message MenuItem

Only read for checkbox.

A greyed row that is still shown, which is the point: "Maximize" missing from a fullscreen window's menu moves every row below it, and a menu whose geometry changes with the window is a menu nobody builds muscle memory for.

What the client echoes back in MenuReply.chosen when this row is picked. Opaque to it, and meaningful only to the compositor that sent it. Never 0 for a row that can be chosen — 0 is how a reply says "dismissed", so an item with that id would be indistinguishable from the user pressing Escape.

0 for a row of the root menu. Otherwise the id of the submenu row this row sits under.

The list is flat because the wire has no recursion; the menu client builds the tree. A row whose parent is not a submenu in this same list is dropped rather than shown at the root — a parent that does not exist is a bug in the sender, and promoting the row would put a VPN's "Disconnect" next to "About".

Right-aligned accelerator label — "Alt+F4". Cosmetic: the compositor already has these bindings and the menu never matches on this string. Empty for a row with no chord.