---
source_files:
  - DTS Viewer/DTS.Viewer.Loader/View/ShellView.xaml.cs
generated_at: "2026-04-17T16:14:09.336185+00:00"
model: "zai-org/GLM-5-FP8"
schema_version: 1
sha256: "96ab4a7b54264b7e"
---

# View

### Purpose
This module contains the `ShellViewModel` class, which serves as the ViewModel for the main application shell in a WPF application built using the Prism framework. It acts as the orchestration layer for the UI, managing the view's DataContext, handling interaction requests (notifications/confirmations), and coordinating region navigation via the `IRegionManager`. It bridges the view (`IShellView`) and the backend services via dependency injection (`IUnityContainer`) and event aggregation (`IEventAggregator`).

### Public Interface
*   **`ShellViewModel(IShellView view, IRegionManager regionManager, IEventAggregator eventAggregator, IUnityContainer unityContainer)`**
    *   Constructor that initializes the ViewModel, sets the View's DataContext to itself, instantiates `InteractionRequest` objects, and subscribes to the `RaiseNotification` event.
*   **`void Initialize()` / `void Initialize(object parameter)`**
    *   Empty initialization methods.
*   **`void Activated()`**
    *   Empty activation method.
*   **`void Cleanup()`**
    *   Throws `NotImplementedException`.
*   **`Task CleanupAsync()` / `Task InitializeAsync()` / `Task InitializeAsync(object parameter)`**
    *   Asynchronous lifecycle methods that currently throw `NotImplementedException`.
*   **`List<FrameworkElement> GetRegions()`**
    *   Returns a list of framework elements named "Region" within the `MainShell` grid of the view.
*   **`Object ContextMainRegion`**
    *   Property that gets or sets the content of the `MainRegion` ContentControl in the View. Triggers `OnPropertyChanged` on set.
*   **`InteractionRequest<Notification> NotificationRequest`**
    *   Property used to raise popup notifications in the UI.
*   **`InteractionRequest<Confirmation> ConfirmationRequest`**
    *   Property used to raise confirmation dialogs in the UI.
*   **Properties**: `Width`, `Height`, `IsMenuIncluded`, `IsNavigationIncluded`, `HeaderInfo` (returns "MainRegion"), `IsBusy`, `IsDirty` (read-only).

### Invariants
*   The `View` property is assigned in the constructor and is never expected to be null during the object's lifetime.
*   `NotificationRequest` and `ConfirmationRequest` are initialized immediately in the constructor and are never null.
*   The `HeaderInfo` property always returns the string "MainRegion".
*   `IsDirty` is a read-only property (effectively always false/default unless logic exists elsewhere).

### Dependencies
*   **Dependencies:**
    *   `DTS.Common.Events` (for `RaiseNotification`, `NotificationContentEventArgs`)
    *   `DTS.Common.Interface` (for `IShellView`, `IViewerShellView`, `IViewerShellViewModel`)
    *   `DTS.Common.Utils` (for `Utils.GetChildrenByName`)
    *   `DTS.Common.Base`
    *   `Microsoft.Practices.Prism.Events` (for `IEventAggregator`)
    *   `Microsoft.Practices.Prism.Regions` (for `IRegionManager`)
    *   `Microsoft.Practices.Prism.Interactivity.InteractionRequest`
    *   `Microsoft.Practices.Unity` (for `IUnityContainer`)
    *   `System.ComponentModel.Composition`
*   **