UXTableRow

UXTableRow is the selectable line of a UXTableView. Its only drawing job is the selection highlight: a filled band that the cells draw their text over (a parent paints before its children). No realized object draws the highlight, so the row does.

Its mouseDown implements the list conventions on every backend. A plain press selects the row (the anchor) and begins the modal drag-select sweep. With multi-selection on, ctrl toggles the row and shift extends from the anchor. The native tables (AppKit, Win32) implement the same conventions themselves and never route through here.

The table’s newRow hook constructs rows. UXOutlineView overrides it to make UXOutlineRows, which draw disclosure triangles.