Good work! thanks for your sharing. ;)
On Fri, Oct 14, 2011 at 7:37 AM, Barry Brevik <[email protected]>wrote:
> 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 ($keyCode == 37) {print "LEFT ARROW key released.\n\n";}
> if ($keyCode == 38) {print "UP ARROW key released.\n\n";}
> if ($keyCode == 39) {print "RIGHT ARROW key
> released.\n\n";}
> if ($keyCode == 40) {print "DOWN ARROW key released.\n\n";}
> if ($keyCode == 45) {print "INS key released.\n\n";}
> if ($keyCode == 46) {print "DEL key released.\n\n";}
> if ($keyCode == 91) {print "LEFT WINDOWS key
> released.\n\n";}
> if ($keyCode == 92) {print "RIGHT WINDOWS key
> released.\n\n";}
> if ($keyCode == 93) {print "CONTEXT key released.\n\n";}
> if ($keyCode == 112) {print "F1 released.\n\n";}
> if ($keyCode == 113) {print "F2 released.\n\n";}
> if ($keyCode == 114) {print "F3 released.\n\n";}
> if ($keyCode == 115) {print "F4 released.\n\n";}
> if ($keyCode == 116) {print "F5 released.\n\n";}
> if ($keyCode == 117) {print "F6 released.\n\n";}
> if ($keyCode == 118) {print "F7 released.\n\n";}
> if ($keyCode == 119) {print "F8 released.\n\n";}
> if ($keyCode == 120) {print "F9 released.\n\n";}
> if ($keyCode == 121) {print "F10 released.\n\n";}
> if ($keyCode == 122) {print "F11 released.\n\n";}
> if ($keyCode == 123) {print "F12 released.\n\n";}
> if ($keyCode == 144) {print "NUM LOCK released.\n\n";}
> if ($keyCode == 145) {print "SCROLL LOCK released.\n\n";}
> }
>
> elsif ($keyValue >= 0x7f)
> {
> # High line draw chars etc fall in here.
> print "High char released.\n\n";
> }
>
> else
> {
> if ($keyValue == 8) {print "BACKSPACE key
> released.\n\n";}
> elsif ($keyValue == 9) {print "TAB key released.\n\n";}
> elsif ($keyValue == 13) {print "ENTER key released.\n\n";}
> elsif ($keyValue == 27) {print "ESC key released.\n\n";}
> else
> {
> my $keyChr = chr($keyValue);
> print "Char released: $keyChr\n\n\n\n";
> }
> }
> }
> }
> }
> }
>
> # I made the delay 3 seconds so you can see what
> # happens when you enter multiple characters
> # outside of the INPUT loop.
> print "ongoing task.\n";
> select undef, undef, undef, 3;
> }
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