glutSpaceballButtonFunc(3GLUT)GLUTglutSpaceballButtonFunc(3GLUT)NAMEglutSpaceballButtonFunc - sets the Spaceball button call
back for the current window.
SYNTAX
void glutSpaceballButtonFunc(void (*func)(int button, int state));
ARGUMENTS
func The new spaceball button callback function.
DESCRIPTIONglutSpaceballButtonFunc 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 param
eter will be the button number (starting at one). The num
ber 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 call
back 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 gener
ated.
Passing NULL to glutSpaceballButtonFunc disables the gen
eration of Spaceball button callbacks. When a new window
is created, no Spaceball button callback is initially reg
istered.
SEE ALSO
glutSpaceballMotionFunc, glutSpaceballRotateFunc, glut
MouseFunc, glutButtonBoxFunc, glutTabletButtonFunc,
glutJoystickFunc, glutDeviceGet
AUTHOR
Mark J. Kilgard (mjk@nvidia.com)
GLUT 3.7 1
