protected virtual SnapManager GetSnapManager()
{
if (_snapManager == null)
{
_snapManager = new SnapManager(ItemsLayout, this);
}
return(_snapManager);
}
protected virtual void UpdateSnapBehavior()
{
if (_snapManager == null)
{
_snapManager = new SnapManager(ItemsView, this);
}
_snapManager.UpdateSnapBehavior();
}
protected virtual void TearDownOldElement(ItemsView oldElement)
{
if (oldElement == null)
{
return;
}
// Stop listening for layout property changes
if (_layout != null)
{
_layout.PropertyChanged -= LayoutPropertyChanged;
}
// Stop listening for property changes
oldElement.PropertyChanged -= OnElementPropertyChanged;
// Stop listening for ScrollTo requests
oldElement.ScrollToRequested -= ScrollToRequested;
if (_recyclerViewScrollListener != null)
{
_recyclerViewScrollListener.Dispose();
ClearOnScrollListeners();
_recyclerViewScrollListener = null;
}
if (ItemsViewAdapter != null)
{
// Stop watching for empty items or scroll adjustments
_emptyCollectionObserver.Stop(ItemsViewAdapter);
_itemsUpdateScrollObserver.Stop(ItemsViewAdapter);
// Unhook whichever adapter is active
SetAdapter(null);
_emptyViewAdapter?.Dispose();
ItemsViewAdapter?.Dispose();
}
if (_snapManager != null)
{
_snapManager.Dispose();
_snapManager = null;
}
if (_itemDecoration != null)
{
RemoveItemDecoration(_itemDecoration);
}
}
protected virtual void TearDownOldElement(ItemsView oldElement)
{
if (oldElement == null)
{
return;
}
// Stop listening for layout property changes
if (_layout != null)
{
_layout.PropertyChanged -= LayoutOnPropertyChanged;
}
// Stop listening for property changes
oldElement.PropertyChanged -= OnElementPropertyChanged;
// Stop listening for ScrollTo requests
oldElement.ScrollToRequested -= ScrollToRequested;
if (ItemsViewAdapter != null)
{
Unwatch(ItemsViewAdapter);
SetAdapter(null);
ItemsViewAdapter.Dispose();
}
if (_snapManager != null)
{
_snapManager.Dispose();
_snapManager = null;
}
if (_itemDecoration != null)
{
RemoveItemDecoration(_itemDecoration);
}
}
protected virtual void UpdateSnapBehavior()
{
_snapManager = GetSnapManager();
_snapManager.UpdateSnapBehavior();
}
