SYNTAX

       void glutButtonBoxFunc(void (*func)(int button, int state));

ARGUMENTS

       func      The new button box callback function.

DESCRIPTION

       glutButtonBoxFunc sets the dial & button box button  callback  for  the
       current  window.  The dial & button box button callback for a window is
       called when the window has dial & button  box  input  focus  (normally,
       when  the  mouse is in the window) and the user generates dial & button
       box button presses. The button parameter  will  be  the  button  number
       (starting  at  one).  The number of available dial & button box buttons
       can be determined with glutDeviceGet(GLUT_NUM_BUTTON_BOX_BUTTONS).  The
       state  is  either  GLUT_UP or GLUT_DOWN indicating whether the callback
       was due to a release or press respectively.

       Registering a dial & button box button callback when a  dial  &  button
       box  device  is  not available is ineffectual and not an error. In this
       case, no dial & button box button callbacks will be generated.

       Passing NULL to glutButtonBoxFunc disables the  generation  of  dial  &
       button  box  button  callbacks. When a new window is created, no dial &
       button box button callback is initially registered.

SEE ALSO

       glutDialsFunc, glutDeviceGet,  glutSpaceballButtonFunc,  glutTabletBut-
       tonFunc

AUTHOR

       Mark J. Kilgard (mjk@nvidia.com)



GLUT                                  3.7             glutButtonBoxFunc(3GLUT)