tunnel and bubble routed event system

    public static void doHandleMouseMovement(Control topControl, Vector2d oldPos, Vector2d newPos) {
        List<TunnelHitPair> tunnelList = new ArrayList<TunnelHitPair>();
        TunnelHitPair top = new TunnelHitPair(topControl);
        top.hitNewPos = topControl.getScreenRegion().intersects(newPos);
        top.hitOldPos = topControl.getScreenRegion().intersects(oldPos);
        tunnelList.add(top);
        doDoubleMouseHitScan(topControl, oldPos, newPos, tunnelList);
        MouseMoveEvent event = new MouseMoveEvent(oldPos.copy(), newPos.copy());
        for(int i = 0, len = tunnelList.size(); i < len; i++) {
            if (event.isCancelled()) {
                GuiGLEngine.getInstance().getMouse().setPosition(oldPos.x, oldPos.y);
                return;
            }

            TunnelHitPair hit = tunnelList.get(i);
            Control control = hit.control;
            if (hit.hitNewPos && hit.hitOldPos) {
                if (control.isMouseOver) {
                    control.onPreviewMouseMove(event);
                    control.eventPreviewOnMouseMove.raise(event);
                }
                else {
                    control.isPreviewMouseOver = true;
                    control.onPreviewMouseEnter(event);
                    control.eventPreviewOnMouseEnter.raise(event);
                }
            }
            else if (hit.hitNewPos) {
                control.isPreviewMouseOver = true;
                control.onPreviewMouseEnter(event);
                control.eventPreviewOnMouseEnter.raise(event);
            }
            else if (hit.hitOldPos) {
                control.isPreviewMouseOver = false;
                control.onPreviewMouseLeave(event);
                control.eventPreviewOnMouseLeave.raise(event);
            }
        }

        for (int i = tunnelList.size() - 1; i >= 0; i--) {
            if (event.isHandled()) {
                break;
            }

            TunnelHitPair hit = tunnelList.get(i);
            Control control = hit.control;
            control.isPreviewMouseOver = false;
            if (hit.hitNewPos && hit.hitOldPos) {
                if (control.isMouseOver) {
                    control.onMouseMove(event);
                    control.eventOnMouseMove.raise(event);
                }
                else {
                    control.isMouseOver = true;
                    control.onMouseEnter(event);
                    control.eventOnMouseEnter.raise(event);
                }

                if (control.isHittable(event.getNewRelativeTo(control), newPos)) {
                    event.setHandled(true);
                }
            }
            else if (hit.hitNewPos) {
                control.isMouseOver = true;
                control.onMouseEnter(event);
                control.eventOnMouseEnter.raise(event);
                if (control.isHittable(event.getNewRelativeTo(control), newPos)) {
                    event.setHandled(true);
                }
            }
            else if (hit.hitOldPos) {
                control.isMouseOver = false;
                control.onMouseLeave(event);
                control.eventOnMouseLeave.raise(event);
                if (control.isHittable(event.getNewRelativeTo(control), newPos)) {
                    event.setHandled(true);
                }
            }
        }
    }