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docs/ai/Common/DTS.Common/Events/DTS.Viewer/ViewerChartOptions.md

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+---
+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 `