Draft: Complete tablet support for Wayland

Work in progress...

See issue #123 (closed)

• Patched Fedora SRPM
• Copr package build

Talks

• https://gitlab.freedesktop.org/libinput/libinput/-/issues/824
• https://gitlab.freedesktop.org/wayland/wayland-protocols/-/issues/117
• https://gitlab.gnome.org/GNOME/gimp/-/issues/8890

Tablet Mode

• https://wayland.freedesktop.org/libinput/doc/latest/tablet-support.html#tablet-pad-modes
• https://wayland.app/protocols/tablet-unstable-v2#zwp_tablet_pad_group_v2:event:mode_switch

Implementation Tasks

• add tilt for pen
• add distance for pen, blocker: QTabletEvent doesn't support distance
• check tool capability
• fix missing messages in TabletSeatV2InterfacePrivate::sendPadAdded NEED HELP: implemented but any log
• add update mode NEED LIBINPUT AND WAYLAND FEEDBACK
• send initial mode NEED LIBINPUT AND WAYLAND FEEDBACK
• add ring
• add raw touch events
• found code quality issue for recurrent usage of a->b->c, does gcc optimize this ???

TODO

• compile patch on Fedora Copr 37

Test

• ...