updateTouchContinue method
Implementation
Future updateTouchContinue(DragUpdateDetails details) async {
//increment
counterEvent = counterEvent + 1 ;
//get info
final start = details.delta.dx;
final end = details.delta.dy;
final howManyPixelScrollByUser = start- end ;
final pixelAfterSpeedResult = howManyPixelScrollByUser * speed;
// Log.k( tag, "updateTouchContinue() - howManyPixelScrollByUser: " + howManyPixelScrollByUser.toString()
// + " / before totalOffset_oneWay: " + totalOffset_oneWay.toString() );
//set total
totalOffset_oneWay += pixelAfterSpeedResult;
//check touch end
await _checkTouchEnd( counterEvent);
}