| | 40 | When a new book is created the dialog is displayed with default values for its fields. |
| | 41 | If the user clicks ok a new book is created with the valued of the fields in the BookPropertiesDialog. |
| | 42 | Otherwise no book is created. |
| | 43 | If you display the dialog when the book is already opened it should display the information about it and allow editing it. |
| | 44 | |
| | 45 | A new class BookInfo is created with three value properties in order to keep the values of the book info. If a new book is created new instance of the BookInfo class is created with default values for its fields. Otherwise the new instance of the BookInfo class holds the properties of the current book. |
| | 46 | If a new book is created the book properties dialog appears and if the user clicks cancel the getInfo method in BookInfo class returns null and a new book is not created, if the user clicks ok, getInfo method returns an instance of the BookInfo class and a new book with the desired prperties is created. |
