Utilizando as facilidades do GtkMenuBar

<?php
/**
 * Utilizando as facilidades do GtkMenuBar
 * PHP-GTK
 * http://andor.com.br
 */

/**
 * Seta a codificação do programa
 */
ini_set("php-gtk.codepage", "UTF-8");

/**
 * @Demo
 */
class Demo {
    /**
     * Armazena os widgets necessarios
     *
     * @access private
     * @property array $widgets
     */
    public $widgets = array();

    /**
     * @name __construct()
     * @return Demo
     */
    public function __construct() {
        // Cria a janela
        $this->widgets['frmDemo'] = new GtkWindow();
        $this->widgets['frmDemo']->set_size_request(250, 250);
        $this->widgets['frmDemo']->set_position(Gtk::WIN_POS_CENTER_ALWAYS);
        $this->widgets['frmDemo']->set_title("Demo");
        $this->widgets['frmDemo']->connect("destroy", array($this, "frmDemo_unload"));

        $vbox = new GtkVBox();

        // Adiciona o menu
        $this->widgets['mnuBar'] = Fabula::GtkMenuBar();
        $vbox->pack_start($this->widgets['mnuBar'], FALSE, FALSE);

        // Arquivo
        $mnuFile = $this->widgets['mnuBar']->append_menu("_Arquivo");
        $mnuImportar = $mnuFile->append_menu("Importar");
        $mnuFile->append_item("Exportar");
        $mnuFile->append_separator();
        $mnuFile->append_item("Sair", array($this, "sair_onclick"));

        // Importar
        $mnuImportar->append_item("Arquivo 1");
        $mnuImportar->append_item("Arquivo 2");

        // Ajuda
        $mnuHelp = $this->widgets['mnuBar']->append_menu("Aju_da");
        $mnuHelp->append_item("Ajuda");
        $mnuHelp->append_item("Site na Web");
        $mnuHelp->append_separator();
        $mnuHelp->append_item("Sobre");

        $this->widgets['frmDemo']->add($vbox);
        $vbox->pack_start(new GtkFixed(), TRUE, TRUE);

        // Inicia a aplicação
        $this->frmDemo_onload();
    }

    /**
     * Método do carregamento do formulario
     *
     * @name frmDemo_onload()
     */
    public function frmDemo_onload() {
        // Inicia a aplicação
        $this->widgets['frmDemo']->show_all();
        Gtk::main();
    }

    /**
     * Método do descarregamento do formulario
     *
     * @name frmDemo_unload()
     */
    public function frmDemo_unload() {
        // Encerra a aplicação
        Gtk::main_quit();
    }
}

/**
 * Inicia o demo
 */
new Demo();