructor
+```csharp
+public GraphViewModel(IGraphView view, IRegionManager regionManager, IEventAggregator eventAggregator, IUnityContainer unityContainer)
+```
+Initializes the ViewModel, sets the View's DataContext to itself, and creates `NotificationRequest` and `ConfirmationRequest` instances.
+
+### Properties
+
+| Property | Type | Access | Description |
+|----------|------|--------|-------------|
+| `View` | `IGraphView` | get; private set; | The associated graph view interface. |
+| `Parent` | `IBaseViewModel` | internal get; set; | Reference to the parent ViewModel. |
+| `DataSeriesView` | `ITestDataSeriesView` | get; set; | The data series view associated with this graph. |
+| `NotificationRequest` | `InteractionRequest<Notification>` | get; private set; | Used to raise notification dialogs. |
+| `ConfirmationRequest` | `InteractionRequest<Confirmation>` | get; private set; | Used to raise confirmation dialogs. |
+| `ContextGraphRegion` | `object` | get; set; | Wraps `((GraphView)View).GraphRegion.Content` with property change notification. |
+|