API Reference > imodeljs-frontend > Views > Decorator Decorator Interface Interface for drawing Decorations into, or on top of, the active ScreenViewports managed by ViewManager. Decorators generate Decorations. Extends ViewportDecorator Implemented by AccuSnap Methods Name Description getDecorationGeometry(hit: HitDetail): undefined | GeometryStreamProps Optional If Decorator.testDecorationHit or Decorator.overrideElementHit returned true, implement this method to return the snappable geometry for this Decorator. getDecorationToolTip(hit: HitDetail): Promise<string | HTMLElement> Optional If Decorator.testDecorationHit or Decorator.overrideElementHit returned true, implement this method to return the tooltip message for this Decorator. onDecorationButtonEvent(hit: HitDetail, ev: BeButtonEvent): Promise<EventHandled> Optional If Decorator.testDecorationHit or Decorator.overrideElementHit returned true, implement this method to handle a button event for this Decorator. overrideElementHit(hit: HitDetail): boolean Optional If the Decorator.decorate method created pickable graphics using a persistent element id instead of a transient id, testDecorationHit(id: string): boolean Optional If the Decorator.decorate method created pickable graphics, return true if the supplied Id is from this Decorator. Inherited methods Name Inherited from Description decorate(context: DecorateContext): void ViewportDecorator Implement this method to add Decorations into the supplied DecorateContext. Inherited properties Name Type Inherited from Description useCachedDecorations Readonly undefined | "true" ViewportDecorator Override to enable cached decorations for this decorator. Defined in core/frontend/src/ViewManager.ts Line 23 Last Updated: 11 June, 2024