onHorizontalDragUpdate property
Called when the user scrolls to the left or to the right.
Implementation
GestureDragUpdateCallback get onHorizontalDragUpdate => _onHorizontalDragUpdate;
Implementation
set onHorizontalDragUpdate(GestureDragUpdateCallback value) {
if (_onHorizontalDragUpdate == value)
return;
final bool hadHandler = _onHorizontalDragUpdate != null;
_onHorizontalDragUpdate = value;
if ((value != null) != hadHandler)
markNeedsSemanticsUpdate();
}