acdream/docs
Erik 2de9cc1c19 docs(D.5.3/B.1): drag-drop spine design spec
Stream B.1 of the 2026-06-18 handoff — the shared widget-level drag-drop
infra that both shortcut-drag (B) and the inventory window (C) sit on.

Four design decisions confirmed with the user this session:
1. Payload = typed ItemDragPayload record snapshotted at drag-begin
   (ObjId/SourceKind/SourceSlot/SourceCell); SourceContainer derived at
   drop from ClientObjectTable (single source of truth).
2. Cursor ghost painted by UiRoot via a generic UiElement.GetDragGhost()
   hook — keeps UiRoot item-agnostic; floats above all windows.
3. Cell (UiItemSlot) is the drop-target hit unit + accept/reject overlay
   owner, delegating the decision + dispatch UP to its parent UiItemList's
   registered IItemListDragHandler (faithful to retail cell->ItemList_DragOver
   ->m_dragHandler; scales to the inventory N-cell grid).
4. PR ships infra + a visible toolbar STUB handler (logs, no wire) so the
   ghost/overlay/dispatch are confirmable this session; AddShortcut/Remove
   wire is Stream B.2.

Retail-grounded: InqDropIconInfo flags (&0xE==0 fresh / &4 reorder, reject
state 0x10000040) confirmed live at gmToolbarUI 0x004bd162; the cell
begin-drag/CatchDroppedItem/RegisterItemListDragHandler chain at decomp
229344/229744/230461. Planned register rows: AP-47 (ghost reuses full icon
at reduced alpha vs retail m_pDragIcon) + TS-33 (toolbar drop stub pending
B.2). No new wire format in the spine itself.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-20 12:23:44 +02:00
..
architecture merge: bring main (A7 lighting Fix A–D + UN-7 + #140 Fix D) into the D.5 branch 2026-06-20 12:01:20 +02:00
audit docs: update audit — Sprint 1 items verified (sequence counters + scenery LCG) 2026-04-13 13:51:39 +02:00
plans docs(D.5.4): roadmap shipped + divergence register (event model + deferred parent pre-queue) 2026-06-18 17:03:28 +02:00
research merge: bring main (A7 lighting Fix A–D + UN-7 + #140 Fix D) into the D.5 branch 2026-06-20 12:01:20 +02:00
superpowers docs(D.5.3/B.1): drag-drop spine design spec 2026-06-20 12:23:44 +02:00
bugs.md docs: update bugs.md — close BUG-002/003/004, add BUG-005/006/007 2026-04-14 12:17:31 +02:00
ISSUES.md merge: bring main (A7 lighting Fix A–D + UN-7 + #140 Fix D) into the D.5 branch 2026-06-20 12:01:20 +02:00