---
source_files:
  - DTS Viewer/DTS.Viewer.Modules/DTS.Viewer.Navigation/View/NavigationItem.xaml.cs
  - DTS Viewer/DTS.Viewer.Modules/DTS.Viewer.Navigation/View/NavigationView.xaml.cs
generated_at: "2026-04-16T13:57:48.771766+00:00"
model: "zai-org/GLM-5-FP8"
schema_version: 1
sha256: "e298dba7e9bc3e6c"
---

# Documentation: DTS.Viewer.Navigation Views

## 1. Purpose

This module provides WPF view components for the navigation subsystem within the DTS Viewer application. It contains two code-behind classes—`NavigationItem` and `NavigationView`—that serve as the visual elements for rendering navigation items and the overall navigation container, respectively. These views follow the standard WPF code-behind pattern, delegating UI layout to their associated XAML files while implementing framework-specific interfaces for integration with the broader application architecture.

---

## 2. Public Interface

### `NavigationItem` (class)
**Namespace:** `DTS.Viewer.Navigation.View`  
**Implements:** `IBaseView` (from `DTS.Common.Base`)

| Member | Signature | Description |
|--------|-----------|-------------|
| Constructor | `public NavigationItem()` | Default constructor that initializes the XAML component via `InitializeComponent()`. |

---

### `NavigationView` (class)
**Namespace:** `DTS.Viewer.Navigation`  
**Implements:** `INavigationView` (from `DTS.Common.Interface`)

| Member | Signature | Description |
|--------|-----------|-------------|
| Constructor | `public NavigationView()` | Default constructor that initializes the XAML component via `InitializeComponent()`. |

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## 3. Invariants

- Both classes are declared `partial`, indicating they are paired with XAML-generated partial classes at compile time.
- `InitializeComponent()` must be called in the constructor for each view; this is a WPF requirement for loading the associated XAML resource.
- `NavigationItem` must always implement `IBaseView`.
- `NavigationView` must always implement `INavigationView`.
- The namespaces differ: `NavigationItem` resides in `DTS.Viewer.Navigation.View`, while `NavigationView` resides directly in `DTS.Viewer.Navigation`.

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## 4. Dependencies

### This module depends on:
- `DTS.Common.Base` — Provides the `IBaseView` interface used by `NavigationItem`.
- `DTS.Common.Interface` — Provides the `INavigationView` interface used by `NavigationView`.
- WPF infrastructure (implicit via `InitializeComponent()` and partial class pattern).

### What depends on this module:
- **Cannot be determined from source alone.** No downstream consumers are visible in these files. Likely consumers would be module initialization code, view models, or dependency injection containers within the `DTS.Viewer.Navigation` assembly or broader application.

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## 5. Gotchas

- **Interface contracts are unknown:** The behaviors expected by `IBaseView` and `INavigationView` are not visible in these source files. Developers should consult `DTS.Common.Base` and `DTS.Common.Interface` for interface definitions.
- **No additional logic:** Both classes contain only initialization code. Any view-specific behavior (event handlers, data binding setup, etc.) is either in the XAML files or handled elsewhere (e.g., attached view models).
- **Namespace inconsistency:** `NavigationItem` is placed in a `.View` sub-namespace while `NavigationView` is not. This may be intentional or a historical inconsistency—verify project naming conventions before adding new views.
- **XAML files not provided:** The actual UI structure, visual states, and resource dictionaries for these views are defined in `NavigationItem.xaml` and `NavigationView.xaml`, which are not included in this source dump.