/*--------------------------------------------------------------------------------------------*/
        public virtual void TreeUpdate()
        {
            HoverItem hoverItem = GetComponent <HoverItem>();

            DestroyRenderersIfNecessary();
            TryRebuildWithItemType(hoverItem.ItemType);

            ////

            HoverItemHighlightState highState      = GetComponent <HoverItemHighlightState>();
            HoverItemSelectionState selState       = GetComponent <HoverItemSelectionState>();
            HoverRenderer           activeRenderer = ((HoverRenderer)ButtonRenderer ?? SliderRenderer);

            UpdateRenderer(activeRenderer, hoverItem);
            UpdateRendererCanvas(activeRenderer, hoverItem);
            UpdateRendererIndicator(activeRenderer, highState, selState);

            if (ButtonRenderer != null)
            {
                UpdateButtonSettings(highState);
            }

            if (SliderRenderer != null)
            {
                UpdateSliderSettings(hoverItem);
                UpdateSliderSettings(hoverItem, highState);
            }

            Controllers.TryExpireControllers();
        }
        /*--------------------------------------------------------------------------------------------*/
        private void UpdateRendererIndicator(HoverRenderer pRenderer,
                                             HoverItemHighlightState pHighState, HoverItemSelectionState pSelState)
        {
            HoverIndicator rendInd = pRenderer.GetIndicator();

            rendInd.Controllers.Set(HoverIndicator.HighlightProgressName, this);
            rendInd.Controllers.Set(HoverIndicator.SelectionProgressName, this);

            rendInd.HighlightProgress = pHighState.MaxHighlightProgress;
            rendInd.SelectionProgress = pSelState.SelectionProgress;

            if (pSelState.WasSelectedThisFrame)
            {
                rendInd.LatestSelectionTime = DateTime.UtcNow;
            }
        }