Re: Progress bars and syscalls

[André Pedralho <apedralho gmail com>]

You may use the pthread.h C library and use multiples threads to do
what you want... I don't know exactly how to do it, but it is a way
out for your problem!

-- 
André Pedralho
Bachelor in Computer Science
Instituto Nokia de Tecnologia

On 4/18/05, Aristidas Vilkaitis <A Vilkaitis gamta lt> wrote:
> Hello,
>
>   Since i'm quite new to both C and Gtk, i met a problem which i am not
> able to solve. The     base  of the problem is that i have a task, which
> should fetch several files from the internet. When a button is pressed,
> a new window with a progress bar opens and indicates the progress of the
> task. Basicly, since i thought C is a linear language, i just added
> several system() calls and added gtk_progress_bar_set_fraction between
> them like so:
>
> ...
>   system("wget file.a");
>   gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(pb1), 0.3);
>   system("wget file.b");
>   gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(pb1), 0.6);  ...
>
> and so on.
>
> The result was that the program first executed the system calls, and
> only afterwards did it paint something or tampered with the progress bar.
>
> Why? How to go around this? What to read?
>
> Thank you,
> Fireel
>
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