Module segmented 

VAPP-162 (docs/round-5-contract.md §3): Segmented orientation: vertical and option.count. A vertical bar is THE navigation rail: a column of fixed items (item = the rail’s width, 72 in every built-in theme, × $control.tabBar), laid out by the core (layout_tree). A bar item’s count is a badge at its icon’s top-end corner.

Functions

badge_text

The badge text of an option’s count (99+ above 99); None when unset, not a positive number, or 0 (hidden). Only bar items paint it.

is_rail

Whether the Segmented is the navigation rail (a vertical bar).

is_vertical

Whether the Segmented stacks its segments top to bottom.

item_accessibility_label

The accessibility name of an item: the label, then the count (“Chats, 3”), when the item shows a badge.

item_count

The object options a Segmented paints.

option_badge

The badge of an option on a Segmented of variant (only bar paints one).

rail_height

The rail’s height: one tab_bar item per option.

rail_item

The item box of a rail at index (x, y, w, h) inside a rail width wide.