Hi, this is a little snippet, that allows realtime single key control of a script, with Glib. It is just a basic outline. I post it, because it is tricky. If the readkey sub is in the main script, it will block the timer(rest of script) from functioning. With the readkey in the thread, the main script can process whatever you setup, and still watch for keycontrol. It might be useful in some situations..... like a panic button!!!! :-) 
#!/usr/bin/perl
use warnings;
use strict;
use Glib;
use Term::ReadKey;
use threads;
#use threads::shared;

$|++;
ReadMode('cbreak');

# works non-blocking if read stdin is in a thread
my $count = 0;
my $thr = threads->new(\&read_in)->detach;

my $main_loop = Glib::MainLoop->new;
my $timer  = Glib::Timeout->add (1000, \&timer_callback, undef, 1 );
# can also have filehandle watches
#my $watcher;
#$watcher = Glib::IO->add_watch( fileno( $pty ), ['in', 'hup'], \&call
+back);

$main_loop->run;
ReadMode('normal'); # restore normal tty settings

sub timer_callback{
     #do stuff
     $count++;
     print "\n$count\n";
    return 1;
}

sub read_in{
        while(1){
         my $char;
         if (defined ($char = ReadKey(0)) ) {
            print "\t\t$char->", ord($char),"\n";    
            #process key presses here
            #if($char eq 'q'){exit}
            if(length $char){exit}  # panic button on any key :-)
                
            }
          }
}

__END__

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In reply to Readkey with timer using Glib by zentara

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