term::receive -
General input from terminals
package require Tcl 8.4
package require term::receive ? 0.1 ?
::term::receive::getch ? chan ?
::term::receive::listen cmd ? chan ?
cmd process string
cmd eof
::term::receive::unlisten ? chan ?
This package provides the most primitive commands for receiving
characters to a terminal. They are in essence convenient wrappers
around the builtin commands
read and
fileevent.
-
::term::receive::getch ? chan ?
-
This command reads a single character from the channel with handle
chan and returns it as the result of the command.
If not specified chan defaults to stdin.
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 term::ansi::ctrl::unix.
-
::term::receive::listen cmd ? chan ?
-
This command sets up a filevent listener for the channel with handle
chan and invokes the command prefix cmd whenever
characters have been received, or EOF was reached.
If not specified chan defaults to stdin.
The signature of the command prefix is
-
cmd process string
-
This method is invoked when characters were received, and string
holds them for processing.
-
cmd eof
-
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.
-
::term::receive::unlisten ? chan ?
-
This command disables the filevent listener for the channel with handle
chan.
If not specified chan defaults to stdin.
This document, and the package it describes, will undoubtedly contain
bugs and other problems.
Please report such in the category
term of the
http://sourceforge.net/tracker/?group_id=12883.
Please also report any ideas for enhancements you may have for either
package and/or documentation.
terminal, control, character input, listener, receiver, get character