如何使用 javafx/scene builder 将对象的链接列表添加到 TableView？

Question

我正在开发一个相当简单的 javafx 应用程序，它有几个不同的场景，我的第一个场景是将 Show 对象添加到通用链表中，然后在第二个场景中添加其中一个节目的表演。对象（例如在节目中添加日场或晚间表演 Annie）

我已经创建了第一个场景并且可以将 Show 对象添加到链接列表中，但是我无法使用创建的节目填充第二个场景中的 tableview 以供用户选择和添加表演

这是我添加的显示控制器的样子：

public class AddShowController {

    @FXML private TextField titleField;
    @FXML private TextField cirField,stlField, balField;
    @FXML private Slider runTimeSlider;
    @FXML private DatePicker startDatePicker, endDatePicker;
    TheLinkedList<Show> showList = new TheLinkedList<>();

    private static AddShowController instance;

    public AddShowController() {
        instance = this;
    }

    public static AddShowController getInstance(){
        return instance;
    }

    public void addShowButtonPushed (ActionEvent e){

        showList.addElement(new Show (titleField.getText(),
                                (int) runTimeSlider.getValue(),
                                startDatePicker.getValue().toString(),
                                endDatePicker.getValue().toString(),
                                cirField.getText(),
                                stlField.getText(),
                                balField.getText()));
}

如您所见，我已尝试创建控制器实例，以便可以从添加性能控制器访问链接列表，但没有任何乐趣。

这是添加性能控制器：

public class AddPerfController {

    @FXML private ChoiceBox perfTimeChoiceBox;

    @FXML private TableView<Show> showTable;
    @FXML private TableColumn<Show, String> titleColumn;
    @FXML private TableColumn<Show, String> runTimeColumn;
    @FXML private TableColumn<Show, String> startDateColumn;
    @FXML private TableColumn<Show, String> endDateColumn;
    @FXML private TableColumn<Show, String> cirTicketPriceColumn;
    @FXML private TableColumn<Show, String> stlTicketPriceColumn;
    @FXML private TableColumn<Show, String> balTicketPriceColumn;

    private ObservableList<Show> showData = FXCollections.observableList(AddShowController.getInstance().showList);

    public void initialize() {
        perfTimeChoiceBox.getItems().addAll("Matinee","Evening");
        perfTimeChoiceBox.setValue("Matinee");

        titleColumn.setCellValueFactory(new PropertyValueFactory<>("title"));
        runTimeColumn.setCellValueFactory(new PropertyValueFactory<>("runningTime"));
        startDateColumn.setCellValueFactory(new PropertyValueFactory<>("startDate"));
        endDateColumn.setCellValueFactory(new PropertyValueFactory<>("endDate"));
        cirTicketPriceColumn.setCellValueFactory(new PropertyValueFactory<>("cirTicketPrice"));
        stlTicketPriceColumn.setCellValueFactory(new PropertyValueFactory<>("stlTicketPrice"));
        balTicketPriceColumn.setCellValueFactory(new PropertyValueFactory<>("balTicketPrice"));

        showData.add(new Show("Annie", 100,"12/12/2019", "14/12/2019","10","15", "20"));
        showTable.setItems(showData);

    }

Answer 1

我们不确定这是你想要做的，但看看逻辑
我们使用的是模型视图控制器，因为我们的数据在数据库中
这就是我们填充名为 ctable 的表格的方式，而不是创意

    private void ReadFromChild() throws SQLException{

ObservableList<ChildModel> TableData = FXCollections.observableArrayList();
    stmnt = conn.createStatement();

    ResultSet rs = stmnt.executeQuery("SELECT * FROM Child WHERE cMonth ='"+strMONTH+"'AND cYear ='"+strYEAR+"'" );//works);
    while (rs.next()){// Add data to observableArrayList TableData to select a table ROW

    TableData.add(new ChildModel(rs.getString("CID"),rs.getString("cDisplayDate"),rs.getString("cTitle")));
    displayDATE = rs.getString("cDisplayDate");
    }
    PropertyValueFactory<ChildModel, String> IDCellValueFactory = new PropertyValueFactory<>("CID");
    colID.setCellValueFactory(IDCellValueFactory);
    PropertyValueFactory<ChildModel, String> DateCellValueFactory = new PropertyValueFactory<>("cDisplayDate");
    colDD.setCellValueFactory(DateCellValueFactory);
    PropertyValueFactory<ChildModel, String> TypeCellValueFactory = new PropertyValueFactory<>("cTitle");
    colTitle.setCellValueFactory(TypeCellValueFactory);

    Collections.sort(TableData, (p2, p1)-> p1.getCID().compareToIgnoreCase(p2.getCID()));
    // Line of Code above Sorts Database Columns based on VARIABLE in ChildModel
    // Change p2,p1 to sort Ascending or Descending
    if(TableData.size() < 15) {// Format TableView to display Vertical ScrollBar
        ctable.setPrefWidth(746);// 19 is the off set
    }else {
        ctable.setPrefWidth(765);
    }   ctable.setItems(TableData);
    stmnt.close();  
}

好的，当我们点击表格中的一行时，我们会转到另一个控制器，这里是该控制器的代码

    private void toDetailView() throws IOException{
    stage = (Stage)childTVPane.getScene().getWindow();// pane you are ON
    detailviewPane = FXMLLoader.load(getClass().getResource("detailview.fxml"));// pane you are GOING TO
    Scene scene = new Scene(detailviewPane);// pane you are GOING TO
    scene.getStylesheets().add(getClass().getResource("diary.css").toExternalForm());
    stage.setScene(scene);
    stage.setTitle("Diary Entry for "+displayDATE); 
    stage.show();
    stage.sizeToScene();
    stage.centerOnScreen(); 
}

private void showTableDataDetails(ChildModel info) throws IOException{
    if (info != null) {
       info =  (ChildModel) ctable.getSelectionModel().getSelectedItem();
       String str = info.getCID();
       strID = Integer.valueOf(str);
       toDetailView();
    }
}

@Override
public void initialize(URL url, ResourceBundle rb) {

    ctable.getSelectionModel().selectedItemProperty().addListener((ObservableValue<? extends ChildModel>
        observable,ChildModel oldValue, ChildModel newValue) -> {
        try {
            showTableDataDetails((ChildModel) newValue); // When a row of the table is Selected call
            // Proper Construction                   // showTableDataDetails method
        } catch (IOException ex) {
            Logger.getLogger(ParentTableViewController.class.getName()).log(Level.SEVERE, null, ex);
        }
    });
}  

Answer 2

这不是最好的解决方案，但它解决了我的问题，只是想更新这个问题。

我将 LinkedList 移至 Main 类，并将其设为 public static 以便从两个控制器访问它

public static TheLinkedList<Show> showList = new TheLinkedList<>();

为了使用 ObservableList，我在 TheLinkedList 类中使用以下方法将 LinkedList 转换为 arrayList

    public  Show[] getShowList(){
        Show[] newShows = new Show[counter];

        sample.Node temp = Main.showList.getHead();
        for(int i = 0; i<counter;i++ ){
            newShows[i] = (Show)temp.getData();
            temp = temp.getNext();
        }
        return newShows;
    }

    public void initialize() {
    showData = FXCollections.observableArrayList((Main.showList.getShowList()));
     (column data) .......
    showTable.setItems(showData);

}