onHorizontalDragUpdate method
Implementation
void onHorizontalDragUpdate(double delta) {
if (!_state.canSwipeHorizontally) return;
if (_horizontalSnapController.isAnimating) {
_horizontalSnapController.stop();
}
_state = _state.copyWith(
horizontalDragOffset: _state.horizontalDragOffset + delta,
);
notifyListeners();
}