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'
- Function names examples are Fl::foo() or fl_foo().
- Class and type names are capitalized: Fl_foo
- Constant enumeration: FL_FOO
- All headers start with <FL/...>
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!");
box->(FL_UP_BOX);
box->labelsize(36);
box->labelfont(FL_BOLD);
box->labeltype(FL_SHADOW_LABEL);
window->end();
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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