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C++ GUI toolkit

The Fast Light Tool Kit ("FLTK", pronounced "fulltick") is a C++ graphical user interface toolkit. FLTK also includes FLUID, the Fast Light User Interface Designer, which allows you to graphically design applications, widgets, or classes for your GUI. The program was designed to be small and modular enough to be statically linked. It also works well as a shared library. 'fltk' does not use macros, templates, multiple inheritance, or exceptions. It is written directly atop Xlib for maximum speed.


Programmer's manual available in HTML format from http://www.fltk.org/doc-1.3/; and in PDF format from http://www.fltk.org/doc-1.3/fltk.pdf

Related Projects



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15 September 2015


exceptions listed in COPYING file

Leaders and contributors

Bill Spitzak Maintainer
Michael Sweet Contributor
Carl Thompson Contributor
Vincent Penne Contributor
Craig P. Earls Contributor
Curtis Edwards Contributor
Gustavo Hime Contributor
Matthias Melcher Contributor

Resources and communication

AudienceResource typeURI
Bug TrackingVCS Repository Webviewhttp://www.fltk.org/str.php
DeveloperVCS Repository Webviewhttp://seriss.com/public/fltk/fltk/branches/branch-1.3/
Debian (Ref)https://tracker.debian.org/pkg/fltk

Software prerequisites

This entry (in part or in whole) was last reviewed on 13 February 2018.


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The copyright and license notices on this page only apply to the text on this page. Any software or copyright-licenses or other similar notices described in this text has its own copyright notice and license, which can usually be found in the distribution or license text itself.