如何在JavaFX中的特定点检测节点？

如何在JavaFX中的特定点获取Node？
在Java Swing中，有一个方法SwingUtilities.getDeepestComponentAt 。 有没有支持Swing的JavaFX方法？

在JavaFx中， javafx.scene.Node.impl_pickNode(double parentX, double parentY)但它返回null

Sinppet代码：

 scene.getRoot().impl_pickNode(428.0, 278.0); 

例：

 public class Main extends Application { public static void main(String[] args) { Application.launch(args); } @Override public void start(Stage stage) { stage.setTitle("ComboBoxSample"); Scene scene = new Scene(new Group(), 450, 250); TextField notification = new TextField (); notification.setText("Label"); notification.clear(); GridPane grid = new GridPane(); grid.setVgap(4); grid.setHgap(10); grid.setPadding(new Insets(5, 5, 5, 5)); grid.add(new Label("To: "), 0, 0); grid.add(notification, 1, 0); scene.setOnMouseClicked(mouseHandler); Group root = (Group) scene.getRoot(); root.getChildren().add(grid); stage.setScene(scene); stage.show(); } EventHandler mouseHandler = new EventHandler() { @Override public void handle(MouseEvent mouseEvent) { System.out .println(mouseEvent.getEventType() + "\n" + "X : Y - " + mouseEvent.getX() + " : " + mouseEvent.getY() + "\n" + "SceneX : SceneY - " + mouseEvent.getSceneX() + " : " + mouseEvent.getSceneY() + "\n" + "ScreenX : ScreenY - " + mouseEvent.getScreenX() + " : " + mouseEvent.getScreenY()); Scene scene = (Scene) mouseEvent.getSource(); Object node = scene.getRoot().impl_pickNode(428.0, 278.0); if(node != null) System.out.println("node is: " + node.getClass().getName().toString()); else{ System.out.println("node is NULL"); } Iterator windows = Window.impl_getWindows(); while (windows.hasNext()) { Window wnd = windows.next(); if (wnd instanceof Stage) { Stage stage = (Stage) wnd; System.out.println("---> " + stage.getTitle()); } } } }; 

}