FLTK (pronounced "fulltick") is a cross-platform C++ GUI toolkit. FLTK programs developed under Code::Blocks-EP for Windows® can then be easily ported to UNIX®/Linux® (X11) and MacOS® X. Many applications, both commercial and open-source have been developed with FLTK.
FLTK is designed to be small and modular enough to be statically linked, which is important in development environments like Quincy and Code::Blocks.
FLTK also includes an excellent GUI builder called FLUID that can be used to create applications in minutes.
The example programs offered here all come with the full distribution of the FLTK library at http://fltk.org
Before we start
Get the example from the zip file: FLTKexamples.zip (note: Only one Code::Blocks-ready project is in these examples).
Save the archive into the new "FLTKexamples" subdirectory, and extract all the source files from the archive into that directory. The directory contains many separate examples. The Code::Blocks "CubeView" project is located in the separate directory CubeView4CodeBlocks.
You may note that the C++ source files in the examples directory have extension ".cxx", and not the ".cpp" favoured by Microsoft. This does not pose a problem, as IDEs treat ".cpp", ".cc" and ".cxx" in exactly the same way.
In addition to C++ source files the directory contains image files used in the various projects (.png or .xbm), Windows resource files (.rc), FLUID project files (.fl), various icons, etc...
In addition to the CubeView example, the directory contains code for examples:
| adjuster arc ask bitmap blocks boxtype browser button buttons checkers clock colbrowser cube CubeView cursor curve demo doublebuffer editor fast_slow file_chooser fonts forms fractals fullscreen gl_overlay glpuzzle hello help |
iconize image inactive input input_choice keyboard label line_style mandelbrot minimum navigation output overlay pack pixmap preferences radio resize resizebox scroll shape subwindow sudoku symbols tabs threads tile tiled_image valuators |
Load the "Cubeview"project with Code::Blocks
-The cubeview program is used to demonstrate how to generate a whole FLTK program using the FLUID User Interface Builder.

Cubeview rotates a cube in 3 dimensions using mouse controls.
Build the project with Code::Blocks and run it.
Studying the "CubeView" project
The FLTK documentation offers a tutorial dedicated to the construction of Cubeview.
This tutorial will show you how the graphical interface can be fully generated using the FLUID GUI tool, available from the Code::Blocks-EP "Tools" menu.
You can now load the other FLTK examples and create FLTK projects that will enable you to build them. With some of them you may need to add one or more of the extra FLTK libraries: fltk_forms, fltk_gl, fltk_images, fltk_jpeg, fltk_png and fltk_z.
You will need to refer frequently to the FLTK API documentation. You can reach it from the Code::Blocks "Programmer's Help" menu entry, or by following this link:
