public sealed override void OnAttachedToRecyclerView(RecyclerView recyclerView)
{
base.OnAttachedToRecyclerView(recyclerView);
switch (CardType)
{
case RecyclerCardType.FlatHorizontal:
_decoration = new DefaultItemDecoration(Context);
recyclerView.AddItemDecoration(_decoration);
recyclerView.SetLayoutManager(new LinearLayoutManager(Context, _orientation, false));
break;
case RecyclerCardType.Horizontal:
recyclerView.SetLayoutManager(new LinearLayoutManager(Context, _orientation, false));
break;
case RecyclerCardType.Vertical:
recyclerView.SetLayoutManager(new GridLayoutManager(Context, CalculateCardColumns(Context), _orientation, false));
break;
case RecyclerCardType.Custom:
if (CustomCardUseItemDecoration)
{
_decoration = new DefaultItemDecoration(Context);
recyclerView.AddItemDecoration(_decoration);
}
recyclerView.SetLayoutManager(new LinearLayoutManager(Context));
break;
}
}
protected override void UpdateItemSpacing()
{
if (ItemsLayout == null)
{
return;
}
if (_itemDecoration != null)
{
RemoveItemDecoration(_itemDecoration);
}
_itemDecoration = CreateSpacingDecoration(ItemsLayout);
AddItemDecoration(_itemDecoration);
var adapter = GetAdapter();
if (adapter != null)
{
adapter.NotifyItemChanged(_oldPosition);
Carousel.ScrollTo(_oldPosition, position: Xamarin.Forms.ScrollToPosition.Center);
}
base.UpdateItemSpacing();
}
void UpdatePadding()
{
_recyclerView.SetPadding((int)(Element.ContentPaddingLeft * _density),
(int)(Element.ContentPaddingTop * _density),
(int)(Element.ContentPaddingRight * _density),
(int)(Element.ContentPaddingBottom * _density));
if (Element.IsHorizontal)
{
if (_paddingDecoration != null)
{
_recyclerView.RemoveItemDecoration(_paddingDecoration);
}
var cs = Element.ColumnSpacing;
var rs = Element.RowSpacing;
if (cs > 0 || rs > 0)
{
_paddingDecoration =
new HorizontalSpacesItemDecoration(ConvertDpToPixels((float)cs), ConvertDpToPixels((int)rs));
_recyclerView.AddItemDecoration(_paddingDecoration);
}
}
else
{
UpdateGridLayout();
}
}
void UpdateItemDecoration()
{
if (_itemDecoration != null)
{
RemoveItemDecoration(_itemDecoration);
}
_itemDecoration = CreateSpacingDecoration(ItemsLayout);
AddItemDecoration(_itemDecoration);
}
void UpdateGridLayout()
{
var source = Element.ItemsSource as ICollection;
var numberOfItems = source == null ? 0 : source.Count;
var horizontalPadding = 0;
int numberOfItemsToUse = 1;
if (_layoutManager != null)
{
if (Element.Width > 0)
{
// float width = (float)_recyclerView.Width - 2;
if (Element.IsContentCentered)
{
float width = (float)Element.Width;
int numberOfItemsThatFit = (int)Math.Floor((width) / (Element.ItemWidth + Element.ColumnSpacing));
numberOfItemsToUse = Element.CenterAsFilledRow ? numberOfItemsThatFit : (int)Math.Min(numberOfItemsThatFit, numberOfItems);
if (Element.MaxItemsPerRow != -1)
{
numberOfItemsToUse = Element.MaxItemsPerRow;
}
var remainingWidth = (width - (Element.ContentPaddingLeft + Element.ContentPaddingRight)) - ((numberOfItemsToUse * Element.ItemWidth) + ((numberOfItemsToUse) * (Element.ColumnSpacing)));
horizontalPadding = (int)(remainingWidth / (numberOfItemsToUse + 1));
}
else
{
horizontalPadding = (int)Element.ColumnSpacing;
}
Console.WriteLine(" width {0} items using {1} padding {2} iwdith {3} ", _recyclerView.Width, numberOfItemsToUse, horizontalPadding, Element.ItemWidth);
}
}
var gridLayoutManager = _layoutManager as GridLayoutManager;
if (gridLayoutManager != null)
{
//TODO calculate
gridLayoutManager.SpanCount = Math.Max(1, numberOfItemsToUse);
}
//TODO
if (_paddingDecoration != null)
{
_recyclerView.RemoveItemDecoration(_paddingDecoration);
}
_paddingDecoration = new SpacesItemDecoration(ConvertDpToPixels(horizontalPadding), ConvertDpToPixels((int)Element.RowSpacing),
numberOfItems, numberOfItemsToUse,
ConvertDpToPixels((int)Element.ContentPaddingTop), ConvertDpToPixels((int)Element.ContentPaddingBottom));
// _paddingDecoration = new SpacesItemDecoration (horizontalPadding, (int)Element.RowSpacing,
// numberOfItems, numberOfItemsToUse,
// (int)Element.ContentPaddingTop, (int)Element.ContentPaddingBottom);
_recyclerView.AddItemDecoration(_paddingDecoration);
}
private void SetItemDecoration()
{
if (_isGrid)
{
var space = Activity.Resources.GetDimensionPixelSize(Resource.Dimension.spacing_card_album_grid);
_decoration = new SpacesItemDecoration(space);
}
else
{
_decoration = new DividerItemDecoration(Activity, DividerItemDecoration.Vertical);
}
_recyclerView.AddItemDecoration(_decoration);
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
if (_itemDecoration != null)
{
_itemDecoration.Dispose();
_itemDecoration = null;
}
}
base.Dispose(disposing);
}
protected virtual void UpdateItemSpacing()
{
if (ItemsLayout == null)
{
return;
}
if (_itemDecoration != null)
{
RemoveItemDecoration(_itemDecoration);
}
_itemDecoration = CreateSpacingDecoration(ItemsLayout);
AddItemDecoration(_itemDecoration);
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
if (_itemDecoration != null)
{
_itemDecoration.Dispose();
_itemDecoration = null;
}
ClearLayoutListener();
}
base.Dispose(disposing);
}
protected virtual void UpdateItemSpacing()
{
if (_layout == null)
{
return;
}
if (_itemDecoration != null)
{
RemoveItemDecoration(_itemDecoration);
}
_itemDecoration = new SpacingItemDecoration(_layout);
AddItemDecoration(_itemDecoration);
}
void UpdateGridLayout()
{
if (_paddingDecoration != null)
{
_recyclerView.RemoveItemDecoration(_paddingDecoration);
}
_recyclerView.InvalidateItemDecorations();
var cs = Element.ColumnSpacing;
var rs = Element.RowSpacing;
if (cs > 0 || rs > 0)
{
_paddingDecoration = new HorizontalSpacesItemDecoration(ConvertDpToPixels((int)Element.ColumnSpacing),
ConvertDpToPixels((int)Element.RowSpacing));
_recyclerView.AddItemDecoration(_paddingDecoration);
}
}
void UpdatePadding()
{
_recyclerView.SetPadding((int)Element.ContentPaddingLeft,
(int)Element.ContentPaddingTop,
(int)Element.ContentPaddingRight,
(int)Element.ContentPaddingBottom);
if (Element.IsHorizontal)
{
if (_paddingDecoration != null)
{
_recyclerView.RemoveItemDecoration(_paddingDecoration);
}
_paddingDecoration = new HorizontalSpacesItemDecoration(ConvertDpToPixels((float)Element.ColumnSpacing / 2), ConvertDpToPixels((int)Element.RowSpacing));
_recyclerView.AddItemDecoration(_paddingDecoration);
}
else
{
UpdateGridLayout();
}
}
void UpdatePadding()
{
_recyclerView.SetPadding((int)Element.ContentPaddingLeft,
(int)Element.ContentPaddingTop,
(int)Element.ContentPaddingRight,
(int)Element.ContentPaddingBottom);
if (Element.IsHorizontal)
{
if (_paddingDecoration != null)
{
_recyclerView.RemoveItemDecoration(_paddingDecoration);
}
var source = Element.ItemsSource as ICollection;
var numberOfItems = source == null ? 0 : source.Count;
_paddingDecoration = new HorizontalSpacesItemDecoration(ConvertDpToPixels((float)Element.ColumnSpacing / 2), ConvertDpToPixels((int)Element.RowSpacing));
_recyclerView.AddItemDecoration(_paddingDecoration);
}
else
{
UpdateGridLayout();
}
}
