void SpreadSheetViewModel_PropertyChanged(object sender, PropertyChangedEventArgs e)
{
if (e.PropertyName == "Authorized")
{
if (Authorized)
{
_database = new SpreadSheetDB(GoogleOAuth2LoginViewModel.OAuth2);
ThreadStart start = delegate()
{
ObservableCollection<BookViewModel> sheets = null;
try
{
Synchronizing = true;
_database.Init();
sheets = _database.RetrieveSpreadsheet();
}
catch (System.Exception ex)
{
Console.WriteLine(ex.Message);
}
if (Application.Current != null)
{
Application.Current.Dispatcher.Invoke(DispatcherPriority.Normal,
new Action(() =>
{
if (sheets != null)
{
// deep copy of collection's items created from different thread
foreach (var bookitem in sheets)
{
BookViewModel book = new BookViewModel(_database, bookitem.BookTitle, bookitem.Entry);
book.Book.CollectionChanged += book.VocaViewModel_PropertyChanged;
foreach (var vocaitem in bookitem.Book)
{
book.Book.Add(vocaitem);
}
this.SpreadSheet.Add(book);
}
// move focus to the last
ICollectionView vs = CollectionViewSource.GetDefaultView(this.SpreadSheet);
vs.MoveCurrentToLast();
}
Synchronizing = false;
}));
}
};
new Thread(start).Start();
}
else
{
}
}
}