Global menus switch to local menus when hud is used

[ubuntu-mate]

Global menus switch to local menus when hud is used

[vkareh]

I can confirm this.

The mate-hud checks whether appmenu-mate is running before deciding to kill the appmenu-registrar, but I cannot see such a process in my system. Did something change in vala-panel-appmenu?

To fix this, I think we should verify whether the registrar process was running prior to the hud starting it, then killing it only if it wasn't. Regardless of the existence of appmenu-mate.

Other thoughts:
I wonder if we want to synchronize the monitor setting with the global menu configuration. Rofi supports the following modes:

$ man rofi
...
-monitor name
 Select monitor to display rofi on. It accepts as input: primary (if primary output is set), the xrandr output name, or integer number (in order of detection). Negative numbers  are  handled  differently:
•   -1: the currently focused monitor.
•   -2: the currently focused window (that is, rofi will be displayed on top of the focused window).
•   -3: Position at mouse (overrides the location setting to get normal context menu behavior.)
•   -4: the monitor with the focused window.
•   -5: the monitor that shows the mouse pointer.

We currently use -monitor 2, but we could change it to primary or -4 when global menus are enabled.

Thoughts?

[vkareh]

Update, turns out vala-panel-appmenu moved to in-process, making it harder to determine if the process is running: https://gitlab.com/vala-panel-project/vala-panel-appmenu/commit/c5d20e73d47ea4805697553401fcb7633fc402ac, and causing this regression in the first place.