void _addScrollingNotifierListener()
{
if (this.widget.closeOnScroll)
{
this._scrollPosition = Scrollable.of(this.context)?.position;
if (this._scrollPosition != null)
{
this._scrollPosition.isScrollingNotifier.addListener(this._isScrollingListener);
}
}
}
public override void didChangeDependencies()
{
base.didChangeDependencies();
if (this._position != null)
{
this._position.isScrollingNotifier.removeListener(this._isScrollingListener);
}
this._position = Scrollable.of(this.context)?.position;
if (this._position != null)
{
this._position.isScrollingNotifier.addListener(this._isScrollingListener);
}
}