/// <summary>
/// resets the <see cref="IndexItems"/>
/// </summary>
/// <param name="datacontext"></param>
private void UpdateData(object datacontext)
{
if (datacontext is IEnumerable <IndexItemModel> items)
{
var tempItems = items.OrderBy(x => x.Text, new AlphanumComparatorFast())
.Select(item => item.Text.First())
.Distinct()
.ToDictionary(l => l.ToString(), l => items.Where(x => x.Text.StartsWith(l.ToString())));
foreach (var item in tempItems)
{
IndexItemModel mainIndex = null;
if (char.IsDigit(item.Key.First()))
{
mainIndex = _indexEntries.Where(x => x.Text == "#").FirstOrDefault();
}
else
{
mainIndex = _indexEntries.Where(x => x.Text == item.Key).FirstOrDefault();
}
if (mainIndex == null)
{
Debug.WriteLine($"WARNING: {item.Key} not found");
continue;
}
item.Value.ForEach(it => mainIndex.SubItems.Add(it));
}
var comparer = SortExpressionComparer <IndexItemModel> .Ascending(x => x.Compare(_indexSectionItems));
if (_disposables != null)
{
_disposables.Dispose();
}
var sourceList = new SourceList <IndexItemModel>();
sourceList.AddRange(_indexEntries);
_items = sourceList.Connect();
_items.Filter(_filter)
.Sort(comparer) /*need this here because after filtering the list is incorrect ordered*/
.ObserveOn(RxApp.MainThreadScheduler)
.Bind(out _indexItems)
.DisposeMany()
.Subscribe();
_disposables = new CompositeDisposable(sourceList);
RaisePropertyChanged(IndexItemsProperty, null, _indexItems);
}
}
/// <summary>
/// scrolls the item into the view
/// </summary>
/// <param name="item"></param>
private void ExecutePressedCommand(IndexItemModel item)
{
_contentIndexList.ScrollIntoView(item);
}
