GWT-编辑器和子编辑器

Question

我正在尝试运行一个带有子编辑器的编辑器示例。刷新父级时，子编辑器的值为空。类是Person和Address。主编辑器是：

    // editor fields
public TextField firstname;
public TextField lastname;
public NumberField<Integer> id;

public AddressEditor address = new AddressEditor();

public PersonEditor(Person p){
    asWidget();
}

@Override
public Widget asWidget() {
    setWidth(400);
    setBodyStyle("padding: 5px;");
    setHeaderVisible(false);

    VerticalLayoutContainer c = new VerticalLayoutContainer();

    id = new NumberField<Integer>(new IntegerPropertyEditor());
    // id.setName("id");
    id.setFormat(NumberFormat.getFormat("0.00"));
    id.setAllowNegative(false);
    c.add(new FieldLabel(id, "id"), new VerticalLayoutData(1, -1));

    firstname = new TextField();
    // firstname.setName("firstname");
    c.add(new FieldLabel(firstname, "firstname"), new VerticalLayoutData(1, -1));

    lastname = new TextField();
    lastname.setName("lastname");
    c.add(new FieldLabel(lastname, "lastname"), new VerticalLayoutData(1, -1));

    c.add(address);
    add(c);
    return this;

子编辑器：

public class AddressEditor extends Composite implements Editor<Address> {

private AddressProperties props = GWT.create(AddressProperties.class);
private ListStore<Address> store = new ListStore<Address>(props.key());
ComboBox<Address> address;

public AddressEditor() {
    for(int i = 0; i < 5; i ++)
        store.add(new Address("city" + i));
    address = new ComboBox<Address>(store, props.nameLabel());

    address.setAllowBlank(false);
    address.setForceSelection(true);
    address.setTriggerAction(TriggerAction.ALL);
    initWidget(address);
}

驱动程序就是在这里创建的：

private HorizontalPanel hp;

private Person googleContact;
PersonDriver driver = GWT.create(PersonDriver.class);

public void onModuleLoad() {

    hp = new HorizontalPanel();
    hp.setSpacing(10);

    googleContact = new Person();
    PersonEditor pe = new PersonEditor(googleContact);

    driver.initialize(pe);
    driver.edit(googleContact);

    TextButton save = new TextButton("Save");
    save.addSelectHandler(new SelectHandler() {

        @Override
        public void onSelect(SelectEvent event) {
            googleContact = driver.flush();
            System.out.println(googleContact.getFirstname() + ", " + googleContact.getAddress().getCity());
            if (driver.hasErrors()) {
                new MessageBox("Please correct the errors before saving.").show();
                return;
            }
        }
    });

googleContact.getFirstname()的值已填充，但googleContact.getAddress()始终为空。我错过了什么？

Answer 1

AddressEditor需要映射到Address模型--目前，似乎还没有，除非Address只有一个getter/setter，称为getAddress()和setAddress(Address)，这并没有多大意义。

如果您只需要一个ComboBox<Address> (它已经实现了Editor<Address> )，那么可以考虑将该组合直接放入PersonEditor中。否则，您将需要将@Path("")添加到AddressEditor.address字段，以指示它应该直接编辑值本身，而不是子属性(即person.getAddress().getAddress())。

构建地址编辑器的另一种方法是在AddressEditor中列出Address类型的每个属性。这是驱动程序默认情况下所期望的，所以当它看到名为“address”的字段时，它会感到困惑。

关于代码本身的两个快速想法:不需要将一个人传递到PersonEditor中-这是驱动程序本身的工作。其次，您的编辑器字段不需要为public，它们不能为private。