import Hammer from '@egjs/hammerjs' ; import { DEG_RAD } from './constants' ; import { HammerInputExt } from './GestureHandler' ; import IndiscreteGestureHandler from './IndiscreteGestureHandler' ; class RotationGestureHandler extends IndiscreteGestureHandler { get name ( ) { return 'rotate' ; } get NativeGestureClass ( ) { return Hammer . Rotate ; } transformNativeEvent ( { rotation , velocity , center } ) { return { rotation : ( rotation - ( this . initialRotation ?? 0 ) ) * DEG_RAD , anchorX : center . x , anchorY : center . y , velocity , } ; } } export default RotationGestureHandler ;