DragonFly On-Line Manual Pages

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 button 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, glutSpaceballRotateFunc, glutMouseFunc,
       glutButtonBoxFunc, glutTabletButtonFunc, glutJoystickFunc,
       glutDeviceGet

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

GLUT                                  3.7       glutSpaceballButtonFunc(3GLUT)