惠州如何改变JavaFX树表视图的视觉外观？_北大青鸟IT学校

大家知道如何改变JavaFX树表视图的视觉外观吗？下面惠州北大青鸟老师给大家科普一下如何改变JavaFX树表视图的视觉外观。

treeTableView.setTableMenuButtonVisible(true)启用表格菜单按钮，以便用户可以切换表列的可见性。 该方法将“+”按钮添加到表头。

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import java.util.Arrays;

import java.util.List;

import javafx.application.Application;

import javafx.beans.property.ReadOnlyStringWrapper;

import javafx.beans.property.SimpleStringProperty;

import javafx.scene.Group;

import javafx.scene.Scene;

import javafx.scene.control.TreeItem;

import javafx.scene.control.TreeTableColumn;

import javafx.scene.control.TreeTableView;

import javafx.stage.Stage;

public class Main extends Application {

  List<Employee> employees = Arrays.<Employee> asList(new Employee(

      "Ethan Williams", "ethan.williams@example.com"), new Employee(

      "Emma Jones", "emma.jones@example.com"), new Employee("Michael Brown",

      "michael.brown@example.com"), new Employee("Anna Black",

      "anna.black@example.com"), new Employee("Rodger York",

      "roger.york@example.com"), new Employee("Susan Collins",

      "susan.collins@example.com"));

  final TreeItem<Employee> root = new TreeItem<>(new Employee(

      "Sales Department", ""));

  public static void main(String[] args) {

    Application.launch(Main.class, args);

  }

  @Override

  public void start(Stage stage) {

    root.setExpanded(true);

    employees.stream().forEach((employee) -> {

      root.getChildren().add(new TreeItem<>(employee));

    });

    Scene scene = new Scene(new Group(), 400, 400);

    Group sceneRoot = (Group) scene.getRoot();

    TreeTableColumn<Employee, String> empColumn = new TreeTableColumn<>(

        "Employee");

    empColumn.setPrefWidth(150);

    empColumn

        .setCellValueFactory((

            TreeTableColumn.CellDataFeatures<Employee, String> param) -> new ReadOnlyStringWrapper(

            param.getValue().getValue().getName()));

    TreeTableColumn<Employee, String> emailColumn = new TreeTableColumn<>(

        "Email");

    emailColumn.setPrefWidth(190);

    emailColumn

        .setCellValueFactory((

            TreeTableColumn.CellDataFeatures<Employee, String> param) -> new ReadOnlyStringWrapper(

            param.getValue().getValue().getEmail()));

    TreeTableView<Employee> treeTableView = new TreeTableView<>(root);

    treeTableView.getColumns().setAll(empColumn, emailColumn);

    treeTableView.setTableMenuButtonVisible(true);

    sceneRoot.getChildren().add(treeTableView);

    stage.setScene(scene);

    stage.show();

  }

  public class Employee {

    private SimpleStringProperty name;

    private SimpleStringProperty email;

    public SimpleStringProperty nameProperty() {

      if (name == null) {

        name = new SimpleStringProperty(this, "name");

      }

      return name;

    }

    public SimpleStringProperty emailProperty() {

      if (email == null) {

        email = new SimpleStringProperty(this, "email");

      }

      return email;

    }

    private Employee(String name, String email) {

      this.name = new SimpleStringProperty(name);

      this.email = new SimpleStringProperty(email);

    }

    public String getName() {

      return name.get();

    }

    public void setName(String fName) {

      name.set(fName);

    }

    public String getEmail() {

      return email.get();

    }

    public void setEmail(String fName) {

      email.set(fName);

    }

  }

}

我们可以通过使用TreeTableView类的setShowRoot方法显示或隐藏根树项目。

treeTableView.setShowRoot(false);

上面的代码生成以下结果。

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