In my Vaadin application I have a dialog that creates a filter to search for books. As a result I am creating a Filter bean that looks like this:
public class Filter implements Serializable {
private Author author;
private String country;
private LocalDate postingDate;
private int fromYear;
private int toYear;
private Set<Tag> tags;
// setters and getters are omitted
}
And my dialog looks like this:
@Component
public class FilterPanel extends Dialog {
private static final Logger LOG = LoggerFactory.getLogger(FilterPanel.class);
private Filter filter;
private ComboBox<Author> authorField;
private ComboBox<String> countryField;
private DatePicker postingDateField;
private TextField fromYear;
private TextField toYear;
private TextField centuryField;
private MultiSelectComboBox<Tag> tagField;
private Button doneButton;
private Binder<Filter> binder;
@Autowired
ApiBookUtils api;
...
}
I have the following binding:
private void bindFields() {
this.binder = new Binder(Filter.class);
this.binder.bind(authorField, Filter::getAuthor, null);
this.binder.forField(countryField).bind(Filter::getCountry, Filter::setCountry);
this.binder.forField(fromYear).withConverter(new StringToIntegerConverter("Not a number"))
.bind(Filter::getFromYear, Filter::setFromYear);
this.binder.forField(toYear).withConverter(new StringToIntegerConverter("Not a number"))
.bind(Filter::getToYear, Filter::setToYear);
this.binder.forField(postingDateField).bind(Filter::getPostingDate, Filter::setPostingDate);
this.binder.forField(tagField).bind(Filter::getTags, Filter::setTags);
if(filter != null) {
this.binder.setBean(filter);
this.binder.readBean(filter);
}
}
Comboboxes are populated by following function:
@PostConstruct
private void setDialogItems() {
ItemFilter<Author> authorFilter = (author, filterString)
-> author.getLastName().toLowerCase().startsWith(filterString.toLowerCase());
this.authorField.setItems(authorFilter, api.getAuthors());
this.countryField.setItems(api.getAllCountries());
this.tagField.setItems(api.getAllTags());
}
However, when I open the dialog, all combo-boxes are greyed out and inactive. I did test functions that supply data for these combo boxes and they are working fine. Can someone please explain what I am doing wrong and how to correct it.
Besides that, I have one field that does not belong to this bean. It is a century field. I.e. user can define there say number 17 and it will automatically populate fields fromYear and toYear with values 1600 and 1699 respectively.
I can write the code to do the validation and mentioned above population in ValueChangeListener of the century field but wonder if that can be done using the binder.
