Re: progress bar not updating in gtk+-2.14.5

[Larry Reaves <larry yrral net>]

It works here with the latest Ubuntu (gtk+ 2.14.4), so if it is a
regression, it was introduced in 2.14.5. (Or Ubuntu has a patch that
covers it up.)  A quick glance at the changelog for 2.14.5 didn't show
anything obvious to me, but I'm far from an expert.

Chisheng:
Try a gtk_widget_queue_draw(GTK_WIDGET(pbar)) after your call to
set_fraction and see if that helps.  Also, I'm assuming your callback is
working properly (you see the numbers scrolling in the console).


-Larry

On Tue, 2008-12-23 at 12:24 -0800, Chisheng Huang wrote:
> Hi,
>
> The attached code will pop up a window with a progress bar in it.
> The fill fraction goes from 0.0 to 1.0 gradually and is reset to 0.0
> when it's bigger than 1.0.  With GTK+ 2.12.10, the appearance of the
> progress bar is constantly updated.  However, with GTK+ 2.14.5, the
> progress bar always remains empty.  Is this change of updating behaviour
> from 2.12.10 to 2.14.5 a bug or an intended feature?  If it's a feature,
> what extra functions do I have to call to make a progess bar update?
>
> Best wishes,
>
> -cph
>
> --------------------------------- cut ---------------------------------
> #include <gtk/gtk.h>
>
> static void destroy( GtkWidget *widget,
>                      gpointer   timeout)
> {
>   g_source_remove (GPOINTER_TO_UINT (timeout));
>   gtk_main_quit ();
> }
>
> static gboolean
> update_pbar (GtkProgressBar *pbar)
> {
>   gdouble frac = gtk_progress_bar_get_fraction (pbar) + 0.01;
>   if (frac > 1.0) 
>     frac = 0.0;
>   g_print ("%f\n", frac);
>   gtk_progress_bar_set_fraction (pbar, frac);
>   return TRUE;
> }
>
> int main( int   argc,
>           char *argv[] )
> {
>     GtkWidget *window;
>     GtkWidget *pbar;
>     guint timeout_id;
>     
>     gtk_init (&argc, &argv);
>
>     window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
>     g_signal_connect (G_OBJECT (window), "destroy",
>                     G_CALLBACK (destroy), &timeout_id);
>     gtk_container_set_border_width (GTK_CONTAINER (window), 10);
>     
>     pbar = gtk_progress_bar_new (); 
>     timeout_id = g_timeout_add (100, (GSourceFunc) update_pbar, pbar);
>     gtk_container_add (GTK_CONTAINER (window), pbar);
>
>     gtk_widget_show (pbar);
>     gtk_widget_show (window);
>     gtk_main ();
>
>     return 0;
> }
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