MATE panel is being dragged when I touch it in the Cupertino layout

[archisman-panigrahi]

Cross posted from mate-desktop/mate-panel#1360. I am not sure whether this is a mate-panel bug, or just an issue with how the Cupertino layout is coded in mate-tweak, which is why I am reporting the issue here as well.

I have a touch screen laptop running Ubuntu MATE 22.04.

Expected behaviour

When I touch the MATE panel in the Cupertino layout, it should register mouse-click-like events in the panel, instead of dragging the panel.

Actual behaviour

When I accidentally touch on the MATE panel, the panel is dragged to another location, which is inconvenient, because sometimes I end up dislocating the panel while trying to move an window.

However, when I try to drag the panel with mouse, nothing happens (as expected).

This only seems to happen in the Cupertino layout.

Steps to reproduce the behaviour

Use Cupertino layout in Ubuntu MATE 22.04 in a touch screen computer.
Try to press anywhere in the panel.
The panel will be dragged instead of opening the menu/application.

MATE general version

1.26.2

Package version

1.26.2-1

Linux Distribution

Ubuntu MATE 22.04

Link to bugreport of your Distribution (requirement)

https://bugs.launchpad.net/ubuntu/+source/mate-panel/+bug/2008656

[archisman-panigrahi]

Turns out that this bug occurs when the appmenu (global menu) applet is in use.
The Contemporary layout is also affected.