This is an old UI redraw strategy. It’s been used since the dawn of GUIs and is referred to as invalidation. Here’s an example of a standard GUI invalidation e

This is an old UI redraw strategy. It’s been used since the dawn of GUIs and is referred to as invalidation. Here’s an example of a standard GUI invalidation event: https://github.com/Planimeter/grid-sdk/blob/master/engine/client/gui/handlers.lua#L148 https://github.com/Planimeter/grid-sdk/blob/master/engine/cl... As you mentioned, most GUI software invalidates primarily on mouseovers, and individual components handle things like invalidation on focus.