private void UpdateSelectAllFeedItems()
{
var newValue = !SelectedFeedItems.Any() ? false : (SelectedFeedItems.Count == SelectedFeed?.Items.Count ? true : (bool?)null);
if (selectAllFeedItems != newValue)
{
selectAllFeedItems = newValue;
RaisePropertyChanged(nameof(SelectAllFeedItems));
}
}
public void SelectFeedItem(FeedItem feedItemToSelect)
{
if (SelectedFeedItems.Any())
{
SelectedFeedItems.Clear();
}
if (feedItemToSelect != null)
{
SelectedFeedItems.Add(feedItemToSelect);
}
}
private void SelectedFeedItemsCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
SelectedFeedItem = SelectedFeedItems.FirstOrDefault();
UpdateSelectAllFeedItems();
}