---
source_files:
  - DataPRO/Modules/Reports/PedestrianAndHeadReports/ViewModel/HeadReportViewModel.cs
  - DataPRO/Modules/Reports/PedestrianAndHeadReports/ViewModel/TRLReportViewModel.cs
generated_at: "2026-04-17T15:58:37.824013+00:00"
model: "zai-org/GLM-5-FP8"
schema_version: 1
sha256: "bc7bfc2f44c9fcf7"
---

# Documentation: PedestrianAndHeadReports ViewModels

## 1. Purpose

This module provides ViewModel implementations for report generation within the DataPRO reporting system. It contains two primary ViewModels: `HeadReportViewModel` for head report functionality (currently limited to XML string handling per source comments), and `TRLReportViewModel` for TRL (Test Research Laboratory) reports that manage test data including acceleration, bending, and shear channel measurements. Both ViewModels follow the MVVM pattern using Microsoft Prism framework, providing input/output view management, event aggregation for cross-component communication, and lifecycle methods for initialization and cleanup.

---

## 2. Public Interface

### HeadReportViewModel

**Class Signature:**
```csharp
[Export(typeof(IHeadReportInputView))]
[Export(typeof(IHeadReportOutputView))]
[PartCreationPolicy(CreationPolicy.Shared)]
public class HeadReportViewModel : IHeadReportViewModel
```

**Constructor:**
```csharp
public HeadReportViewModel(
    IHeadReportInputView inputView, 
    IHeadReportOutputView outputView, 
    IRegionManager regionManager, 
    IEventAggregator eventAggregator, 
    IUnityContainer unityContainer)
```

**Properties:**
| Property | Type | Description |
|----------|------|-------------|
| `InputView` | `IHeadReportInputView` | The input view instance; DataContext is set to `this` during construction |
| `OutputView` | `IHeadReportOutputView` | The output view instance; DataContext is set to `this` during construction |
| `NotificationRequest` | `InteractionRequest<Notification>` | Prism interaction request for displaying notifications |
| `ConfirmationRequest` | `InteractionRequest<Confirmation>` | Prism interaction request for displaying confirmations |
| `IsDirty` | `bool` | Indicates whether the view model has unsaved changes; private setter |
| `IsBusy` | `bool` | Controls busy indicator state; raises `PropertyChanged` on set |
| `IsMenuIncluded` | `bool` | Indicates whether menu is included; raises `PropertyChanged` on set |
| `IsNavigationIncluded` | `bool` | Indicates whether navigation is included; raises `PropertyChanged` on set |
| `HeaderInfo` | `string` | Returns constant string `"MainRegion"` |

**Methods:**
| Method | Return Type | Description |
|--------|-------------|-------------|
| `Cleanup()` | `void` | Empty implementation |
| `CleanupAsync()` | `Task` | Returns `null` |
| `Initialize()` | `void` | Empty implementation |
| `Initialize(object parameter)` | `void` | Empty implementation |
| `Initialize(object parameter, object model)` | `void` | Empty implementation |
| `InitializeAsync()` | `Task` | Returns `null` |
| `InitializeAsync(object parameter)` | `Task` | Returns `null` |
| `Activated()` | `void` | Empty implementation |
| `OnPropertyChanged(string propertyName)` | `void` | Raises `PropertyChanged` event |

**Events:**
- `PropertyChanged` - Standard `INotifyPropertyChanged` implementation

---

### TRLReportViewModel

**Class Signature:**
```csharp
[Export(typeof(ITRLReportInputView))]
[Export(typeof(ITRLReportOutputView))]
[PartCreationPolicy(CreationPolicy.Shared)]
public class TRLReportViewModel : ITRLReportViewModel
```

**Constructor:**
```csharp
public TRLReportViewModel(
    ITRLReportInputView inputView, 
    ITRLReportOutputView outputView,
    IRegionManager regionManager, 
    IEventAggregator eventAggregator, 
    IUnityContainer unityContainer, 
    DTS.Serialization.Test test)
```

**Properties (in addition to those inherited from base pattern):**
| Property | Type | Description |
|----------|------|-------------|
| `Test` | `DTS.Serialization.Test` | The test object containing channel data |
| `AvailableTimeUnits` | `ConstantsAndEnums.TimeUnits[]` | Initialized to