The vty package

[Tags:bsd3, library, program]

vty is terminal GUI library in the niche of ncurses. It is intended to be easy to use, have no confusing corner cases, and good support for common terminal types.

Included in the source distribution is a program test/interactive_terminal_test.hs that demonstrates the various features.

If your terminal is not behaving as expected the results of the vty-interactive-terminal-test executable should be sent to the Vty maintainter to aid in debugging the issue.

Notable infelicities: Sometimes poor efficiency; Assumes UTF-8 character encoding support by the terminal;

Project is hosted on https:github.comcoreyoconnorvty

git clone git:github.comcoreyoconnorvty.git

© 2006-2007 Stefan O'Rear; BSD3 license.

© Corey O'Connor; BSD3 license.

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Versions 3.0.0, 3.0.1, 3.0.2, 3.0.4, 3.1.0, 3.1.2, 3.1.4, 3.1.6, 3.1.8,,, 4.0.0,,,,,,,,,,,,,,,,,, 4.7.1, 4.7.2, 4.7.3, 4.7.4, 4.7.5, 5.0.0, 5.0.1, 5.0.2, 5.1.0, 5.1.1, 5.1.3, 5.1.4, 5.2.0, 5.2.1, 5.2.2, 5.2.3, 5.2.4, 5.2.5, 5.2.6, 5.2.7, 5.2.8, 5.2.9, 5.2.10, 5.2.11, 5.3, 5.3.1, 5.4.0, 5.5.0
Change log CHANGELOG
Dependencies base (==4.*), bytestring, containers, deepseq (>=1.1 && <1.4), ghc-prim, mtl (>= && <2.2), parallel (>=2.2 && <3.3), parsec (>=2 && <4), string-qq, terminfo (>=0.3 && <0.5), unix, utf8-string (==0.3.*), vector (>=0.7) [details]
License BSD3
Maintainer Corey O'Connor (
Stability Unknown
Category User Interfaces
Home page
Uploaded Fri Mar 21 19:54:58 UTC 2014 by CoreyOConnor
Distributions Debian:5.4.0, LTSHaskell:5.5.0, NixOS:5.5.0, Stackage:5.5.0
Downloads 19426 total (177 in the last 30 days)
0 []
Status Docs available [build log]
Successful builds reported [all 1 reports]




Maintainer's Corner

For package maintainers and hackage trustees

Readme for vty

Readme for vty-4.7.5

vty is a terminal interface library.

Vty currently provides:

* Automatic handling of window resizes.

* Supports Unicode characters on output, automatically setting and
  resetting UTF-8 mode for xterm. Other terminals are assumed to support 

* Efficient output. 

* Minimizes repaint area, thus virtually eliminating the flicker
  problem that plagues ncurses programs.

* A pure, compositional interface for efficiently constructing display

* Automatically decodes keyboard keys into (key,[modifier]) tuples.

* Automatically supports refresh on Ctrl-L.

* Automatically supports timeout after 50ms for lone ESC (a barely
  noticable delay)

* Interface is designed for relatively easy compatible extension.

* Supports all ANSI SGR-modes (defined in console_codes(4)) with
  a type-safe interface. 

* Properly handles cleanup.

Current disadvantages:

* The character encoding of the output terminal is assumed to be UTF-8.

* Minimal support for special keys on terminals other than the
  linux-console.  (F1-5 and arrow keys should work, but anything
  shifted isn't likely to.)

* Uses the TIOCGWINSZ ioctl to find the current window size, which
  appears to be limited to Linux and *BSD.

Project is hosted on

git clone git://

To compile the demonstration program: ghc --make test/Test.hs gwinsz.c

The main documentation consists of the haddock-comments and the demonstration