20 lines
1.6 KiB
Markdown
20 lines
1.6 KiB
Markdown
# Helpers — index
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Cross-cutting utilities. See [`schema.md`](../schema.md) for the memory-map conventions.
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| File | Purpose |
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|------|---------|
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| `ViewModelBase.cs` | `INotifyPropertyChanged` + `SetProperty<T>()` — base for all ViewModels |
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| `RelayCommand.cs` | `ICommand` implementation for all button actions |
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| `AppLog.cs` | File logger to `%APPDATA%\ytLlive\startup.log`; startup checkpoints + unhandled-exception capture (the crash this map is named for) |
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| `FocusPreservingListBox.cs` | `ListBox` subclass that keeps selection/focus coherent when the selected item is deleted; `IsSelectable` predicate skips hidden scenes; drag-reorder guard |
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| `OAuthCredentials.cs` | Baked-in Google OAuth client ID/secret (desktop app; loopback callback) |
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| `TokenStore.cs` | DPAPI-protected OAuth session persistence (`%APPDATA%\ytLlive\ytLlive.auth`, CurrentUser scope); `Save`/`Load`/`Clear` — sign-in survives restarts |
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| `ImageCache.cs` | Image byte caching (assets live in the DB) |
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| `InverseBoolToVisibilityConverter.cs` / `NotNullToVisibilityConverter.cs` | XAML value converters for visibility bindings |
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| `CameraConflictProbe.cs` | Best-effort diagnostic: when a camera won't start, enumerates running processes known to hold cameras (OBS, Zoom, Teams, NVIDIA Broadcast, browsers, etc.) — Windows doesn't expose "which process has this device" via any public API, so this is a suspect list, not a verdict |
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Related: [`Themes/Controls.xaml`](../Themes/Controls.xaml) styles the lists this
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class backs; [`Models/index.md`](../Models/index.md) and
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[`ViewModels/index.md`](../ViewModels/index.md) for the objects it works on.
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