[Merge] lp:~unity-team/platform-api/devel-for-qtmircompositor into lp:platform-api

[kevin gunn]

> > Few things:
> >
> > 1. If we can avoid breaking ABI, lets avoid breaking ABI. Please lets just
> add
> > new functions for window event handling in addition to the existing input
> > event ones, just mark them as deprecated in their comments. Not a big
> > commitment to ABI stability, but in this case it looks relatively easy to
> > *not* break it.
> 
> And what are we gaining by keeping ABI compatibility? We are the sole
> consumers of platform-api currently, thus I don't see any real gain.
> 
> But I do see a big drawback of keeping ABI compatibility in this MP, which is
> ending up with clunkier API.
> 
> Take mir as an example: It's constantly breaking its API and ABI because it's
> a new project that is rapidly and constantly evolving. Freezing its API so
> early would severely hamper its evolution. I see the same for platform-api, as
> it's a thin wrapper of mir & others. It's an illusion to think you will get
> the API right right off the bat. So it's a moot point to enforce ABI stability
> right now IMHO.

I have to agree, I don't get it either. If we own the clients, why keep the deprecated methods in place & working ? How many clients are there ? just 1 (qtubuntu)?

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