I have continued the work on navigation UI and I think, as my proposal for it, its ready now in portrait mode. Source code is available at https://github.com/rinigus/whogo-maps/tree/navigator . It's written on the top of map matching PR (https://github.com/otsaloma/whogo-maps/pull/51) - so I would prefer to wait till map matching is out of the way before submitting it.

Its based on the work in https://talk.maemo.org/showpost.php?...&postcount=157 . Main differences in navigation mode: the scale bar rotated 90 degrees, right top corner shows ETA, speed limit sign in EU style, current road in default font.

So, anyone interested in testing it and give the feedback (whether everything makes sense, are the UI elements on the right spot, and so on), you are welcome to clone it onto your phone (tablet?) and run it using in whogo-maps folder and "navigator" branch.

I am planning to add support for the landscape mode as well, probably would take few days.