DECUS Heritage

Version: September 1986
Author: Roger Anderson, Lawrence Livermore National Lab.
Operating System: VAX/VMS V4.3
Source Language: PRAXIS
Keywords: Editors
Software Requirements: No other software is needed for use. Will need PRAXIS compiler to modify.
Hardware Requirements: VT100 terminal

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Abstract: The BLOCKER block diagram utility was written in the interest of promoting better software documentation. It allows the user to easily create block diagrams which can be stored within software source text files and printed out with standard line printing devices. In this way, sketches which are often drawn on paper during software coding can be kept in an organized manner for later reference.

The block diagram editor provides a "worksheet" of 132 columns by 500 lines, which can be loaded with an existing 80- or 132-column text file, drawn on with the block diagram editor functions, then saved to a text file for later inclusion in source code. It enables the user to move lines, text, and boxes and their contents around in the worksheet, singly or in groups. Existing connecting lines to other screen elements are maintained by shrinking or stretching those lines as required.

The block diagram editor enables the user to "cut" any given rectangle from the diagram and "paste" it back in any other position. It has some of the standard Digital Equipment Corporation VAX/VMS - EDT keypad functions, such as deleting and undeleting lines, words and characters, and backing up and advancing by words, characters and pages.

BLOCKER is written in the PRAXIS programming language. It runs on VT100 compatible terminals under version 4.3 of the VMS operating system on VAX computers.

Click on FTP to download from the FTP Achives.

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Last Update: Thu Jan 11 18:26:30 1996