options_table.attach(checkbutton_aspect_lock, 0, 2, 1, 2, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
checkbutton_aspect_lock.signal_toggled().connect(sigc::mem_fun(*this,&StateScale_Context::refresh_aspect_lock_flag));
options_table.attach(checkbutton_aspect_lock, 0, 2, 1, 2, Gtk::EXPAND|Gtk::FILL, Gtk::EXPAND|Gtk::FILL, 0, 0);
checkbutton_aspect_lock.signal_toggled().connect(sigc::mem_fun(*this,&StateScale_Context::refresh_aspect_lock_flag));