Bug 438972

Summary:	The zwp_pointer_gestures_v1 protocol is broken with GTK
Product:	[Plasma] kwin	Reporter:	Robert Mader <robert.mader>
Component:	wayland-generic	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED UPSTREAM
Severity:	normal
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Other
OS:	Linux
URL:	https://gitlab.gnome.org/GNOME/gtk/-/merge_requests/3693
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Robert Mader 2021-06-21 03:22:05 UTC

SUMMARY

GTK3/4 as well as Mutter and wlroots (oddly not Weston) implement the zwp_pointer_gestures_v1 protocol to allow pinch and zoom gestures on touchpads. It is used in apps such as Firefox, Gnome Web and evince and allows to make the touchpad experience match closer that of other OSes. It would be great to have it supported in Kwin as well.

https://gitlab.freedesktop.org/wayland/wayland-protocols/-/blob/main/unstable/pointer-gestures/pointer-gestures-unstable-v1.xml

Comment 1 Robert Mader 2021-06-21 03:42:03 UTC

Firefox tracking bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1717391

Comment 2 Robert Mader 2021-06-21 03:51:04 UTC

P.S. as little extra motivation: one of the main Firefox Webrender devs runs KDE and would love to debug pinch zoom on his main device :) So implementing would make some people very happy.

Comment 3 Robert Mader 2021-06-21 06:23:33 UTC

Urgh, sorry, it's already supported - just something with GTK is broken, on either side.

Comment 4 Vlad Zahorodnii 2021-06-21 06:58:29 UTC

kwin implements the pointer-gestures protocol. It seems like a GDK bug.