Last week I had posted a query about getting keyboard input in a non
blocking way.
I received several replies, so I thought I would post back the code I
developed which seems to work.
This is not the code I will end up using; it is more like a proof of
concept program.
use strict;
use warnings;
use Win32::Console;
my $signame = '';
my $havebrk = 0;
$SIG{INT} = sub {$signame = $_[0]; $havebrk = 1;};# CTRL-C.
$SIG{BREAK} = sub {$signame = $_[0]; $havebrk = 1;};# CTRL-BREAK,
CTRL-ScrollLock.
my $STDIN = new Win32::Console(STD_INPUT_HANDLE);
$STDIN - Mode(ENABLE_PROCESSED_INPUT);
while (1)
{
if ($STDIN-GetEvents())
{
# We do this inner loop here to make shure that we read
# all of the characters in the key buffer.
while ($STDIN-GetEvents())
{
# Read console event.
my @input = $STDIN-Input();
# input[0] is the event type- 1 for keyboard, 2 for mouse. So what
is 0 for?
if (defined $input[0] and $input[0] == 1)
{
my ($eventType, $keyState, $keyCount, $keyCode, $scanCode,
$keyValue, $keyFlags) = @input;
if ($havebrk) {die User termination on signal $signame.\n\n;}
# KeyState of 1 means key down.
if ($keyState == 1)
{
if ($keyValue == 0x00)
{
# Most control keys fall in here.
if ($keyCode == 16) {print \nSHIFT key pressed.\n;}
if ($keyCode == 17) {print \nCTRL key pressed.\n;}
if ($keyCode == 18) {print \nALT key pressed.\n;}
if ($keyCode == 19) {print \nBREAK key pressed.\n;}
if ($keyCode == 20) {print \nCAPS LOCK key pressed.\n;}
if ($keyCode == 33) {print \nPG UP key pressed.\n;}
if ($keyCode == 34) {print \nPG DN key pressed.\n;}
if ($keyCode == 35) {print \nEND key pressed.\n;}
if ($keyCode == 36) {print \nHOME key pressed.\n;}
if ($keyCode == 37) {print \nLEFT ARROW key pressed.\n;}
if ($keyCode == 38) {print \nUP ARROW key pressed.\n;}
if ($keyCode == 39) {print \nRIGHT ARROW key pressed.\n;}
if ($keyCode == 40) {print \nDOWN ARROW key pressed.\n;}
if ($keyCode == 45) {print \nINS key pressed.\n;}
if ($keyCode == 46) {print \nDEL key pressed.\n;}
if ($keyCode == 91) {print \nLEFT WINDOWS key
pressed.\n;}
if ($keyCode == 92) {print \nRIGHT WINDOWS key
pressed.\n;}
if ($keyCode == 93) {print \nCONTEXT key pressed.\n;}
if ($keyCode == 112) {print \nF1 pressed.\n;}
if ($keyCode == 113) {print \nF2 pressed.\n;}
if ($keyCode == 114) {print \nF3 pressed.\n;}
if ($keyCode == 115) {print \nF4 pressed.\n;}
if ($keyCode == 116) {print \nF5 pressed.\n;}
if ($keyCode == 117) {print \nF6 pressed.\n;}
if ($keyCode == 118) {print \nF7 pressed.\n;}
if ($keyCode == 119) {print \nF8 pressed.\n;}
if ($keyCode == 120) {print \nF9 pressed.\n;}
if ($keyCode == 121) {print \nF10 pressed.\n;}
if ($keyCode == 122) {print \nF11 pressed.\n;}
if ($keyCode == 123) {print \nF12 pressed.\n;}
if ($keyCode == 144) {print \nNUM LOCK pressed.\n;}
if ($keyCode == 145) {print \nSCROLL LOCK pressed.\n;}
}
elsif ($keyValue = 0x7f)
{
# High line draw chars etc fall in here, however
# I was never able to get it to trigger.
print High char pressed.\n;
}
else
{
# *Almost* Everything else is a printable ASCII character.
if($keyValue == 8) {print BACKSPACE key pressed.\n;}
elsif ($keyValue == 9) {print TAB key pressed.\n;}
elsif ($keyValue == 13) {print ENTER key pressed.\n;}
elsif ($keyValue == 27) {print ESC key pressed.\n;}
else
{
# When here, presumably a printable character has been
pressed.
my $keyChr = chr($keyValue);
print \nChar pressed: $keyChr\n;
}
}
}
# KeyState of 0 means that a key was released.
elsif ($keyState == 0)
{
if ($keyValue == 0x00)
{
if ($keyCode == 16) {print SHIFT key released.\n\n;}
if ($keyCode == 17) {print CTRL key released.\n\n;}
if ($keyCode == 18) {print ALT key released.\n\n;}
if ($keyCode == 19) {print BREAK key released.\n\n;}
if ($keyCode == 20) {print CAPS LOCK key released.\n\n;}
if ($keyCode == 33) {print PG UP key released.\n\n;}
if ($keyCode == 34) {print PG DN key released.\n\n;}
if ($keyCode == 35) {print END key released.\n\n;}
if ($keyCode == 36) {print HOME key released.\n\n;}
if ($keyCode == 37) {print LEFT ARROW key
