The QMenuData class is a base class for QMenuBar and QPopupMenu . ... int  insertItem  ( const char * text, const QObject * receiver, const char * member, int accel, int id, int index = -1 )  . ... QMenuData has an internal list of menu items. ... Menu items can be accessed through identifiers. ... Returns the index of the menu item with identifier id, or -1 if there is no item with such an identifier. ... If id == -1 (default), the identifier is set equal to the menu item's real index (see below). ...