public void SetElement(VisualElement element)
{
ScrollView oldElement = _view;
_view = (ScrollView)element;
if (oldElement != null)
{
oldElement.PropertyChanged -= HandlePropertyChanged;
oldElement.LayoutChanged -= HandleLayoutChanged;
((IScrollViewController)oldElement).ScrollToRequested -= OnScrollToRequested;
}
if (element != null)
{
OnElementChanged(new VisualElementChangedEventArgs(oldElement, element));
if (_container == null)
{
Tracker = new VisualElementTracker(this);
_container = new ScrollViewContainer(_view, Context);
}
_view.PropertyChanged += HandlePropertyChanged;
_view.LayoutChanged += HandleLayoutChanged;
Controller.ScrollToRequested += OnScrollToRequested;
LoadContent();
UpdateBackgroundColor();
UpdateOrientation();
UpdateIsEnabled();
UpdateHorizontalScrollBarVisibility();
UpdateVerticalScrollBarVisibility();
UpdateFlowDirection();
element.SendViewInitialized(this);
if (!string.IsNullOrEmpty(element.AutomationId))
{
ContentDescription = element.AutomationId;
}
}
EffectUtilities.RegisterEffectControlProvider(this, oldElement, element);
}
protected override void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
_disposed = true;
if (disposing)
{
SetElement(null);
Tracker?.Dispose();
Tracker = null;
RemoveAllViews();
_container?.Dispose();
_container = null;
}
base.Dispose(disposing);
}