[plt-scheme] Scan key code in non-gui mode

nandehutu wrote:
> [...]
> Is it possible to write a routine that can
> detect a pressed key immediately and print out (byte or char) without
> having to press "enter"?
> [...]

Hello,

it is certainly possible, but heavily system dependent.

If you want to do this in a terminal on a POSIX compliant system, I
would suggest using the external stty program to set an appropriate
input/output mode before simply reading characters or bytes from the
terminal device using standard Scheme procedures. An example program is
attached to this message -- save the two modules in the same directory
and run mzscheme -t- keys.ss in a terminal to try it out.

In a Windows terminal window you would have to use some native C API to
achieve the same effect.

Ciao,
Thomas


-- 
When C++ is your hammer, every problem looks like your thumb.
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