glutTabletButtonFunc(3GLUT) GLUT glutTabletButtonFunc(3GLUT)

NAME
glutTabletButtonFunc - sets the special keyboard callback
for the current window.

SYNTAX
void glutTabletButtonFunc(void (*func)(int button, int state,
int x, int y));

ARGUMENTS
func The new tablet button callback function.

DESCRIPTION
glutTabletButtonFunc sets the tablet button callback for
the current window. The tablet button callback for a win-
dow is called when the window has tablet input focus (nor-
mally, when the mouse is in the window) and the user gen-
erates tablet button presses. The button parameter will be
the button number (starting at one). The number of avail-
able tablet buttons can be determined with glutDe-
viceGet(GLUT_NUM_TABLET_BUTTONS). The state is either
GLUT_UP or GLUT_DOWN indicating whether the callback was
due to a release or press respectively. The x and y call-
back parameters indicate the window relative coordinates
when the tablet button state changed.

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

Passing NULL to glutTabletButtonFunc disables the genera-
tion of tablet button callbacks. When a new window is cre-
ated, no tablet button callback is initially registered.

SEE ALSO
glutTabletMotionFunc, glutDeviceGet, glutMotionFunc,
glutSpaceballMotionFunc

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

GLUT 3.2 1