'\"
'\" Generated from file 'receive\&.man' by tcllib/doctools with format 'nroff'
'\" Copyright (c) 2006 Andreas Kupries <andreas_kupries@users\&.sourceforge\&.net>
'\"
.TH "term::receive" 3tcl 0\&.1 tcllib "Terminal control"
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.BS
.SH NAME
term::receive \- General input from terminals
.SH SYNOPSIS
package require \fBTcl  8\&.4\fR
.sp
package require \fBterm::receive  ?0\&.1?\fR
.sp
\fB::term::receive::getch\fR ?\fIchan\fR?
.sp
\fB::term::receive::listen\fR \fIcmd\fR ?\fIchan\fR?
.sp
\fIcmd\fR \fBprocess\fR \fIstring\fR
.sp
\fIcmd\fR \fBeof\fR
.sp
\fB::term::receive::unlisten\fR ?\fIchan\fR?
.sp
.BE
.SH DESCRIPTION
This package provides the most primitive commands for receiving
characters to a terminal\&. They are in essence convenient wrappers
around the builtin commands \fBread\fR and \fBfileevent\fR\&.
.TP
\fB::term::receive::getch\fR ?\fIchan\fR?
This command reads a single character from the channel with handle
\fIchan\fR and returns it as the result of the command\&.
.sp
If not specified \fIchan\fR defaults to \fBstdin\fR\&.
.sp
It is the responsibility of the caller to make sure that the channel
can provide single characters\&. On unix this can be done, for example,
by using the command of package \fBterm::ansi::ctrl::unix\fR\&.
.TP
\fB::term::receive::listen\fR \fIcmd\fR ?\fIchan\fR?
This command sets up a filevent listener for the channel with handle
\fIchan\fR and invokes the command prefix \fIcmd\fR whenever
characters have been received, or EOF was reached\&.
.sp
If not specified \fIchan\fR defaults to \fBstdin\fR\&.
.sp
The signature of the command prefix is
.RS
.TP
\fIcmd\fR \fBprocess\fR \fIstring\fR
This method is invoked when characters were received, and \fIstring\fR
holds them for processing\&.
.TP
\fIcmd\fR \fBeof\fR
This method is invoked when EOF was reached on the channel we listen
on\&.  It will be the last call to be received by the callback\&.
.RE
.TP
\fB::term::receive::unlisten\fR ?\fIchan\fR?
This command disables the filevent listener for the channel with handle
\fIchan\fR\&.
.sp
If not specified \fIchan\fR defaults to \fBstdin\fR\&.
.PP
.SH "BUGS, IDEAS, FEEDBACK"
This document, and the package it describes, will undoubtedly contain
bugs and other problems\&.
Please report such in the category \fIterm\fR of the
\fITcllib Trackers\fR [http://core\&.tcl\&.tk/tcllib/reportlist]\&.
Please also report any ideas for enhancements you may have for either
package and/or documentation\&.
.PP
When proposing code changes, please provide \fIunified diffs\fR,
i\&.e the output of \fBdiff -u\fR\&.
.PP
Note further that \fIattachments\fR are strongly preferred over
inlined patches\&. Attachments can be made by going to the \fBEdit\fR
form of the ticket immediately after its creation, and then using the
left-most button in the secondary navigation bar\&.
.SH KEYWORDS
character input, control, get character, listener, receiver, terminal
.SH CATEGORY
Terminal control
.SH COPYRIGHT
.nf
Copyright (c) 2006 Andreas Kupries <andreas_kupries@users\&.sourceforge\&.net>

.fi