FLTK 1.3.2

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Preface

This manual describes the Fast Light Tool Kit ("FLTK") version 1.3.2, a C++ Graphical User Interface ("GUI") toolkit for UNIX, Microsoft Windows and Apple OS X.

Each of the chapters in this manual is designed as a tutorial for using FLTK, while the appendices provide a convenient reference for all FLTK widgets, functions, and operating system interfaces.

This manual may be printed, modified, and/or used under the terms of the FLTK license provided in Software License.

## Organization

This manual is organized into the following chapters and appendices:

- Introduction to FLTK
- FLTK Basics
- Common Widgets and Attributes
- Designing a Simple Text Editor
- Drawing Things in FLTK
- Handling Events
- Adding and Extending Widgets
- Using OpenGL
- Programming with FLUID
- Advanced FLTK
- Unicode and UTF-8 Support
- FLTK Enumerations
- GLUT Compatibility
- Forms Compatibility
- Operating System Issues
- Migrating Code from FLTK 1.0 to 1.1
- Migrating Code from FLTK 1.1 to 1.3
- Developer Information
- Software License
- Example Source Code

## Conventions

This manual was generated using Doxygen (see http://www.doxygen.org/) to process the source code itself, special comments in the code, and additional documentation files. In general, Doxygen recognizes and denotes the following entities as shown:

- classes, such as Fl_Widget,
- methods, such as Fl_Widget::callback(Fl_Callback* cb, void* p),
- functions, such as fl_draw(const char *str, int x, int y),
- internal links, such as Conventions,
- external links, such as http://www.stack.nl/~dimitri/doxygen/

Other code samples and commands are shown in `regular courier type`.

## Abbreviations

The following abbreviations are used in this manual:

X11
  The X Window System version 11.

Xlib
  The X Window System interface library.

MS Windows, WIN32
  The Microsoft Windows Application Programmer's Interface for Windows 2000, Windows XP, Windows Vista, and Windows 7. FLTK uses the preprocessor definition `WIN32` for the 32 bit and 64 bit MS Windows API.

OS X, __APPLE__
  The Apple desktop operating sytem OS X 10.0 and later. MacOS 8 and 9 support was dropped after FLTK 1.0.10. FLTK uses the preprocessor definition `__APPLE__` for OS X.

## Copyrights and Trademarks

FLTK is Copyright 1998-2012 by Bill Spitzak and others. Use and distribution of FLTK is governed by the GNU Library General Public License with 4 exceptions, located in Software License.

UNIX is a registered trademark of the X Open Group, Inc. Microsoft and Windows are registered trademarks of Microsoft Corporation. OpenGL is a registered trademark of Silicon Graphics, Inc. Apple, Macintosh, MacOS, and Mac OS X are registered trademarks of Apple Computer, Inc.

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