import { EventData , GestureStateTypes , PanGestureEventData , Page , View , ScrollView } from '@nativescript/core' ; export function pageLoaded ( args ) { var page = < Page > args . object ; } let currentDeltaY = 0 ; export function panLayout ( args ) { const view = < View > args . object ; const scrollView = < ScrollView > view . parent ; if ( args . state === GestureStateTypes . began ) { currentDeltaY = 0 ; scrollView . isScrollEnabled = false ; } else if ( args . state === GestureStateTypes . changed ) { const diff = args . deltaY - currentDeltaY ; view . translateY += diff ; currentDeltaY = args . deltaY ; } else if ( args . state === GestureStateTypes . ended ) { scrollView . isScrollEnabled = true ; } }