Question

我尝试使表格单元格可编辑。我设法用两个包含String值的Collumns来做这个，但是我不能用表示Integer值的列来做这个。

带X的地方是编译器收到错误的地方：

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>>)

和XX的地方是编译器得到错误的地方：

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

下面是代码：

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);
    });
}

我正在服用oracle TableView教程，而且相当困难。帮助

Answer 1

问题是TextFieldTableCell.forTableColumn()被输入到String值。请参阅默认实现：

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

您需要的是TextFieldTableCell IntegerStringConverter，例如：

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

Answer 2

我搜索了很多答案，并且已经借用/扩展/合并到此解决方案中。当焦点从编辑的单元格移动时，将提交编辑。我有一个可以在表中表示的每种数据类型的公共类：EditingTextCell，EditingIntegerCell等。这些公共类可以应用于任何表，前提是数据表示为访问要显示的数据的类的可观察列表作为属性。我发布此解决方案是因为我面临为应用程序中每个表的每列创建一个类。目前，double值和组合框单元版本与特定表的特定列相关联。在时间允许的情况下，我会做这些的通用版本。请原谅我没有提供源链接 - 我忘了给它们添加书签，因为我仔细阅读了它们。

Java文档表明，即将采用更简单的方法。

整数字段的示例用法：

    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());
    });

字符串字段的示例用法：

    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());
    });

因子类的定义： 公共阶层因素{

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 最终的ObservableList factorList = FXCollections.observableArrayList（新因子（1，＆＃34;因子1＆＃34;，2，＆＃34; -1,1＆＃34;））;

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

EditingIntegerCell类 public class EditingIntegerCell扩展了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** public class EditingTextCell扩展了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();
    }
}

TableView，设置可编辑单元格

2 个答案: