> I have an access violation problem in my project, I made a
> small example for demonstration:
You have the params wrong in your static callback method. You want
something like this (note order of "v" and "o" params here!)
static void cb(Fl_Widget *o, void *v) {
((A*)v)->cb_i();
}
The way you have it, you are taking the "Fl_Widget*", which in this case
will be pointing at the button that you clicked on, and are trying to
call the "cb_i()" method on it,
Sort of doing Fl_Button->cb_i();
Of course, "Fl_Button" does not have a "cb_i()" method, but since you
have explicitly cast the "Fl_Button*" to be a "A*", the compiler assumes
you know what you are doing and does not issue a warning at compile
time... You only find out about this at run time...
If you have the params the right way round, then the "void*" will be
holding the "this" pointer for you're "A" class (set when you defined
the button callback with "b->callback(cb,this);"
And that will be what you are wanting, I'd guess.
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