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glutSpaceballButtonFunc(3GLUT)                      GLUT                      glutSpaceballButtonFunc(3GLUT)



NAME
       glutSpaceballButtonFunc - sets the Spaceball button callback for the current window.

SYNTAX
       void glutSpaceballButtonFunc(void (*func)(int button, int state));

ARGUMENTS
       func      The new spaceball button callback function.

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

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

       Passing NULL to glutSpaceballButtonFunc disables the generation of Spaceball button callbacks. When a
       new window is created, no Spaceball button callback is initially registered.

SEE ALSO
       glutSpaceballMotionFunc(3G), glutSpaceballRotateFunc(3G), glutMouseFunc(3G), glutButtonBoxFunc(3G), glutTabletButton-Func(3G), glutTabletButtonFunc(3G),
       Func(3G), glutJoystickFunc(3G), glutDeviceGet(3G)


AUTHOR
       Mark J. Kilgard (mjk@nvidia.com)



GLUT                                                 3.7                      glutSpaceballButtonFunc(3GLUT)