add method
- Selectable selectable
override
Adds the selectable
into the registrar.
A Selectable must register with the SelectionRegistrar in order to receive selection events.
Implementation
@override
void add(Selectable selectable) {
assert(_selectable == null);
_selectable = selectable;
_selectable!.addListener(_updateSelectionStatus);
_selectable!.pushHandleLayers(_startHandleLayerLink, _endHandleLayerLink);
}