Method startRotate

src/main/java/ui/VirtualCanvas.java:495–514

(int max, VirtualList list)

    }

    public static void startRotate(int max, VirtualList list) {

        if (instance == null) {
            instance = new TimerTaskRotate();
        }

        if (max < 0) {
            //instance.destroyTask();
            list.offset = 0;
            return;
        }

        synchronized (instance) {
            list.offset = 0;
            instance.scrollLen = max;
            instance.scrollline = (max > 0);
            instance.attachedList = list;
            instance.scroll = 1;
        }
    }

    public void run() {