You can view the FLTK documentation in a number of formats on-line: FLTK Developer Documents Git Quick-Start Guide (updated 28 days ago). HTML. This manual describes the Fast Light Tool Kit (“FLTK”) version , a C++ Graphical This manual is organized into the following chapters and appendices. This software and manual are provided under the terms of the GNU Library General I would like to see a chapter which explains how FLTK solves common .

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Timer manuql are called after a specific amount of time has expired. The application may then ignore the events or respond to the user, typically by redrawing a button in the “down” position, adding the text to an input field, and so forth.

All following widgets will automatically be children of this window. You can build your Microsoft Windows applications as Console or Desktop applications. FLTK supports normal, embossed, and shadowed labels internally, and more types can be added as desired. The previous section described how to use fltk-config to build a program consisting of a single source file from the command line, and this is very convenient for small test programs.


You must also define WIN In addition the program must include a header file for each FLTK class it uses. Similarly, when linking your application you will need to tell the compiler to use the FLTK library:. In this example, myGroup would be the current group.

For most widgets the arguments to the constructor are:. Listing 1 shows a simple “Hello, World! If you want to use the standard C main function as the entry point, FLTK includes manuak WinMain function that will call your main function for you.

You can quit the program by closing the window or pressing the ESC ape key.


After including the required header files, the program then creates a window. The resulting program will display the window in Figure 4. In FLTK the fptk left corner of the window or screen is the origin i. This greatly reduces code size and execution time.

LIB libraries to the “Link” settings. FLTK also supports idle, timer, and file pseudo-events that cause a function to be called when they occur.

Our example program calls the manulalabelsizeand labeltype methods.

FLTK applications must periodically check Fl:: As before, the fltk-config script included with FLTK can be used to get the options tltk are required by your linker:.

The maximum widget size is typically governed by the underlying window system or hardware. Setting the current group to NULL will stop automatic hierarchies.

In our “Hello, World! A complete list of all label options can be found in the section on Labels and Label Types. Finally, you can use the fltk-config script to compile a single source file as a FLTK program:. This chapter teaches you the basics of compiling programs that use FLTK. In the case of window widgets, the label is used for the label in the title bar. Then we create a box with the “Hello, World! A “set” method is always of the form “void name type “, and a “get” method is always of the form “type name const”.

If not specified the label defaults to NULL. All widgets support labels. Idle functions are called when no user input is present and no timers or files need to be handled – in short, when the application is not doing anything.

But fltk-config can also be used to set the compiler and linker options as variables within a Makefile that can be used to build programs out of multiple source files:.

This is usually done using the -I option:. The label string must be in static storage such as a string constant because FLTK does not make a copy of it – it just uses the pointer. The labeltype method sets the type of label.


Documentation – Fast Light Toolkit (FLTK)

Common Widgets and Attributes [Next]. Newly created groups and their derived widgets implicitly call begin in the constructor, effectively adding all subsequently created widgets to itself until end is called. User actions such as mouse movement, button clicks, and keyboard activity generate events that are sent to an application.

More details are available in the Box Types section. However, the “set” methods do not call redraw – you have to call it yourself. Widgets are commonly ordered into functional groups, which in turn may be grouped again, creating a hierarchy of widgets.

Idle callbacks are often used to update a 3D display or do other background processing. File functions are called when data is ready to read or write, or when an error condition occurs on a file. The x and y parameters determine where the widget or window is placed on the screen.

The fltk-config script included with FLTK can be used to get the options that are required by your compiler:. They can be used to pop up a progress dialog after a certain amount of time or do other things that need to happen at more-or-less regular intervals. The show method shows the widget or window. Listing 1 – “hello. They are most often used to monitor network connections sockets for data-driven displays. For windows you can also provide the command-line arguments to allow users to customize the appearance, size, and position of your windows.