TableView，设置可编辑单元格

Question

我尝试使表格单元格可编辑。我设法用两个包含字符串值的列来做到这一点，但我不能用代表整数值的列来做到这一点。

带有 X 的地方是编译器出错的地方：

The method setCellFactory(Callback<TableColumn<DataModel,Integer>,TableCell<DataModel,Integer>>) in the type TableColumn<DataModel,Integer> is not applicable for the arguments  (Callback<TableColumn<DataModel,String>,TableCell<DataModel,String>>)

带有 XX 的地方是编译器出错的地方：

The method setOnEditCommit(EventHandler<TableColumn.CellEditEvent<DataModel,Integer>>) in the type TableColumn<DataModel,Integer> is not applicable for the arguments ((CellEditEvent<DataModel, Integer> event) -> {})

代码如下：

public void initialize(URL location, ResourceBundle resources) {
    //Tworzymy sobie kolumny, które będą odpowiadać oraz przyjmować konretne dane
    TableColumn<DataModel, String> nameColumn = new TableColumn<DataModel, String>("Name");
    nameColumn.setMinWidth(100);
    TableColumn<DataModel, String> surnameColumn = new TableColumn<DataModel, String>("Surname");
    surnameColumn.setMinWidth(100);
    TableColumn<DataModel, Integer> ageColumn = new TableColumn<DataModel, Integer>("Age");
    ageColumn.setMinWidth(100);
    TableColumn<DataModel, Integer> telNumberColumn = new TableColumn<DataModel, Integer>("Tel. Number");
    telNumberColumn.setMinWidth(100);

    //dodajemy kolumny do okna
    tableView.getColumns().addAll(nameColumn,surnameColumn,ageColumn,telNumberColumn);

    //podajemy nazwy zmiennych, których wartości mają się wyświetlać w poszczególnych kolumnach
    nameColumn.setCellValueFactory(new PropertyValueFactory<>("sName"));
    surnameColumn.setCellValueFactory(new PropertyValueFactory<>("sSurname"));
    ageColumn.setCellValueFactory(new PropertyValueFactory<>("iAge"));
    telNumberColumn.setCellValueFactory(new PropertyValueFactory<>("iPhoneNumber"));

    //Sprawiamy że poszczególne kolumny stają się edytowalne
    nameColumn.setCellFactory(TextFieldTableCell.<DataModel>forTableColumn());
    nameColumn.setOnEditCommit((CellEditEvent<DataModel, String> event) -> {
        ((DataModel) event.getTableView().getItems(). get(event.getTablePosition().getRow())).  setsName(event.getNewValue());
    });
    surnameColumn.setCellFactory(TextFieldTableCell.<DataModel>forTableColumn());
    surnameColumn.setOnEditCommit((CellEditEvent<DataModel, String> event) -> {
        ((DataModel) event.getTableView().getItems(). get(event.getTablePosition().getRow())).  setsSurname(event.getNewValue());
    });
X   ageColumn.setCellFactory(TextFieldTableCell.<DataModel>forTableColumn());
XX  ageColumn.setOnEditCommit((CellEditEvent<DataModel, Integer> event) -> {
    //    ((DataModel) event.getTableView().getItems(). get(event.getTablePosition().getRow())).  setiAge(Integer.valueOf(event.getNewValue()));

    });
X   telNumberColumn.setCellFactory(TextFieldTableCell.<DataModel>forTableColumn());
XX  telNumberColumn.setOnEditCommit((CellEditEvent<DataModel, Integer> event) -> {
 //         ((DataModel) event.getTableView().getItems(). get(event.getTablePosition().getRow())).  setiPhoneNumber(Integer.valueOf(event.getNewValue()));

    });

    tableView.setPlaceholder(new Label("Pust tabelka!"));//jaki element dodać jeśli tabelka nie jest wyświetlona
    tableView.setEditable(true);

    tableView.setItems(dataList); //wczytujemy dane do przygotowanej tabelki

    buttAdd.setOnAction((ActionEvent e) -> {
        buttAddAction(e);
    });
}

我正在学习oracle TableView 教程，而且难度很大。帮助。

Answer 1

问题在于TextFieldTableCell.forTableColumn() 被键入为字符串值。查看默认实现：

public static <S> Callback<TableColumn<S,String>, TableCell<S,String>> forTableColumn() {
    return forTableColumn(new DefaultStringConverter());
}

您需要的是带有IntegerStringConverter 的TextFieldTableCell，例如：

ageColumn.setCellFactory(TextFieldTableCell.<DataModel, Integer>forTableColumn(new IntegerStringConverter()));

Answer 2

我搜索了很多答案，并借用/扩展/合并到此解决方案。当焦点从已编辑的单元格移动时，将提交编辑。对于可以在表中表示的每种数据类型，我都有一个公共类：EditingTextCell、EditingIntegerCell 等。只要将数据表示为访问要显示的数据的类的可观察列表，这些公共类就可以应用于任何表作为属性。我发布此解决方案是因为我面临为我的应用程序中每个表的每一列创建一个类。目前，双值和组合框单元格版本与特定表格的特定列相关联。如果时间允许，我会做一个通用的版本。请原谅我没有提供源链接——我在阅读它们时忘记给它们添加书签了。

Java 文档表明即将推出更简单的方法。

整数字段的用法示例：

    TableColumn<Factor, Number> noLevelsCol =
            new TableColumn<>("No. Levels");
    noLevelsCol.setCellValueFactory(
            new PropertyValueFactory("numberLevels"));
    noLevelsCol.setMinWidth(40);
    noLevelsCol.setCellFactory(col -> new EditingIntegerCell<>());
    noLevelsCol.setOnEditCommit((CellEditEvent<Factor, Number> t) -> {
        ((Factor) t.getTableView().getItems().get(
                t.getTablePosition().getRow())
                ).setNumberLevels(t.getNewValue().intValue());
    });

字符串字段的用法示例：

    TableColumn<Factor, String> nameCol = new TableColumn<>("Name");
    nameCol.setMinWidth(60);
    nameCol.setCellValueFactory(
          new PropertyValueFactory("factorName"));
    nameCol.setCellFactory(cellFactory);
    nameCol.setOnEditCommit((CellEditEvent<Factor, String> t) -> {
        ((Factor) t.getTableView().getItems().get(
                t.getTablePosition().getRow())
                ).setFactorName(t.getNewValue());
    });

Factor类的定义： 公共类因素 {

private final IntegerProperty factorID = new SimpleIntegerProperty();
public IntegerProperty getFactorID() {     return factorID;    }

private StringProperty factorName = new SimpleStringProperty();
public void setFactorName(String value) {
           factorNameProperty().set(value); }
public String getFactorName() { return factorNameProperty().get(); }
public StringProperty factorNameProperty() { 
    if (factorName == null) factorName = 
        new SimpleStringProperty(this, "factorName");
    return factorName; 
}

private IntegerProperty numberLevels = new SimpleIntegerProperty();
public void setNumberLevels(int value) {
         numberLevelsProperty().set(value); }
public IntegerProperty getNumberLevels() { return numberLevels;    }
public IntegerProperty numberLevelsProperty() { 
    if (numberLevels == null) numberLevels =
          new SimpleIntegerProperty(this, "numberLevels");
    return numberLevels; 
}

private StringProperty listOfLevels = new SimpleStringProperty();
public void setListOfLevels(String value) {
         listOfLevelsProperty().set(value); }
public String getListOfLevels() { return listOfLevelsProperty().get(); }
public StringProperty listOfLevelsProperty() { 
    if (listOfLevels == null) listOfLevels = 
          new SimpleStringProperty(this, "listOfLevels");
    return listOfLevels; 
}


// Constructors
public Factor(int factorID, String factorName) {
    this.factorID.set(factorID);
    this.factorName.set(factorName);
    this.numberLevels.set(1);
    this.listOfLevels.set("-1, 1");
}

public Factor(int factorID, String factorName, int numberLevels,
                String listOfLevels) {
    this.factorID.set(factorID);
    this.factorName.set(factorName);
    this.numberLevels.set(numberLevels);
    this.listOfLevels.set(listOfLevels);
}

@Override
public String toString() {
    return "Factor{" + "factorName=" + factorName + '}';
}

public String[] getLevels() {
    return listOfLevels.getValue().split(",");
}

}

将数据加载到表格中 最终 ObservableList 因子列表 = FXCollections.observableArrayList( 新因子（1，“因子 1”，2，“-1，1”） );

    factorTableView.setEditable(true);
    factorTableView.getColumns().clear();
    factorTableView.setItems(factorList);
    boolean addAll;
    addAll = factorTableView.getColumns().addAll(idCol,
                   nameCol, noLevelsCol, levelsCol);

EditingIntegerCell 类 公共类 EditingIntegerCell 扩展 TableCell {

    private TextField textField;
    private final Pattern intPattern = Pattern.compile("-?\\d+");

    public EditingIntegerCell() {
    }

    @Override
    public void startEdit() {
        if (!isEmpty()) {
            super.startEdit();
            createTextField();
            setText(null);
            setGraphic(textField);
            textField.selectAll();
        }
    }

    @Override
    public void cancelEdit() {
        super.cancelEdit();

        setText((String) getItem().toString());
        setGraphic(null);
    }

    @Override
    public void updateItem(Number item, boolean empty) {
        super.updateItem(item, empty);

        if (empty) {
            setText(null);
            setGraphic(null);
        } else {
            if (isEditing()) {
                if (textField != null) {
                    textField.setText(getString());
                }
                setText(null);
                setGraphic(textField);
            } else {
                setText(getString());
                setGraphic(null);
            }
        }
    }

    private void createTextField() {
        textField = new TextField(getString());
        textField.setMinWidth(this.getWidth() - this.getGraphicTextGap()* 2);
        textField.focusedProperty().addListener(
            (ObservableValue<? extends Boolean> arg0, Boolean arg1, Boolean arg2) 
                        -> {
            if (!arg2) {
                processEdit();
            }
        });
    }

    private void processEdit() {
        String text = textField.getText();
        if (intPattern.matcher(text).matches()) {
            commitEdit(Integer.parseInt(text));
        } else {
            cancelEdit();
        }
    }

    private String getString() {
        return getItem() == null ? "" : getItem().toString();
    }
}

** EditingTextCell 类 ** 公共类 EditingTextCell 扩展 TableCell {

    private TextField textField;

    public EditingTextCell() {
    }

    @Override
    public void startEdit() {
        if (!isEmpty()) {
            super.startEdit();
            createTextField();
            setText(null);
            setGraphic(textField);
            textField.selectAll();
        }
    }

    @Override
    public void cancelEdit() {
        super.cancelEdit();

        setText((String) getItem());
        setGraphic(null);
    }

    @Override
    public void updateItem(String item, boolean empty) {
        super.updateItem(item, empty);

        if (empty) {
            setText(null);
            setGraphic(null);
        } else {
            if (isEditing()) {
                if (textField != null) {
                    textField.setText(getString());
                }
                setText(null);
                setGraphic(textField);
            } else {
                setText(getString());
                setGraphic(null);
            }
        }
    }

    private void createTextField() {
        textField = new TextField(getString());
        textField.setMinWidth(this.getWidth() - this.getGraphicTextGap()* 2);
        textField.focusedProperty().addListener(
            (ObservableValue<? extends Boolean> arg0, Boolean arg1, Boolean arg2) 
                        -> {
            if (!arg2) {
                commitEdit(textField.getText());
            }
        });
    }

    private String getString() {
        return getItem() == null ? "" : getItem();
    }
}