From: Joe Van Dyk <joevandyk@...>
Date: 2005-07-22T05:56:51+09:00
Subject: Re: ruby gnome question

On 7/21/05, Joe Van Dyk <joevandyk@gmail.com> wrote:
> I have something like this
> 
> class MenuBar < Gtk::MenuBar
>   def initialize
>     super
>     # create menu buttons
>     show
>   end
> end
> 
> class ApplicationWindow < Gtk::Window
>   def initialize
>     super
>     container = Gtk::VBox.new
>     container.pack_start MenuBar.new
>     container.show
>   end
> end
> 
> So, when the menu bar gets clicked, a signal gets emitted in the Menu
> Bar object.  How can the Application Window object know that a menu
> bar gets clicked?  Do I need to create a new signal to notify the
> Application Window?

Below is the actual class, would appreciate suggestions on how I can
notify another object that the menu has been clicked.  Or should I not
do things this way?

class MenuBar < Gtk::MenuBar
  def initialize
    super

    # Create the File Menu
    file_menu = create_top_level_menu "File"
    create_menu_item(file_menu, "Quit") { Gtk::main_quit }

    # Create the Scaling Menu
    scale_menu = create_top_level_menu "Scaling"
    for scale in World.instance.Scales    # returns an array of ints
      create_menu_item(scale_menu, scale.to_s) do
         # Gets ran when the menu option gets clicked.  how can i
notify other objects
         # that it has been clicked?
         # 
         # Also, if I print out the value of scale here , it's always
the same, no matter what
         # menu option has been clicked.  Why is that?
      end
    end

    # Show the Menu
    show
  end

  # Create a top level menu
  def create_top_level_menu title
    top_menu = Gtk::MenuItem.new title
    sub_menu = Gtk::Menu.new
    top_menu.submenu = sub_menu
    sub_menu.show
    top_menu.show
    append top_menu
    sub_menu
  end

  # Create a menu item that goes under a top level menu
  def create_menu_item menu, title, &action
    menu_item = Gtk::MenuItem.new title
    menu_item.signal_connect('activate') { action.call }
    menu_item.show
    menu.append menu_item
  end
end