VVS HudList parity (docs/research/vtank-kb/08-ui-views.md 2-3): <list>
accepts <column type="text|check|icon" width=... [iconkind] [colors]/>
children, each binding its own per-row source parallel to the row count.
Row count is the longest bound column; a click in a text column selects
(the list's own selected/onchange, unchanged), a click in a check/icon
column fires that column's own required onchange/onclick with the row
index and does NOT change selection. Last column always absorbs the
remaining width, recomputed live off the list's own Width rather than
baked in at Build. Per-cell horizontal clipping via UiRenderContext's
existing PushClip/PopClip. The check-column glyph reuses <toggle>'s own
five-band lamp primitive (UiMarkupToggle.DrawLamp/colors promoted from
private to internal) so it looks like every other checkbox. Unknown
column type, a missing required column binding, <column> combined with
the legacy items/icons/colors list attributes, or any non-<column> child
of <list> all throw FormatException at Build. A column-less <list> is
byte-for-byte the original single-text-column widget (new if/Columns
branch in OnDraw/OnEvent; the legacy branch's code is untouched).
New UiMarkupListColumn model (src/AcDream.App/UI/UiMarkupListColumn.cs)
carries each column's kind/width/bindings; MarkupDocument's `list` case
now builds either the legacy single-column fields or a Columns list,
never both. MarkupListColumnsTests (27 new tests) cover parse/binding
validation, draw-level column-offset/clipping/check-glyph/icon pins
against the recording renderer, hit-test routing, and a backward-
compatibility proof (a column-less list built through MarkupDocument
produces a byte-identical draw record to a hand-built UiMarkupList with
equivalent fields). Every new assertion was verified to fail first via
targeted temporary mutations (hit-test isolation, clip removal, last-
column-absorbs-remainder, required onchange/onclick, row-count = max),
each reverted after confirming failure.
docs/plugin-ui-markup.md gets a full Columns section (attribute grammar,
a Monsters-tab-style example, the no-header-row idiom, backward
compatibility) and the old single-text-column LIMITATION note is
retired; the bindings truth table gains the six new column-attribute
rows.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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