questionfor progress bar

["Kim Jongha" <kim jongha gmail com>]

Greeting,

progress bar is updated "only" using timeouts ?

I read some big file and want to show up the progress how much App.
read file. so I use progress bar like below


double val;
for(i = 0; i< SOME_NUMBER; i++)
{
  val = (100.0 /SOME_NUMBER)* i /100.0;
 gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(pbar), val);
  gtk_widget_show(pbar);
}

No error, 'val' value is greater than 0.0 less than 1.0. but it
doesn't work while app. read file. when app read file completly, then
progress bar filled fully is shown up.
I try to use timeouts, and that how can I read file.. ?

give me a advise, thank you.