[osg-submissions] Changing the keys for StateSetManipulator

[Jean-Sébastien Guay]

Hello,

I changed osgGA::StateSetManipulator to mirror the 
osgViewer::StatsHandler and other handlers which allow you to change the 
key(s) you would press to get them to do something. Pretty simple change 
but useful in our context and possibly in others too.

Also attached is a modified osgViewer which demonstrates that it works. 
The StateSetManipulator functions are remapped to F1-F4. It also 
demonstrates that in the 'h' help, the Fn function keys get displayed 
incorrectly, but that's a fix for another time. :-)

Note that I didn't know what to do about the #if 
COMPILE_TEXENVFILTER_USAGE functionality, which seems like a relic from 
the past (based on the fact that it used the 'm' key which is now the 
threading mode). You can either just put the code back to defer a 
decision to later, or leave it as it is if you know it's not used 
anymore (and will not be in the foreseeable future).

Thanks,

J-S
-- 
______________________________________________________
Jean-Sebastien Guay    jean-sebastien.guay at cm-labs.com
                                http://www.cm-labs.com/
                         http://whitestar02.webhop.org/
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