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Framework-centric aircraft-agnostic avionics development

Canvas is FlightGear's new fully scriptable 2D drawing system that will allow you to easily create new instruments, HUDs and even GUI dialogs and custom GUI widgets, without having to write C++ code and without having to rebuild FlightGear.

Framework-centric aircraft-agnostic avionics development

Postby Hooray » Sat Jun 07, 2014 10:50 pm

Given the recent trend of having several MFD-related efforts without any kind of collaboration/code reuse going on here among our contributors (PFD, ND, Avidyne Entegra R9, EFB), I have started prototyping a generic MFD framework that is purely XML-based, inspired by discussions we've had over the last couple of weeks, and lessons learnt from the missions subsystem.

The whole thing works with building blocks like a screen, buttons, modes, pages, and page elements. It is intended to:
  • support multiple independent instances
  • be totally aircraft agnostic
  • support a pure dialog-driven mode
  • support skinning/theming

It is supposed to support modeling complex avionics like a PFD, ND, EFB, CDU etc - and, eventually, also the Avidyne Entegra R9.

It's currently just a prototype, but it gets away with very little code and we really only need a few more "skins" for common avionics.
I am willing to extend this over time and help maintain it if people can agree to use something like this.

It should be straightforward to allow such "MFDs" to be reloaded from disk at run-time, i.e. for more rapid prototyping.

The following screen shots will probably seem very familiar, but the GPSMap196 instrument shown here was constructed without using any Nasal code, it's just declarative PropertyList XML:

http://wiki.flightgear.org/Canvas_Glass_Cockpit_Efforts
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This screen shot shows the texture of the hard-coded KLN89 instrument used as a skin/theme for the MFD instrument, with a MapStructure-powered map shown.
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Thanks & all the best,
Hooray
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