I am using C and Glade with GTK 3. I want to create a simple programming language. I created the basics: code editor, output window etc. But when the user closes the output window, and tries to re-open, this message shows:
(ltc:3443): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GObject'
(ltc:3443): GLib-GObject-CRITICAL **: g_object_class_list_properties: assertion 'G_IS_OBJECT_CLASS (class)' failed
I think the problem is caused by that when the user closes the window, its structure also gets destroyed on the memory.
How do I clone the window? I tried the simple GObject cloning algorithm, but it doesn't clone window content.
Is it possible to make the window not get destroyed when closing or clone it?
Probably what you want, instead of cloning the window, is to make sure that it is not destroyed when closed, and instead hidden.
Try connecting to the delete-event signal and using gtk_widget_hide_on_delete() as the signal handler, or calling it in your signal handler.