public void BookChanged(object sender, BookEventArgs e)
{
if (e.Book == null)
{
return;
}
switch (e.State)
{
case BookEventArgs.BookState.Added:
var bookExistsAdded =
FilteredBooks.Any(
b =>
b.Id
== e.Book.Id);
if (!bookExistsAdded)
{
FilteredBooks.Add(e.Book);
}
NotifyPropertyChanged("FilterCount");
break;
case BookEventArgs.BookState.Removed:
var bookExistsRemoved =
FilteredBooks.Any(
b =>
b.Id
== e.Book.Id);
if (bookExistsRemoved)
{
FilteredBooks.Remove(e.Book);
}
NotifyPropertyChanged("FilterCount");
break;
case BookEventArgs.BookState.Updated: //Remove book from list and re-add it
var bookExistsUpdated =
FilteredBooks.FirstOrDefault(
b =>
b.FullPathAndFileName
== e.Book.FullPathAndFileName);
if (bookExistsUpdated != null)
{
var index = FilteredBooks.IndexOf(bookExistsUpdated);
FilteredBooks.RemoveAt(index);
FilteredBooks.Insert(index, e.Book);
}
else
{
FilteredBooks.Add(e.Book);
}
NotifyPropertyChanged("FilterCount");
break;
}
// FilteredBooks = new ObservableCollection<Book>(AllBooks);
}
internal ObservableCollection <Book> FilterByTitleNotGrouped(string filterQuery)
{
var result = FilteredBooks.Where(x => x.Title.Contains(filterQuery)).ToList();
return(new ObservableCollection <Book>(result));
}
