[Wayland-bugs] [Bug 765939] [Wayland] very slow scrolling in GtkMenu using the touchpad

[gtk+ (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=765939

Carlos Garnacho <carlosg at gnome.org> changed:

           What    |Removed                     |Added
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 Attachment #327235|none                        |reviewed
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--- Comment #7 from Carlos Garnacho <carlosg at gnome.org> ---
Comment on attachment 327235
  --> https://bugzilla.gnome.org/attachment.cgi?id=327235
[PATCH 2/2] gtkmenu: ignore emulated scroll events

I think you could do with the if (!_gdk_event_get_pointer_emulated(...)) check
on the top of the function, we also want to avoid the case of x11 drivers
sending both 4-7 button and smooth scroll events with mouse wheels (in that
case the latter has the "emulated" flag)

Multiplying the smooth scroll value by MENU_SCROLL_STEP2 sounds alright, I'm
not sure I like much obeying delta_x though :). IMO it's better to obey only
the axis that matches visually when we know the device can do both, otherwise
scrolling along the right diagonal would/could make scrolling jump between
upwards and downwards.

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