void hierarchy_changed ( GtkWidget* self, GtkWidget* previous_toplevel, gpointer user_data )
The ::hierarchy-changed signal is emitted when the
anchored state of a widget changes. A widget is
“anchored” when its toplevel
ancestor is a
GtkWindow. This signal is emitted when
a widget changes from un-anchored to anchored or vice-versa.
|Default handler: |
The default handler is called after the handlers added via
The previous toplevel ancestor, or
NULLif the widget was previously unanchored.
The argument can be
The data is owned by the caller of the function.