pub fn extract_scrollbars(main: &mut World, render: &mut World)Expand description
Extract fn emitting one ExtractedScrollbar per crate::input::Scroll
container whose content overflows on an allowed axis and whose fade
alpha is above zero. Geometry comes from the shared
crate::input::vertical_scrollbar / crate::input::horizontal_scrollbar
math so painted pixels and hit regions always agree. All visuals
(colors, thickness, minimums) resolve through
crate::input::ScrollbarStyle - CSS scrollbar-color /
scrollbar-width per container, with the component’s Default as
the no-stylesheet fallback.