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docs/ai/DTS Viewer/DTS.Viewer/View/DockPanelHorizontal/ViewModel.md

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+---
+source_files:
+  - DTS Viewer/DTS.Viewer/View/DockPanelHorizontal/ViewModel/DockPanelHorizontalViewModel.cs
+generated_at: "2026-04-17T16:29:26.445526+00:00"
+model: "zai-org/GLM-5-FP8"
+schema_version: 1
+sha256: "ce03b3583ccf9c32"
+---
+
+# ViewModel
+
+### Purpose
+This module provides the `DockPanelHorizontalViewModel` class, a Prism-based ViewModel for a horizontal dock panel UI component in the DTS Viewer application. It serves as a mediator between the view (`IDockPanelHorizontalView`) and the application infrastructure, handling notification requests via Prism's `InteractionRequest` pattern and subscribing to application-wide `RaiseNotification` events.
+
+### Public Interface
+
+**Class:** `DockPanelHorizontalViewModel` (extends `BaseViewModel<IDockPanelHorizontalViewModel>`, implements `IDockPanelHorizontalViewModel`)
+
+**Constructor:**
+```csharp
+public DockPanelHorizontalViewModel(
+    IDockPanelHorizontalView view,
+    IRegionManager regionManager,
+    IEventAggregator eventAggregator,
+    IUnityContainer unityContainer)
+```
+Initializes the ViewModel, sets the View's DataContext to itself, creates `NotificationRequest` and `ConfirmationRequest` instances, and subscribes to the `RaiseNotification` event.
+
+**Properties:**
+- `IDockPanelHorizontalView View { get; }` — The associated view instance.
+- `InteractionRequest<Notification> NotificationRequest { get; }` — Used to raise notification dialogs.
+- `InteractionRequest<Confirmation> ConfirmationRequest { get; }` — Used to raise confirmation dialogs.
+- `bool IsMenuIncluded { get; set; }` — UI state flag.
+- `bool IsNavigationIncluded { get; set; }` — UI state flag.
+- `bool IsBusy { get; set; }` — Indicates busy state.
+- `bool IsDirty { get; private set; }` — Indicates unsaved changes.
+
+**Events:**
+- `event PropertyChangedEventHandler PropertyChanged` — Declared but not explicitly invoked in visible code.
+
+**Methods:**
+- `void OnRaiseNotification(NotificationContentEventArgs eventArgsWithTitle)` — Private handler that raises `NotificationRequest` with title, message, details, and image from the event args.
+- `override void Initialize()` — Throws `NotImplementedException`.
+- `override void Initialize(object parameter)` — Throws `NotImplementedException`.
+- `void Initialize(object parameter, object model)` — Throws `NotImplementedException` (hides base with `new`).
+- `override void Activated()` — Throws `NotImplementedException`.
+- `override void Cleanup()` — Throws `NotImplementedException`.
+- `Task CleanupAsync()` — Throws `NotImplementedException` (hides base with `new`).
+- `override Task InitializeAsync()` — Throws `NotImplementedException`.
+- `override Task InitializeAsync(object parameter)` — Throws `NotImplementedException`.
+
+### Invariants
+- The View's `DataContext` is always set to the ViewModel instance upon construction.
+- The ViewModel subscribes to `RaiseNotification` event via `EventAggregator` on construction.
+- `IsDirty` is read-only externally (private setter).
+
+### Dependencies
+**Depends on:**
+- `DTS.Common.Base` (`BaseViewModel<T>`)
+- `DTS.Common.Events` (`RaiseNotification`, `NotificationContentEventArgs`, `NotificationContentEventArgsWithoutTitle` — inferred from usage)
+- `DTS.Common.Interface` (`IViewModel`, `IDockPanelHorizontalViewModel`, `IDockPanelHorizontalView`)
+- `Microsoft.Practices.Prism.Events` (`IEventAggregator