import GestureHandler , { HammerInputExt } from './GestureHandler' ; import { PixelRatio } from 'react-native' ; abstract class DraggingGestureHandler extends GestureHandler { get shouldEnableGestureOnSetup ( ) { return true ; } transformNativeEvent ( { deltaX , deltaY , velocityX , velocityY , center : { x , y } , } ) { const rect = this . view ! . getBoundingClientRect ( ) ; const ratio = PixelRatio . get ( ) ; return { translationX : deltaX - ( this . __initialX || 0 ) , translationY : deltaY - ( this . __initialY || 0 ) , absoluteX : x , absoluteY : y , velocityX : velocityX * ratio , velocityY : velocityY * ratio , x : x - rect . left , y : y - rect . top , } ; } } export default DraggingGestureHandler ;