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glutButtonBoxFunc(3GLUT)                            GLUT                            glutButtonBoxFunc(3GLUT)



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 callback for the current window. The dial & but-ton button
       ton 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 & but-ton button
       ton  box  buttons  can  be  determined  with glutDeviceGet(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  respec-tively. respectively.
       tively.

       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 button 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 initially registered.

SEE ALSO
       glutDialsFunc(3G), glutDeviceGet(3G), glutSpaceballButtonFunc(3G), glutTabletButtonFunc(3G)


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



GLUT                                                 3.7                            glutButtonBoxFunc(3GLUT)