Re: Check for a keypress

[Roger Ivie <rivie@...>]

On Fri, 29 Nov 2013, Jose Torre-Bueno wrote:
> Is there a way from inside Lua to check whether any key has been 
> pressed?  io.read() will get a line from the console but if there 
> is no input it pends waiting for input.  I would like to be able 
> to write a test that gets input if any is ready but would continue 
> if there is none.  It is not obvious to me if this can be done at all.

Well, "a way" encompasses a lot of territory.

I've done it in a variety of ways by writing little C functions callable
from Lua. I've done it using select and read on vxWorks, VMS, and Linux. 
I've done  it by snagging events on Windows. And I've done it on Linux 
by placing the keyboard in MEDIUMRAW mode, then using select and read.

So yeah, there's "a way", but it requires a bit of C support.
--
roger ivie
rivie@ridgenet.net