Campaign OP gate 2 root cause: UiElement.HitTest walks siblings
front-to-back by z-order, so an OPEN UiMenu's extended button+popup
hit-test union was never consulted when a LATER sibling's rect overlapped
the popup area — on the Config tab every dropdown has rows below it, so
Resolution-item clicks toggled the Full Screen / VSync rows underneath
(the gate session's persisted fullscreen/vsync flips were exactly those
stolen clicks). Latent since UiMenu existed; vendor/chat menus only
worked by z-order luck.
Fix: UiMenu's open/close now registers with UiRoot (SetActivePopup /
ClearActivePopup); a registered popup gets FIRST claim on mouse-down,
scroll, and hover routing; a press outside a live popup dismisses it and
is SWALLOWED (the dismissing click must not act on what sat underneath);
hidden/detached owners self-heal the registration on the next pointer
event. UiMenu gains the IsOpen seam and a single SetOpen writer.
Also in this commit, from the same investigation:
- SilkRuntimeDisplayWindowTarget.Apply documents the fullscreen half
honestly: IViewProperties.VideoMode is READ-ONLY, so a resolution pick
while fullscreen cannot switch the display mode through Silk's
abstract API — split out as #376 (native glfwSetWindowMonitor port)
rather than half-shipping untested native interop at a gate tail.
- Gate script §OP6 step 8 re-scoped: test resolution in WINDOWED mode.
Regressed by tests/AcDream.App.Tests/UI/UiMenuPopupRoutingTests.cs —
4 tests driving the real UiRoot input path on a mounted overlapping
tree, with an in-test overlap CONTROL click so the popup assertions
cannot pass vacuously (the #372 lesson: only mount+drive-input tests
catch this class; every fixture-conformance test stayed green through
this bug).
Full Release suite: 13,081 passed / 4 skipped / 0 failed.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
