https://bugzilla.gnome.org/show_bug.cgi?id=765939
Bug ID: 765939
Summary: [Wayland] very slow scrolling in GtkMenu using the
touchpad
Classification: Platform
Product: gtk+
Version: unspecified
OS: Linux
Status: NEW
Severity: normal
Priority: Normal
Component: Widget: GtkMenu
Assignee: [email protected]
Reporter: [email protected]
QA Contact: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected]
GNOME version: ---
Created attachment 327221
--> https://bugzilla.gnome.org/attachment.cgi?id=327221&action=edit
Simple reproducer for testing purpose.
+++ This bug was initially created as a clone of Bug #765907 +++
This is a follow up on bug 765907 which was a follow up on bug 765907 as well
Using the touchpad to scroll through the list of entries is very slow under
Wayland.
No such issue under X11.
Attaching a simple reproducer.
Steps to reproduce:
1. Save and build the source
$ gcc menuitems.c -o menuitems -Wall `pkg-config gtk+-3.0 --cflags --libs`
2. Run under Wayland
3. Open the menu and try to scroll through the list of entries using the
scrolling on the touchpad.
Expected results:
Using the touchpad, the entries scroll fast enough.
Actual results:
Scrolling with the touchpad is very slow on Wayland.
Additional data:
GtkMenu uses both SCROLL_UP/DOWN events and SCROLL_SMOOTH events, but gets (and
uses) only smooth events on Wayland, so it's much slower on Wayland than on
X11.
The solution would be to use only non-emulated events smooth events and adjust
the scroll velocity in GtkMenu.
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