Re: [gtkmm] [beginner question] Problems with menu, menu bar

[MHL Schulze t-online de (Martin Schulze)]

Am 13.07.2002 12:48 schrieb(en) Daniel Perez Alcazar:
> Hi!
>
> I need a menu bar in my program. The thing is that I get the menu bar,
> but
> not the submenu when I press the menu bar entry. Pardon me if it's a too
> silly question... I warned you, it's a "beginner question" ;-)
>
> I've attached the code.
>
> Thanks,
>
> Dani P.
>
> <--------------- The main function ------------------->
>
> #include <gtk--/main.h>
> #include <gtk--/window.h>
> #include <gtk--/box.h>
> #include "nsMenu.h"
>
> int main (int argc, char *argv[])
> {
> 	Gtk::Main start(argc,argv);
> 	 	 	/////////// Creating the menu bar...////////////
> 	nsMenu menu;
> 	menu.show_all();
> 	 
> /////////////////////////////////////////////////////////////	 	 	 	 
> /////////// Putting all together ///////////////////
> 	Gtk::VBox main_packing_box(FALSE,0);
> 	main_packing_box.pack_start(menu,false,0);
> 	main_packing_box.show();
> 	////////////////////////////////////////////////////////////
> 	 	 	////////////////// Main window ///////////////////
> 	Gtk::Window window(GTK_WINDOW_TOPLEVEL);
> 	window.set_title("NetScout");
> 	window.set_policy(false,true,false);
> 	window.add(main_packing_box);
> 	window.show();
> 	///////////////////////////////////////////////////////////
> 	 	start.run();
>
> 	return(0);
> }
> <------------------------------------------->
>
> <--------------- My menu class ----------------->
>
> <<<<<<<<The header>>>>>>>>>>
>
> #include <gtk--/menubar.h>
> #include <gtk--/menu.h>
>
> class nsMenu : public Gtk::MenuBar
> {
> 	public:
>
> 	nsMenu();
> };
>
> <<<<<<The implemetantion>>>>>>
>
> #include "nsMenu.h"
>
> nsMenu::nsMenu()
> {
> 	using namespace Gtk;
> 		 		 	//////////////////// The "file" 
> menu //////////////////////
> 	Menu file_menu;

You should try Menu* file_menu = manage( new Menu );
By the way, there is a more convinient stl-style interface for building
menu trees. Look at the docs of namespace Gtk::Menu_Helpers for more
information. I think the examples also use this interface.

> 	MenuItem *root_file;
> 		root_file=manage(new MenuItem("File"));
> 				file_menu.append(*manage(new 
> MenuItem("_Open")));
> 				file_menu.append(*manage(new 
> MenuItem("_Save")));
> 		root_file->set_submenu(file_menu);
> 	 
> ///////////////////////////////////////////////////////////////////		 		 	 	 
> //////////////////// The menu bar, mother of all menus
> //////////////////////
> 	append(*root_file);
> 	 
> //////////////////////////////////////////////////////////////////////////////////////////////////
> 	 	 }
>
> <------------------------------------------------->
>
>
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