+ } else if (event->xany.type == ButtonPress &&
+ (event->xbutton.button == Button4 ||
+ event->xbutton.button == Button5)) {
+ gltrackball_mousewheel (kp->trackball, event->xbutton.button, 10,
+ !!event->xbutton.state);
+ return True;
+ } else if (event->xany.type == MotionNotify && kp->button_down_p) {