Question

我有一个可观察的列表，保存了Author对象。 gui可以将作者添加到我的数据库中。可观察列表包含数据库的所有对象。如果要在数据库中添加作者，我希望表自动更新。

我已经尝试使用table.refresh（）刷新列表。我也正在考虑对可观察列表使用更改侦听器。

这里是创建表的代码。 authorList是一个可观察的列表。我想我不太了解如何使用可观察列表。我的建议是，通过使用“ table.setItem（authorList）”，如果列表中的某些内容发生更改，我的表将自动更新其条目。显然不是这样。

    private void createAuthorsTablePane() {

        // TODO: Layout ändern

        GridPane authorGridPane = new GridPane();

        // create table
        TableView<Author> table = new TableView<>();

        // Create columns with title
        TableColumn<Author, String> idColumn = new TableColumn<>("ID");
        TableColumn<Author, String> nameColumn = new TableColumn<>("Name");
        TableColumn<Author, String> emailColumn = new TableColumn<>("Email");
        TableColumn<Author, String> publicationsColumn = new TableColumn<>("Publications");

        // Add columns to table node
        table.getColumns().add(idColumn);
        table.getColumns().add(nameColumn);
        table.getColumns().add(emailColumn);
        table.getColumns().add(publicationsColumn);

        // Bindings
        PropertyValueFactory<Author, String> idColumnFactory = new PropertyValueFactory<>("id");
        PropertyValueFactory<Author, String> nameColumnFactory = new PropertyValueFactory<>("name");
        PropertyValueFactory<Author, String> emailColumnFactory = new PropertyValueFactory<>("email");
        PropertyValueFactory<Author, String> publicationsColumnFactory = new PropertyValueFactory<>("publications");

        idColumn.setCellValueFactory(idColumnFactory);
        nameColumn.setCellValueFactory(nameColumnFactory);
        emailColumn.setCellValueFactory(emailColumnFactory);
        publicationsColumn.setCellValueFactory(publicationsColumnFactory);

        table.setItems(authorList);

        // Create Buttons
        createAuthorButton = new Button("Create author");

        createAuthorButton.setOnAction(new EventHandler<ActionEvent>() {
            public void handle(ActionEvent event) {
                mainController.createAuthorController();

            }
        });

        deleteAuthorButton = new Button("Delete selected author");

        // Add Nodes to Pane
        authorGridPane.add(new Label("Authors"), 0, 0);
        authorGridPane.add(table, 0, 1);
        authorGridPane.add(deleteAuthorButton, 0, 2);
        authorGridPane.add(createAuthorButton, 1, 2);

        authorPane = authorGridPane;

    }

这是我在其中创建我的authorList的类。我正在使用控制器在创建表的类中注册列表。

public class ObservableModel {
    private ObservableList<Publication> publicationList;
    private ObservableList<Author> authorList;

    public ObservableModel(DatabaseService database) {
        publicationList = FXCollections.observableList(database.getPublications());
        authorList = FXCollections.observableList(database.getAuthors());

    }

    public ObservableList<Publication> getPublicationList() {
        return publicationList;
    }

    public ObservableList<Author> getAuthorList() {
        return authorList;
    }

}

Answer 1

TableView<Author> table = new TableView<>();
private ObservableList<Author> authorList = FXCollections.observableArrayList();
private Property<ObservableList<Author>> authorListProperty = new SimpleObjectProperty<>(authorList);

table.itemsProperty().bind(authorListProperty); // The Binding

每次更改authorList时，表视图也会被更新

Answer 2

 idcolumnFactory.setCellValueFactory(cellData -> cellData.getValue().getIdProperty());

或者如果您声明简单的bean

 idcolumnFactory.setCellValueFactory(cellData -> new SimpleStringProperty(cellData.getValue().getId()));

不要忘记

  table.setItems(your_observale_list);

将TableView绑定到ObservableList

2 个答案: