public BookVM AddBookExternal(BookRelation relation)
{
BookVM newBook = AddOrEditBook(null, relation);
if (newBook != null)
{
using (UndoTransaction tx = new UndoTransaction(UndoManager))
{
books.Add(newBook);
StudyUnit.OnRemoveBooks();
tx.Commit();
}
}
return(newBook);
}
public void RemoveBookExternal(BookVM targetBook)
{
if (targetBook == null)
{
return;
}
using (UndoTransaction tx = new UndoTransaction(UndoManager))
{
books.Remove(targetBook);
StudyUnit.OnRemoveBooks();
tx.Commit();
}
if (SelectedBook == targetBook)
{
SelectedBookItem = null;
}
}
public BookVM SelectBookExternal(BookRelation relation)
{
SelectObjectWindowVM <BookVM> vm = new SelectObjectWindowVM <BookVM>(books);
SelectObjectWindow window = new SelectObjectWindow(vm);
BookVM book = SelectObjectWindow.Select(Resources.SelectBook, vm) as BookVM; //Select
if (book != null)
{
using (UndoTransaction tx = new UndoTransaction(UndoManager))
{
if (book.Book.FindRelation(relation) == null)
{
//Need not be generated here since ViewModel Since is re-generated every time EditBookWindow is displayed.
book.Book.BookRelations.Add(relation);
}
StudyUnit.OnRemoveBooks();
tx.Commit();
}
}
return(book);
}
public BookVM EditBookExternal(BookVM targetBook)
{
if (targetBook == null)
{
return(null);
}
BookVM newBook = AddOrEditBook(targetBook.Book, null);
if (newBook != null)
{
using (UndoTransaction tx = new UndoTransaction(UndoManager))
{
int index = books.IndexOf(targetBook);
books.RemoveAt(index);
books.Insert(index, newBook);
StudyUnit.OnRemoveBooks();
tx.Commit();
}
}
return(newBook);
}
