如何从嵌套TableColumn访问父值

Question

我有一个表(TableView)，其中经常重复一组列(例如，姓名和地址)。我将这些列分组为公共列的子列。

<TableColumn text="Получател">
    <columns>
        <TableColumn text="ЕИК"/>
        <TableColumn text="ЗДДС №"/>
        <TableColumn text="Име"/>
        <TableColumn text="Адрес"/>
        <TableColumn text="Материално отговорно лице"/>
        <TableColumn text="Получател"/>
    </columns>
</TableColumn>

我将这组列导出到用户控件。

<fx:root type="com.example.CompanyTableColumn" xmlns="http://javafx.com/javafx" xmlns:fx="http://javafx.com/fxml"
         text="${controller.name}">

    <columns>
        <TableColumn fx:id="eikColumn" text="ЕИК"/>
        <TableColumn fx:id="vatColumn" text="ЗДДС №"/>
        <TableColumn fx:id="nameColumn" text="Име"/>
        <TableColumn fx:id="addressColumn" text="Адрес"/>
        <TableColumn text="Материално отговорно лице"/>
    </columns>

</fx:root>

public class CompanyTableColumn extends TableColumn<Invoice, Company> {

    @FXML
    private TableColumn<Invoice, String> eikColumn;

    @FXML
    private TableColumn<Invoice, String> vatColumn;

    @FXML
    private TableColumn<Invoice, String> nameColumn;

    @FXML
    private TableColumn<Invoice, String> addressColumn;

    private StringProperty name = new SimpleStringProperty();

    public CompanyTableColumn() {
        try {
            FXMLLoader loader = new FXMLLoader();
            loader.setLocation(getClass().getResource("/com/example/table_column_company.fxml"));
            loader.setRoot(this);
            loader.setController(this);

            loader.load();
        }
        catch (IOException e) {
            e.printStackTrace();
        }
    }

    @FXML
    private void initialize() {
        
    }

    public String getName() {
        return name.get();
    }

    public StringProperty nameProperty() {
        return name;
    }

    public void setName(String name) {
        this.name.set(name);
    }
}

初始化用户控件，如下所示

<TableView fx:id="tableView">
    <columns>
        <CompanyTableColumn fx:id="supplierColumn" name="Доставчик"/>
        <CompanyTableColumn fx:id="receiverColumn" name="Получател"/>
    <columns>
</TableView>

supplierColumn.setCellValueFactory(cdf -> new SimpleObjectProperty<>(cdf.getValue().getSupplier()));
receiverColumn.setCellValueFactory(cdf -> new SimpleObjectProperty<>(cdf.getValue().getReceiver()));

我的问题来了。在本例中，两个控件必须可视化来自Company模型不同实例的数据。我通过创建一个CellValueFactory来提交各种实例，但是我不知道如何访问CompanyTableColumn中的特定值，所以我可以在创建嵌套列值的工厂中使用它。

编辑

与往常一样，问题提出后不久就找到了解决办法：

@FXML
private void initialize() {
    eikColumn.setCellValueFactory(cdf -> new SimpleStringProperty(getCellObservableValue(cdf.getValue()).getValue().getEik()));
    vatColumn.setCellValueFactory(cdf -> new SimpleStringProperty(getCellObservableValue(cdf.getValue()).getValue().getVat()));
    nameColumn.setCellValueFactory(cdf -> new SimpleStringProperty(getCellObservableValue(cdf.getValue()).getValue().getName()));
    addressColumn.setCellValueFactory(cdf -> new SimpleStringProperty(getCellObservableValue(cdf.getValue()).getValue().getAddress()));
}

Answer 1

我找到的解决方案包括使用与表中相应行对应的值作为参数调用TableColumn::getCellObservableValue (由回调函数中的CellDataFeatures对象返回以生成值)。

public class CompanyTableColumn extends TableColumn<Invoice, Company> {

    @FXML
    private TableColumn<Invoice, String> eikColumn;

    @FXML
    private TableColumn<Invoice, String> vatColumn;

    @FXML
    private TableColumn<Invoice, String> nameColumn;

    @FXML
    private TableColumn<Invoice, String> addressColumn;

    private StringProperty name = new SimpleStringProperty();

    public CompanyTableColumn() {
        try {
            FXMLLoader loader = new FXMLLoader();
            loader.setLocation(getClass().getResource("/com/example/table_column_company.fxml"));
            loader.setRoot(this);
            loader.setController(this);

            loader.load();
        }
        catch (IOException e) {
            e.printStackTrace();
        }
    }

    @FXML
    private void initialize() {
        eikColumn.setCellValueFactory(cdf -> new SimpleStringProperty(getCellObservableValue(cdf.getValue()).getValue().getEik()));
        vatColumn.setCellValueFactory(cdf -> new SimpleStringProperty(getCellObservableValue(cdf.getValue()).getValue().getVat()));
        nameColumn.setCellValueFactory(cdf -> new SimpleStringProperty(getCellObservableValue(cdf.getValue()).getValue().getName()));
        addressColumn.setCellValueFactory(cdf -> new SimpleStringProperty(getCellObservableValue(cdf.getValue()).getValue().getAddress()));
    }

    public String getName() {
        return name.get();
    }

    public StringProperty nameProperty() {
        return name;
    }

    public void setName(String name) {
        this.name.set(name);
    }
}