Determines whether widget is a toplevel widget.
Currently only #GtkWindow and #GtkInvisible (and out-of-process #GtkPlugs) are toplevel widgets. Toplevel widgets have no parent widget.
true if widget is a toplevel, false otherwise
Determines whether widget is a toplevel widget.
Currently only #GtkWindow and #GtkInvisible (and out-of-process #GtkPlugs) are toplevel widgets. Toplevel widgets have no parent widget.