dependOn<T extends InheritedWidget> method

@protected Coral<T> dependOn<T extends InheritedWidget>({ Object? aspect, })

Creates a reactive Coral pipeline subscribing to an InheritedWidget of type T from the element tree.

• aspect: Optional aspect identifier for fine-grained dependency tracking when T is an InheritedModel.

Requires:

• An ancestor InheritedWidget of type T must exist in the element tree when the pipeline is evaluated.

Ensures:

• Automatically triggers didChangeDependencies and re-computes the pipeline whenever T (or aspect) updates.
• Returns a non-null reactive Coral<T> pipeline emitting instances of T.

Throws:

• Throws a null assertion error if no ancestor InheritedWidget of type T is found. Use maybeDependOn if optional.

Example:

class MyComponent extends ComplexComputation<Widget> with CorallineBuildContextAware {
  late final themeCoral = dependOn<ThemeWidget>();
}

Implementation

@protected
@pragma('vm:prefer-inline')
Coral<T> dependOn<T extends InheritedWidget>({Object? aspect}) {
  return context
      .map((e) => e.dependOnInheritedWidgetOfExactType<T>(aspect: aspect)!)
      .distinct();
}