Originway , I don't remember them exactly, that was long time ago and I don't have right now time to again dig into old source code revisions. I'm using it all the time, and I can only tell that this would be complex task for existing and so big project, but engine slowly evolves in right direction...
Originway, it was discussed so many times...
QT? QuickTime?
I've said properly, it was done wrong way and for weird reasons.
And is still used (but not for rendering).
Don't judge framework by wrong examples of use.
Originway, with current widgets API nothing is drop in replacement.
It would require some additional work (I think that a bit less if using Qt5) but with additional benefits (won't list it again, those that use Qt know ), if done properly.
Lord Apocalypse , you mean for in game widgets? First it is required to abstract current code (AFAIR Cyp/ made it's API a lot saner in some branch), and then we can try to replace it. :-) Do I need to say again that since we already require Qt then we should evaluate it for this use case (using 5.x...
effigy , nope, it's not yet ready for this stage (since it's still more like 2D viewer...), although creating them would be now much easier (after dropping unfinished and unmaintained 3D part, to be replaced by QGLViewer or something like that). I'm currently working on other projects since apparen...
testtest1 , as NoQ said, trying to do something advanced with current GUI code is waste of time (especially that hopefully it will be replaced sooner or later). Simple change of width of menu screens (so those could be a bit wider, so more UI texts could fit in, but still "compatible" with smallest...
Shadow Wolf TJC, yes, it would be really hard to not achieve this one not knowing that.
Achievements should be given only for things that are more exceptional.