glutbuttonboxfunc(3)
NAME
glutButtonBoxFunc - sets the dial & button box button
callback for the current window.
SYNTAX
- void glutButtonBoxFunc(void (*func)(int button, int
- state));
ARGUMENTS
func The new button box callback function.
DESCRIPTION
glutButtonBoxFunc sets the dial & button box button call
back for the current window. The dial & button box button
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 button
presses. The button parameter will be the button number
(starting at one). The number of available dial & button
box buttons can be determined with glutDe
viceGet(GLUT_NUM_BUTTON_BOX_BUTTONS). The state is either
GLUT_UP or GLUT_DOWN indicating whether the callback was
due to a release or press respectively.
Registering a dial & button box button callback when a
dial & button box device is not available is ineffectual
and not an error. In this case, no dial & button box but
ton callbacks will be generated.
Passing NULL to glutButtonBoxFunc disables the generation
of dial & button box button callbacks. When a new window
is created, no dial & button box button callback is ini
tially registered.
SEE ALSO
glutDialsFunc, glutDeviceGet, glutSpaceballButtonFunc,
glutTabletButtonFunc
AUTHOR
- Mark J. Kilgard (mjk@nvidia.com)