private async Task InitializeCollectionView()
{
UINib nib = UINib.FromName(SaleItemViewCell.Key, null);
SaleItemsCollectionView.RegisterNibForCell(nib, SaleItemViewCell.Key);
nib = UINib.FromName(SellArticleButtonViewCell.Key, null);
SaleItemsCollectionView.RegisterNibForCell(nib, SellArticleButtonViewCell.Key);
saleItemsSource = new SaleItemsDataSource();
saleItemsSource.SellRequestedCallback = OnSellRequested;
saleItemsSource.SaleItemSelectedCallback = OnSaleItemSelected;
SaleItemsCollectionView.Source = saleItemsSource;
await SaleItemDataService.Instance.Initialize();
// As each item image download may occur after its cell is loaded,
// we should reload it when that download is completed
SaleItemDataService.Instance.MobileService.EventManager
.Subscribe <FileDownloadedEvent>(file =>
{
SaleItemsCollectionView.BeginInvokeOnMainThread(() =>
{
var targetCell = SaleItemsCollectionView.VisibleCells
.OfType <SaleItemViewCell>()
.FirstOrDefault(c => c.ItemId == file.Name);
if (targetCell != null)
{
NSIndexPath path = SaleItemsCollectionView.IndexPathForCell(targetCell);
SaleItemsCollectionView.ReloadItems(new[] { path });
}
});
});
}
private async Task LoadSaleItems()
{
UserDialogs.Instance.ShowLoading("Loading...");
IEnumerable <SaleItem> data = await SaleItemDataService.Instance.GetSaleItems();
saleItemsSource.Items = data;
SaleItemsCollectionView.ReloadData();
UserDialogs.Instance.HideLoading();
}
