Reported from play with a video: hovering a bag item draws the enhanced tooltip
— MasterTradeSkills' recipe block, AdvancedTradeSkillWindow2's Bags/Bank/Total
— for about nine frames of sixty, then the plate falls back to the bare one and
stays bare while the cursor sits still.
The loop is stock. `ContainerFrameItemButton_OnUpdate` re-enters `..._OnEnter`
every `TOOLTIP_UPDATE_TIME` (`ContainerFrame.lua:693` in his own patch-4.mpq;
pfUI's bag slots are `ContainerFrameItemButtonTemplate`, so they run it too),
and each turn is `SetOwner` + `SetBagItem` — a clear that wipes every line an
addon appended. What puts them back in the reference is a hide/show pair, and
we had neither half: the `SetOwner` binding hides the plate before it even reads
the owner argument (`0x531179` zeroes the content gate at `+0xd0`, `0x531183`
calls `[vtable+0x84]` = `0x530a60`, which is the `SetOwner(NULL)` core plus the
base hide `0x76ad50`), and the content `Set*` re-shows it through the tooltip's
own Show override (`0x530a80`). So every rebuild raises `OnHide` then `OnShow`.
Ours cleared in place, and the base show early-outs on an already-visible frame
(`0x76ae3b`), so the plate never hid and the `OnShow` never came.
That is why exactly two addons lost their lines while others kept theirs:
`LibItemTooltip-1.0`, the tooltip contract of MasterTradeSkills and
Gromissingcrafts, hangs entirely on a scratch child frame of `GameTooltip`
listening for `OnShow`, where pfUI's ItemID and sell-price lines hook the `Set*`
methods themselves and so re-run on every refresh.
The reference also clears twice per `SetOwner` (once inside the hide, once in
the core) and so fires `OnTooltipCleared` twice; that falls out of calling the
same hide, and the existing lifecycle test already allowed for it.
Addresses read off the player's own `WoW.exe` with objdump, not from memory.
The new test is the hover loop in miniature — three turns of `SetOwner` + a
content `Set*` under a `LibItemTooltip`-shaped child probe — and fails on the
old behaviour with one `OnShow` instead of three.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SgstFWtn1RxEJ5kVrpgYwn
gromandClaude Opus 5
ed92574cea