glutDialsFunc(3GLUT) GLUT glutDialsFunc(3GLUT)
NAME
glutDialsFunc - sets the dial & button box dials callback for the cur-
rent window.
SYNTAX
void glutDialsFunc(void (*func)(int dial, int value));
ARGUMENTS
func The new dials callback function.
DESCRIPTION
glutDialsFunc sets the dial & button box dials callback for the current
window. The dial & button box dials callback for a window is called
when the window has dial & button box input focus (normally, when the
mouse is in the window) and the user generates dial & button box dial
changes. The dial parameter will be the dial number (starting at one).
The number of available dial & button box dials can be determined with
glutDeviceGet(GLUT_NUM_DIALS). The value measures the absolute rotation
in degrees. Dial values do not ``roll over'' with each complete rota-
tion but continue to accumulate degrees (until the int dial value over-
flows).
Registering a dial & button box dials callback when a dial & button box
device is not available is ineffectual and not an error. In this case,
no dial & button box dials callbacks will be generated.
Passing NULL to glutDialsFunc disables the generation of dial & button
box dials callbacks. When a new window is created, no dial & button box
dials callback is initially registered.
SEE ALSO
glutButtonBoxFunc(3), glutDeviceGet(3)
AUTHOR
Mark J. Kilgard (mjk@nvidia.com)
GLUT 3.7 glutDialsFunc(3GLUT)
Mac OS X 10.6 - Generated Thu Sep 17 20:20:39 CDT 2009