Scrollpane show/size issue

[Joel Becker <jlbec evilplan org>]

Folks,
	Here's a bug that started showing up recently.  I have a vbox
inside a GtkScrolledWindow.  I set the whole thing insensitive, then
populate the vbox, then call show_all, then set it sensitive again.
What I am seeing is the first time I do this, sometimes the widgets
don't appear, and when they do, often the scrolled window doesn't put up
the scrollbar.  If I drag resize the window, it discovers its error and
corrects it.  After it has worked once in the application, it continues
to work.
	I have attached a testcase.  If the testcase doesn't trigger for
you, figure out how many vbox widgets allow for only one to be
offscreen, and it should then trigger.  I also note that while I call
gtk_progress_bar_set_fraction(bar, 0.0), the progress bar's thumb does
not go away when the scrolled window fails to update correctly.

Joel

-- 

"Depend on the rabbit's foot if you will, but remember, it didn't
 help the rabbit."
	- R. E. Shay

			http://www.jlbec.org/
			jlbec evilplan org

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include <glib.h>
#include <gtk/gtk.h>


static void do_quit(GtkWidget *widget, gpointer user_data)
{
    gtk_main_quit();
}

static gboolean do_timeout(gpointer user_data)
{
    gint i;
    gchar *tmp;
    GtkWidget *button, *box, *fr, *bar;
    gint id;

    box = GTK_WIDGET(user_data);

    for (i = 0; i < 11; i++)
    {
        tmp = g_strdup_printf("Button %d", i);
        button = gtk_label_new(tmp);
        g_free(tmp);
        gtk_box_pack_start(GTK_BOX(box), button, FALSE, FALSE, 2);
    }
    gtk_widget_show_all(box);

    id = GPOINTER_TO_INT(gtk_object_get_data(GTK_OBJECT(box),
                                             "progress"));
    fr = GTK_WIDGET(gtk_object_get_data(GTK_OBJECT(box), "frame"));
    bar = GTK_WIDGET(gtk_object_get_data(GTK_OBJECT(box), "bar"));
    g_source_remove(id);
    gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(bar), 0.0);
    gtk_frame_set_label(GTK_FRAME(fr), "Hello");
    gtk_widget_set_sensitive(fr, TRUE);
    return(FALSE);
}

gint main(gint argc, gchar *argv[])
{
    GtkWidget *top, *nb, *sc, *box, *tbox, *bar, *fr;
    gint id;

    gtk_set_locale();
    gtk_init(&argc, &argv);

    top = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_default_size(GTK_WINDOW(top), 300, 300);
    gtk_container_set_border_width(GTK_CONTAINER(top), 5);
    gtk_signal_connect(GTK_OBJECT(top), "destroy",
                       GTK_SIGNAL_FUNC(do_quit), NULL);
    gtk_signal_connect(GTK_OBJECT(top), "delete-event",
                       GTK_SIGNAL_FUNC(do_quit), NULL);

    nb = gtk_notebook_new();
    gtk_notebook_set_show_tabs(GTK_NOTEBOOK(nb), FALSE);
    gtk_notebook_set_show_border(GTK_NOTEBOOK(nb), FALSE);

    sc = gtk_scrolled_window_new(NULL, NULL);
    gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(sc),
                                   GTK_POLICY_AUTOMATIC,
                                   GTK_POLICY_AUTOMATIC);
    gtk_container_set_border_width(GTK_CONTAINER(sc), 3);

    box = gtk_vbox_new(FALSE, 2);

    gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(sc), box);

    gtk_notebook_append_page(GTK_NOTEBOOK(nb), sc, NULL);

    fr = gtk_frame_new(NULL);
    gtk_container_add(GTK_CONTAINER(fr), nb);

    tbox = gtk_vbox_new(FALSE, 2);
    gtk_box_pack_start(GTK_BOX(tbox), fr, TRUE, TRUE, 2);

    bar = gtk_progress_bar_new();
    gtk_progress_bar_set_orientation(GTK_PROGRESS_BAR(bar),
                                     GTK_PROGRESS_LEFT_TO_RIGHT);
    gtk_progress_bar_set_bar_style(GTK_PROGRESS_BAR(bar),
                                   GTK_PROGRESS_CONTINUOUS);
    gtk_progress_bar_set_pulse_step(GTK_PROGRESS_BAR(bar), 0.05);
    gtk_box_pack_end(GTK_BOX(tbox), bar, FALSE, FALSE, 2);

    gtk_object_set_data(GTK_OBJECT(box), "frame", fr);
    gtk_object_set_data(GTK_OBJECT(box), "bar", bar);

    gtk_container_add(GTK_CONTAINER(top), tbox);

    id = g_timeout_add(100, (GtkFunction)gtk_progress_bar_pulse, bar);
    gtk_object_set_data(GTK_OBJECT(box), "progress",
                        GINT_TO_POINTER(id));
    g_timeout_add(1000, do_timeout, box);

    gtk_widget_set_sensitive(fr, FALSE);
    gtk_widget_show_all(top);
    gtk_main();

    return(0);
}