Changing a GtkToolButton icon_widget on the fly

[James <jamessteward optusnet com au>]

Hi,

I've been trying to change the icon_widget that's displayed for a
toolbar button while the main window is displayed.  I can't seem to get
the actual image to change, although the functions that call
gtk_tool_button_set_icon_widget(0 do get called.  There's no warnings
either.

I do something like...

GtkWidget *eject_widget;
GtkWidget *eject_red_widget;
GtkToolButton *eject_button;

void green(void)
{
        gtk_tool_button_set_icon_widget(eject_button, eject_widget);
}

void red(void)
{
        gtk_tool_button_set_icon_widget(eject_button, eject_red_widget);
}


int main(int argc, char **argv)
{
<snip>
        GtkBuilder *builder;

        builder = gtk_builder_new();
        gtk_builder_add_from_file(builder, "stridemaster.xml", NULL);

        eject_widget = GTK_WIDGET(gtk_builder_get_object(builder,
"eject_tracker_image"));
        eject_red_widget = GTK_WIDGET(gtk_builder_get_object(builder,
"eject_tracker_red_image"));
        eject_button = GTK_TOOL_BUTTON(gtk_builder_get_object(builder,
"toolbutton_eject_tracker"));

        g_object_unref(G_OBJECT(builder));

        gtk_widget_show(window);

        gtk_main();

<snip>
}

What am I missing?

Regards,
James.