KeyEvent.code is set to UNDEFINED


import javafx.scene.Scene;

import javafx.embed.swt.FXCanvas;
import javafx.event.EventHandler;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.VBox;

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;

import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class Main {

    private static void createScene(final FXCanvas fxPanel) {
        VBox root = new VBox();
        final Scene scene = new Scene(root);

        scene.setOnKeyPressed(new EventHandler<KeyEvent>() {
            public void handle(KeyEvent ke) {
                System.out.println("OnKeyPressed KeyEvent: " + ke);
            }
        });

        scene.setOnKeyReleased(new EventHandler<KeyEvent>() {
            public void handle(KeyEvent ke) {
                System.out.println("OnKeyReleased KeyEvent: " + ke);
            }
        });

        Button button = new Button("Button");

        TextField text = new TextField();

        root.getChildren().add(button);
        root.getChildren().add(text);

        fxPanel.setScene(scene);
    }

    public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setSize(400, 400);
        shell.setLayout(new FillLayout());

        final FXCanvas fxPanel = new FXCanvas(shell, SWT.NONE);

        createScene(fxPanel);

        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) {
                display.sleep();
            }
        }
    }
}