glutMenuStateFunc man page
glutMenuStateFunc — Deprecated variant of glutMenuStatusFunc()
OpenGLUT - deprecated
glutMenuStateFunc(void( *callback )( int status ));
Client menu status hook.
Broadly, OpenGLUT operates in two modes. At any given time, it is either in menu mode (with a popup menu display, possibly with subitems) or it is not.
When moving from non-menu to menu status,callback
(if defined) will be called withGLUT_MENU_IN_USE
. Conversely, when moving from menu to non-menu status,callback
(if defined) will be called withGLUT_MENU_NOT_IN_USE
This callback is bound toboth
Your callback is not actually called presently.