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About LTK

LTK is a Common Lisp binding for the Tk graphics toolkit. It does not require any Tk knowledge for its usage. As it is written in pure Lisp, it is highly portable.

The LTK documentation can be read online or is available as a PDF here.

Visit the Ltk user mailinglist at Comments and suggestions for further development are very welcome.


To install ltk:

root # emerge -av dev-lisp/ltk

It is necessary to have a common lisp interpreter. There are many available in the repository but for purposes of this document we will use SBCL:

root # emerge -av dev-lisp/sbcl

The LTK library will be installed in /usr/share/common-lisp/source/ltk

A Simple Example

Here is a simple test program to see that it is working properly:

   test.lisp (lisp source code) - A simple test of LTK
#! /usr/bin/sbcl --script
(load "/usr/share/common-lisp/source/ltk/ltk")
(in-package :ltk)

Save the file and set it's permissions so that it can be executed:

user $ chmod +x ./test.lisp

Execute the file:

user $ ./test.lisp

You should see this test program if everything is working properly: