In case anyone's interested I solved the problem with a little hack.
I create the progress bar this way:
progBar = gtk_progress_bar_new();
gtk_box_pack_start (GTK_BOX (vboxGr), GTK_PROGRESS_BAR(progBar), FALSE, FALSE,
0);
gtk_widget_show (progBar));
progressBarHack(progBar);
the function progressBarHack() looks like this:
void progressBarHack(GtkWidget* bar)
{
progBar = bar;
}
progBar is a global variable. I get an assertion error when I try to work with
it outside the function where the bar was created.
When I use my hack, which does nothing except some pointer work, everything
works fine.
I don't know why the hack was needed because I've worked with several widgets
with no problems at all. But this thing works.
Cheerz,
Michael
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