public override void WillDisplayCell(UICollectionView collectionView, UICollectionViewCell cell, NSIndexPath indexPath)
{
if ((indexPath.Row >= (ItemsSource.Count() - FromBottomCellStartLoadingIndex)) && MoreCommand != null && MoreCommand.CanExecute(null))
{
MoreCommand.Execute(null);
}
}
public MainPageViewModel(IWebApi webApi)
{
_webApi = webApi;
MoreCommand.Subscribe(async _ =>
{
foreach (var book in await GetData())
{
Books.Add(book);
}
});
PrevCommand.Subscribe(_ =>
{
if (Position.Value > 0)
{
Position.Value--;
}
});
NextCommand.Subscribe(_ =>
{
if (Position.Value < Books.Count - 1)
{
Position.Value++;
}
});
}
private async void InvokeMore()
{
if (!isBusy)
{
isBusy = true;
if (MoreContent != null)
{
MoreContent(this, EventArgs.Empty);
}
if (MoreCommand != null && MoreCommand.CanExecute(default(object)))
{
await MoreCommand.Execute(default(object));
}
isBusy = false;
}
}
