javafx-2 - 带有多行表头的JavaFX 2.0 Table

Question

是否可以使javaFX 2.0表带有多行标题？
我在网上找到的所有示例都有表格，其中columnt header 宽度=文字大小，不包含换行符。屏幕上显示了我所拥有的和所需要的一切:

Answer 1

我想出了以下功能:

private void makeHeaderWrappable(TableColumn col) {
  Label label = new Label(col.getText());
  label.setStyle("-fx-padding: 8px;");
  label.setWrapText(true);
  label.setAlignment(Pos.CENTER);
  label.setTextAlignment(TextAlignment.CENTER);

  StackPane stack = new StackPane();
  stack.getChildren().add(label);
  stack.prefWidthProperty().bind(col.widthProperty().subtract(5));
  label.prefWidthProperty().bind(stack.prefWidthProperty());
  col.setGraphic(stack);
}

完整的可执行示例是 in this gist(需要 2.2 developer preview as a minimum)。

import javafx.application.Application;
import javafx.beans.property.SimpleStringProperty;
import javafx.collections.FXCollections;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.layout.Pane;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.scene.text.TextAlignment;
import javafx.stage.Stage;

public class TableWrappedHeaders extends Application {
  public static void main(String[] args) { launch(args); }

  @Override public void start(Stage stage) {
    TableColumn firstNameCol = new TableColumn("First Name (which is a really long name)");
    makeHeaderWrappable(firstNameCol);
    firstNameCol.setPrefWidth(100);
    firstNameCol.setCellValueFactory(new PropertyValueFactory<Person,String>("firstName"));
    TableColumn lastNameCol = new TableColumn("Last Name");
    lastNameCol.setPrefWidth(100);
    lastNameCol.setCellValueFactory(new PropertyValueFactory<Person,String>("lastName"));

    TableView table = new TableView();
    table.getColumns().addAll(firstNameCol, lastNameCol);
    table.setItems(FXCollections.observableArrayList(
      new Person("Jacob", "Smith"),
      new Person("Isabella", "Johnson"),
      new Person("Ethan", "Williams")
    ));
    table.setPrefSize(250, 200);

    Pane layout = new VBox(10);
    layout.setStyle("-fx-padding: 10;");
    layout.getChildren().addAll(table);
    stage.setScene(new Scene(layout));
    stage.show();
  }

  private void makeHeaderWrappable(TableColumn col) {
    Label label = new Label(col.getText());
    label.setStyle("-fx-padding: 8px;");
    label.setWrapText(true);
    label.setAlignment(Pos.CENTER);
    label.setTextAlignment(TextAlignment.CENTER);

    StackPane stack = new StackPane();
    stack.getChildren().add(label);
    stack.prefWidthProperty().bind(col.widthProperty().subtract(5));
    label.prefWidthProperty().bind(stack.prefWidthProperty());
    col.setText(null);
    col.setGraphic(stack);
  }

  public static class Person {
    private final SimpleStringProperty firstName;
    private final SimpleStringProperty lastName;

    private Person(String fName, String lName) {
      this.firstName = new SimpleStringProperty(fName);
      this.lastName = new SimpleStringProperty(lName);
    }

    public String getFirstName() { return firstName.get(); }
    public void setFirstName(String fName) { firstName.set(fName); }
    public String getLastName() { return lastName.get(); }
    public void setLastName(String fName) { lastName.set(fName); }
  }
}

可能有更好的方法来执行此操作，但是上面的函数至少对我的测试用例有用。

我认为这可以通过简单的CSS样式实现，但是我无法仅通过CSS来实现。