---
source_files:
  - Common/DTS.Common/Events/DTS.Viewer/ViewerChartOptions/ResetZoomChangedEvent.cs
  - Common/DTS.Common/Events/DTS.Viewer/ViewerChartOptions/CursorShowChangedEvent.cs
  - Common/DTS.Common/Events/DTS.Viewer/ViewerChartOptions/CursorsClearChangedEvent.cs
  - Common/DTS.Common/Events/DTS.Viewer/ViewerChartOptions/CursorShowMinMaxChangedEvent.cs
  - Common/DTS.Common/Events/DTS.Viewer/ViewerChartOptions/CursorsAlailableChangedEvent.cs
  - Common/DTS.Common/Events/DTS.Viewer/ViewerChartOptions/SaveToPDFRequestedEvent.cs
  - Common/DTS.Common/Events/DTS.Viewer/ViewerChartOptions/ChartAxisChangedEvent.cs
  - Common/DTS.Common/Events/DTS.Viewer/ViewerChartOptions/ChartOptionsChangedEvent.cs
generated_at: "2026-04-17T16:02:47.398492+00:00"
model: "zai-org/GLM-5-FP8"
schema_version: 1
sha256: "795f6e3411213c28"
---

# ViewerChartOptions

### Purpose
This module defines Prism-based event classes for chart viewer operations, enabling loosely-coupled communication between components in the viewer subsystem. Events cover zoom reset, cursor display/clearing, PDF export, and axis/options changes. Uses the older `Microsoft.Practices.Prism.Events` namespace (Prism 4.x or earlier).

### Public Interface

**ResetZoomChangedEvent**
- Inherits `CompositePresentationEvent<bool>` - Event payload is a boolean.

**CursorShowChangedEvent**
- Inherits `CompositePresentationEvent<bool>` - Event payload is a boolean.

**CursorsClearChangedEvent**
- Inherits `CompositePresentationEvent<bool>` - Event payload is a boolean.

**CursorShowMinMaxChangedEvent**
- Inherits `CompositePresentationEvent<bool>` - Event payload is a boolean.

**CursorsAlailableChangedEvent**
- Inherits `CompositePresentationEvent<bool>` - Event payload is a boolean. Note: typo in class name ("Alailable" vs "Available").

**SaveToPDFRequestedEvent**
- Inherits `CompositePresentationEvent<string>` - Event payload is a string (likely file path).

**ChartAxisChangedEvent**
- Inherits `CompositePresentationEvent<ChartAxisChangedEventArg>` - Event payload is `ChartAxisChangedEventArg`.

**ChartAxisChangedEventArg**
- `IBaseViewModel ParentVM { get; set; }` - Parent view model reference.
- `string Axis { get; set; }` - Axis identifier.
- `double MinValue { get; set; }` - Minimum axis value.
- `double MaxValue { get; set; }` - Maximum axis value.

**ChartOptionsChangedEvent**
- Inherits `CompositePresentationEvent<ChartOptionsChangedEventArg>` - Event payload is `ChartOptionsChangedEventArg`.

**ChartOptionsChangedEventArg**
- `IBaseViewModel ParentVM { get; set; }` - Parent view model reference.
- `IChartOptionsModel Model { get; set; }` - Chart options model.
- `string ChartType { get; set; }` - Chart type identifier.

### Invariants
- All events inherit from `CompositePresentationEvent<T>` and are empty classes (no additional members).
- Event args classes (`ChartAxisChangedEventArg`, `ChartOptionsChangedEventArg`) are mutable POCOs with public getters and setters.
- The `