//how to create a menubar with hotkeys

Menu fm;
MenuItem ol,sl;
int i;

void setup(){
  size(400,400);
  this.frame.setTitle("example: a menubar with hotkeys");
  MenuBar mb = new MenuBar();  
  mb.add(fm = new Menu("File"));
  fm.add(ol = new RedirectingMenuItem(this,"Open", new MenuShortcut( KeyEvent.VK_O )));  
  fm.add(sl = new RedirectingMenuItem(this,"Save", new MenuShortcut( KeyEvent.VK_S )));
  this.frame.setMenuBar(mb);
  background(0); 
}

void draw(){
  background(i%=255);
  i++;
}

boolean action(Event e, Object arg) {
  if (e.target == ol) {
    println("Here's where you would put your file loading code.");
    return true;    
  } 
  else if (e.target == sl) {
    println("And here's where you would save.");
  }
  return super.action(e,arg);
}

public class RedirectingMenuItem extends MenuItem {
  private Component event_handler;
  public RedirectingMenuItem(Component event_handler, String label, MenuShortcut hotkey) {
    super(label,hotkey);    
    this.event_handler = event_handler;
  }
  public boolean postEvent(Event e) {
    if (event_handler.isValid()) return event_handler.postEvent(e);
    else return false;
  }
}