Spinner inside a Component Render() function

[mavam]

Is it possible to put a spinner() into a Render() function of a component? The naive approach didn't work:

    auto Render() -> Element override {
      return spinner(15, step_++);
    }

The shipped examples only show how you can redraw the entire screen by sleeping from a thread. Is there a way to control to control the refresh rate from within a component that drives Render calls by the main loop? Or maybe use a steady clock within the component to set an internal refresh rate by something along the lines of if ((now - last_update_) > 1s)?

When I move the mouse over the component, I actually see the animation. So what I'm asking is perhaps: can a component generate (custom) events at given pulse?