How to attach short cut keys to open a menu in a menubar

Question

Hi,
I have three menus say File, Edit, Help in the MenuBar and i want to open these menus when i press short cut key from Key board, say Alt+F for File menu, Alt E for Edit menu and so on. When the file menu is shown i want to select the New menuItem in it by CtrlN.
When i press Alt key the letter F in File, E in Edit should be underlined.
So can you please give me some sample code for this.
Thanks.

Answer 1

Hi. Here is an example. It works on Windows. I am not sure about other platforms.
   import java.util.AbstractMap.SimpleEntry;
import java.util.Map.Entry;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.effect.DropShadow;
import javafx.scene.effect.Effect;
import javafx.scene.effect.Glow;
import javafx.scene.effect.SepiaTone;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
import javafx.scene.layout.*;
import javafx.scene.*;
import javafx.geometry.*;
import javafx.application.Application;
import javafx.collections.ObservableList;
import javafx.geometry.Pos;
import javafx.scene.*;
import javafx.scene.control.*;
import javafx.scene.image.ImageView;
import javafx.scene.layout.*;
import javafx.stage.Stage;
public class MenuSample extends Application {
  public static void main(String[] args) { launch(args); }
  @Override public void start(final Stage stage) {
    // create some menus.
    final Menu fileMenu = new Menu("_File");
    fileMenu.getItems().addAll(
      new MenuItem("_Open"),
      new MenuItem("_Save"),
      new SeparatorMenuItem(),
      new MenuItem("_Exit")
    final Menu playMenu = new Menu("_Play");
    playMenu.getItems().addAll(
      new MenuItem("_Start"),
      new MenuItem("_Stop"),
      new MenuItem("_Pause"),
      new CheckMenuItem("_Rewind")
    final Menu helpMenu = new Menu("_Help");
    helpMenu.getItems().add(
      new MenuItem("About")
    final MenuBar menuBar = new MenuBar();
    menuBar.getMenus().addAll(fileMenu, playMenu, helpMenu);
    final VBox layout = new VBox(10);
    layout.getChildren().addAll(menuBar);   
   // layout.setAlignment(Pos.CENTER);
    layout.setStyle("-fx-background-color: linear-gradient(to bottom, silver, derive(silver, 80%));");
    final Scene scene = new Scene(layout, 400, 525);
    stage.setScene(scene);
    stage.show();
  //  ObservableList<Node> menuNodes = ((HBox) menuBar.lookup("HBox")).getChildren();
   // Control menuNode = (Control) menuNodes.get(menuNodes.size() - 2);
   //  menuNode.setMaxWidth(Double.MAX_VALUE);
   // HBox.setHgrow(menuNode, Priority.ALWAYS);
}