Unity behaviour composition

This reference documents every current public declaration in this part of Pine. Examples run inside App.Mount(), a component factory, or an explicit UI.Root(...) unless they only create state/configuration. Explicit UI.Mount(...) remains available for advanced ownership. Variable names such as count, items and label refer to the typed values described by each example. All APIs run on Unity’s main thread.

UI.Component

public static TView Component<TBehaviour, TView>(Func<TBehaviour, TView> render)

Creates an owned Unity behaviour and renders its native UI in a child reactive scope. Generated Components factories call this helper automatically. The behaviour is a layout-ignored child of the returned UI, so disabling or destroying that UI also affects the behaviour. Render initializes the instance before Unity invokes Awake and OnEnable. The renderer executes once; bindings update retained native objects.

Type parameter	Meaning
TBehaviour	A concrete, non-generic MonoBehaviour used by this component.
TView	The native component returned by the renderer.

Parameter	Meaning
render	Typed instance renderer, called once inside its owned scope.

Returns: The renderer's native UI root, ready to compose with other components.

Ownership: Usually call the generated Components factory instead. This helper requires a live construction scope. It cleans up both the behaviour and all rendered bindings when the view or enclosing scope ends.

// A generated factory has this shape; ordinary application code calls Components.Counter().
var view = UI.Component<Counter, UnityEngine.RectTransform>(render: counter =>
    counter.Create()
);