GSSelectableElementProtocol

Overview

The protocol exposes the selection-relevant subset of GSBaseObject for model objects and transient editing handles that do not inherit from it. It does not store selection state or define how an object is selected.

A common interface for positioned objects that can participate in layer editing and selection.

Overview

Conforming objects include persistent model elements and transient editing handles. The protocol provides the ownership context, position, and edit-locking state needed by selection and editing APIs, but does not store selection state or define selection behavior.

The parent is the object that directly contains the selectable element. The layer is the layer in whose coordinate system the element is positioned. Either can be nil when the element is detached or has no corresponding context.