[gtkbuilder] when destroyed, the window cannot open again

[施德来 <wispernano gmail com>]

I wirte a sample application use GktBuilder + glade3. there are one main-window(top level) and some other child-window (top level too, creat and show when the menu item is actived, in my code it is named window_rank).
after close the child-window for first time, i click the menu item again. But this child-window cannot be created and showed again. with many errors or warming like this:

(lsacs_gsecu:11866): GLib-GObject-WARNING **: invalid unclassed pointer in cast to `GtkCList'

(lsacs_gsecu:11866): Gtk-CRITICAL **: gtk_clist_append: assertion `GTK_IS_CLIST (clist)' failed

(lsacs_gsecu:11866): GLib-GObject-WARNING **: invalid unclassed pointer in cast to `GtkCList'

(lsacs_gsecu:11866): Gtk-CRITICAL **: gtk_clist_set_text: assertion `GTK_IS_CLIST (clist)' failed

(lsacs_gsecu:11866): GLib-GObject-WARNING **: invalid unclassed pointer in cast to `GtkCList'

(lsacs_gsecu:11866): Gtk-CRITICAL **: gtk_clist_append: assertion `GTK_IS_CLIST (clist)' failed

(lsacs_gsecu:11866): GLib-GObject-WARNING **: invalid unclassed pointer in cast to `GtkCList'

(lsacs_gsecu:11866): Gtk-CRITICAL **: gtk_clist_set_text: assertion `GTK_IS_CLIST (clist)' failed

(lsacs_gsecu:11866): GLib-GObject-WARNING **: invalid unclassed pointer in cast to `GtkCList'

(lsacs_gsecu:11866): Gtk-CRITICAL **: gtk_clist_append: assertion `GTK_IS_CLIST (clist)' failed

(lsacs_gsecu:11866): GLib-GObject-WARNING **: invalid unclassed pointer in cast to `GtkCList'

(lsacs_gsecu:11866): Gtk-CRITICAL **: gtk_clist_set_text: assertion `GTK_IS_CLIST (clist)' failed

(lsacs_gsecu:11866): GLib-GObject-WARNING **: invalid unclassed pointer in cast to `GtkCList'


my code is here:

main.c:

#include "gsecu.h"
#define BUILDER_XML_FILE "gsecu.xml"


gboolean init_app (LsacsGsecu *editor);

int main (int argc, char *argv[])

{
        LsacsGsecu *gsecu;
        gsecu = g_slice_new(LsacsGsecu);

        gtk_init (&argc, &argv);
        if (init_app (gsecu) == FALSE) return 1; /* error loading UI */

        gtk_widget_show(gsecu->window);
        gtk_main();        

        return 0;
}


gboolean init_app (LsacsGsecu *gsecu)

{
        GtkBuilder *builder;
        GError                  *err=NULL;


        /* use GtkBuilder to build our interface from the XML file */
        builder = gtk_builder_new ();

        if (gtk_builder_add_from_file (builder, BUILDER_XML_FILE, &err) == 0)

        {
                error_message (err->message);

                g_error_free (err);
                return FALSE;

        }

        /* get the widgets which will be referenced in callbacks */

        
        gsecu->window = GTK_WIDGET (gtk_builder_get_object (builder, "window"));


        //初始化安全等级
        gsecu->window_rank = GTK_WIDGET (gtk_builder_get_object (builder, "window_rank"));

        gsecu->clist_rank = GTK_WIDGET (gtk_builder_get_object (builder, "clist_rank"));

        gsecu->entry_rank = GTK_WIDGET (gtk_builder_get_object (builder, "entry_rank"));

        

        /* connect signals, passing our LsacsGsecu struct as user data */

        gtk_builder_connect_signals (builder, gsecu);

        /* free memory used by GtkBuilder object */

        g_object_unref (G_OBJECT (builder));

        return TRUE;

}

inittable.c:

void on_initrank_activate (GtkObject *object, LsacsGsecu *gsecu)

{
        struct stat filebuf;

        gchar *p_space = " ";
        int fd,ranknum;

        int i;
        RANKNAME_SREC rankbuf;
        if((fd=open(LSACS_RANKNAME,O_RDWR|O_CREAT|O_APPEND))<0)

        {
                OK_dialog("读取rankname文件出错", gsecu->window_rank);

                return;
        }
        fstat(fd,&filebuf);

        ranknum=(filebuf.st_size/(sizeof(RANKNAME_SREC)));

        for(i=1;i<=ranknum;i++)

        {
                gtk_clist_append(GTK_CLIST(gsecu->clist_rank), &p_space);

                lseek(fd,(i-1)*sizeof(RANKNAME_SREC),SEEK_SET);

                read(fd,&rankbuf,sizeof(RANKNAME_SREC));

                gtk_clist_set_text(GTK_CLIST(gsecu->clist_rank),(i-1),0,rankbuf.rankname);

        }
        close(fd);
        gtk_clist_set_column_width (GTK_CLIST (gsecu->clist_rank), 0, 270);

        gtk_widget_show(gsecu->window_rank);
}


i have spended many many time to solve it, can some one help me !