glutSpaceballButtonFunc(3GLUT) GLUT glutSpaceballButtonFunc(3GLUT)NAMEglutSpaceballButtonFunc - sets the Spaceball button callback for the
current window.
SYNTAX
#include <GLUT/glut.h>
void glutSpaceballButtonFunc(void (*func)(int button, int state));
ARGUMENTS
func The new spaceball button callback function.
DESCRIPTIONglutSpaceballButtonFunc sets the Spaceball button callback for the cur‐
rent 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 glutDe‐
viceGet(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, glut‐
ButtonBoxFunc, glutTabletButtonFunc, glutJoystickFunc, glutDeviceGet
AUTHOR
Mark J. Kilgard (mjk@nvidia.com)
GLUT 3.7 glutSpaceballButtonFunc(3GLUT)
