[Wayland-bugs] [Bug 765907] New: [Wayland] Reversed scrolling in GtkMenu

[gtk+ (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=765907

            Bug ID: 765907
           Summary: [Wayland] Reversed scrolling in GtkMenu
    Classification: Platform
           Product: gtk+
           Version: unspecified
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: Backend: Wayland
          Assignee: gtk-bugs at gtk.org
          Reporter: ofourdan at redhat.com
        QA Contact: gtk-bugs at gtk.org
                CC: rob at robster.org.uk, wayland-bugs at lists.freedesktop.org
     GNOME version: ---

Created attachment 327159
  --> https://bugzilla.gnome.org/attachment.cgi?id=327159&action=edit
Simple reproducer program

This is a follow up of bug 764595

When there are a lot of entries in a GtkMenu, using the mouse wheel under
Wayland to scroll through the list moves the items in the wrong (natural)
direction.

Also, using the touchpad to scroll through the list of entries is very slow. 

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 themouse
wheel of the touchpad.

Expected results:

When using the mouse wheel, the items scroll in the expected direction.
Using the touchpad, the entries scroll fast enough.

Actual results:

Mouse wheel scrolls in the opposite direction, and scrolling with the touchpad
is very slow.

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