QtSingleApplication on OS X + Windows?

[Kevin Funk]

Heya,

I'd like to get rid off the dbus-daemon process on OS X + Windows. But still 
be able to open files in an running KDevelop session.

The usual approach I've seen so far is to use the QtSingleApplication 
solution. Both both Krita and Qt Creator make use of it, successfully.

With QtApplication the first application started creates a shared memory 
segment, later instances just attach to it.

I'm asking this now because René tries to incorporate the "file open event" 
handling on OS X differently, as seen in [1]. QtSingleApplication would make 
this patch obsolete, plus provide the feature under Windows, too. I don't want 
to waste René efforts, rather invite him to play around with 
QtSingleApplication.

Opinions?

So, my plan:
* Don't use DBus on OS X + Windows 
* Instead add a copy of QtSingleApplication to kdevplatform.git
* Make KDevelopApplication inherit from QtSingleApplication on OS X + Win
* Get file-open event handling for free on both OS X + Windows

Drawbacks:
* Can't control KDevelop from the command-line via DBus on those platforms
  (but I think this is negligible)

[1] https://git.reviewboard.kde.org/r/126761/

-- 
Kevin Funk | kfunk at kde.org | http://kfunk.org
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