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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Idle callbacks vltk often used to update a 3D display or do other background processing. The resulting program will display the window in Figure 4. 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.

FLTK automatically adds the new box to windowthe current grouping widget. Fptk maximum widget size is typically governed by the underlying window system or hardware. However, the “set” methods do not call redraw – you have to call it yourself.

After including the required header files, the program then creates a window. LIB libraries to the “Link” settings.

Finally, you can use the fltk-config script to compile flt, single source file as a FLTK program:. A “set” method is always of the form “void name type “, and a “get” method is always of the form “type name const”.

This chapter teaches you the basics of compiling programs that use FLTK. As before, the fltk-config script included with FLTK can be used to get the options that are required by your linker:. The show method shows the widget or window.



The labeltype method sets the type of label. All widgets support labels. In the case of window widgets, the label is used for the label in the title bar. User actions such as mouse movement, button clicks, and keyboard activity generate events that are sent to an application. All following widgets will automatically be children of this window. File functions are called when data is ready to read or write, or when an error condition occurs on a file.

A complete list manuaal all label options can be found in the section on Labels and Label Types. Timer functions are called after a specific amount of time has expired.

You can quit the program by closing the window or pressing the ESC ape key. Listing 1 – “hello. 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:.


You must also define WIN 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.

The width and height parameters determine the size of the widget or window in pixels. If rltk want to use the standard C main function as the entry point, FLTK includes a WinMain function that will call your main function for you.


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. This greatly reduces code size and execution time. For most widgets the arguments to the constructor are:. The previous section described how to use fltk-config to build a program consisting of a flyk source file from the command line, and this is very convenient for small test programs.

More details are available in the Box Types section. Similarly, when linking your application you will need to tell the compiler to use the FLTK library:. Common Widgets and Attributes [Next]. In FLTK the top left corner of the window or screen is the origin i.

They are most often used to monitor network connections sockets for data-driven displays. You can build your Microsoft Windows applications as Console or Desktop applications. Setting the current group to NULL will stop automatic hierarchies. Listing 1 shows a simple “Hello, World! You can also specify typefaces directly.

In this example, myGroup would be the manuwl group. The fltk-config script included with FLTK can be used to get the options that are required by your compiler:. In addition the program must include a header file for each FLTK class it manuap.

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