Playing with NethGui since some days, I can have a start of course, but I’m facing about the lack of documentation. I know that it exists some pointers
- https://github.com/nethesis/nethserver-ui-examples
- http://dev.nethserver.org/nethgui/Documentation/Api/index.html
and maybe other but I don’t know their existence.
In fact like we were joking some time ago on IRC, a developer will never read the documentation, but he will read the code written by other, I’m doing the same thing. I have a nethserver with all modules installed and I look under the hood when I want to do something.
Not sure that method is scientific but it is workable 
Among the developer documentation, Nethgui should be better documented or at least more code possibilities could be added to the https://github.com/nethesis/nethserver-ui-examples.
I could have a start a day on this topic, but I’m not really a developer nor a PHP specialist and this documentation can not suffer wrong things…It is really critical.