<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Arial; font-size: 12pt; color: #000000'> ----- Original Message ----- Date: Fri, 24 Apr 2009 20:05:05 +0800 From: ??? <wispernano@gmail.com> Subject: [gtkbuilder] when destroyed, the window cannot open again To: gtk-list@gnome.org Message-ID:         <a4dfa4410904240505j7d28d31bn675851b90dfdebcc@mail.gmail.com> Content-Type: text/plain; charset="utf-8" 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' ... etc. ------------------------------------------------------------------------------------------------------------------------------------------------------------------------   I had the same problem with my first Glade 3-based GUI. What you need to do is i connect to the "delete-event" in the child-window code, as follows:       g_signal_connect(GTK_WINDOW(cwin), "delete-event",                // I used cwClose for the callback,                      G_CALLBACK(cwClose_window), NULL);                     // but you can use any name you want.    and then write the callback function, also in the child window code, as follows:   gboolean cwClose_window(GtkWidget *window, GdkEvent *event, gpointer user_data) {     gtk_widget_hide(GTK_WIDGET(cwin));     return TRUE; }   This "Hides" the window, rather than disposing of it, when the delete-event is triggered, so that when you try to open the child-window again, it will be revealed.   Hope this helps.</div></body></html>