NAME "Term::TermKey::Async" - terminal key input using "libtermkey" with "IO::Async" SYNOPSIS use Term::TermKey::Async qw( FORMAT_VIM KEYMOD_CTRL ); use IO::Async::Loop; my $loop = IO::Async::Loop->new(); my $tka = Term::TermKey::Async->new( term => \*STDIN, on_key => sub { my ( $self, $key ) = @_; print "Got key: ".$self->format_key( $key, FORMAT_VIM )."\n"; $loop->loop_stop if $key->type_is_unicode and $key->utf8 eq "C" and $key->modifiers & KEYMOD_CTRL; }, ); $loop->add( $tka ); $loop->loop_forever; DESCRIPTION This class implements an asynchronous perl wrapper around the "libtermkey" library, which provides an abstract way to read keypress events in terminal-based programs. It yields structures that describe keys, rather than simply returning raw bytes as read from the TTY device. This class is a subclass of "IO::Async::Handle", allowing it to be put in an "IO::Async::Loop" object and used alongside other objects in an "IO::Async" program. It internally uses an instance of Term::TermKey to access the underlying C library. For details on general operation, including the representation of keypress events as objects, see the documentation on that class. Proxy methods exist for normal accessors of "Term::TermKey", and the usual behaviour of the "getkey" or other methods is instead replaced by the "on_key" event. EVENTS The following events are invoked, either using subclass methods or CODE references in parameters: on_key $key Invoked when a key press is received from the terminal. The $key parameter will contain an instance of "Term::TermKey::Key" representing the keypress event. CONSTRUCTOR $tka = Term::TermKey::Async->new( %args ) This function returns a new instance of a "Term::TermKey::Async" object. It takes the following named arguments: term => IO or INT Optional. File handle or POSIX file descriptor number for the file handle to use as the connection to the terminal. If not supplied "STDIN" will be used. PARAMETERS The following named parameters may be passed to "new" or "configure": flags => INT "libtermkey" flags to pass to constructor or "set_flags". on_key => CODE CODE reference for the "on_key" event. METHODS $tk = $tka->termkey Returns the "Term::TermKey" object being used to access the "libtermkey" library. Normally should not be required; the proxy methods should be used instead. See below. $flags = $tka->get_flags $tka->set_flags( $flags ) $canonflags = $tka->get_canonflags $tka->set_canonflags( $canonflags ) $msec = $tka->get_waittime $tka->set_waittime( $msec ) $str = $tka->get_keyname( $sym ) $sym = $tka->keyname2sym( $keyname ) ( $ev, $button, $line, $col ) = $tka->interpret_mouse( $key ) $str = $tka->format_key( $key, $format ) $key = $tka->parse_key( $str, $format ) $key = $tka->parse_key_at_pos( $str, $format ) $cmp = $tka->keycmp( $key1, $key2 ) These methods all proxy to the "Term::TermKey" object, and allow transparent use of the "Term::TermKey::Async" object as if it was a subclass. Their arguments, behaviour and return value are therefore those provided by that class. For more detail, see the Term::TermKey documentation. AUTHOR Paul Evans