Turbo Vision is a character-mode

text user interface In computing, text-based user interfaces (TUI) (alternately terminal user interfaces, to reflect a dependence upon the properties of computer terminals and not just text), is a retronym describing a type of user interface (UI) common as an ear ...

framework included with Borland Pascal,

Turbo Pascal Turbo Pascal is a software development system that includes a compiler and an integrated development environment (IDE) for the Pascal programming language running on CP/M, CP/M-86, and DOS. It was originally developed by Anders Hejlsberg at ...

, and

Borland C++ Borland C++ is a C and C++ IDE ( integrated development environment) for MS-DOS and Microsoft Windows. It was the successor to Turbo C++ and included a better debugger, the Turbo Debugger, which was written in protected mode DOS. Libraries ...

circa 1990. It was used by Borland itself to write the

integrated development environment An integrated development environment (IDE) is a software application that provides comprehensive facilities to computer programmers for software development. An IDE normally consists of at least a source code editor, build automation tools a ...

s (IDE) for these

programming language A programming language is a system of notation for writing computer programs. Most programming languages are text-based formal languages, but they may also be graphical. They are a kind of computer language. The description of a programming l ...

s. By default, Turbo Vision applications replicate the look and feel of these IDEs, including edit controls,

list box A list box is a graphical control element that allows the user to select one or more items from a list contained within a static, multiple line text box. The user clicks inside the box on an item to select it, sometimes in combination with the ...

es, check boxes,

radio button A radio button or option button is a graphical control element that allows the user to choose only one of a predefined set of mutually exclusive options. The singular property of a radio button makes it distinct from checkboxes, where the user ...

s and menus, all of which have built-in mouse support. Later it was deprecated in favor of

Object Windows Library The Object Windows Library (OWL) is a C++ object-oriented application framework designed to simplify desktop application development for Windows and (some releases) OS/2. OWL was introduced by Borland in 1991 and eventually deprecated in 1997 ...

, the Win16 API, and the GUI tools of

Borland Delphi Delphi is a general-purpose programming language and a software product that uses the Delphi dialect of the Object Pascal programming language and provides an integrated development environment (IDE) for rapid application development of desktop, ...

. Around 1997, the C++ version, including

source code In computing, source code, or simply code, is any collection of code, with or without comment (computer programming), comments, written using a human-readable programming language, usually as plain text. The source code of a Computer program, p ...

, was released by Borland into the

public domain The public domain (PD) consists of all the creative work to which no exclusive intellectual property rights apply. Those rights may have expired, been forfeited, expressly waived, or may be inapplicable. Because those rights have expired, ...

Tvision
''"What about copyrights? ..According to a FAQ entry in the Borland's site (was in http://www.inprise.com/devsupport/bcppbuilder/faq/QNA906.html when I saw it) the code is public domain. I also asked in the Borland's newsgroup and the TeamB people (not official people but they are who give technical support in the net) said me the FAQ was right."''Turbo Vision - by Borland Developer Support Staff
on community.borland.com/ ''"Question: Where can I find the public domain version of Turbo Vision? Answer: It can be found at ftp.inprise.com/pub/borlandcpp/devsupport/archive/turbovision/"'' (1998, archived) and is currently being ported and developed by an

open-source Open source is source code that is made freely available for possible modification and redistribution. Products include permission to use the source code, design documents, or content of the product. The open-source model is a decentralized sof ...

community on

SourceForge SourceForge is a web service that offers software consumers a centralized online location to control and manage open-source software projects and research business software. It provides source code repository hosting, bug tracking, mirrori ...

under the

GPL license The GNU General Public License (GNU GPL or simply GPL) is a series of widely used free software licenses that guarantee end users the four freedoms to run, study, share, and modify the software. The license was the first copyleft for general ...

. An older update of the Borland code by Sergio Sigala is available under the

BSD license BSD licenses are a family of permissive free software licenses, imposing minimal restrictions on the use and distribution of covered software. This is in contrast to copyleft licenses, which have share-alike requirements. The original BSD li ...

. The Pascal version, which was distributed alongside Borland Pascal 7 on a "bonus" disk, was never released under a

free software license A free-software license is a notice that grants the recipient of a piece of software extensive rights to modify and software distribution, redistribute that software. These actions are usually prohibited by copyright law, but the rights-holde ...

, so the

Free Pascal Free Pascal Compiler (FPC) is a compiler for the closely related programming-language dialects Pascal and Object Pascal. It is free software released under the GNU General Public License, witexception clausesthat allow static linking against i ...

project recreated its own version by backporting a clone made by Leon de Boer that ran in graphical mode back to textmode. The result is called ''Free Vision''. Over the years this codebase has grown stable on nearly all operating systems and architectures that FPC supports. The textmode IDE is very close to the original TP environment, with built-in compiler and IDE much closer than e.g. RHIDE, and supporting functionality like

code folding Code or text folding, or less commonly holophrasting, is a feature of some graphical user interfaces that allows the user to selectively hide ("fold") or display ("unfold") parts of a document. This allows the user to manage large amounts of tex ...

Unicode support

One of the factors limiting Turbo Vision's popularity was the absence of

Unicode Unicode, formally The Unicode Standard,The formal version reference is is an information technology standard for the consistent encoding, representation, and handling of text expressed in most of the world's writing systems. The standard, ...

support in the original Borland version. As of October 2020, there are Unicode versions for C++ and Free Pascal.

References

External links

Free Vision
- Free Pascal's implementation of Turbo Vision
TVision website

"Sigala's version"

A lookalike implementation for Java
{{Pascal programming language family Text user interface libraries Conio Pascal (programming language) libraries Computer libraries Borland software Free software Public-domain software with source code Pascal (programming language) software

Unicode support

See also

References

External links