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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Common Widgets and Attributes [Next].
FLTK: FLTK Basics
They are most often used to monitor network connections sockets for data-driven displays. This greatly reduces code size and execution time. In addition the program must include a header file for each FLTK class it uses. This chapter teaches you the basics of compiling programs that use FLTK.
Listing 1 – “hello. All following widgets will automatically be children of this window. If you 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 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.
Widgets are commonly ordered into functional groups, which in turn may be grouped again, creating a hierarchy of widgets.
The resulting program will display the window flgk Figure 4. Then we create a box with the “Hello, World! You can build your Microsoft Windows applications as Console or Desktop applications. However, the “set” methods do not call redraw – you have to call it yourself. The labeltype method sets the type of label. A complete list of all label options can be found in the section fltj Labels and Label Types.
The fltk-config script included with FLTK manuao be used to get the options that are required by your compiler:. Idle functions are called when amnual user input is present and no timers or files need to be handled – in short, when the application is not doing anything.
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. 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.
Newly mwnual groups and their derived widgets implicitly call begin in the constructor, effectively adding all subsequently created widgets to itself until end is called. In our “Hello, World! After including the required header files, the program then creates a window. For windows you can also provide the command-line arguments to allow users to customize the appearance, size, and position of your windows.
If not specified the label defaults to NULL. In this example, myGroup would be the current group. In FLTK the top left corner of the window or screen is the origin i. More details are available in the Box Types section.
As before, the fltk-config script included with FLTK can be used to get the options that are required by your linker:.
Timer functions are called after a specific amount of time has expired. You can also specify typefaces directly. Setting the current group to NULL will stop automatic hierarchies.
FLTK also supports idle, timer, and file pseudo-events that cause a function to be called when they occur. FLTK applications must periodically check Fl:: LIB libraries to the “Link” settings.
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 maximum widget size is typically governed by the underlying window system or hardware. User actions such as mouse movement, button clicks, and keyboard activity generate events that are sent to an application. FLTK automatically adds the new box to windowthe current grouping widget.
Documentation – Fast Light Toolkit (FLTK)
Finally, you can use the fltk-config script to compile a single source file as a FLTK program:. The show method shows the widget or window. The x and y parameters determine where the widget or window is placed on the screen.
A “set” method is always of the form “void name type “, and a “get” method is always of the form “type name const”. FLTK supports normal, embossed, and shadowed labels internally, and more types can be added as desired. File functions are called when data is ready to read or write, or when an error condition occurs on a file. For most widgets the arguments to the constructor are:.
All widgets support labels. Similarly, when linking your application you will need to tell the compiler to use the FLTK library:. 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. Listing 1 shows a simple “Hello, World!
You must also define WIN The width and height parameters determine the size of the widget or window in pixels. This is usually done using the -I option:.