https://bugs.kde.org/show_bug.cgi?id=500520
Bug ID: 500520
Summary: Not following the xdg-shell protocol correctly
Classification: Frameworks and Libraries
Product: layer-shell-qt
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: aleix...@kde.org
Reporter: alan.griffi...@canonical.com
Target Milestone: ---
SUMMARY
Menus in lxqt-panel are positioned using an anchor rectangle that is not within
the parent geometry. This is not permitted by the protocol:
```
When the xdg_positioner object is used to position a child surface, the
anchor rectangle may not extend outside the window geometry of the
positioned child's parent surface.
```
STEPS TO REPRODUCE
1. Run the lxqt-panel with `WAYLAND_DEBUG=client`
2. Pull up a menu
OBSERVED RESULT
```
[1782416.373] {Default Queue} -> wl_compositor#4.create_surface(new id
wl_surface#43)
[1782417.605] {Default Queue} ->
wp_fractional_scale_manager_v1#16.get_fractional_scale(new id
wp_fractional_scale_v1#47, wl_surface#43)
[1782417.717] {Default Queue} -> xdg_wm_base#3.get_xdg_surface(new id
xdg_surface#42, wl_surface#43)
[1782417.764] {Default Queue} -> xdg_wm_base#3.create_positioner(new id
xdg_positioner#44)
[1782417.852] {Default Queue} -> xdg_positioner#44.set_anchor_rect(0, -550, 1,
1)
```
This is wrong: `set_anchor_rect(0, -550, 1, 1)`
EXPECTED RESULT
I'd expect the anchor rect to be the position of a widget in the parent window.
A position outside the window geometry with a size of 1x1 looks bogus. Other
parts of Qt seem to have this the way I expect (e.g. the qterminal menus)
SOFTWARE/OS VERSIONS
Fedora Linux: 42 (LXQt Prerelease)
Qt Version: 6
ADDITIONAL INFORMATION
Previous discussion at
https://github.com/lxqt/lxqt-wayland-session/pull/40#issuecomment-2666380287
Testing with ISO from
https://koji.fedoraproject.org/koji/buildinfo?buildID=2660492
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