JavaFX菜单栏中的右对齐菜单 [英] Right align menu in menubar in JavaFX

问题描述

在Java Swing中，可以使用以下命令在菜单栏的右侧放置一个菜单:

In Java Swing it is possible to put a menu on the right side of the menu bar using:

menubar.add(menu1);
menubar.add(Box.createHorizontalGlue());
menubar.add(menu2);

这会将menu1放在左侧，将menu2放在右侧.此功能(显然)在JavaFX中不可用.

This will put menu1 on the left and menu2 on the right. This function is (obviously) not available in JavaFX.

在JavaFX中，我已经看到可以使用以下工具栏实现相同的目的:

In JavaFX, I have seen that the same can be achieved for a toolbar using:

final Pane rightSpacer = new Pane();
HBox.setHgrow(
    rightSpacer,
    Priority.SOMETIMES
);

尽管如此，此变通办法不适用于菜单.

Although, this workaround is not usuable for menus.

问题:是否可以为JavaFX中的菜单创建正确的分隔符?

Question: is there a way to create a right spacer for menus in JavaFX?

推荐答案

一种小巧的方法是在HBox中使用两个菜单栏.您可以通过向其添加menu-bar样式类，为分隔符提供与菜单栏相同的样式:

One slightly-hacky way would be to use two menu bars in a HBox. You can give the spacer separating them the same style as a menu bar by adding the menu-bar style class to it:

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Menu;
import javafx.scene.control.MenuBar;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Priority;
import javafx.scene.layout.Region;
import javafx.stage.Stage;

public class MenuAlignment extends Application {

    @Override
    public void start(Stage primaryStage) {
        MenuBar leftBar = new MenuBar();
        leftBar.getMenus().addAll(new Menu("File"), new Menu("Edit"));
        MenuBar rightBar = new MenuBar();
        rightBar.getMenus().addAll(new Menu("Help"));
        Region spacer = new Region();
        spacer.getStyleClass().add("menu-bar");
        HBox.setHgrow(spacer, Priority.SOMETIMES);
        HBox menubars = new HBox(leftBar, spacer, rightBar);

        BorderPane root = new BorderPane();
        root.setTop(menubars);
        Scene scene = new Scene(root, 600, 600);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}

此方法的潜在缺点是您不能将其用作

A potential disadvantage of this approach is that you couldn't use this as a system menu bar.

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