protected override void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
if (disposing)
{
_scroller?.Dispose();
_scroller = null;
RecyclerView.RemoveOnScrollListener(_scrollListener);
_scrollListener?.Dispose();
_scrollListener = null;
Adapter?.Dispose();
Adapter = null;
LayoutManager?.Dispose();
LayoutManager = null;
((IListViewController)Element).ScrollToRequested -= OnScrollToRequested;
}
_disposed = true;
base.Dispose(disposing);
}
protected override void OnElementChanged(ElementChangedEventArgs <CollectionView> e)
{
base.OnElementChanged(e);
if (e.OldElement != null)
{
((IListViewController)e.OldElement).ScrollToRequested -= OnScrollToRequested;
if (Adapter != null)
{
Adapter?.Dispose();
Adapter = null;
}
}
if (e.NewElement != null)
{
((IListViewController)e.NewElement).ScrollToRequested += OnScrollToRequested;
_scroller = new SelectableSmoothScroller(Context);
}
}
protected override void OnElementChanged(ElementChangedEventArgs <CollectionView> e)
{
base.OnElementChanged(e);
if (e.NewElement != null)
{
if (RecyclerView == null)
{
RecyclerView = new RecyclerView(Context);
_refresh = new SwipeRefreshLayout(Context);
_refresh.SetOnRefreshListener(this);
_refresh.AddView(RecyclerView, LayoutParams.MatchParent, LayoutParams.MatchParent);
SetNativeControl(_refresh);
}
LayoutManager = new GridLayoutManager(Context, 2);
_spanSizeLookup = new CollectionViewSpanSizeLookup(this);
_gridLayoutManager.SetSpanSizeLookup(_spanSizeLookup);
RecyclerView.Focusable = false;
RecyclerView.DescendantFocusability = Android.Views.DescendantFocusability.AfterDescendants;
RecyclerView.OnFocusChangeListener = this;
RecyclerView.SetClipToPadding(false);
_itemDecoration = new GridCollectionItemDecoration(this);
RecyclerView.AddItemDecoration(_itemDecoration);
Adapter = new CollectionViewAdapter(Context, _gridCollectionView, RecyclerView, this);
RecyclerView.SetAdapter(Adapter);
RecyclerView.SetLayoutManager(_gridLayoutManager);
Adapter.IsAttachedToWindow = IsAttached;
UpdateGroupHeaderHeight();
UpdatePullToRefreshEnabled();
UpdatePullToRefreshColor();
}
}
protected override void OnElementChanged(ElementChangedEventArgs <CollectionView> e)
{
base.OnElementChanged(e);
if (e.OldElement != null)
{
((IListViewController)e.OldElement).ScrollToRequested -= OnScrollToRequested;
if (Adapter != null)
{
Adapter?.Dispose();
Adapter = null;
}
e.OldElement.SetLoadMoreCompletionAction = null;
}
if (e.NewElement != null)
{
((IListViewController)e.NewElement).ScrollToRequested += OnScrollToRequested;
_scroller = new SelectableSmoothScroller(Context);
_scrollListener = new CollectionViewScrollListener(e.NewElement);
RecyclerView.AddOnScrollListener(_scrollListener);
e.NewElement.SetLoadMoreCompletionAction = (isEnd) => _scrollListener.IsReachedBottom = isEnd;
}
}