---
source_files:
  - DTS Viewer/DTS.Viewer.Modules/DTS.Viewer.ChartOptions/View/ChartOptionsView.xaml.cs
generated_at: "2026-04-16T11:18:57.795839+00:00"
model: "zai-org/GLM-5-FP8"
schema_version: 1
sha256: "2fdf05f68ae69d8d"
---

# Documentation: ChartOptionsView

## 1. Purpose

`ChartOptionsView` is a WPF view component implementing `IChartOptionsView` that provides user interface elements for configuring chart options. It serves as the visual layer for chart-related settings, specifically exposing available filter class options (CFC - likely "Channel Filter Classes" or "Calculated Filter Classes") to the UI for user selection.

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## 2. Public Interface

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

Initializes the view component by calling `InitializeComponent()`, which loads the associated XAML layout.

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

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

**Behavior:** Creates a new instance of `AnalogSettingDefaults` on each access and returns its `FilterOptions` property. This property is read-only (getter only).

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## 3. Invariants

- The `AvailableCFC` property will never return `null` (assuming `AnalogSettingDefaults.FilterOptions` never returns null, which is not verifiable from this source alone).
- The view always implements `IChartOptionsView` interface contract.
- `InitializeComponent()` must be called exactly once during construction (handled by WPF framework conventions).

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## 4. Dependencies

### This module depends on:
- `DTS.Common.Interface` - Provides `IChartOptionsView` interface
- `DTS.Common.Interface.Sensors.SoftwareFilters` - Provides `IFilterClass` interface
- `DTS.SensorDB` - Provides `AnalogSettingDefaults` class

### What depends on this module:
- Not determinable from this source file alone. Consumers would be whatever module creates or references `ChartOptionsView` instances.

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## 5. Gotchas

1. **Object allocation on every property access:** The `AvailableCFC` property instantiates a new `AnalogSettingDefaults` object every time it is read. If this property is data-bound in XAML and accessed frequently, it could create unnecessary object allocations and GC pressure. Consider whether this should be cached or lazy-loaded.

2. **FB 13120 reference:** The comment references "FB 13120" which appears to be an issue/feature tracking identifier. The context or resolution of this tracking item is not available from the source.

3. **Unknown interface contract:** The requirements of `IChartOptionsView` are not visible in this source, so it is unclear if `AvailableCFC` fulfills an interface member or is an additional public member.