Jim Wilson wrote:
> Charles West wrote:
>
>> Hello, I am trying to learn how to draw things. Every time I try to
>> run fl_draw_box, I get a segmentation fault. What am I doing wrong?
>
> At first glance, it looks like you're calling the draw() method from
> inside your c'tor.
>
> Normally, you're not in charge of this realm. Your class advertises a
> draw() method, but FLTK decides when to call it. Your program's
> responsibility is to obey FLTK's request. If you want to draw, you must
> beg FLTK with damage() in hopes it intercedes on your behalf.
Right. Documentation wise, see:
http://fltk.org/documentation.php/doc-1.1/drawing.html#drawing
..specifically:
"There are only certain places you can execute drawing code in FLTK.
Calling these functions at other places will result in undefined
behavior!"
For some simple examples, see eg:
http://seriss.com/people/erco/fltk/#FltkX
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