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-
- =head1 NAME
-
- Tk::IO - high level interface to Tk's 'fileevent' mechanism
-
- =for pm IO/IO.pm
-
- =for category Binding Events and Callbacks
-
- =head1 SYNOPSIS
-
- my $fh = Tk::IO->new(-linecommand => callback, -childcommand => callback);
- $fh->exec("command")
- $fh->wait
- $fh->kill
-
- =head1 WARNING
-
- INTERFACES TO THIS MODULE MAY CHANGE AS PERL'S IO EVOLVES
- AND WITH PORT OF TK4.1
-
- =head1 DESCRIPTION
-
- Tk::IO is now layered on perl's IO::Handle class. Interfaces
- have changed, and are still evolving.
-
- In theory C methods which enable non-blocking IO as in earlier Tk-b*
- release(s) are still there. I have not changed them to use perl's
- additional Configure information, or tested them much.
-
- Assumption is that B<exec> is
- used to fork a child process and a callback is called each time a
- complete line arrives up the implied pipe.
-
- "line" should probably be defined in terms of perl's input record
- separator but is not yet.
-
- The -childcommand callback is called when end-of-file occurs.
-
- $fh->B<wait> can be used to wait for child process while processing
- other Tk events.
-
- $fh->B<kill> can be used to send signal to child process.
-
- =head1 BUGS
-
- Still not finished.
- Idea is to use "exec" to emulate "system" in a non-blocking manner.
-
- =cut
-
-