A deliberate per-platform divergence, not a revert of ruling K1. That ruling
removed always-on-top because the owner smoked it on real Plasma Wayland and
the hint did nothing: a Wayland client cannot raise itself above other clients,
there is no such request in the core protocol, and Qt had nothing to send. On
Windows the same hint IS HWND_TOPMOST and does exactly what it says, so the pin
exists where the window manager can honour it and stays absent where it cannot.
Owner decision D8. `Qt::WindowStaysOnTopHint` is applied by SetWindowPos on the
existing HWND, so toggling it does not recreate the native window and costs
neither the geometry nor the transparent surface. The capsule already reserved
the slot, and Qt Rows omit invisible children, so the Linux and macOS layouts
are byte-identical.
Session-scoped by design: the pin does not survive a restart.
cc
vicrodh
c2272ad9f3