public async void Toc()
{
ITocItem item = await book.QueryToc(null, Enumerable.Empty <ICategoryItem>());
Assert.NotNull(item);
Assert.Equal(2, item.Children.Count());
}
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if (value is ObservableCollection <ITocItem> items && items.Any())
{
ITocItem item = items.First();
if (item.Level == 0)
{
return(ImageSource.FromFile(Device.RuntimePlatform == Device.Android
? "@drawable/ic_filter_none_white_24dp"
: null));
}
if (item.Level > 9)
{
return(ImageSource.FromFile(Device.RuntimePlatform == Device.Android
? "@drawable/ic_filter_9_plus_white_24dp.png"
: null));
}
return(ImageSource.FromFile(Device.RuntimePlatform == Device.Android
? $"@drawable/ic_filter_{item.Level}_white_24dp.png"
: null));
}
return(null);
}
public async Task Init()
{
if (!TocItems.Any())
{
ITocItem root = await Book.QueryToc(null, null);
ListChildren(root);
}
}
private void ListChildren(ITocItem item)
{
TocItems.ReplaceRange(item.HasChildren ? item.Children : new ITocItem[] { item });
OnPropertyChanged(nameof(TocItems));
}
