glutMouseWheelFunc man page

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)

 

Referenced By

glutCreateMenuWindow(3), glutMouseFunc(3).