_main_automation_menu_map[Evoral::Parameter(GainAutomation)] = gain_automation_item;
automation_items.push_back (CheckMenuElem (_("Pan"), sigc::mem_fun (*this, &AudioTimeAxisView::update_pan_track_visibility)));
pan_automation_item = dynamic_cast<CheckMenuItem*> (&automation_items.back ());
pan_automation_item->set_active ((!for_selection || _editor.get_selection().tracks.size() == 1) &&
_main_automation_menu_map[Evoral::Parameter(GainAutomation)] = gain_automation_item;
automation_items.push_back (CheckMenuElem (_("Pan"), sigc::mem_fun (*this, &AudioTimeAxisView::update_pan_track_visibility)));
pan_automation_item = dynamic_cast<CheckMenuItem*> (&automation_items.back ());
pan_automation_item->set_active ((!for_selection || _editor.get_selection().tracks.size() == 1) &&