+ Gtk::Button* cancel_but = add_button (Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);
+ Gtk::Button* ok_but = add_button (Gtk::Stock::OK, Gtk::RESPONSE_OK);
+
+ cancel_but->signal_clicked().connect (sigc::mem_fun (*this, &PortInsertWindow::cancel));
+ ok_but->signal_clicked().connect (sigc::mem_fun (*this, &PortInsertWindow::accept));