# Grids

Core grid system built on DevExpress `DxGrid` with SignalR-based data binding, CRUD operations, layout persistence, fullscreen mode, and an info panel for row details.

## Key Files

- **`MgGridBase.cs`** -- `MgGridBase<TSignalRDataSource, TDataItem, TId, TLoggerClient>`, the main abstract grid component. Extends `DxGrid` and binds to an `AcSignalRDataSource` for real-time CRUD via SignalR message tags. Supports master-detail hierarchy (`ParentGrid`, `GetRootGrid`), row navigation, edit state tracking, layout auto-save/load/reset via localStorage, and fullscreen toggle.
- **`MgGridSignalRDataSource.cs`** -- `MgGridSignalRDataSource<TDataItem, TId>`, a `GridCustomDataSource` that wraps `AcSignalRDataSource`. Returns local data instantly for previously-seen filter criteria while refreshing from the server in the background. Handles filter, sort, paging, unique values, and summary calculations locally.
- **`MgGridDataColumn.cs`** -- Extends `DxGridDataColumn` with InfoPanel visibility/order parameters and a `UrlLink` template that renders cells as hyperlinks with `{Property}` placeholder substitution via compiled accessors.
- **`MgGridInfoPanel.razor.cs`** -- `MgGridInfoPanel` component implementing `IInfoPanelBase`. Displays focused-row details with responsive column layout, edit/view mode, sticky positioning via JS interop, and cached column/display-text lookups.
- **`MgGridToolbarBase.cs`** -- Extends `DxToolbar` with `Grid`, `RefreshClick`, and `ShowOnlyIcon` parameters.
- **`GridEditMode.cs`** -- `MgGridEditState` enum: `None`, `New`, `Edit`.
- **`MgGridHelper.cs`** -- Placeholder helper (empty).
- **`MgGridToolbarHelper.cs`** -- Placeholder helper (empty).
- **`MgGridInfoPanelHelper.cs`** -- Placeholder helper (empty).