-
- context = gtk_widget_get_style_context (gtk_bin_get_child (GTK_BIN (priv->header)));
-
- gtk_style_context_save (context);
- gtk_style_context_add_class (context, GTK_STYLE_CLASS_EXPANDER);
-
- gtk_style_context_notify_state_change (context,
- gtk_widget_get_window (priv->header),
- GUINT_TO_POINTER (1),
- GTK_STATE_FLAG_ACTIVE,
- !collapsed);
-
- gtk_style_context_restore (context);