---
source_files:
  - DTS Viewer/DTS.Viewer.Modules/DTS.Viewer.ChartOptions/View/ChartOptionsView.xaml.cs
generated_at: "2026-04-16T13:56:57.437477+00:00"
model: "zai-org/GLM-5-FP8"
schema_version: 1
sha256: "2fdf05f68ae69d8d"
---

# Documentation: ChartOptionsView

## 1. Purpose

`ChartOptionsView` is a WPF view component that provides user interface logic for configuring chart display options. It implements the `IChartOptionsView` interface, serving as the visual layer for chart-related settings within the DTS Viewer application. The view exposes available filter class options that can be applied to sensor data visualization.

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## 2. Public Interface

### `ChartOptionsView()` (Constructor)
**Signature:** `public ChartOptionsView()`

Initializes a new instance of the `ChartOptionsView` class. Calls `InitializeComponent()` to load the associated XAML layout.

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### `AvailableCFC` (Property)
**Signature:** `public List<IFilterClass> AvailableCFC { get; }`

A read-only property that returns the list of available filter classes (CFC = Constant Fraction Classes, per FB 13120). 

**Behavior:** Each access instantiates a new `AnalogSettingDefaults` object and returns its `FilterOptions` property.

**Returns:** `List<IFilterClass>` containing the available filter options.

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## 3. Invariants

- The `AvailableCFC` property getter always creates a **new instance** of `AnalogSettingDefaults` on every access; it does not cache or reuse the object.
- The view always implements `IChartOptionsView` as its contract with the rest of the system.
- The XAML component (referenced via `InitializeComponent()`) is expected to be present and properly compiled as part of the partial class definition.

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## 4. Dependencies

### This module depends on:
| Namespace | Type Used |
|-----------|-----------|
| `DTS.Common.Interface` | `IChartOptionsView` |
| `DTS.Common.Interface.Sensors.SoftwareFilters` | `IFilterClass` |
| `DTS.SensorDB` | `AnalogSettingDefaults` |

### What depends on this module:
**Unclear from source alone.** The `IChartOptionsView` interface suggests a presenter, view model, or controller consumes this view, but no direct consumers are visible in this file.

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## 5. Gotchas

1. **Instance creation on every property access:** The `AvailableCFC` property instantiates a new `AnalogSettingDefaults` object on every call. If this property is data-bound in XAML and accessed frequently (e.g., by a UI update loop), it could create unnecessary object allocations and GC pressure. Consider whether caching would be appropriate.

2. **FB 13120 reference:** The XML comment references "FB 13120" (likely a feature/bug tracking identifier). The business context for why this property exists or what specific requirement it addresses is not clear from source alone.

3. **Partial class definition:** This is a partial class. The XAML file (`ChartOptionsView.xaml`) defines additional structure (base class, visual elements) that is not visible here. The actual base class (likely `UserControl` or similar) is defined in the XAML.