GTK_TREE_VIEW_DROP_INTO_OR_BEFORE, GTK_TREE_VIEW_DROP_INTO_OR_AFTER } GtkTreeViewDropPosition; #define GTK_TYPE_TREE_VIEW (gtk_tree_view_get_type ()) #define GTK_TREE ...
Two captures to you understand the problem... GtkPlacesSidebar has the class "sidebar" in the parent widget.. and cut her child GtkTreeView.. If remove the class is shown correctly..