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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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:. The show method shows the widget or window. 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. This chapter teaches you the basics of compiling programs that use FLTK. 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.

Documentation – Fast Light Toolkit (FLTK)

As before, the fltk-config script included with FLTK can be used to get the options that are required by your linker:. Setting the current group to NULL will stop automatic hierarchies. However, the “set” methods do not call redraw – you have to call it yourself. Then we create a box with the “Hello, World! Timer functions are called manaul a specific amount of time has expired.


In FLTK the top left corner of the window or screen is the origin i.


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. Flt, greatly reduces code size and execution time. The resulting program will display the window in Figure 4. FLTK also supports idle, timer, and file pseudo-events that cause a function to be called when they occur. User actions such as mouse movement, button clicks, and keyboard manuxl generate events that are sent to an application.

Listing 1 shows a simple “Hello, World! Listing 1 – “hello. This is usually done using the -I option:. FLTK applications must periodically check Fl:: Idle callbacks are often used to update a 3D display or do other background processing.

More details are available in the Box Types section. The fltk-config script included with FLTK can be used to get the options that are required by your compiler:. For windows you can also provide the command-line arguments to allow users to customize the appearance, size, and position of your windows. LIB libraries to the “Link” settings.

They are most often used to monitor network connections sockets for data-driven displays. You must also define WIN File functions are called when data is ready to read or write, or when an error condition occurs on a maual. Similarly, when linking your application you will need to tell the compiler to use the FLTK library:. 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.


FLTK automatically adds the new box to windowthe current grouping widget. In the case of window widgets, the label is used for the label in the title bar.


The maximum widget size is typically governed by the underlying window system or hardware. Our example program calls the labelfontlabelsizeand labeltype methods. 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.

In this example, myGroup would be the current group. 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.

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. A complete list of all label options can be found in the section on Labels and Label Types.

In addition the program must include a header file for each FLTK class it uses. All following widgets will automatically be children of this window.