> [email protected] wrote:
> >> [email protected] wrote:
> >>> I've been using FLTK to wrapper very complex engineering calculations..
> >> See Fl::check():
> >> http://fltk.org/documentation.php/doc-1.1/Fl.html#Fl.check
> >>
> >> Call Fl::check(); within your calculation so that FLTK
> >> can have some CPU to keep the interface alive.
> >>
> > I tried that, it didn't work.
>
> Right; sorry -- think I followed up with a better example.
>
> Since your calculation is in a separate program being read
> through popen(), your FLTK app is likely blocking during
> the fread()/fgets() operations.
>
> So unless you can make those operations non-blocking,
> you'll need to use a thread to manage the popen()/reading/pclose()
> to ensure your app and FLTK doesn't block.
>
> This example avoids threads, but only works under unix, and
> shows how to use popen + fltk:
> http://seriss.com/people/erco/fltk/#add_fd
>
I got the following to compile and run, but it doesn't seem to call HandleFD()
at any point. I call a make -j4 with popen() and had added -d -t for testing:
void HandleFD(int fd, void *data) {
char results[1024]; int *i;
i = (int*) data;
if ( fgets(results, 1023, G_fp) == NULL ) {
run_make->value(0);
Fl::remove_fd(fileno(G_fp)); pclose(G_fp); return;
}
OP_BUF->append(results); run_op->scroll((*i)++, 0);
}
Fl_Light_Button *run_make=(Fl_Light_Button *)0;
static void cb_run_make(Fl_Light_Button* o, void*) {
//
FILE *stream; char command[1024]="", results[1024];
static int i=0;
o->deactivate(); frame->cursor(FL_CURSOR_WAIT);
sprintf(command, UGUNN_CMD, colls_directory->value(), processes->value());
OP_BUF->text("");
if ( ( G_fp = popen(command, "r") ) == NULL ) {fl_message("popen failed");
return;}
Fl::add_fd(fileno(G_fp), HandleFD, &i); sleep(1);
while (run_make->value() == 1) {
sleep(1); frame->redraw(); Fl::flush();}
o->activate(); frame->cursor(FL_CURSOR_DEFAULT);
}
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