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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Gtkada: attach signals to menus
Date: Sat, 18 Jun 2016 20:07:48 +0200
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Date: 2016-06-18T20:07:48+02:00
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On 2016-06-18 19:05, Stephen Leake wrote:

> I'm using GNAT 2016 GtkAda. I'm trying to set a menu signal handler
> in  code, but the signal handler is not called.

Great! I missed notification that it is out. (I hope that it is not too 
much GtkAda code is broken since GtkAda GPL 2015)

> pragma License (GPL);
>
> with Ada.Text_IO;
> with Gtk.Main;
> with Gtk.Menu;
> with Gtk.Menu_Bar;
> with Gtk.Menu_Item;
> with Gtk.Menu_Shell;
> with Gtk.Widget;
> package body Menu_Demo_Pkg is
>
>    procedure On_Window_Destroy (Widget : access Gtk.Widget.Gtk_Widget_Record'Class)
>    is
>       pragma Unreferenced (Widget);
>    begin
>       Gtk.Main.Main_Quit;
>    end On_Window_Destroy;
>
>    procedure On_File_Menu_Activate
>      (Self       : access Gtk.Menu_Shell.Gtk_Menu_Shell_Record'Class;
>       Force_Hide : Boolean)
>    is
>       pragma Unreferenced (Force_Hide);
>       pragma Unreferenced (Self);
>    begin
>       Ada.Text_IO.Put_Line ("On_File_Menu_Activate");
>    end On_File_Menu_Activate;
>
>    procedure On_Menu_Activate
>      (Self       : access Gtk.Menu_Shell.Gtk_Menu_Shell_Record'Class;
>       Force_Hide : Boolean)
>    is
>       pragma Unreferenced (Force_Hide);
>       pragma Unreferenced (Self);
>    begin
>       Ada.Text_IO.Put_Line ("On_Menu_Activate");
>    end On_Menu_Activate;
>
>    function Gtk_New return Gtk.Window.Gtk_Window
>    is
>       use Gtk.Menu;
>       use Gtk.Menu_Item;
>
>       Main_Window : constant Gtk.Window.Gtk_Window     := Gtk.Window.Gtk_Window_New;
>       Menu_Bar    : constant Gtk.Menu_Bar.Gtk_Menu_Bar := Gtk.Menu_Bar.Gtk_Menu_Bar_New;
>       Menu        : constant Gtk_Menu                  := Gtk_Menu_New;
>       Item        : Gtk_Menu_Item;
>
>    begin
>       Main_Window.On_Destroy (On_Window_Destroy'Access);
>
>       Menu.Append (Gtk_Menu_Item_New_With_Mnemonic ("_Quit"));
>       Item := Gtk_Menu_Item_New_With_Mnemonic ("_File");
>       Item.Set_Submenu (Menu);

Why not this:

Item.On_Activate (...); -- Called when File is activated

> When I run menu_demo, a window shows, with a menu. But when I select the menu item, no text is displayed.
>
> How do I make this work?

I believe "activate-current" is not a notification signal, rather a 
signal emitted in order to activate the menu item.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de