[SailfishDevel] monitor systemd unit from qml

[Michael Fuchs]

Hi,

I would need some help, please.

I'm trying to monitor a systemd service unit via dbus from qml.

There is a signal "PropertiesChanged" defined but it doesn't get 
emitted, when I start or stop the service.

Code:
https://gist.github.com/fuchsmich/354af082fbc4577a4bf5

The GetAll method works and it returns the needed property 
org.freedesktop.systemd1.Unit.ActiveState.
So how can I listen to the change of ActiveState?

thanks,
Michael.