向以JavaFX为中心的网格窗格添加顶部菜单

Question

我对JavaFX很陌生。我正在使用网格窗格来保持我的项目在页面的中心，而不管窗口的大小是如何调整的。我想添加一个沿着顶部运行的菜单。我很快发现grid.settop（菜单栏）不是grid Pane的成员函数。有办法吗？

我可以在一个场景中创建两种不同类型的窗格吗？例如，一个用于居中项目的网格窗格和一个用于将菜单置于顶部的边框窗格？或者我应该使用CSS样式来获得顶部的菜单栏？

public void start(Stage primaryStage) {
    try {
    primaryStage.setTitle("Bapu Inventory");
    BorderPane root = new BorderPane();
    GridPane grid = new GridPane();
    grid.setAlignment(Pos.CENTER);
    grid.setHgap(10);
    grid.setVgap(10);
    grid.setPadding(new Insets(25, 25, 25, 25));
    Text scenetitle = new Text("Welcome");
    grid.add(scenetitle, 0, 0, 1, 1);


    MenuBar menuBar = new MenuBar();
    menuBar.prefWidthProperty().bind(primaryStage.widthProperty());
//This is the line I can't figure out. How do I get this to position at top left?
    grid.setTop(menuBar);

Answer 1

检查这是否是您想要的：

public void start(Stage primaryStage) {
        try {
            BorderPane root = new BorderPane();

            //Create your menu
            final Menu menu1 = new Menu("File");
            final Menu menu2 = new Menu("Options");
            final Menu menu3 = new Menu("Help");
            MenuBar menuBar = new MenuBar();
            menuBar.getMenus().addAll(menu1, menu2, menu3);

            //Your GridPane
            GridPane grid = new GridPane();
            grid.setAlignment(Pos.CENTER);
            grid.setHgap(10);
            grid.setVgap(10);
            grid.setPadding(new Insets(25, 25, 25, 25));
            Text scenetitle = new Text("Welcome");
            grid.add(scenetitle, 0, 0, 1, 1);

            //Add them  to root (BorderPane)
            root.setTop(menuBar);
            root.setCenter(grid);


            Scene scene = new Scene(root,400,400);
            primaryStage.setScene(scene);
            primaryStage.show();
        } catch(Exception e) {
            e.printStackTrace();
        }
}