| Summary: | [Wayland] zwp_tablet_tool_v2.proximity_in() event is sent with the parent surface, not the subsurface where the event actually occurred | ||
|---|---|---|---|
| Product: | [Plasma] kwin | Reporter: | acct_cl |
| Component: | wayland-generic | Assignee: | Joshua Goins <josh> |
| Status: | RESOLVED FIXED | ||
| Severity: | minor | CC: | josh, nicolas.fella |
| Priority: | NOR | ||
| Version First Reported In: | 6.2.5 | ||
| Target Milestone: | --- | ||
| Platform: | Arch Linux | ||
| OS: | Linux | ||
| See Also: | https://bugs.kde.org/show_bug.cgi?id=498386 | ||
| Latest Commit: | https://invent.kde.org/plasma/kwin/-/commit/cbea602145d18760e70be264d54126a6ef7ee6e1 | Version Fixed/Implemented In: | |
| Sentry Crash Report: | |||
Needs a fix similar to https://invent.kde.org/plasma/kwin/-/merge_requests/2700 A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/7563 Git commit e3e6af69c64fc15b3a7a2f3ffa493d2f7315d374 by Xaver Hugl. Committed on 05/05/2025 at 16:23. Pushed by zamundaaa into branch 'master'. input: set the current surface correctly for tablet events It ignored subsurfaces and always used the root surface of the window. Related: bug 498386 M +6 -6 src/input.cpp M +4 -21 src/wayland/seat.cpp M +11 -6 src/wayland/surface.cpp M +2 -0 src/wayland/surface.h https://invent.kde.org/plasma/kwin/-/commit/e3e6af69c64fc15b3a7a2f3ffa493d2f7315d374 Git commit cbea602145d18760e70be264d54126a6ef7ee6e1 by Xaver Hugl. Committed on 05/05/2025 at 17:09. Pushed by zamundaaa into branch 'Plasma/6.3'. input: set the current surface correctly for tablet events It ignored subsurfaces and always used the root surface of the window. Related: bug 498386 (cherry picked from commit e3e6af69c64fc15b3a7a2f3ffa493d2f7315d374) M +6 -6 src/input.cpp M +4 -21 src/wayland/seat.cpp M +11 -6 src/wayland/surface.cpp M +2 -0 src/wayland/surface.h https://invent.kde.org/plasma/kwin/-/commit/cbea602145d18760e70be264d54126a6ef7ee6e1 |
SUMMARY My project uses subsurfaces attached to the layer-shell overlay (wlr-layer-shell protocol) with an empty input region. When the tablet tool's cursor enters that subsurface, zwp_tablet_tool_v2.proximity_in() is sent with the parent wl_surface (which, in this case, is the overlay with the empty input region). The protocol description for tablet_v2 doesn't mention how focus works with subsurfaces, but since it's a pointer-like device, I expect the same behavior as with wl_pointer STEPS TO REPRODUCE 1. Create a layer-shell overlay (e.g., wl_surface object ID 21) and attach subsurface (e.g., wl_surface object ID #300). 2. Move the tablet tool's cursor over the subsurface. 3. Check the console output while running with WAYLAND_DEBUG=1 or log the pointer of the received wl_surface. OBSERVED RESULT [1869288.535] {Default Queue} zwp_tablet_tool_v2#4278190081.proximity_in(42833, zwp_tablet_v2#4278190080, wl_surface#21) EXPECTED RESULT zwp_tablet_tool_v2.proximity_in with wl_surface#300 SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 6.2.5 KDE Frameworks Version: 6.10.0 Qt Version: 6.8.2 Kernel Version: 6.12.10-zen1-1-zen (64-bit) Graphics Platform: Wayland Processors: 16 × AMD Ryzen 9 5900HX with Radeon Graphics Memory: 31.2 GiB of RAM Graphics Processor: NVIDIA GeForce RTX 3080 Laptop GPU/PCIe/SSE2 ADDITIONAL INFORMATION Project that can be used to demonstrate the issue: https://github.com/CluelessCatBurger/wl_shimeji