* allows listener to do any related processing that it needs to.
* <p>
* Each {@link ViewRenderListener} will be notified exactly once before every frame is rendered.
* <p>
* {@link ViewRenderListener} can determine if frame repaint is actually
* needed from its perspective. Frame will be rendered only if at least one listener says yes.
* allows listener to do any related processing that it needs to.
* <p>
* Each {@link ViewRenderListener} will be notified exactly once before every frame is rendered.
* <p>
* {@link ViewRenderListener} can determine if frame repaint is actually
* needed from its perspective. Frame will be rendered only if at least one listener says yes.