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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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The maximum widget size is typically governed by the underlying window system or hardware. For windows you manusl also provide the command-line arguments to allow users to customize the appearance, size, and position of your windows. Widgets are commonly ordered into functional groups, which in turn may be grouped again, creating a hierarchy of widgets. Our example program calls the labelfontlabelsizeand labeltype methods. All widgets support labels.

However, the “set” methods do not call redraw – you have to call it yourself. As before, the fltk-config script included with FLTK can be used to get the options that are required by your linker:. Listing 1 – “hello. Similarly, when linking your fltkk you will need to tell the compiler to use the FLTK library:. Idle callbacks are often used to update a 3D display or do other background processing.

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:.


Then manuao create a box with the “Hello, World! 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. The show method shows the widget or window.

Setting the current group to NULL will stop automatic hierarchies. In our “Hello, World! The label string must be in static storage such manuak a string flhk because FLTK does not make a copy of it – it just uses the pointer.

After including the required header files, the program then creates a window. 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, manuual so forth. For most widgets the arguments to the constructor are:.

FLTK: FLTK Programming Manual

This is usually done using the -I option:. FLTK also supports idle, timer, and file pseudo-events that cause a function to be called when they occur. More details are available in the Box Types section. If not specified the label defaults to NULL. You can build your Microsoft Windows applications as Console or Desktop applications.

FLTK applications must periodically check Fl:: In FLTK the top left corner of the window or screen is the origin i.

The fltk-config script included with FLTK can be used to get the options that are required by your compiler:. This chapter teaches you the basics of compiling programs that use FLTK. You must also define WIN In the case of window widgets, the label is used for the label in the title bar. They are most often used to monitor network connections sockets for data-driven displays.


The labeltype method sets the type of label.

You can also specify typefaces directly. In addition the program must include a header file for each FLTK class it uses. FLTK automatically adds the new box to windowthe current grouping widget. Timer functions are called after a specific amount of time has expired.


The width and height parameters determine the size of the widget or window in pixels. 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. The resulting program will display the window in Figure 4. In this example, myGroup would be the current group.

You can quit the program by closing the window or pressing the ESC ape key. Common Widgets and Attributes [Next].

They can flgk used to pop lftk a progress dialog after a certain amount of time or do other things that need to happen at more-or-less regular intervals. Finally, you can use the fltk-config script to compile a single source file as a FLTK program:. 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.