//SetScrollCallback sets the scroll callback which is called when a scrolling
//device is used, such as a mouse wheel or scrolling area of a touchpad.
func (w *Window) SetScrollCallback(cbfun func(w *Window, xoff float64, yoff float64)) {
if cbfun == nil {
C.glfwSetScrollCallback(w.data, nil)
} else {
w.fScrollHolder = cbfun
C.glfwSetScrollCallbackCB(w.data)
}
}
// SetScrollCallback sets the scroll callback which is called when a scrolling
// device is used, such as a mouse wheel or scrolling area of a touchpad.
func (w *Window) SetScrollCallback(cbfun ScrollCallback) (previous ScrollCallback) {
previous = w.fScrollHolder
w.fScrollHolder = cbfun
if cbfun == nil {
C.glfwSetScrollCallback(w.data, nil)
} else {
C.glfwSetScrollCallbackCB(w.data)
}
panicError()
return previous
}