glutmousewheelfunc(3) centos man page | unix.com

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NAME
     glutMouseWheelFunc -- Sets the mouse wheel callback for the current window.

LIBRARY
     OpenGLUT - input

SYNOPSIS
     #include <openglut.h>

     void
     glutMouseWheelFunc(void( *callback )( int wheel, int direction, int x, int y ));

PARAMETERS
      callback	   Client hook for mouse wheel events.

DESCRIPTION
     If the mouse wheel is spun over your (sub)window, OpenGLUT will, in theory, report this via the MouseWheel callback.   wheel  is the wheel
     number,  direction  is +/- 1, and	x  and	y  are the mouse coordinates.

     If you do not register a wheel callback, wheel events will be reported as mouse buttons.

     This callback is bound to the  current window  .

CAVEATS
     Due to lack of information about the mouse, it is impossible to implement this correctly on X at this time.  Use of this function limits the
     portability of your application.  (This feature  does   work on X, just not reliably.)  You are encouraged to use the standard, reliable
     mouse-button reporting, rather than wheel events.

     Windows created via glutCreateMenuWindow() always cascade keyboard and mouse events to their parent.

SEE ALSO
     glutMouseFunc(3)

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