This module defines foundational interfaces for the digital input channels view-model/view layer within the TTS (presumably Test Terminal System) test setup import functionality. It establishes the contract between the UI presentation layer (IDigitalInputChannelsView) and its corresponding data-binding context (IDigitalInputChannelsViewModel), enabling separation of concerns and testability in the UI architecture. The interfaces are minimal and serve as extension points in a larger MVVM (Model-View-ViewModel) pattern implementation, specifically for digital input channel configuration or monitoring UI components.
2. Public Interface
IDigitalInputChannelsView Signature:public interface IDigitalInputChannelsView : IBaseView Behavior: Represents the view layer for digital input channels. It inherits from IBaseView, implying it participates in a standard view lifecycle (e.g., initialization, binding, disposal). No additional members are defined in this interface; it acts as a marker interface for type-safe view resolution and dependency injection.
IDigitalInputChannelsViewModel Signature:public interface IDigitalInputChannelsViewModel : IBaseViewModel Behavior: Represents the view-model layer for digital input channels. It inherits from IBaseViewModel, implying standard view-model responsibilities (e.g., command handling, state management, INotifyPropertyChanged implementation). It exposes a single property:
View: A get/set property of type IDigitalInputChannelsView, used to establish the view-model-to-view link (typical in MVVM for view-first or view-model-first activation patterns).
3. Invariants
IDigitalInputChannelsView must implement IBaseView.
IDigitalInputChannelsViewModel must implement IBaseViewModel.
The View property on IDigitalInputChannelsViewModel must be assignable (read-write), allowing the view-model to hold a reference to its associated view instance.
No additional runtime guarantees (e.g., thread-safety, initialization order) are specified in the source; these are assumed to be handled by the consuming framework or implementation.
4. Dependencies
Depends on:
DTS.Common.Base namespace (specifically IBaseView and IBaseViewModel).
Depended on by (inferred):
Likely consumed by a DI container or UI framework to resolve/view-attach logic for digital input channel UI modules.
Implied consumers include concrete implementations of IDigitalInputChannelsView (e.g., WPF UserControl, WinForms Panel) and IDigitalInputChannelsViewModel (e.g., a class managing DI channel state).
No direct usage in the provided source; dependencies are inferred from the MVVM pattern and namespace structure.
5. Gotchas
No behavior defined: Both interfaces are empty beyond inheritance and the View property. Actual functionality (e.g., channel data, commands, events) must be implemented in concrete classes or extended interfaces—this module only provides structural scaffolding.
Ambiguous View lifecycle: The source does not clarify ownership or lifecycle management of the View reference (e.g., is it weak/strong? who sets/disposes it?). This is common in MVVM but can lead to memory leaks if not handled carefully.
No versioning or extensibility hooks: The interfaces are sealed by design (no methods/events), limiting future extension without breaking changes.
