CSE 457 Introduction to Computer Graphics
Spring Quarter 2003

Project 1 help session : FLTK

This page is designed to assist you in completing project 1, Impressionist. This is the basic tutorial for using FLTK to create the user interface.

FLTK tutorial

FLTK is a C++ graphical user interface tookit for X(Unix), OpenGL and Microsoft Windows(Nt 4.0, 95, 98).

We won't cover much about FLTK in here, since we will be using FLUID to generate the FLTK source code. But it is good to learn the basic of FLTK so that you can be more familiar with Fluid later on. You can click here to see the complete FLTK Programming Manual.


All public symbols in FLTK start with the charaters 'F' and 'L'


Here is a simple Hello World program that I get from the FLTK Programming Manual.
	#include <FL/Fl.h>
	#include <FL/Fl_Window.H>
	#include <FL/Fl_Box.h>

	int main(int argc, char *argv) {
	  FL_Window *window = new Fl_Window(300, 180);
	  FL_Box *box = new Fl_Box(20, 40, 260, 100, "Hello World!");
	  window->show(argc, argv);
	  return Fl::run()
The statement "FL_Window *window = ..." will create a window with the specified size(36). The next statement will create a box with the "Hello World!" string in it. To format the box and string, we can use "labelfont", "labeltype", etc.

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