On Sun, 2006-12-24 at 00:26 +0100, Tomasz Jankowski wrote:
> Hello!
>
> This is simple code:
> #include <gtk/gtk.h>
>
> gboolean pulse_it (gpointer data) {
> gtk_progress_bar_pulse (data);
> return TRUE;
> }
>
> gint thread_fun (gpointer data) {
> gint source_id = g_timeout_add (100, (GSourceFunc) pulse_it, data);
>
> g_usleep (5000000);
>
> g_source_remove (source_id);
>
> gdk_threads_enter ();
> gtk_progress_bar_set_text (data, "lol!");
> gdk_threads_leave ();
> }
>
> int main( int argc,
> char *argv[])
> {
> GtkWidget *window;
> GtkWidget *pbar;
>
> gtk_init (&argc, &argv);
>
> g_thread_init (NULL);
>
> window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
> pbar = gtk_progress_bar_new ();
>
> gtk_container_add (GTK_CONTAINER (window), GTK_WIDGET (pbar));
>
> gtk_widget_show_all (window);
>
> g_thread_create (thread_fun, pbar, FALSE, NULL);
>
> gdk_threads_enter ();
> gtk_main ();
> gdk_threads_leave ();
>
> return 0;
> }
>
>
> It doesn't work form me. Progress bar is pulsing, but when event source is
> removed something weird starts happening. Whole application still works, but
> GUI doesn't update (new progress bar's text doesn't display). Any idea how
> to solve this?! Maybe I'm too stupid...
>
> I use Ubuntu with GTK+v.2.10.6, GLib 2.12.4 and GCC 4.1
>
I'm no expert in either gtk or threads, but this seems to be the most
usual way to solve your problem:
*change your function so it doesn't require to use gdk_threads_...:
gint thread_fun (gpointer data) {
gint source_id = g_timeout_add (100, (GSourceFunc) pulse_it, data);
g_usleep (5000000);
g_source_remove (source_id);
source_id = g_timeout_add(0, (GSourceFunc) set_lol_text, data);
// gdk_threads_enter ();
//gtk_progress_bar_set_text (data, "lol!");
//gdk_threads_leave ();
}
*add a new function to change the text. This function returns FALSE
indicating that it must be called only once:
gboolean set_lol_text (gpointer data) {
gtk_progress_bar_set_text (data, "LOL!");
return FALSE;
}
I hope this helps.
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