SCO Visual Tcl Reference Guide
Chapter 3, SCO Visual Tcl - graphical scripting language

Chapter 3
Chapter 3<P> SCO Visual Tcl - graphical scripting language SCO Visual Tcl - graphical scripting language

SCO Visual Tcl provides a high-level graphical scripting language for both character and graphical terminals. The SCO Visual Tcl system interprets the scripting language commands and calls appropriate low-level display functions. The graphical output is constructed through OSF/Motif, and the character output is rendered through curses. Using this scripting language allows construction of sophisticated graphical applications without the complexity of directly using OSF/Motif or curses.

SCO Visual Tcl is an extension to the Tcl scripting language. This document covers only the graphical SCO Visual Tcl commands that augment Tcl. See Chapter 1, ``Tcl - tool command language'' and Chapter 2, ``TclX - the Extended Tcl language'' for a detailed description of the non-graphical scripting elements.

This chapter describes:

The three executable binary components of the SCO Visual Tcl language.
The basic architecture of the SCO Visual Tcl language.
The general format of an SCO Visual Tcl application.
The callback data structure implemented by the SCO Visual Tcl language.
graphics resources used by the SCO Visual Tcl language.
Differences between graphical and character-based implementations of the SCO Visual Tcl language.
Navigational keys used by CHARM.
Widget options, including geometry, object, label, form, and dialog options.

Chapter 3 Chapter 3<P> SCO Visual Tcl - graphical scripting language SCO Visual Tcl - graphical scripting language

Chapter 3
Chapter 3<P> SCO Visual Tcl - graphical scripting language SCO Visual Tcl - graphical scripting language