PI

Appeared in Volume 7/1, February 1994

PI is a portable interface between Prolog applications and X Windows that aims to be independent from the Prolog engine, provided that it has a Quintus-like foreign function interface (such as SICStus, or YAP). It is mostly written in Prolog and is divided into two libraries:

• Edipo - the lower level interface to the Xlib functions, allows you to: create and manage windows; use graphical primitives; receive events.

• Ytoolkit - the higher level user interface toolkit, allows you to: create and manage graphical objects; define new classes of objects; handle user interaction.

The package is available via anonymous FTP from:
ftp://ftp.ncc.up.pt/pub/prolog/pi_1.2.tar.gz

Some improvements since the last version: a full port to Quintus Prolog; compatible with SICStus #8; C code compilable by gcc; an installation makefile; the demos are working in Quintus Prolog; problems with multi-files have been solved; unnecessary files have been removed; writestring/3 is now efficiently implemented; bitmap operations have been implemented; error handling.

You can send questions, comments, bug reports, etc to:

Zé Paulo Leal 
Universidade do Porto, CIUP
R.Campo Alegre, 823
4000 Porto, Portugal
Tel: +351 2 600 1672 x109
Fax: +351 2 600 3654
Email: zp@ncc.up.pt